diff --git a/src/apis/abusiveexperiencereport/v1.ts b/src/apis/abusiveexperiencereport/v1.ts
index 347d3e80cb..2c27cf32ad 100644
--- a/src/apis/abusiveexperiencereport/v1.ts
+++ b/src/apis/abusiveexperiencereport/v1.ts
@@ -133,12 +133,12 @@ export class Resource$Sites {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$SiteSummaryResponse>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SiteSummaryResponse>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SiteSummaryResponse>,
       callback?: BodyResponseCallback<Schema$SiteSummaryResponse>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SiteSummaryResponse>,
       callback?: BodyResponseCallback<Schema$SiteSummaryResponse>):
       void|AxiosPromise<Schema$SiteSummaryResponse> {
@@ -196,15 +196,15 @@ export class Resource$Violatingsites {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ViolatingSitesResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ViolatingSitesResponse>,
       callback?: BodyResponseCallback<Schema$ViolatingSitesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ViolatingSitesResponse>,
       callback?: BodyResponseCallback<Schema$ViolatingSitesResponse>):
diff --git a/src/apis/acceleratedmobilepageurl/v1.ts b/src/apis/acceleratedmobilepageurl/v1.ts
index 87eedf57a5..5a8f31a0b2 100644
--- a/src/apis/acceleratedmobilepageurl/v1.ts
+++ b/src/apis/acceleratedmobilepageurl/v1.ts
@@ -155,15 +155,15 @@ export class Resource$Ampurls {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchGet(params: any, options?: MethodOptions):
+  batchGet(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BatchGetAmpUrlsResponse>;
   batchGet(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$BatchGetAmpUrlsResponse>,
       callback?: BodyResponseCallback<Schema$BatchGetAmpUrlsResponse>): void;
   batchGet(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$BatchGetAmpUrlsResponse>,
       callback?: BodyResponseCallback<Schema$BatchGetAmpUrlsResponse>):
diff --git a/src/apis/adexchangebuyer/v1.2.ts b/src/apis/adexchangebuyer/v1.2.ts
index cd7fdb68ab..b39c1202c4 100644
--- a/src/apis/adexchangebuyer/v1.2.ts
+++ b/src/apis/adexchangebuyer/v1.2.ts
@@ -279,10 +279,12 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Account>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Account>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>):
       void|AxiosPromise<Schema$Account> {
     if (typeof options === 'function') {
@@ -327,13 +329,14 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$AccountsList>;
+  list(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$AccountsList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AccountsList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AccountsList>,
       callback?: BodyResponseCallback<Schema$AccountsList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AccountsList>,
       callback?: BodyResponseCallback<Schema$AccountsList>):
       void|AxiosPromise<Schema$AccountsList> {
@@ -381,12 +384,14 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Account>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Account>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>):
       void|AxiosPromise<Schema$Account> {
     if (typeof options === 'function') {
@@ -433,12 +438,14 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Account>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Account>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>):
       void|AxiosPromise<Schema$Account> {
     if (typeof options === 'function') {
@@ -498,10 +505,11 @@ export class Resource$Creatives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Creative>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Creative>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Creative>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Creative>,
       callback?: BodyResponseCallback<Schema$Creative>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Creative>,
       callback?: BodyResponseCallback<Schema$Creative>):
       void|AxiosPromise<Schema$Creative> {
@@ -550,12 +558,13 @@ export class Resource$Creatives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Creative>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Creative>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Creative>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Creative>,
       callback?: BodyResponseCallback<Schema$Creative>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Creative>,
       callback?: BodyResponseCallback<Schema$Creative>):
       void|AxiosPromise<Schema$Creative> {
@@ -605,14 +614,14 @@ export class Resource$Creatives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreativesList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CreativesList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CreativesList>,
       callback?: BodyResponseCallback<Schema$CreativesList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CreativesList>,
       callback?: BodyResponseCallback<Schema$CreativesList>):
       void|AxiosPromise<Schema$CreativesList> {
diff --git a/src/apis/adexchangebuyer/v1.3.ts b/src/apis/adexchangebuyer/v1.3.ts
index 140587ee80..782bcc0a32 100644
--- a/src/apis/adexchangebuyer/v1.3.ts
+++ b/src/apis/adexchangebuyer/v1.3.ts
@@ -687,10 +687,12 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Account>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Account>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>):
       void|AxiosPromise<Schema$Account> {
     if (typeof options === 'function') {
@@ -735,13 +737,14 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$AccountsList>;
+  list(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$AccountsList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AccountsList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AccountsList>,
       callback?: BodyResponseCallback<Schema$AccountsList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AccountsList>,
       callback?: BodyResponseCallback<Schema$AccountsList>):
       void|AxiosPromise<Schema$AccountsList> {
@@ -789,12 +792,14 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Account>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Account>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>):
       void|AxiosPromise<Schema$Account> {
     if (typeof options === 'function') {
@@ -841,12 +846,14 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Account>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Account>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>):
       void|AxiosPromise<Schema$Account> {
     if (typeof options === 'function') {
@@ -905,11 +912,11 @@ export class Resource$Billinginfo {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$BillingInfo>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BillingInfo>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$BillingInfo>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BillingInfo>,
       callback?: BodyResponseCallback<Schema$BillingInfo>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BillingInfo>,
       callback?: BodyResponseCallback<Schema$BillingInfo>):
       void|AxiosPromise<Schema$BillingInfo> {
@@ -956,14 +963,14 @@ export class Resource$Billinginfo {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BillingInfoList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BillingInfoList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BillingInfoList>,
       callback?: BodyResponseCallback<Schema$BillingInfoList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BillingInfoList>,
       callback?: BodyResponseCallback<Schema$BillingInfoList>):
       void|AxiosPromise<Schema$BillingInfoList> {
@@ -1024,10 +1031,10 @@ export class Resource$Budget {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Budget>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Budget>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Budget>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Budget>,
       callback?: BodyResponseCallback<Schema$Budget>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Budget>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Budget>,
       callback?: BodyResponseCallback<Schema$Budget>):
       void|AxiosPromise<Schema$Budget> {
     if (typeof options === 'function') {
@@ -1078,12 +1085,12 @@ export class Resource$Budget {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Budget>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Budget>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Budget>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Budget>,
       callback?: BodyResponseCallback<Schema$Budget>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Budget>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Budget>,
       callback?: BodyResponseCallback<Schema$Budget>):
       void|AxiosPromise<Schema$Budget> {
     if (typeof options === 'function') {
@@ -1133,12 +1140,12 @@ export class Resource$Budget {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Budget>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Budget>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Budget>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Budget>,
       callback?: BodyResponseCallback<Schema$Budget>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Budget>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Budget>,
       callback?: BodyResponseCallback<Schema$Budget>):
       void|AxiosPromise<Schema$Budget> {
     if (typeof options === 'function') {
@@ -1199,10 +1206,11 @@ export class Resource$Creatives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Creative>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Creative>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Creative>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Creative>,
       callback?: BodyResponseCallback<Schema$Creative>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Creative>,
       callback?: BodyResponseCallback<Schema$Creative>):
       void|AxiosPromise<Schema$Creative> {
@@ -1251,12 +1259,13 @@ export class Resource$Creatives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Creative>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Creative>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Creative>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Creative>,
       callback?: BodyResponseCallback<Schema$Creative>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Creative>,
       callback?: BodyResponseCallback<Schema$Creative>):
       void|AxiosPromise<Schema$Creative> {
@@ -1308,14 +1317,14 @@ export class Resource$Creatives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreativesList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CreativesList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CreativesList>,
       callback?: BodyResponseCallback<Schema$CreativesList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CreativesList>,
       callback?: BodyResponseCallback<Schema$CreativesList>):
       void|AxiosPromise<Schema$CreativesList> {
@@ -1374,11 +1383,11 @@ export class Resource$Directdeals {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$DirectDeal>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DirectDeal>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$DirectDeal>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DirectDeal>,
       callback?: BodyResponseCallback<Schema$DirectDeal>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DirectDeal>,
       callback?: BodyResponseCallback<Schema$DirectDeal>):
       void|AxiosPromise<Schema$DirectDeal> {
@@ -1424,14 +1433,14 @@ export class Resource$Directdeals {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DirectDealsList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DirectDealsList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DirectDealsList>,
       callback?: BodyResponseCallback<Schema$DirectDealsList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DirectDealsList>,
       callback?: BodyResponseCallback<Schema$DirectDealsList>):
       void|AxiosPromise<Schema$DirectDealsList> {
@@ -1494,14 +1503,15 @@ export class Resource$Performancereport {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PerformanceReportList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PerformanceReportList>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$PerformanceReportList>,
       callback?: BodyResponseCallback<Schema$PerformanceReportList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$PerformanceReportList>,
       callback?: BodyResponseCallback<Schema$PerformanceReportList>):
@@ -1562,12 +1572,12 @@ export class Resource$Pretargetingconfig {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1615,12 +1625,12 @@ export class Resource$Pretargetingconfig {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$PretargetingConfig>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PretargetingConfig>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PretargetingConfig>,
       callback?: BodyResponseCallback<Schema$PretargetingConfig>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PretargetingConfig>,
       callback?: BodyResponseCallback<Schema$PretargetingConfig>):
       void|AxiosPromise<Schema$PretargetingConfig> {
@@ -1670,14 +1680,14 @@ export class Resource$Pretargetingconfig {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PretargetingConfig>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PretargetingConfig>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PretargetingConfig>,
       callback?: BodyResponseCallback<Schema$PretargetingConfig>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PretargetingConfig>,
       callback?: BodyResponseCallback<Schema$PretargetingConfig>):
       void|AxiosPromise<Schema$PretargetingConfig> {
@@ -1726,15 +1736,15 @@ export class Resource$Pretargetingconfig {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PretargetingConfigList>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$PretargetingConfigList>,
       callback?: BodyResponseCallback<Schema$PretargetingConfigList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$PretargetingConfigList>,
       callback?: BodyResponseCallback<Schema$PretargetingConfigList>):
@@ -1786,14 +1796,14 @@ export class Resource$Pretargetingconfig {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PretargetingConfig>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PretargetingConfig>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PretargetingConfig>,
       callback?: BodyResponseCallback<Schema$PretargetingConfig>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PretargetingConfig>,
       callback?: BodyResponseCallback<Schema$PretargetingConfig>):
       void|AxiosPromise<Schema$PretargetingConfig> {
@@ -1844,14 +1854,14 @@ export class Resource$Pretargetingconfig {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PretargetingConfig>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PretargetingConfig>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PretargetingConfig>,
       callback?: BodyResponseCallback<Schema$PretargetingConfig>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PretargetingConfig>,
       callback?: BodyResponseCallback<Schema$PretargetingConfig>):
       void|AxiosPromise<Schema$PretargetingConfig> {
diff --git a/src/apis/adexchangebuyer/v1.4.ts b/src/apis/adexchangebuyer/v1.4.ts
index 467a958e1a..103089e70e 100644
--- a/src/apis/adexchangebuyer/v1.4.ts
+++ b/src/apis/adexchangebuyer/v1.4.ts
@@ -1764,10 +1764,12 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Account>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Account>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>):
       void|AxiosPromise<Schema$Account> {
     if (typeof options === 'function') {
@@ -1812,13 +1814,14 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$AccountsList>;
+  list(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$AccountsList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AccountsList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AccountsList>,
       callback?: BodyResponseCallback<Schema$AccountsList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AccountsList>,
       callback?: BodyResponseCallback<Schema$AccountsList>):
       void|AxiosPromise<Schema$AccountsList> {
@@ -1867,12 +1870,14 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Account>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Account>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>):
       void|AxiosPromise<Schema$Account> {
     if (typeof options === 'function') {
@@ -1920,12 +1925,14 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Account>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Account>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>):
       void|AxiosPromise<Schema$Account> {
     if (typeof options === 'function') {
@@ -1984,11 +1991,11 @@ export class Resource$Billinginfo {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$BillingInfo>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BillingInfo>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$BillingInfo>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BillingInfo>,
       callback?: BodyResponseCallback<Schema$BillingInfo>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BillingInfo>,
       callback?: BodyResponseCallback<Schema$BillingInfo>):
       void|AxiosPromise<Schema$BillingInfo> {
@@ -2035,14 +2042,14 @@ export class Resource$Billinginfo {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BillingInfoList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BillingInfoList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BillingInfoList>,
       callback?: BodyResponseCallback<Schema$BillingInfoList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BillingInfoList>,
       callback?: BodyResponseCallback<Schema$BillingInfoList>):
       void|AxiosPromise<Schema$BillingInfoList> {
@@ -2103,10 +2110,10 @@ export class Resource$Budget {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Budget>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Budget>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Budget>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Budget>,
       callback?: BodyResponseCallback<Schema$Budget>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Budget>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Budget>,
       callback?: BodyResponseCallback<Schema$Budget>):
       void|AxiosPromise<Schema$Budget> {
     if (typeof options === 'function') {
@@ -2157,12 +2164,12 @@ export class Resource$Budget {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Budget>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Budget>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Budget>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Budget>,
       callback?: BodyResponseCallback<Schema$Budget>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Budget>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Budget>,
       callback?: BodyResponseCallback<Schema$Budget>):
       void|AxiosPromise<Schema$Budget> {
     if (typeof options === 'function') {
@@ -2212,12 +2219,12 @@ export class Resource$Budget {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Budget>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Budget>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Budget>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Budget>,
       callback?: BodyResponseCallback<Schema$Budget>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Budget>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Budget>,
       callback?: BodyResponseCallback<Schema$Budget>):
       void|AxiosPromise<Schema$Budget> {
     if (typeof options === 'function') {
@@ -2278,12 +2285,12 @@ export class Resource$Creatives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  addDeal(params: any, options?: MethodOptions): AxiosPromise<void>;
+  addDeal(params?: any, options?: MethodOptions): AxiosPromise<void>;
   addDeal(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   addDeal(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2332,10 +2339,11 @@ export class Resource$Creatives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Creative>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Creative>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Creative>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Creative>,
       callback?: BodyResponseCallback<Schema$Creative>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Creative>,
       callback?: BodyResponseCallback<Schema$Creative>):
       void|AxiosPromise<Schema$Creative> {
@@ -2384,12 +2392,13 @@ export class Resource$Creatives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Creative>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Creative>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Creative>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Creative>,
       callback?: BodyResponseCallback<Schema$Creative>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Creative>,
       callback?: BodyResponseCallback<Schema$Creative>):
       void|AxiosPromise<Schema$Creative> {
@@ -2442,14 +2451,14 @@ export class Resource$Creatives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreativesList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CreativesList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CreativesList>,
       callback?: BodyResponseCallback<Schema$CreativesList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CreativesList>,
       callback?: BodyResponseCallback<Schema$CreativesList>):
       void|AxiosPromise<Schema$CreativesList> {
@@ -2497,14 +2506,14 @@ export class Resource$Creatives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listDeals(params: any, options?: MethodOptions):
+  listDeals(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreativeDealIds>;
   listDeals(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CreativeDealIds>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CreativeDealIds>,
       callback?: BodyResponseCallback<Schema$CreativeDealIds>): void;
   listDeals(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CreativeDealIds>,
       callback?: BodyResponseCallback<Schema$CreativeDealIds>):
       void|AxiosPromise<Schema$CreativeDealIds> {
@@ -2555,12 +2564,12 @@ export class Resource$Creatives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  removeDeal(params: any, options?: MethodOptions): AxiosPromise<void>;
+  removeDeal(params?: any, options?: MethodOptions): AxiosPromise<void>;
   removeDeal(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   removeDeal(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2620,15 +2629,15 @@ export class Resource$Marketplacedeals {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions):
+  delete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DeleteOrderDealsResponse>;
   delete(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$DeleteOrderDealsResponse>,
       callback?: BodyResponseCallback<Schema$DeleteOrderDealsResponse>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$DeleteOrderDealsResponse>,
       callback?: BodyResponseCallback<Schema$DeleteOrderDealsResponse>):
@@ -2678,14 +2687,15 @@ export class Resource$Marketplacedeals {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AddOrderDealsResponse>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AddOrderDealsResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$AddOrderDealsResponse>,
       callback?: BodyResponseCallback<Schema$AddOrderDealsResponse>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AddOrderDealsResponse>,
       callback?: BodyResponseCallback<Schema$AddOrderDealsResponse>):
@@ -2735,14 +2745,15 @@ export class Resource$Marketplacedeals {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GetOrderDealsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GetOrderDealsResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$GetOrderDealsResponse>,
       callback?: BodyResponseCallback<Schema$GetOrderDealsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GetOrderDealsResponse>,
       callback?: BodyResponseCallback<Schema$GetOrderDealsResponse>):
@@ -2792,15 +2803,15 @@ export class Resource$Marketplacedeals {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$EditAllOrderDealsResponse>;
   update(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$EditAllOrderDealsResponse>,
       callback?: BodyResponseCallback<Schema$EditAllOrderDealsResponse>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$EditAllOrderDealsResponse>,
       callback?: BodyResponseCallback<Schema$EditAllOrderDealsResponse>):
@@ -2862,14 +2873,15 @@ export class Resource$Marketplacenotes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AddOrderNotesResponse>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AddOrderNotesResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$AddOrderNotesResponse>,
       callback?: BodyResponseCallback<Schema$AddOrderNotesResponse>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AddOrderNotesResponse>,
       callback?: BodyResponseCallback<Schema$AddOrderNotesResponse>):
@@ -2919,14 +2931,15 @@ export class Resource$Marketplacenotes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GetOrderNotesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GetOrderNotesResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$GetOrderNotesResponse>,
       callback?: BodyResponseCallback<Schema$GetOrderNotesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GetOrderNotesResponse>,
       callback?: BodyResponseCallback<Schema$GetOrderNotesResponse>):
@@ -2988,12 +3001,12 @@ export class Resource$Marketplaceprivateauction {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  updateproposal(params: any, options?: MethodOptions): AxiosPromise<void>;
+  updateproposal(params?: any, options?: MethodOptions): AxiosPromise<void>;
   updateproposal(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   updateproposal(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -3056,14 +3069,15 @@ export class Resource$Performancereport {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PerformanceReportList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PerformanceReportList>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$PerformanceReportList>,
       callback?: BodyResponseCallback<Schema$PerformanceReportList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$PerformanceReportList>,
       callback?: BodyResponseCallback<Schema$PerformanceReportList>):
@@ -3124,12 +3138,12 @@ export class Resource$Pretargetingconfig {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -3177,12 +3191,12 @@ export class Resource$Pretargetingconfig {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$PretargetingConfig>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PretargetingConfig>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PretargetingConfig>,
       callback?: BodyResponseCallback<Schema$PretargetingConfig>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PretargetingConfig>,
       callback?: BodyResponseCallback<Schema$PretargetingConfig>):
       void|AxiosPromise<Schema$PretargetingConfig> {
@@ -3232,14 +3246,14 @@ export class Resource$Pretargetingconfig {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PretargetingConfig>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PretargetingConfig>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PretargetingConfig>,
       callback?: BodyResponseCallback<Schema$PretargetingConfig>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PretargetingConfig>,
       callback?: BodyResponseCallback<Schema$PretargetingConfig>):
       void|AxiosPromise<Schema$PretargetingConfig> {
@@ -3288,15 +3302,15 @@ export class Resource$Pretargetingconfig {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PretargetingConfigList>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$PretargetingConfigList>,
       callback?: BodyResponseCallback<Schema$PretargetingConfigList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$PretargetingConfigList>,
       callback?: BodyResponseCallback<Schema$PretargetingConfigList>):
@@ -3348,14 +3362,14 @@ export class Resource$Pretargetingconfig {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PretargetingConfig>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PretargetingConfig>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PretargetingConfig>,
       callback?: BodyResponseCallback<Schema$PretargetingConfig>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PretargetingConfig>,
       callback?: BodyResponseCallback<Schema$PretargetingConfig>):
       void|AxiosPromise<Schema$PretargetingConfig> {
@@ -3406,14 +3420,14 @@ export class Resource$Pretargetingconfig {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PretargetingConfig>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PretargetingConfig>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PretargetingConfig>,
       callback?: BodyResponseCallback<Schema$PretargetingConfig>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PretargetingConfig>,
       callback?: BodyResponseCallback<Schema$PretargetingConfig>):
       void|AxiosPromise<Schema$PretargetingConfig> {
@@ -3474,10 +3488,12 @@ export class Resource$Products {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Product>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Product>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Product>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Product>,
       callback?: BodyResponseCallback<Schema$Product>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Product>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Product>,
       callback?: BodyResponseCallback<Schema$Product>):
       void|AxiosPromise<Schema$Product> {
     if (typeof options === 'function') {
@@ -3523,14 +3539,14 @@ export class Resource$Products {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  search(params: any, options?: MethodOptions):
+  search(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GetOffersResponse>;
   search(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GetOffersResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GetOffersResponse>,
       callback?: BodyResponseCallback<Schema$GetOffersResponse>): void;
   search(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GetOffersResponse>,
       callback?: BodyResponseCallback<Schema$GetOffersResponse>):
       void|AxiosPromise<Schema$GetOffersResponse> {
@@ -3589,10 +3605,11 @@ export class Resource$Proposals {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Proposal>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Proposal>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Proposal>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Proposal>,
       callback?: BodyResponseCallback<Schema$Proposal>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Proposal>,
       callback?: BodyResponseCallback<Schema$Proposal>):
       void|AxiosPromise<Schema$Proposal> {
@@ -3639,14 +3656,14 @@ export class Resource$Proposals {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreateOrdersResponse>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CreateOrdersResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CreateOrdersResponse>,
       callback?: BodyResponseCallback<Schema$CreateOrdersResponse>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CreateOrdersResponse>,
       callback?: BodyResponseCallback<Schema$CreateOrdersResponse>):
       void|AxiosPromise<Schema$CreateOrdersResponse> {
@@ -3696,12 +3713,13 @@ export class Resource$Proposals {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Proposal>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Proposal>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Proposal>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Proposal>,
       callback?: BodyResponseCallback<Schema$Proposal>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Proposal>,
       callback?: BodyResponseCallback<Schema$Proposal>):
       void|AxiosPromise<Schema$Proposal> {
@@ -3750,14 +3768,14 @@ export class Resource$Proposals {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  search(params: any, options?: MethodOptions):
+  search(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GetOrdersResponse>;
   search(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GetOrdersResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GetOrdersResponse>,
       callback?: BodyResponseCallback<Schema$GetOrdersResponse>): void;
   search(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GetOrdersResponse>,
       callback?: BodyResponseCallback<Schema$GetOrdersResponse>):
       void|AxiosPromise<Schema$GetOrdersResponse> {
@@ -3804,12 +3822,12 @@ export class Resource$Proposals {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setupcomplete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  setupcomplete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   setupcomplete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   setupcomplete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -3858,12 +3876,13 @@ export class Resource$Proposals {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Proposal>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Proposal>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Proposal>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Proposal>,
       callback?: BodyResponseCallback<Schema$Proposal>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Proposal>,
       callback?: BodyResponseCallback<Schema$Proposal>):
       void|AxiosPromise<Schema$Proposal> {
@@ -3924,17 +3943,17 @@ export class Resource$Pubprofiles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GetPublisherProfilesByAccountIdResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GetPublisherProfilesByAccountIdResponse>,
       callback?:
           BodyResponseCallback<Schema$GetPublisherProfilesByAccountIdResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GetPublisherProfilesByAccountIdResponse>,
       callback?:
diff --git a/src/apis/adexchangebuyer2/v2beta1.ts b/src/apis/adexchangebuyer2/v2beta1.ts
index bbae7e19c4..446df179cd 100644
--- a/src/apis/adexchangebuyer2/v2beta1.ts
+++ b/src/apis/adexchangebuyer2/v2beta1.ts
@@ -1322,12 +1322,12 @@ export class Resource$Accounts$Clients {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Client>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Client>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Client>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Client>,
       callback?: BodyResponseCallback<Schema$Client>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Client>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Client>,
       callback?: BodyResponseCallback<Schema$Client>):
       void|AxiosPromise<Schema$Client> {
     if (typeof options === 'function') {
@@ -1375,10 +1375,10 @@ export class Resource$Accounts$Clients {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Client>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Client>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Client>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Client>,
       callback?: BodyResponseCallback<Schema$Client>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Client>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Client>,
       callback?: BodyResponseCallback<Schema$Client>):
       void|AxiosPromise<Schema$Client> {
     if (typeof options === 'function') {
@@ -1429,14 +1429,14 @@ export class Resource$Accounts$Clients {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListClientsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListClientsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListClientsResponse>,
       callback?: BodyResponseCallback<Schema$ListClientsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListClientsResponse>,
       callback?: BodyResponseCallback<Schema$ListClientsResponse>):
       void|AxiosPromise<Schema$ListClientsResponse> {
@@ -1486,12 +1486,12 @@ export class Resource$Accounts$Clients {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Client>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Client>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Client>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Client>,
       callback?: BodyResponseCallback<Schema$Client>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Client>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Client>,
       callback?: BodyResponseCallback<Schema$Client>):
       void|AxiosPromise<Schema$Client> {
     if (typeof options === 'function') {
@@ -1553,14 +1553,14 @@ export class Resource$Accounts$Clients$Invitations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ClientUserInvitation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ClientUserInvitation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ClientUserInvitation>,
       callback?: BodyResponseCallback<Schema$ClientUserInvitation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ClientUserInvitation>,
       callback?: BodyResponseCallback<Schema$ClientUserInvitation>):
       void|AxiosPromise<Schema$ClientUserInvitation> {
@@ -1612,12 +1612,12 @@ export class Resource$Accounts$Clients$Invitations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$ClientUserInvitation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ClientUserInvitation>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ClientUserInvitation>,
       callback?: BodyResponseCallback<Schema$ClientUserInvitation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ClientUserInvitation>,
       callback?: BodyResponseCallback<Schema$ClientUserInvitation>):
       void|AxiosPromise<Schema$ClientUserInvitation> {
@@ -1671,16 +1671,16 @@ export class Resource$Accounts$Clients$Invitations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListClientUserInvitationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListClientUserInvitationsResponse>,
       callback?:
           BodyResponseCallback<Schema$ListClientUserInvitationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListClientUserInvitationsResponse>,
       callback?:
@@ -1748,11 +1748,11 @@ export class Resource$Accounts$Clients$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$ClientUser>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ClientUser>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$ClientUser>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ClientUser>,
       callback?: BodyResponseCallback<Schema$ClientUser>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ClientUser>,
       callback?: BodyResponseCallback<Schema$ClientUser>):
       void|AxiosPromise<Schema$ClientUser> {
@@ -1806,15 +1806,15 @@ export class Resource$Accounts$Clients$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListClientUsersResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListClientUsersResponse>,
       callback?: BodyResponseCallback<Schema$ListClientUsersResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListClientUsersResponse>,
       callback?: BodyResponseCallback<Schema$ListClientUsersResponse>):
@@ -1869,13 +1869,14 @@ export class Resource$Accounts$Clients$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$ClientUser>;
+  update(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$ClientUser>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ClientUser>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ClientUser>,
       callback?: BodyResponseCallback<Schema$ClientUser>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ClientUser>,
       callback?: BodyResponseCallback<Schema$ClientUser>):
       void|AxiosPromise<Schema$ClientUser> {
@@ -1943,12 +1944,13 @@ export class Resource$Accounts$Creatives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Creative>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Creative>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Creative>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Creative>,
       callback?: BodyResponseCallback<Schema$Creative>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Creative>,
       callback?: BodyResponseCallback<Schema$Creative>):
       void|AxiosPromise<Schema$Creative> {
@@ -1997,10 +1999,11 @@ export class Resource$Accounts$Creatives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Creative>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Creative>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Creative>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Creative>,
       callback?: BodyResponseCallback<Schema$Creative>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Creative>,
       callback?: BodyResponseCallback<Schema$Creative>):
       void|AxiosPromise<Schema$Creative> {
@@ -2052,14 +2055,15 @@ export class Resource$Accounts$Creatives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListCreativesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListCreativesResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ListCreativesResponse>,
       callback?: BodyResponseCallback<Schema$ListCreativesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListCreativesResponse>,
       callback?: BodyResponseCallback<Schema$ListCreativesResponse>):
@@ -2111,13 +2115,13 @@ export class Resource$Accounts$Creatives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  stopWatching(params: any, options?: MethodOptions):
+  stopWatching(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Empty>;
   stopWatching(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   stopWatching(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2168,12 +2172,13 @@ export class Resource$Accounts$Creatives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Creative>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Creative>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Creative>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Creative>,
       callback?: BodyResponseCallback<Schema$Creative>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Creative>,
       callback?: BodyResponseCallback<Schema$Creative>):
       void|AxiosPromise<Schema$Creative> {
@@ -2225,12 +2230,12 @@ export class Resource$Accounts$Creatives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  watch(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  watch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   watch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   watch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2291,10 +2296,10 @@ export class Resource$Accounts$Creatives$Dealassociations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  add(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
-  add(params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+  add(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  add(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
-  add(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+  add(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2347,16 +2352,16 @@ export class Resource$Accounts$Creatives$Dealassociations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListDealAssociationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListDealAssociationsResponse>,
       callback?: BodyResponseCallback<Schema$ListDealAssociationsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListDealAssociationsResponse>,
       callback?: BodyResponseCallback<Schema$ListDealAssociationsResponse>):
@@ -2410,12 +2415,12 @@ export class Resource$Accounts$Creatives$Dealassociations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  remove(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  remove(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   remove(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   remove(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2533,13 +2538,13 @@ export class Resource$Bidders$Accounts$Filtersets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$FilterSet>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$FilterSet>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$FilterSet>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$FilterSet>,
       callback?: BodyResponseCallback<Schema$FilterSet>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$FilterSet>,
       callback?: BodyResponseCallback<Schema$FilterSet>):
       void|AxiosPromise<Schema$FilterSet> {
@@ -2588,12 +2593,12 @@ export class Resource$Bidders$Accounts$Filtersets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2640,11 +2645,11 @@ export class Resource$Bidders$Accounts$Filtersets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$FilterSet>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$FilterSet>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$FilterSet>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$FilterSet>,
       callback?: BodyResponseCallback<Schema$FilterSet>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$FilterSet>,
       callback?: BodyResponseCallback<Schema$FilterSet>):
       void|AxiosPromise<Schema$FilterSet> {
@@ -2693,15 +2698,15 @@ export class Resource$Bidders$Accounts$Filtersets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListFilterSetsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListFilterSetsResponse>,
       callback?: BodyResponseCallback<Schema$ListFilterSetsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListFilterSetsResponse>,
       callback?: BodyResponseCallback<Schema$ListFilterSetsResponse>):
@@ -2763,15 +2768,15 @@ export class Resource$Bidders$Accounts$Filtersets$Bidmetrics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListBidMetricsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListBidMetricsResponse>,
       callback?: BodyResponseCallback<Schema$ListBidMetricsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListBidMetricsResponse>,
       callback?: BodyResponseCallback<Schema$ListBidMetricsResponse>):
@@ -2835,16 +2840,16 @@ export class Resource$Bidders$Accounts$Filtersets$Bidresponseerrors {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListBidResponseErrorsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListBidResponseErrorsResponse>,
       callback?: BodyResponseCallback<Schema$ListBidResponseErrorsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListBidResponseErrorsResponse>,
       callback?: BodyResponseCallback<Schema$ListBidResponseErrorsResponse>):
@@ -2910,17 +2915,17 @@ export class Resource$Bidders$Accounts$Filtersets$Bidresponseswithoutbids {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListBidResponsesWithoutBidsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListBidResponsesWithoutBidsResponse>,
       callback?:
           BodyResponseCallback<Schema$ListBidResponsesWithoutBidsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListBidResponsesWithoutBidsResponse>,
       callback?:
@@ -2988,16 +2993,16 @@ export class Resource$Bidders$Accounts$Filtersets$Filteredbidrequests {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListFilteredBidRequestsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListFilteredBidRequestsResponse>,
       callback?: BodyResponseCallback<Schema$ListFilteredBidRequestsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListFilteredBidRequestsResponse>,
       callback?: BodyResponseCallback<Schema$ListFilteredBidRequestsResponse>):
@@ -3069,15 +3074,15 @@ export class Resource$Bidders$Accounts$Filtersets$Filteredbids {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListFilteredBidsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListFilteredBidsResponse>,
       callback?: BodyResponseCallback<Schema$ListFilteredBidsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListFilteredBidsResponse>,
       callback?: BodyResponseCallback<Schema$ListFilteredBidsResponse>):
@@ -3142,16 +3147,16 @@ export class Resource$Bidders$Accounts$Filtersets$Filteredbids$Creatives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListCreativeStatusBreakdownByCreativeResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$ListCreativeStatusBreakdownByCreativeResponse>,
       callback?: BodyResponseCallback<
           Schema$ListCreativeStatusBreakdownByCreativeResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$ListCreativeStatusBreakdownByCreativeResponse>,
       callback?: BodyResponseCallback<
@@ -3222,16 +3227,16 @@ export class Resource$Bidders$Accounts$Filtersets$Filteredbids$Details {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListCreativeStatusBreakdownByDetailResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListCreativeStatusBreakdownByDetailResponse>,
       callback?: BodyResponseCallback<
           Schema$ListCreativeStatusBreakdownByDetailResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListCreativeStatusBreakdownByDetailResponse>,
       callback?: BodyResponseCallback<
@@ -3301,16 +3306,16 @@ export class Resource$Bidders$Accounts$Filtersets$Impressionmetrics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListImpressionMetricsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListImpressionMetricsResponse>,
       callback?: BodyResponseCallback<Schema$ListImpressionMetricsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListImpressionMetricsResponse>,
       callback?: BodyResponseCallback<Schema$ListImpressionMetricsResponse>):
@@ -3375,15 +3380,15 @@ export class Resource$Bidders$Accounts$Filtersets$Losingbids {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListLosingBidsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListLosingBidsResponse>,
       callback?: BodyResponseCallback<Schema$ListLosingBidsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListLosingBidsResponse>,
       callback?: BodyResponseCallback<Schema$ListLosingBidsResponse>):
@@ -3448,17 +3453,17 @@ export class Resource$Bidders$Accounts$Filtersets$Nonbillablewinningbids {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListNonBillableWinningBidsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListNonBillableWinningBidsResponse>,
       callback?:
           BodyResponseCallback<Schema$ListNonBillableWinningBidsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListNonBillableWinningBidsResponse>,
       callback?:
@@ -3548,13 +3553,13 @@ export class Resource$Bidders$Filtersets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$FilterSet>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$FilterSet>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$FilterSet>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$FilterSet>,
       callback?: BodyResponseCallback<Schema$FilterSet>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$FilterSet>,
       callback?: BodyResponseCallback<Schema$FilterSet>):
       void|AxiosPromise<Schema$FilterSet> {
@@ -3603,12 +3608,12 @@ export class Resource$Bidders$Filtersets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -3655,11 +3660,11 @@ export class Resource$Bidders$Filtersets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$FilterSet>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$FilterSet>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$FilterSet>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$FilterSet>,
       callback?: BodyResponseCallback<Schema$FilterSet>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$FilterSet>,
       callback?: BodyResponseCallback<Schema$FilterSet>):
       void|AxiosPromise<Schema$FilterSet> {
@@ -3708,15 +3713,15 @@ export class Resource$Bidders$Filtersets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListFilterSetsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListFilterSetsResponse>,
       callback?: BodyResponseCallback<Schema$ListFilterSetsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListFilterSetsResponse>,
       callback?: BodyResponseCallback<Schema$ListFilterSetsResponse>):
@@ -3778,15 +3783,15 @@ export class Resource$Bidders$Filtersets$Bidmetrics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListBidMetricsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListBidMetricsResponse>,
       callback?: BodyResponseCallback<Schema$ListBidMetricsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListBidMetricsResponse>,
       callback?: BodyResponseCallback<Schema$ListBidMetricsResponse>):
@@ -3850,16 +3855,16 @@ export class Resource$Bidders$Filtersets$Bidresponseerrors {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListBidResponseErrorsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListBidResponseErrorsResponse>,
       callback?: BodyResponseCallback<Schema$ListBidResponseErrorsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListBidResponseErrorsResponse>,
       callback?: BodyResponseCallback<Schema$ListBidResponseErrorsResponse>):
@@ -3924,17 +3929,17 @@ export class Resource$Bidders$Filtersets$Bidresponseswithoutbids {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListBidResponsesWithoutBidsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListBidResponsesWithoutBidsResponse>,
       callback?:
           BodyResponseCallback<Schema$ListBidResponsesWithoutBidsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListBidResponsesWithoutBidsResponse>,
       callback?:
@@ -4001,16 +4006,16 @@ export class Resource$Bidders$Filtersets$Filteredbidrequests {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListFilteredBidRequestsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListFilteredBidRequestsResponse>,
       callback?: BodyResponseCallback<Schema$ListFilteredBidRequestsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListFilteredBidRequestsResponse>,
       callback?: BodyResponseCallback<Schema$ListFilteredBidRequestsResponse>):
@@ -4081,15 +4086,15 @@ export class Resource$Bidders$Filtersets$Filteredbids {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListFilteredBidsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListFilteredBidsResponse>,
       callback?: BodyResponseCallback<Schema$ListFilteredBidsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListFilteredBidsResponse>,
       callback?: BodyResponseCallback<Schema$ListFilteredBidsResponse>):
@@ -4153,16 +4158,16 @@ export class Resource$Bidders$Filtersets$Filteredbids$Creatives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListCreativeStatusBreakdownByCreativeResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$ListCreativeStatusBreakdownByCreativeResponse>,
       callback?: BodyResponseCallback<
           Schema$ListCreativeStatusBreakdownByCreativeResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$ListCreativeStatusBreakdownByCreativeResponse>,
       callback?: BodyResponseCallback<
@@ -4232,16 +4237,16 @@ export class Resource$Bidders$Filtersets$Filteredbids$Details {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListCreativeStatusBreakdownByDetailResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListCreativeStatusBreakdownByDetailResponse>,
       callback?: BodyResponseCallback<
           Schema$ListCreativeStatusBreakdownByDetailResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListCreativeStatusBreakdownByDetailResponse>,
       callback?: BodyResponseCallback<
@@ -4311,16 +4316,16 @@ export class Resource$Bidders$Filtersets$Impressionmetrics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListImpressionMetricsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListImpressionMetricsResponse>,
       callback?: BodyResponseCallback<Schema$ListImpressionMetricsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListImpressionMetricsResponse>,
       callback?: BodyResponseCallback<Schema$ListImpressionMetricsResponse>):
@@ -4385,15 +4390,15 @@ export class Resource$Bidders$Filtersets$Losingbids {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListLosingBidsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListLosingBidsResponse>,
       callback?: BodyResponseCallback<Schema$ListLosingBidsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListLosingBidsResponse>,
       callback?: BodyResponseCallback<Schema$ListLosingBidsResponse>):
@@ -4457,17 +4462,17 @@ export class Resource$Bidders$Filtersets$Nonbillablewinningbids {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListNonBillableWinningBidsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListNonBillableWinningBidsResponse>,
       callback?:
           BodyResponseCallback<Schema$ListNonBillableWinningBidsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListNonBillableWinningBidsResponse>,
       callback?:
diff --git a/src/apis/adexchangeseller/v1.1.ts b/src/apis/adexchangeseller/v1.1.ts
index a9abb9b48d..3a0b870259 100644
--- a/src/apis/adexchangeseller/v1.1.ts
+++ b/src/apis/adexchangeseller/v1.1.ts
@@ -493,10 +493,12 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Account>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Account>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>):
       void|AxiosPromise<Schema$Account> {
     if (typeof options === 'function') {
@@ -555,13 +557,13 @@ export class Resource$Adclients {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$AdClients>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$AdClients>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AdClients>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AdClients>,
       callback?: BodyResponseCallback<Schema$AdClients>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AdClients>,
       callback?: BodyResponseCallback<Schema$AdClients>):
       void|AxiosPromise<Schema$AdClients> {
@@ -623,10 +625,10 @@ export class Resource$Adunits {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$AdUnit>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$AdUnit>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$AdUnit>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$AdUnit>,
       callback?: BodyResponseCallback<Schema$AdUnit>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$AdUnit>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$AdUnit>,
       callback?: BodyResponseCallback<Schema$AdUnit>):
       void|AxiosPromise<Schema$AdUnit> {
     if (typeof options === 'function') {
@@ -678,12 +680,14 @@ export class Resource$Adunits {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$AdUnits>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$AdUnits>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$AdUnits>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AdUnits>,
       callback?: BodyResponseCallback<Schema$AdUnits>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$AdUnits>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AdUnits>,
       callback?: BodyResponseCallback<Schema$AdUnits>):
       void|AxiosPromise<Schema$AdUnits> {
     if (typeof options === 'function') {
@@ -744,14 +748,14 @@ export class Resource$Adunits$Customchannels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CustomChannels>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CustomChannels>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CustomChannels>,
       callback?: BodyResponseCallback<Schema$CustomChannels>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CustomChannels>,
       callback?: BodyResponseCallback<Schema$CustomChannels>):
       void|AxiosPromise<Schema$CustomChannels> {
@@ -813,12 +817,12 @@ export class Resource$Alerts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Alerts>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Alerts>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Alerts>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Alerts>,
       callback?: BodyResponseCallback<Schema$Alerts>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Alerts>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Alerts>,
       callback?: BodyResponseCallback<Schema$Alerts>):
       void|AxiosPromise<Schema$Alerts> {
     if (typeof options === 'function') {
@@ -879,11 +883,12 @@ export class Resource$Customchannels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$CustomChannel>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CustomChannel>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$CustomChannel>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CustomChannel>,
       callback?: BodyResponseCallback<Schema$CustomChannel>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CustomChannel>,
       callback?: BodyResponseCallback<Schema$CustomChannel>):
       void|AxiosPromise<Schema$CustomChannel> {
@@ -935,14 +940,14 @@ export class Resource$Customchannels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CustomChannels>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CustomChannels>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CustomChannels>,
       callback?: BodyResponseCallback<Schema$CustomChannels>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CustomChannels>,
       callback?: BodyResponseCallback<Schema$CustomChannels>):
       void|AxiosPromise<Schema$CustomChannels> {
@@ -1006,12 +1011,14 @@ export class Resource$Customchannels$Adunits {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$AdUnits>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$AdUnits>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$AdUnits>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AdUnits>,
       callback?: BodyResponseCallback<Schema$AdUnits>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$AdUnits>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AdUnits>,
       callback?: BodyResponseCallback<Schema$AdUnits>):
       void|AxiosPromise<Schema$AdUnits> {
     if (typeof options === 'function') {
@@ -1087,12 +1094,13 @@ export class Resource$Metadata$Dimensions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Metadata>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Metadata>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Metadata>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Metadata>,
       callback?: BodyResponseCallback<Schema$Metadata>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Metadata>,
       callback?: BodyResponseCallback<Schema$Metadata>):
       void|AxiosPromise<Schema$Metadata> {
@@ -1151,12 +1159,13 @@ export class Resource$Metadata$Metrics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Metadata>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Metadata>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Metadata>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Metadata>,
       callback?: BodyResponseCallback<Schema$Metadata>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Metadata>,
       callback?: BodyResponseCallback<Schema$Metadata>):
       void|AxiosPromise<Schema$Metadata> {
@@ -1216,11 +1225,12 @@ export class Resource$Preferreddeals {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$PreferredDeal>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PreferredDeal>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$PreferredDeal>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PreferredDeal>,
       callback?: BodyResponseCallback<Schema$PreferredDeal>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PreferredDeal>,
       callback?: BodyResponseCallback<Schema$PreferredDeal>):
       void|AxiosPromise<Schema$PreferredDeal> {
@@ -1266,14 +1276,14 @@ export class Resource$Preferreddeals {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PreferredDeals>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PreferredDeals>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PreferredDeals>,
       callback?: BodyResponseCallback<Schema$PreferredDeals>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PreferredDeals>,
       callback?: BodyResponseCallback<Schema$PreferredDeals>):
       void|AxiosPromise<Schema$PreferredDeals> {
@@ -1344,12 +1354,12 @@ export class Resource$Reports {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  generate(params: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
+  generate(params?: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
   generate(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Report>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>): void;
   generate(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>):
       void|AxiosPromise<Schema$Report> {
     if (typeof options === 'function') {
@@ -1410,12 +1420,12 @@ export class Resource$Reports$Saved {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  generate(params: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
+  generate(params?: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
   generate(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Report>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>): void;
   generate(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>):
       void|AxiosPromise<Schema$Report> {
     if (typeof options === 'function') {
@@ -1462,13 +1472,14 @@ export class Resource$Reports$Saved {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$SavedReports>;
+  list(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$SavedReports>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SavedReports>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SavedReports>,
       callback?: BodyResponseCallback<Schema$SavedReports>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SavedReports>,
       callback?: BodyResponseCallback<Schema$SavedReports>):
       void|AxiosPromise<Schema$SavedReports> {
@@ -1531,13 +1542,13 @@ export class Resource$Urlchannels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$UrlChannels>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$UrlChannels>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UrlChannels>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UrlChannels>,
       callback?: BodyResponseCallback<Schema$UrlChannels>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UrlChannels>,
       callback?: BodyResponseCallback<Schema$UrlChannels>):
       void|AxiosPromise<Schema$UrlChannels> {
diff --git a/src/apis/adexchangeseller/v1.ts b/src/apis/adexchangeseller/v1.ts
index 35a79f5ee6..12a56f7f5a 100644
--- a/src/apis/adexchangeseller/v1.ts
+++ b/src/apis/adexchangeseller/v1.ts
@@ -338,13 +338,13 @@ export class Resource$Adclients {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$AdClients>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$AdClients>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AdClients>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AdClients>,
       callback?: BodyResponseCallback<Schema$AdClients>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AdClients>,
       callback?: BodyResponseCallback<Schema$AdClients>):
       void|AxiosPromise<Schema$AdClients> {
@@ -406,10 +406,10 @@ export class Resource$Adunits {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$AdUnit>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$AdUnit>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$AdUnit>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$AdUnit>,
       callback?: BodyResponseCallback<Schema$AdUnit>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$AdUnit>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$AdUnit>,
       callback?: BodyResponseCallback<Schema$AdUnit>):
       void|AxiosPromise<Schema$AdUnit> {
     if (typeof options === 'function') {
@@ -461,12 +461,14 @@ export class Resource$Adunits {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$AdUnits>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$AdUnits>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$AdUnits>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AdUnits>,
       callback?: BodyResponseCallback<Schema$AdUnits>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$AdUnits>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AdUnits>,
       callback?: BodyResponseCallback<Schema$AdUnits>):
       void|AxiosPromise<Schema$AdUnits> {
     if (typeof options === 'function') {
@@ -527,14 +529,14 @@ export class Resource$Adunits$Customchannels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CustomChannels>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CustomChannels>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CustomChannels>,
       callback?: BodyResponseCallback<Schema$CustomChannels>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CustomChannels>,
       callback?: BodyResponseCallback<Schema$CustomChannels>):
       void|AxiosPromise<Schema$CustomChannels> {
@@ -599,11 +601,12 @@ export class Resource$Customchannels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$CustomChannel>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CustomChannel>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$CustomChannel>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CustomChannel>,
       callback?: BodyResponseCallback<Schema$CustomChannel>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CustomChannel>,
       callback?: BodyResponseCallback<Schema$CustomChannel>):
       void|AxiosPromise<Schema$CustomChannel> {
@@ -655,14 +658,14 @@ export class Resource$Customchannels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CustomChannels>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CustomChannels>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CustomChannels>,
       callback?: BodyResponseCallback<Schema$CustomChannels>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CustomChannels>,
       callback?: BodyResponseCallback<Schema$CustomChannels>):
       void|AxiosPromise<Schema$CustomChannels> {
@@ -725,12 +728,14 @@ export class Resource$Customchannels$Adunits {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$AdUnits>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$AdUnits>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$AdUnits>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AdUnits>,
       callback?: BodyResponseCallback<Schema$AdUnits>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$AdUnits>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AdUnits>,
       callback?: BodyResponseCallback<Schema$AdUnits>):
       void|AxiosPromise<Schema$AdUnits> {
     if (typeof options === 'function') {
@@ -803,12 +808,12 @@ export class Resource$Reports {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  generate(params: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
+  generate(params?: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
   generate(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Report>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>): void;
   generate(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>):
       void|AxiosPromise<Schema$Report> {
     if (typeof options === 'function') {
@@ -869,12 +874,12 @@ export class Resource$Reports$Saved {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  generate(params: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
+  generate(params?: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
   generate(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Report>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>): void;
   generate(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>):
       void|AxiosPromise<Schema$Report> {
     if (typeof options === 'function') {
@@ -921,13 +926,14 @@ export class Resource$Reports$Saved {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$SavedReports>;
+  list(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$SavedReports>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SavedReports>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SavedReports>,
       callback?: BodyResponseCallback<Schema$SavedReports>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SavedReports>,
       callback?: BodyResponseCallback<Schema$SavedReports>):
       void|AxiosPromise<Schema$SavedReports> {
@@ -990,13 +996,13 @@ export class Resource$Urlchannels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$UrlChannels>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$UrlChannels>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UrlChannels>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UrlChannels>,
       callback?: BodyResponseCallback<Schema$UrlChannels>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UrlChannels>,
       callback?: BodyResponseCallback<Schema$UrlChannels>):
       void|AxiosPromise<Schema$UrlChannels> {
diff --git a/src/apis/adexchangeseller/v2.0.ts b/src/apis/adexchangeseller/v2.0.ts
index 203e0cd65c..1bd186551b 100644
--- a/src/apis/adexchangeseller/v2.0.ts
+++ b/src/apis/adexchangeseller/v2.0.ts
@@ -464,10 +464,12 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Account>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Account>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>):
       void|AxiosPromise<Schema$Account> {
     if (typeof options === 'function') {
@@ -514,12 +516,13 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Accounts>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Accounts>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Accounts>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Accounts>,
       callback?: BodyResponseCallback<Schema$Accounts>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Accounts>,
       callback?: BodyResponseCallback<Schema$Accounts>):
       void|AxiosPromise<Schema$Accounts> {
@@ -579,13 +582,13 @@ export class Resource$Accounts$Adclients {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$AdClients>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$AdClients>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AdClients>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AdClients>,
       callback?: BodyResponseCallback<Schema$AdClients>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AdClients>,
       callback?: BodyResponseCallback<Schema$AdClients>):
       void|AxiosPromise<Schema$AdClients> {
@@ -646,12 +649,12 @@ export class Resource$Accounts$Alerts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Alerts>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Alerts>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Alerts>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Alerts>,
       callback?: BodyResponseCallback<Schema$Alerts>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Alerts>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Alerts>,
       callback?: BodyResponseCallback<Schema$Alerts>):
       void|AxiosPromise<Schema$Alerts> {
     if (typeof options === 'function') {
@@ -712,11 +715,12 @@ export class Resource$Accounts$Customchannels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$CustomChannel>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CustomChannel>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$CustomChannel>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CustomChannel>,
       callback?: BodyResponseCallback<Schema$CustomChannel>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CustomChannel>,
       callback?: BodyResponseCallback<Schema$CustomChannel>):
       void|AxiosPromise<Schema$CustomChannel> {
@@ -769,14 +773,14 @@ export class Resource$Accounts$Customchannels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CustomChannels>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CustomChannels>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CustomChannels>,
       callback?: BodyResponseCallback<Schema$CustomChannels>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CustomChannels>,
       callback?: BodyResponseCallback<Schema$CustomChannels>):
       void|AxiosPromise<Schema$CustomChannels> {
@@ -853,12 +857,13 @@ export class Resource$Accounts$Metadata$Dimensions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Metadata>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Metadata>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Metadata>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Metadata>,
       callback?: BodyResponseCallback<Schema$Metadata>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Metadata>,
       callback?: BodyResponseCallback<Schema$Metadata>):
       void|AxiosPromise<Schema$Metadata> {
@@ -920,12 +925,13 @@ export class Resource$Accounts$Metadata$Metrics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Metadata>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Metadata>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Metadata>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Metadata>,
       callback?: BodyResponseCallback<Schema$Metadata>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Metadata>,
       callback?: BodyResponseCallback<Schema$Metadata>):
       void|AxiosPromise<Schema$Metadata> {
@@ -988,11 +994,12 @@ export class Resource$Accounts$Preferreddeals {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$PreferredDeal>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PreferredDeal>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$PreferredDeal>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PreferredDeal>,
       callback?: BodyResponseCallback<Schema$PreferredDeal>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PreferredDeal>,
       callback?: BodyResponseCallback<Schema$PreferredDeal>):
       void|AxiosPromise<Schema$PreferredDeal> {
@@ -1041,14 +1048,14 @@ export class Resource$Accounts$Preferreddeals {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PreferredDeals>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PreferredDeals>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PreferredDeals>,
       callback?: BodyResponseCallback<Schema$PreferredDeals>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PreferredDeals>,
       callback?: BodyResponseCallback<Schema$PreferredDeals>):
       void|AxiosPromise<Schema$PreferredDeals> {
@@ -1121,12 +1128,12 @@ export class Resource$Accounts$Reports {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  generate(params: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
+  generate(params?: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
   generate(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Report>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>): void;
   generate(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>):
       void|AxiosPromise<Schema$Report> {
     if (typeof options === 'function') {
@@ -1189,12 +1196,12 @@ export class Resource$Accounts$Reports$Saved {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  generate(params: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
+  generate(params?: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
   generate(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Report>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>): void;
   generate(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>):
       void|AxiosPromise<Schema$Report> {
     if (typeof options === 'function') {
@@ -1244,13 +1251,14 @@ export class Resource$Accounts$Reports$Saved {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$SavedReports>;
+  list(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$SavedReports>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SavedReports>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SavedReports>,
       callback?: BodyResponseCallback<Schema$SavedReports>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SavedReports>,
       callback?: BodyResponseCallback<Schema$SavedReports>):
       void|AxiosPromise<Schema$SavedReports> {
@@ -1315,13 +1323,13 @@ export class Resource$Accounts$Urlchannels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$UrlChannels>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$UrlChannels>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UrlChannels>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UrlChannels>,
       callback?: BodyResponseCallback<Schema$UrlChannels>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UrlChannels>,
       callback?: BodyResponseCallback<Schema$UrlChannels>):
       void|AxiosPromise<Schema$UrlChannels> {
diff --git a/src/apis/adexperiencereport/v1.ts b/src/apis/adexperiencereport/v1.ts
index 01aa724dc8..bdd61a65c5 100644
--- a/src/apis/adexperiencereport/v1.ts
+++ b/src/apis/adexperiencereport/v1.ts
@@ -150,12 +150,12 @@ export class Resource$Sites {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$SiteSummaryResponse>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SiteSummaryResponse>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SiteSummaryResponse>,
       callback?: BodyResponseCallback<Schema$SiteSummaryResponse>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SiteSummaryResponse>,
       callback?: BodyResponseCallback<Schema$SiteSummaryResponse>):
       void|AxiosPromise<Schema$SiteSummaryResponse> {
@@ -214,15 +214,15 @@ export class Resource$Violatingsites {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ViolatingSitesResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ViolatingSitesResponse>,
       callback?: BodyResponseCallback<Schema$ViolatingSitesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ViolatingSitesResponse>,
       callback?: BodyResponseCallback<Schema$ViolatingSitesResponse>):
diff --git a/src/apis/admin/datatransfer_v1.ts b/src/apis/admin/datatransfer_v1.ts
index b06fd1f11c..753b9db3a2 100644
--- a/src/apis/admin/datatransfer_v1.ts
+++ b/src/apis/admin/datatransfer_v1.ts
@@ -233,11 +233,11 @@ export class Resource$Applications {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Application>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Application>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Application>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Application>,
       callback?: BodyResponseCallback<Schema$Application>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Application>,
       callback?: BodyResponseCallback<Schema$Application>):
       void|AxiosPromise<Schema$Application> {
@@ -287,15 +287,15 @@ export class Resource$Applications {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ApplicationsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ApplicationsListResponse>,
       callback?: BodyResponseCallback<Schema$ApplicationsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ApplicationsListResponse>,
       callback?: BodyResponseCallback<Schema$ApplicationsListResponse>):
@@ -355,11 +355,11 @@ export class Resource$Transfers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$DataTransfer>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DataTransfer>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$DataTransfer>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DataTransfer>,
       callback?: BodyResponseCallback<Schema$DataTransfer>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DataTransfer>,
       callback?: BodyResponseCallback<Schema$DataTransfer>):
       void|AxiosPromise<Schema$DataTransfer> {
@@ -406,14 +406,14 @@ export class Resource$Transfers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DataTransfer>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DataTransfer>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DataTransfer>,
       callback?: BodyResponseCallback<Schema$DataTransfer>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DataTransfer>,
       callback?: BodyResponseCallback<Schema$DataTransfer>):
       void|AxiosPromise<Schema$DataTransfer> {
@@ -466,15 +466,15 @@ export class Resource$Transfers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DataTransfersListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$DataTransfersListResponse>,
       callback?: BodyResponseCallback<Schema$DataTransfersListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$DataTransfersListResponse>,
       callback?: BodyResponseCallback<Schema$DataTransfersListResponse>):
diff --git a/src/apis/admin/directory_v1.ts b/src/apis/admin/directory_v1.ts
index 0ad5f5cf8f..f56bf0697d 100644
--- a/src/apis/admin/directory_v1.ts
+++ b/src/apis/admin/directory_v1.ts
@@ -2379,12 +2379,12 @@ export class Resource$Asps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2430,10 +2430,10 @@ export class Resource$Asps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Asp>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Asp>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Asp>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Asp>,
       callback?: BodyResponseCallback<Schema$Asp>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Asp>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Asp>,
       callback?: BodyResponseCallback<Schema$Asp>):
       void|AxiosPromise<Schema$Asp> {
     if (typeof options === 'function') {
@@ -2479,12 +2479,12 @@ export class Resource$Asps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Asps>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Asps>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Asps>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Asps>,
       callback?: BodyResponseCallback<Schema$Asps>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Asps>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Asps>,
       callback?: BodyResponseCallback<Schema$Asps>):
       void|AxiosPromise<Schema$Asps> {
     if (typeof options === 'function') {
@@ -2542,12 +2542,12 @@ export class Resource$Channels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  stop(params: any, options?: MethodOptions): AxiosPromise<void>;
+  stop(params?: any, options?: MethodOptions): AxiosPromise<void>;
   stop(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   stop(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2607,12 +2607,12 @@ export class Resource$Chromeosdevices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  action(params: any, options?: MethodOptions): AxiosPromise<void>;
+  action(params?: any, options?: MethodOptions): AxiosPromise<void>;
   action(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   action(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2661,12 +2661,12 @@ export class Resource$Chromeosdevices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$ChromeOsDevice>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ChromeOsDevice>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ChromeOsDevice>,
       callback?: BodyResponseCallback<Schema$ChromeOsDevice>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ChromeOsDevice>,
       callback?: BodyResponseCallback<Schema$ChromeOsDevice>):
       void|AxiosPromise<Schema$ChromeOsDevice> {
@@ -2722,14 +2722,14 @@ export class Resource$Chromeosdevices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ChromeOsDevices>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ChromeOsDevices>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ChromeOsDevices>,
       callback?: BodyResponseCallback<Schema$ChromeOsDevices>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ChromeOsDevices>,
       callback?: BodyResponseCallback<Schema$ChromeOsDevices>):
       void|AxiosPromise<Schema$ChromeOsDevices> {
@@ -2779,12 +2779,12 @@ export class Resource$Chromeosdevices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  moveDevicesToOu(params: any, options?: MethodOptions): AxiosPromise<void>;
+  moveDevicesToOu(params?: any, options?: MethodOptions): AxiosPromise<void>;
   moveDevicesToOu(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   moveDevicesToOu(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2834,14 +2834,14 @@ export class Resource$Chromeosdevices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ChromeOsDevice>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ChromeOsDevice>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ChromeOsDevice>,
       callback?: BodyResponseCallback<Schema$ChromeOsDevice>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ChromeOsDevice>,
       callback?: BodyResponseCallback<Schema$ChromeOsDevice>):
       void|AxiosPromise<Schema$ChromeOsDevice> {
@@ -2893,14 +2893,14 @@ export class Resource$Chromeosdevices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ChromeOsDevice>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ChromeOsDevice>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ChromeOsDevice>,
       callback?: BodyResponseCallback<Schema$ChromeOsDevice>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ChromeOsDevice>,
       callback?: BodyResponseCallback<Schema$ChromeOsDevice>):
       void|AxiosPromise<Schema$ChromeOsDevice> {
@@ -2961,10 +2961,11 @@ export class Resource$Customers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Customer>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Customer>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Customer>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Customer>,
       callback?: BodyResponseCallback<Schema$Customer>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Customer>,
       callback?: BodyResponseCallback<Schema$Customer>):
       void|AxiosPromise<Schema$Customer> {
@@ -3012,12 +3013,13 @@ export class Resource$Customers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Customer>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Customer>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Customer>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Customer>,
       callback?: BodyResponseCallback<Schema$Customer>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Customer>,
       callback?: BodyResponseCallback<Schema$Customer>):
       void|AxiosPromise<Schema$Customer> {
@@ -3065,12 +3067,13 @@ export class Resource$Customers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Customer>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Customer>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Customer>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Customer>,
       callback?: BodyResponseCallback<Schema$Customer>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Customer>,
       callback?: BodyResponseCallback<Schema$Customer>):
       void|AxiosPromise<Schema$Customer> {
@@ -3130,12 +3133,12 @@ export class Resource$Domainaliases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -3183,11 +3186,11 @@ export class Resource$Domainaliases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$DomainAlias>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DomainAlias>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$DomainAlias>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DomainAlias>,
       callback?: BodyResponseCallback<Schema$DomainAlias>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DomainAlias>,
       callback?: BodyResponseCallback<Schema$DomainAlias>):
       void|AxiosPromise<Schema$DomainAlias> {
@@ -3237,14 +3240,14 @@ export class Resource$Domainaliases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DomainAlias>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DomainAlias>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DomainAlias>,
       callback?: BodyResponseCallback<Schema$DomainAlias>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DomainAlias>,
       callback?: BodyResponseCallback<Schema$DomainAlias>):
       void|AxiosPromise<Schema$DomainAlias> {
@@ -3293,14 +3296,14 @@ export class Resource$Domainaliases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DomainAliases>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DomainAliases>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DomainAliases>,
       callback?: BodyResponseCallback<Schema$DomainAliases>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DomainAliases>,
       callback?: BodyResponseCallback<Schema$DomainAliases>):
       void|AxiosPromise<Schema$DomainAliases> {
@@ -3361,12 +3364,12 @@ export class Resource$Domains {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -3414,10 +3417,12 @@ export class Resource$Domains {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Domains>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Domains>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Domains>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Domains>,
       callback?: BodyResponseCallback<Schema$Domains>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Domains>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Domains>,
       callback?: BodyResponseCallback<Schema$Domains>):
       void|AxiosPromise<Schema$Domains> {
     if (typeof options === 'function') {
@@ -3466,12 +3471,14 @@ export class Resource$Domains {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Domains>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Domains>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Domains>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Domains>,
       callback?: BodyResponseCallback<Schema$Domains>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Domains>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Domains>,
       callback?: BodyResponseCallback<Schema$Domains>):
       void|AxiosPromise<Schema$Domains> {
     if (typeof options === 'function') {
@@ -3517,12 +3524,13 @@ export class Resource$Domains {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Domains2>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Domains2>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Domains2>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Domains2>,
       callback?: BodyResponseCallback<Schema$Domains2>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Domains2>,
       callback?: BodyResponseCallback<Schema$Domains2>):
       void|AxiosPromise<Schema$Domains2> {
@@ -3583,12 +3591,12 @@ export class Resource$Groups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -3633,10 +3641,10 @@ export class Resource$Groups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Group>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Group>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Group>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Group>,
       callback?: BodyResponseCallback<Schema$Group>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Group>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Group>,
       callback?: BodyResponseCallback<Schema$Group>):
       void|AxiosPromise<Schema$Group> {
     if (typeof options === 'function') {
@@ -3682,12 +3690,12 @@ export class Resource$Groups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Group>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Group>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Group>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Group>,
       callback?: BodyResponseCallback<Schema$Group>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Group>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Group>,
       callback?: BodyResponseCallback<Schema$Group>):
       void|AxiosPromise<Schema$Group> {
     if (typeof options === 'function') {
@@ -3737,12 +3745,12 @@ export class Resource$Groups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Groups>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Groups>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Groups>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Groups>,
       callback?: BodyResponseCallback<Schema$Groups>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Groups>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Groups>,
       callback?: BodyResponseCallback<Schema$Groups>):
       void|AxiosPromise<Schema$Groups> {
     if (typeof options === 'function') {
@@ -3789,12 +3797,12 @@ export class Resource$Groups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Group>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Group>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Group>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Group>,
       callback?: BodyResponseCallback<Schema$Group>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Group>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Group>,
       callback?: BodyResponseCallback<Schema$Group>):
       void|AxiosPromise<Schema$Group> {
     if (typeof options === 'function') {
@@ -3841,12 +3849,12 @@ export class Resource$Groups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Group>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Group>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Group>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Group>,
       callback?: BodyResponseCallback<Schema$Group>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Group>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Group>,
       callback?: BodyResponseCallback<Schema$Group>):
       void|AxiosPromise<Schema$Group> {
     if (typeof options === 'function') {
@@ -3904,12 +3912,12 @@ export class Resource$Groups$Aliases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -3956,12 +3964,12 @@ export class Resource$Groups$Aliases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Alias>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Alias>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Alias>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Alias>,
       callback?: BodyResponseCallback<Schema$Alias>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Alias>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Alias>,
       callback?: BodyResponseCallback<Schema$Alias>):
       void|AxiosPromise<Schema$Alias> {
     if (typeof options === 'function') {
@@ -4007,12 +4015,14 @@ export class Resource$Groups$Aliases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Aliases>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Aliases>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Aliases>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Aliases>,
       callback?: BodyResponseCallback<Schema$Aliases>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Aliases>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Aliases>,
       callback?: BodyResponseCallback<Schema$Aliases>):
       void|AxiosPromise<Schema$Aliases> {
     if (typeof options === 'function') {
@@ -4072,12 +4082,12 @@ export class Resource$Members {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -4124,10 +4134,10 @@ export class Resource$Members {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Member>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Member>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Member>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Member>,
       callback?: BodyResponseCallback<Schema$Member>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Member>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Member>,
       callback?: BodyResponseCallback<Schema$Member>):
       void|AxiosPromise<Schema$Member> {
     if (typeof options === 'function') {
@@ -4176,14 +4186,14 @@ export class Resource$Members {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  hasMember(params: any, options?: MethodOptions):
+  hasMember(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$MembersHasMember>;
   hasMember(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$MembersHasMember>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$MembersHasMember>,
       callback?: BodyResponseCallback<Schema$MembersHasMember>): void;
   hasMember(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$MembersHasMember>,
       callback?: BodyResponseCallback<Schema$MembersHasMember>):
       void|AxiosPromise<Schema$MembersHasMember> {
@@ -4232,12 +4242,12 @@ export class Resource$Members {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Member>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Member>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Member>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Member>,
       callback?: BodyResponseCallback<Schema$Member>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Member>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Member>,
       callback?: BodyResponseCallback<Schema$Member>):
       void|AxiosPromise<Schema$Member> {
     if (typeof options === 'function') {
@@ -4286,12 +4296,14 @@ export class Resource$Members {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Members>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Members>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Members>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Members>,
       callback?: BodyResponseCallback<Schema$Members>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Members>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Members>,
       callback?: BodyResponseCallback<Schema$Members>):
       void|AxiosPromise<Schema$Members> {
     if (typeof options === 'function') {
@@ -4340,12 +4352,12 @@ export class Resource$Members {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Member>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Member>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Member>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Member>,
       callback?: BodyResponseCallback<Schema$Member>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Member>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Member>,
       callback?: BodyResponseCallback<Schema$Member>):
       void|AxiosPromise<Schema$Member> {
     if (typeof options === 'function') {
@@ -4394,12 +4406,12 @@ export class Resource$Members {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Member>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Member>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Member>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Member>,
       callback?: BodyResponseCallback<Schema$Member>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Member>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Member>,
       callback?: BodyResponseCallback<Schema$Member>):
       void|AxiosPromise<Schema$Member> {
     if (typeof options === 'function') {
@@ -4460,12 +4472,12 @@ export class Resource$Mobiledevices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  action(params: any, options?: MethodOptions): AxiosPromise<void>;
+  action(params?: any, options?: MethodOptions): AxiosPromise<void>;
   action(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   action(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -4513,12 +4525,12 @@ export class Resource$Mobiledevices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -4567,11 +4579,11 @@ export class Resource$Mobiledevices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$MobileDevice>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$MobileDevice>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$MobileDevice>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$MobileDevice>,
       callback?: BodyResponseCallback<Schema$MobileDevice>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$MobileDevice>,
       callback?: BodyResponseCallback<Schema$MobileDevice>):
       void|AxiosPromise<Schema$MobileDevice> {
@@ -4626,14 +4638,14 @@ export class Resource$Mobiledevices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$MobileDevices>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$MobileDevices>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$MobileDevices>,
       callback?: BodyResponseCallback<Schema$MobileDevices>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$MobileDevices>,
       callback?: BodyResponseCallback<Schema$MobileDevices>):
       void|AxiosPromise<Schema$MobileDevices> {
@@ -4694,12 +4706,12 @@ export class Resource$Notifications {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -4747,11 +4759,11 @@ export class Resource$Notifications {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Notification>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Notification>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Notification>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Notification>,
       callback?: BodyResponseCallback<Schema$Notification>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Notification>,
       callback?: BodyResponseCallback<Schema$Notification>):
       void|AxiosPromise<Schema$Notification> {
@@ -4803,14 +4815,14 @@ export class Resource$Notifications {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Notifications>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Notifications>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Notifications>,
       callback?: BodyResponseCallback<Schema$Notifications>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Notifications>,
       callback?: BodyResponseCallback<Schema$Notifications>):
       void|AxiosPromise<Schema$Notifications> {
@@ -4860,14 +4872,14 @@ export class Resource$Notifications {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Notification>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Notification>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Notification>,
       callback?: BodyResponseCallback<Schema$Notification>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Notification>,
       callback?: BodyResponseCallback<Schema$Notification>):
       void|AxiosPromise<Schema$Notification> {
@@ -4918,14 +4930,14 @@ export class Resource$Notifications {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Notification>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Notification>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Notification>,
       callback?: BodyResponseCallback<Schema$Notification>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Notification>,
       callback?: BodyResponseCallback<Schema$Notification>):
       void|AxiosPromise<Schema$Notification> {
@@ -4987,12 +4999,12 @@ export class Resource$Orgunits {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -5040,10 +5052,12 @@ export class Resource$Orgunits {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$OrgUnit>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$OrgUnit>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$OrgUnit>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OrgUnit>,
       callback?: BodyResponseCallback<Schema$OrgUnit>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$OrgUnit>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OrgUnit>,
       callback?: BodyResponseCallback<Schema$OrgUnit>):
       void|AxiosPromise<Schema$OrgUnit> {
     if (typeof options === 'function') {
@@ -5092,12 +5106,14 @@ export class Resource$Orgunits {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$OrgUnit>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$OrgUnit>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$OrgUnit>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OrgUnit>,
       callback?: BodyResponseCallback<Schema$OrgUnit>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$OrgUnit>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OrgUnit>,
       callback?: BodyResponseCallback<Schema$OrgUnit>):
       void|AxiosPromise<Schema$OrgUnit> {
     if (typeof options === 'function') {
@@ -5146,12 +5162,13 @@ export class Resource$Orgunits {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$OrgUnits>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$OrgUnits>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$OrgUnits>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OrgUnits>,
       callback?: BodyResponseCallback<Schema$OrgUnits>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$OrgUnits>,
       callback?: BodyResponseCallback<Schema$OrgUnits>):
       void|AxiosPromise<Schema$OrgUnits> {
@@ -5201,12 +5218,14 @@ export class Resource$Orgunits {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$OrgUnit>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$OrgUnit>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$OrgUnit>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OrgUnit>,
       callback?: BodyResponseCallback<Schema$OrgUnit>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$OrgUnit>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OrgUnit>,
       callback?: BodyResponseCallback<Schema$OrgUnit>):
       void|AxiosPromise<Schema$OrgUnit> {
     if (typeof options === 'function') {
@@ -5256,12 +5275,14 @@ export class Resource$Orgunits {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$OrgUnit>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$OrgUnit>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$OrgUnit>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OrgUnit>,
       callback?: BodyResponseCallback<Schema$OrgUnit>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$OrgUnit>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OrgUnit>,
       callback?: BodyResponseCallback<Schema$OrgUnit>):
       void|AxiosPromise<Schema$OrgUnit> {
     if (typeof options === 'function') {
@@ -5321,13 +5342,13 @@ export class Resource$Privileges {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Privileges>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Privileges>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Privileges>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Privileges>,
       callback?: BodyResponseCallback<Schema$Privileges>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Privileges>,
       callback?: BodyResponseCallback<Schema$Privileges>):
       void|AxiosPromise<Schema$Privileges> {
@@ -5387,14 +5408,14 @@ export class Resource$Resolvedappaccesssettings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  GetSettings(params: any, options?: MethodOptions):
+  GetSettings(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AppAccessCollections>;
   GetSettings(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AppAccessCollections>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AppAccessCollections>,
       callback?: BodyResponseCallback<Schema$AppAccessCollections>): void;
   GetSettings(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AppAccessCollections>,
       callback?: BodyResponseCallback<Schema$AppAccessCollections>):
       void|AxiosPromise<Schema$AppAccessCollections> {
@@ -5441,14 +5462,14 @@ export class Resource$Resolvedappaccesssettings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  ListTrustedApps(params: any, options?: MethodOptions):
+  ListTrustedApps(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TrustedApps>;
   ListTrustedApps(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TrustedApps>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TrustedApps>,
       callback?: BodyResponseCallback<Schema$TrustedApps>): void;
   ListTrustedApps(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TrustedApps>,
       callback?: BodyResponseCallback<Schema$TrustedApps>):
       void|AxiosPromise<Schema$TrustedApps> {
@@ -5525,12 +5546,12 @@ export class Resource$Resources$Buildings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -5578,10 +5599,11 @@ export class Resource$Resources$Buildings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Building>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Building>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Building>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Building>,
       callback?: BodyResponseCallback<Schema$Building>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Building>,
       callback?: BodyResponseCallback<Schema$Building>):
       void|AxiosPromise<Schema$Building> {
@@ -5631,12 +5653,13 @@ export class Resource$Resources$Buildings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Building>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Building>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Building>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Building>,
       callback?: BodyResponseCallback<Schema$Building>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Building>,
       callback?: BodyResponseCallback<Schema$Building>):
       void|AxiosPromise<Schema$Building> {
@@ -5686,13 +5709,13 @@ export class Resource$Resources$Buildings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Buildings>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Buildings>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Buildings>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Buildings>,
       callback?: BodyResponseCallback<Schema$Buildings>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Buildings>,
       callback?: BodyResponseCallback<Schema$Buildings>):
       void|AxiosPromise<Schema$Buildings> {
@@ -5742,12 +5765,13 @@ export class Resource$Resources$Buildings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Building>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Building>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Building>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Building>,
       callback?: BodyResponseCallback<Schema$Building>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Building>,
       callback?: BodyResponseCallback<Schema$Building>):
       void|AxiosPromise<Schema$Building> {
@@ -5798,12 +5822,13 @@ export class Resource$Resources$Buildings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Building>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Building>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Building>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Building>,
       callback?: BodyResponseCallback<Schema$Building>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Building>,
       callback?: BodyResponseCallback<Schema$Building>):
       void|AxiosPromise<Schema$Building> {
@@ -5865,12 +5890,12 @@ export class Resource$Resources$Calendars {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -5918,12 +5943,12 @@ export class Resource$Resources$Calendars {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$CalendarResource>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CalendarResource>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CalendarResource>,
       callback?: BodyResponseCallback<Schema$CalendarResource>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CalendarResource>,
       callback?: BodyResponseCallback<Schema$CalendarResource>):
       void|AxiosPromise<Schema$CalendarResource> {
@@ -5973,14 +5998,14 @@ export class Resource$Resources$Calendars {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CalendarResource>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CalendarResource>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CalendarResource>,
       callback?: BodyResponseCallback<Schema$CalendarResource>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CalendarResource>,
       callback?: BodyResponseCallback<Schema$CalendarResource>):
       void|AxiosPromise<Schema$CalendarResource> {
@@ -6032,14 +6057,14 @@ export class Resource$Resources$Calendars {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CalendarResources>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CalendarResources>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CalendarResources>,
       callback?: BodyResponseCallback<Schema$CalendarResources>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CalendarResources>,
       callback?: BodyResponseCallback<Schema$CalendarResources>):
       void|AxiosPromise<Schema$CalendarResources> {
@@ -6092,14 +6117,14 @@ export class Resource$Resources$Calendars {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CalendarResource>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CalendarResource>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CalendarResource>,
       callback?: BodyResponseCallback<Schema$CalendarResource>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CalendarResource>,
       callback?: BodyResponseCallback<Schema$CalendarResource>):
       void|AxiosPromise<Schema$CalendarResource> {
@@ -6152,14 +6177,14 @@ export class Resource$Resources$Calendars {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CalendarResource>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CalendarResource>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CalendarResource>,
       callback?: BodyResponseCallback<Schema$CalendarResource>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CalendarResource>,
       callback?: BodyResponseCallback<Schema$CalendarResource>):
       void|AxiosPromise<Schema$CalendarResource> {
@@ -6221,12 +6246,12 @@ export class Resource$Resources$Features {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -6274,10 +6299,12 @@ export class Resource$Resources$Features {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Feature>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Feature>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Feature>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Feature>,
       callback?: BodyResponseCallback<Schema$Feature>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Feature>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Feature>,
       callback?: BodyResponseCallback<Schema$Feature>):
       void|AxiosPromise<Schema$Feature> {
     if (typeof options === 'function') {
@@ -6326,12 +6353,14 @@ export class Resource$Resources$Features {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Feature>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Feature>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Feature>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Feature>,
       callback?: BodyResponseCallback<Schema$Feature>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Feature>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Feature>,
       callback?: BodyResponseCallback<Schema$Feature>):
       void|AxiosPromise<Schema$Feature> {
     if (typeof options === 'function') {
@@ -6380,12 +6409,13 @@ export class Resource$Resources$Features {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Features>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Features>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Features>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Features>,
       callback?: BodyResponseCallback<Schema$Features>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Features>,
       callback?: BodyResponseCallback<Schema$Features>):
       void|AxiosPromise<Schema$Features> {
@@ -6435,12 +6465,14 @@ export class Resource$Resources$Features {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Feature>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Feature>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Feature>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Feature>,
       callback?: BodyResponseCallback<Schema$Feature>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Feature>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Feature>,
       callback?: BodyResponseCallback<Schema$Feature>):
       void|AxiosPromise<Schema$Feature> {
     if (typeof options === 'function') {
@@ -6490,12 +6522,12 @@ export class Resource$Resources$Features {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  rename(params: any, options?: MethodOptions): AxiosPromise<void>;
+  rename(params?: any, options?: MethodOptions): AxiosPromise<void>;
   rename(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   rename(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -6544,12 +6576,14 @@ export class Resource$Resources$Features {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Feature>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Feature>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Feature>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Feature>,
       callback?: BodyResponseCallback<Schema$Feature>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Feature>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Feature>,
       callback?: BodyResponseCallback<Schema$Feature>):
       void|AxiosPromise<Schema$Feature> {
     if (typeof options === 'function') {
@@ -6611,12 +6645,12 @@ export class Resource$Roleassignments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -6664,12 +6698,12 @@ export class Resource$Roleassignments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$RoleAssignment>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RoleAssignment>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RoleAssignment>,
       callback?: BodyResponseCallback<Schema$RoleAssignment>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RoleAssignment>,
       callback?: BodyResponseCallback<Schema$RoleAssignment>):
       void|AxiosPromise<Schema$RoleAssignment> {
@@ -6719,14 +6753,14 @@ export class Resource$Roleassignments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RoleAssignment>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RoleAssignment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RoleAssignment>,
       callback?: BodyResponseCallback<Schema$RoleAssignment>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RoleAssignment>,
       callback?: BodyResponseCallback<Schema$RoleAssignment>):
       void|AxiosPromise<Schema$RoleAssignment> {
@@ -6778,14 +6812,14 @@ export class Resource$Roleassignments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RoleAssignments>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RoleAssignments>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RoleAssignments>,
       callback?: BodyResponseCallback<Schema$RoleAssignments>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RoleAssignments>,
       callback?: BodyResponseCallback<Schema$RoleAssignments>):
       void|AxiosPromise<Schema$RoleAssignments> {
@@ -6846,12 +6880,12 @@ export class Resource$Roles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -6898,10 +6932,10 @@ export class Resource$Roles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Role>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Role>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Role>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
       callback?: BodyResponseCallback<Schema$Role>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
       callback?: BodyResponseCallback<Schema$Role>):
       void|AxiosPromise<Schema$Role> {
     if (typeof options === 'function') {
@@ -6949,12 +6983,12 @@ export class Resource$Roles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Role>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Role>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Role>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
       callback?: BodyResponseCallback<Schema$Role>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
       callback?: BodyResponseCallback<Schema$Role>):
       void|AxiosPromise<Schema$Role> {
     if (typeof options === 'function') {
@@ -7002,12 +7036,12 @@ export class Resource$Roles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Roles>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Roles>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Roles>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Roles>,
       callback?: BodyResponseCallback<Schema$Roles>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Roles>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Roles>,
       callback?: BodyResponseCallback<Schema$Roles>):
       void|AxiosPromise<Schema$Roles> {
     if (typeof options === 'function') {
@@ -7055,12 +7089,12 @@ export class Resource$Roles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Role>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Role>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Role>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
       callback?: BodyResponseCallback<Schema$Role>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
       callback?: BodyResponseCallback<Schema$Role>):
       void|AxiosPromise<Schema$Role> {
     if (typeof options === 'function') {
@@ -7109,12 +7143,12 @@ export class Resource$Roles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Role>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Role>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Role>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
       callback?: BodyResponseCallback<Schema$Role>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
       callback?: BodyResponseCallback<Schema$Role>):
       void|AxiosPromise<Schema$Role> {
     if (typeof options === 'function') {
@@ -7174,12 +7208,12 @@ export class Resource$Schemas {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -7227,10 +7261,10 @@ export class Resource$Schemas {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Schema>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Schema>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Schema>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Schema>,
       callback?: BodyResponseCallback<Schema$Schema>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Schema>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Schema>,
       callback?: BodyResponseCallback<Schema$Schema>):
       void|AxiosPromise<Schema$Schema> {
     if (typeof options === 'function') {
@@ -7279,12 +7313,12 @@ export class Resource$Schemas {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Schema>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Schema>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Schema>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Schema>,
       callback?: BodyResponseCallback<Schema$Schema>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Schema>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Schema>,
       callback?: BodyResponseCallback<Schema$Schema>):
       void|AxiosPromise<Schema$Schema> {
     if (typeof options === 'function') {
@@ -7330,12 +7364,14 @@ export class Resource$Schemas {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Schemas>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Schemas>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Schemas>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Schemas>,
       callback?: BodyResponseCallback<Schema$Schemas>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Schemas>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Schemas>,
       callback?: BodyResponseCallback<Schema$Schemas>):
       void|AxiosPromise<Schema$Schemas> {
     if (typeof options === 'function') {
@@ -7383,12 +7419,12 @@ export class Resource$Schemas {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Schema>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Schema>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Schema>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Schema>,
       callback?: BodyResponseCallback<Schema$Schema>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Schema>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Schema>,
       callback?: BodyResponseCallback<Schema$Schema>):
       void|AxiosPromise<Schema$Schema> {
     if (typeof options === 'function') {
@@ -7438,12 +7474,12 @@ export class Resource$Schemas {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Schema>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Schema>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Schema>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Schema>,
       callback?: BodyResponseCallback<Schema$Schema>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Schema>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Schema>,
       callback?: BodyResponseCallback<Schema$Schema>):
       void|AxiosPromise<Schema$Schema> {
     if (typeof options === 'function') {
@@ -7504,12 +7540,12 @@ export class Resource$Tokens {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -7556,10 +7592,10 @@ export class Resource$Tokens {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Token>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Token>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Token>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Token>,
       callback?: BodyResponseCallback<Schema$Token>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Token>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Token>,
       callback?: BodyResponseCallback<Schema$Token>):
       void|AxiosPromise<Schema$Token> {
     if (typeof options === 'function') {
@@ -7607,12 +7643,12 @@ export class Resource$Tokens {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Tokens>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Tokens>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Tokens>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Tokens>,
       callback?: BodyResponseCallback<Schema$Tokens>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Tokens>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Tokens>,
       callback?: BodyResponseCallback<Schema$Tokens>):
       void|AxiosPromise<Schema$Tokens> {
     if (typeof options === 'function') {
@@ -7674,12 +7710,12 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -7727,10 +7763,10 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$User>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$User>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$User>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$User>,
       callback?: BodyResponseCallback<Schema$User>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$User>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$User>,
       callback?: BodyResponseCallback<Schema$User>):
       void|AxiosPromise<Schema$User> {
     if (typeof options === 'function') {
@@ -7776,12 +7812,12 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$User>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$User>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$User>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$User>,
       callback?: BodyResponseCallback<Schema$User>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$User>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$User>,
       callback?: BodyResponseCallback<Schema$User>):
       void|AxiosPromise<Schema$User> {
     if (typeof options === 'function') {
@@ -7838,12 +7874,12 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Users>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Users>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Users>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Users>,
       callback?: BodyResponseCallback<Schema$Users>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Users>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Users>,
       callback?: BodyResponseCallback<Schema$Users>):
       void|AxiosPromise<Schema$Users> {
     if (typeof options === 'function') {
@@ -7890,12 +7926,12 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  makeAdmin(params: any, options?: MethodOptions): AxiosPromise<void>;
+  makeAdmin(params?: any, options?: MethodOptions): AxiosPromise<void>;
   makeAdmin(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   makeAdmin(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -7941,12 +7977,12 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$User>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$User>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$User>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$User>,
       callback?: BodyResponseCallback<Schema$User>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$User>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$User>,
       callback?: BodyResponseCallback<Schema$User>):
       void|AxiosPromise<Schema$User> {
     if (typeof options === 'function') {
@@ -7993,12 +8029,12 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  undelete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  undelete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   undelete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   undelete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -8044,12 +8080,12 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$User>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$User>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$User>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$User>,
       callback?: BodyResponseCallback<Schema$User>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$User>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$User>,
       callback?: BodyResponseCallback<Schema$User>):
       void|AxiosPromise<Schema$User> {
     if (typeof options === 'function') {
@@ -8107,12 +8143,14 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  watch(params: any, options?: MethodOptions): AxiosPromise<Schema$Channel>;
+  watch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Channel>;
   watch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Channel>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
       callback?: BodyResponseCallback<Schema$Channel>): void;
   watch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
       callback?: BodyResponseCallback<Schema$Channel>):
       void|AxiosPromise<Schema$Channel> {
     if (typeof options === 'function') {
@@ -8170,12 +8208,12 @@ export class Resource$Users$Aliases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -8222,12 +8260,12 @@ export class Resource$Users$Aliases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Alias>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Alias>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Alias>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Alias>,
       callback?: BodyResponseCallback<Schema$Alias>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Alias>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Alias>,
       callback?: BodyResponseCallback<Schema$Alias>):
       void|AxiosPromise<Schema$Alias> {
     if (typeof options === 'function') {
@@ -8274,12 +8312,14 @@ export class Resource$Users$Aliases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Aliases>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Aliases>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Aliases>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Aliases>,
       callback?: BodyResponseCallback<Schema$Aliases>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Aliases>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Aliases>,
       callback?: BodyResponseCallback<Schema$Aliases>):
       void|AxiosPromise<Schema$Aliases> {
     if (typeof options === 'function') {
@@ -8327,12 +8367,14 @@ export class Resource$Users$Aliases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  watch(params: any, options?: MethodOptions): AxiosPromise<Schema$Channel>;
+  watch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Channel>;
   watch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Channel>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
       callback?: BodyResponseCallback<Schema$Channel>): void;
   watch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
       callback?: BodyResponseCallback<Schema$Channel>):
       void|AxiosPromise<Schema$Channel> {
     if (typeof options === 'function') {
@@ -8390,12 +8432,12 @@ export class Resource$Users$Photos {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -8441,11 +8483,11 @@ export class Resource$Users$Photos {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$UserPhoto>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UserPhoto>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$UserPhoto>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UserPhoto>,
       callback?: BodyResponseCallback<Schema$UserPhoto>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UserPhoto>,
       callback?: BodyResponseCallback<Schema$UserPhoto>):
       void|AxiosPromise<Schema$UserPhoto> {
@@ -8494,13 +8536,13 @@ export class Resource$Users$Photos {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$UserPhoto>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$UserPhoto>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UserPhoto>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UserPhoto>,
       callback?: BodyResponseCallback<Schema$UserPhoto>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UserPhoto>,
       callback?: BodyResponseCallback<Schema$UserPhoto>):
       void|AxiosPromise<Schema$UserPhoto> {
@@ -8549,13 +8591,13 @@ export class Resource$Users$Photos {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$UserPhoto>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$UserPhoto>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UserPhoto>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UserPhoto>,
       callback?: BodyResponseCallback<Schema$UserPhoto>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UserPhoto>,
       callback?: BodyResponseCallback<Schema$UserPhoto>):
       void|AxiosPromise<Schema$UserPhoto> {
@@ -8616,12 +8658,12 @@ export class Resource$Verificationcodes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  generate(params: any, options?: MethodOptions): AxiosPromise<void>;
+  generate(params?: any, options?: MethodOptions): AxiosPromise<void>;
   generate(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   generate(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -8668,12 +8710,12 @@ export class Resource$Verificationcodes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  invalidate(params: any, options?: MethodOptions): AxiosPromise<void>;
+  invalidate(params?: any, options?: MethodOptions): AxiosPromise<void>;
   invalidate(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   invalidate(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -8721,14 +8763,14 @@ export class Resource$Verificationcodes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$VerificationCodes>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$VerificationCodes>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$VerificationCodes>,
       callback?: BodyResponseCallback<Schema$VerificationCodes>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$VerificationCodes>,
       callback?: BodyResponseCallback<Schema$VerificationCodes>):
       void|AxiosPromise<Schema$VerificationCodes> {
diff --git a/src/apis/admin/reports_v1.ts b/src/apis/admin/reports_v1.ts
index e3c1f08377..69cf8fb019 100644
--- a/src/apis/admin/reports_v1.ts
+++ b/src/apis/admin/reports_v1.ts
@@ -260,13 +260,13 @@ export class Resource$Activities {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Activities>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Activities>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Activities>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Activities>,
       callback?: BodyResponseCallback<Schema$Activities>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Activities>,
       callback?: BodyResponseCallback<Schema$Activities>):
       void|AxiosPromise<Schema$Activities> {
@@ -325,12 +325,14 @@ export class Resource$Activities {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  watch(params: any, options?: MethodOptions): AxiosPromise<Schema$Channel>;
+  watch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Channel>;
   watch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Channel>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
       callback?: BodyResponseCallback<Schema$Channel>): void;
   watch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
       callback?: BodyResponseCallback<Schema$Channel>):
       void|AxiosPromise<Schema$Channel> {
     if (typeof options === 'function') {
@@ -390,12 +392,12 @@ export class Resource$Channels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  stop(params: any, options?: MethodOptions): AxiosPromise<void>;
+  stop(params?: any, options?: MethodOptions): AxiosPromise<void>;
   stop(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   stop(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -456,11 +458,11 @@ export class Resource$Customerusagereports {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$UsageReports>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UsageReports>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$UsageReports>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UsageReports>,
       callback?: BodyResponseCallback<Schema$UsageReports>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UsageReports>,
       callback?: BodyResponseCallback<Schema$UsageReports>):
       void|AxiosPromise<Schema$UsageReports> {
@@ -527,11 +529,11 @@ export class Resource$Entityusagereports {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$UsageReports>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UsageReports>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$UsageReports>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UsageReports>,
       callback?: BodyResponseCallback<Schema$UsageReports>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UsageReports>,
       callback?: BodyResponseCallback<Schema$UsageReports>):
       void|AxiosPromise<Schema$UsageReports> {
@@ -599,11 +601,11 @@ export class Resource$Userusagereport {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$UsageReports>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UsageReports>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$UsageReports>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UsageReports>,
       callback?: BodyResponseCallback<Schema$UsageReports>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UsageReports>,
       callback?: BodyResponseCallback<Schema$UsageReports>):
       void|AxiosPromise<Schema$UsageReports> {
diff --git a/src/apis/adsense/v1.4.ts b/src/apis/adsense/v1.4.ts
index c6f04b7bcf..1e79af4a13 100644
--- a/src/apis/adsense/v1.4.ts
+++ b/src/apis/adsense/v1.4.ts
@@ -629,10 +629,12 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Account>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Account>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>):
       void|AxiosPromise<Schema$Account> {
     if (typeof options === 'function') {
@@ -679,12 +681,13 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Accounts>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Accounts>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Accounts>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Accounts>,
       callback?: BodyResponseCallback<Schema$Accounts>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Accounts>,
       callback?: BodyResponseCallback<Schema$Accounts>):
       void|AxiosPromise<Schema$Accounts> {
@@ -744,13 +747,13 @@ export class Resource$Accounts$Adclients {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$AdClients>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$AdClients>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AdClients>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AdClients>,
       callback?: BodyResponseCallback<Schema$AdClients>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AdClients>,
       callback?: BodyResponseCallback<Schema$AdClients>):
       void|AxiosPromise<Schema$AdClients> {
@@ -814,10 +817,10 @@ export class Resource$Accounts$Adunits {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$AdUnit>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$AdUnit>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$AdUnit>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$AdUnit>,
       callback?: BodyResponseCallback<Schema$AdUnit>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$AdUnit>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$AdUnit>,
       callback?: BodyResponseCallback<Schema$AdUnit>):
       void|AxiosPromise<Schema$AdUnit> {
     if (typeof options === 'function') {
@@ -867,12 +870,12 @@ export class Resource$Accounts$Adunits {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getAdCode(params: any, options?: MethodOptions): AxiosPromise<Schema$AdCode>;
+  getAdCode(params?: any, options?: MethodOptions): AxiosPromise<Schema$AdCode>;
   getAdCode(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$AdCode>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$AdCode>,
       callback?: BodyResponseCallback<Schema$AdCode>): void;
   getAdCode(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$AdCode>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$AdCode>,
       callback?: BodyResponseCallback<Schema$AdCode>):
       void|AxiosPromise<Schema$AdCode> {
     if (typeof options === 'function') {
@@ -925,12 +928,14 @@ export class Resource$Accounts$Adunits {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$AdUnits>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$AdUnits>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$AdUnits>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AdUnits>,
       callback?: BodyResponseCallback<Schema$AdUnits>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$AdUnits>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AdUnits>,
       callback?: BodyResponseCallback<Schema$AdUnits>):
       void|AxiosPromise<Schema$AdUnits> {
     if (typeof options === 'function') {
@@ -993,14 +998,14 @@ export class Resource$Accounts$Adunits$Customchannels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CustomChannels>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CustomChannels>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CustomChannels>,
       callback?: BodyResponseCallback<Schema$CustomChannels>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CustomChannels>,
       callback?: BodyResponseCallback<Schema$CustomChannels>):
       void|AxiosPromise<Schema$CustomChannels> {
@@ -1064,12 +1069,12 @@ export class Resource$Accounts$Alerts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1116,12 +1121,12 @@ export class Resource$Accounts$Alerts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Alerts>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Alerts>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Alerts>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Alerts>,
       callback?: BodyResponseCallback<Schema$Alerts>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Alerts>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Alerts>,
       callback?: BodyResponseCallback<Schema$Alerts>):
       void|AxiosPromise<Schema$Alerts> {
     if (typeof options === 'function') {
@@ -1184,11 +1189,12 @@ export class Resource$Accounts$Customchannels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$CustomChannel>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CustomChannel>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$CustomChannel>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CustomChannel>,
       callback?: BodyResponseCallback<Schema$CustomChannel>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CustomChannel>,
       callback?: BodyResponseCallback<Schema$CustomChannel>):
       void|AxiosPromise<Schema$CustomChannel> {
@@ -1241,14 +1247,14 @@ export class Resource$Accounts$Customchannels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CustomChannels>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CustomChannels>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CustomChannels>,
       callback?: BodyResponseCallback<Schema$CustomChannels>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CustomChannels>,
       callback?: BodyResponseCallback<Schema$CustomChannels>):
       void|AxiosPromise<Schema$CustomChannels> {
@@ -1313,12 +1319,14 @@ export class Resource$Accounts$Customchannels$Adunits {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$AdUnits>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$AdUnits>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$AdUnits>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AdUnits>,
       callback?: BodyResponseCallback<Schema$AdUnits>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$AdUnits>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AdUnits>,
       callback?: BodyResponseCallback<Schema$AdUnits>):
       void|AxiosPromise<Schema$AdUnits> {
     if (typeof options === 'function') {
@@ -1379,12 +1387,13 @@ export class Resource$Accounts$Payments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Payments>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Payments>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Payments>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Payments>,
       callback?: BodyResponseCallback<Schema$Payments>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Payments>,
       callback?: BodyResponseCallback<Schema$Payments>):
       void|AxiosPromise<Schema$Payments> {
@@ -1458,16 +1467,16 @@ export class Resource$Accounts$Reports {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  generate(params: any, options?: MethodOptions):
+  generate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AdsenseReportsGenerateResponse>;
   generate(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AdsenseReportsGenerateResponse>,
       callback?: BodyResponseCallback<Schema$AdsenseReportsGenerateResponse>):
       void;
   generate(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AdsenseReportsGenerateResponse>,
       callback?: BodyResponseCallback<Schema$AdsenseReportsGenerateResponse>):
@@ -1533,16 +1542,16 @@ export class Resource$Accounts$Reports$Saved {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  generate(params: any, options?: MethodOptions):
+  generate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AdsenseReportsGenerateResponse>;
   generate(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AdsenseReportsGenerateResponse>,
       callback?: BodyResponseCallback<Schema$AdsenseReportsGenerateResponse>):
       void;
   generate(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AdsenseReportsGenerateResponse>,
       callback?: BodyResponseCallback<Schema$AdsenseReportsGenerateResponse>):
@@ -1595,13 +1604,14 @@ export class Resource$Accounts$Reports$Saved {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$SavedReports>;
+  list(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$SavedReports>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SavedReports>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SavedReports>,
       callback?: BodyResponseCallback<Schema$SavedReports>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SavedReports>,
       callback?: BodyResponseCallback<Schema$SavedReports>):
       void|AxiosPromise<Schema$SavedReports> {
@@ -1662,11 +1672,11 @@ export class Resource$Accounts$Savedadstyles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$SavedAdStyle>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SavedAdStyle>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$SavedAdStyle>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SavedAdStyle>,
       callback?: BodyResponseCallback<Schema$SavedAdStyle>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SavedAdStyle>,
       callback?: BodyResponseCallback<Schema$SavedAdStyle>):
       void|AxiosPromise<Schema$SavedAdStyle> {
@@ -1717,14 +1727,14 @@ export class Resource$Accounts$Savedadstyles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SavedAdStyles>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SavedAdStyles>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SavedAdStyles>,
       callback?: BodyResponseCallback<Schema$SavedAdStyles>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SavedAdStyles>,
       callback?: BodyResponseCallback<Schema$SavedAdStyles>):
       void|AxiosPromise<Schema$SavedAdStyles> {
@@ -1787,13 +1797,13 @@ export class Resource$Accounts$Urlchannels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$UrlChannels>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$UrlChannels>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UrlChannels>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UrlChannels>,
       callback?: BodyResponseCallback<Schema$UrlChannels>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UrlChannels>,
       callback?: BodyResponseCallback<Schema$UrlChannels>):
       void|AxiosPromise<Schema$UrlChannels> {
@@ -1856,13 +1866,13 @@ export class Resource$Adclients {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$AdClients>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$AdClients>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AdClients>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AdClients>,
       callback?: BodyResponseCallback<Schema$AdClients>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AdClients>,
       callback?: BodyResponseCallback<Schema$AdClients>):
       void|AxiosPromise<Schema$AdClients> {
@@ -1924,10 +1934,10 @@ export class Resource$Adunits {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$AdUnit>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$AdUnit>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$AdUnit>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$AdUnit>,
       callback?: BodyResponseCallback<Schema$AdUnit>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$AdUnit>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$AdUnit>,
       callback?: BodyResponseCallback<Schema$AdUnit>):
       void|AxiosPromise<Schema$AdUnit> {
     if (typeof options === 'function') {
@@ -1975,12 +1985,12 @@ export class Resource$Adunits {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getAdCode(params: any, options?: MethodOptions): AxiosPromise<Schema$AdCode>;
+  getAdCode(params?: any, options?: MethodOptions): AxiosPromise<Schema$AdCode>;
   getAdCode(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$AdCode>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$AdCode>,
       callback?: BodyResponseCallback<Schema$AdCode>): void;
   getAdCode(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$AdCode>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$AdCode>,
       callback?: BodyResponseCallback<Schema$AdCode>):
       void|AxiosPromise<Schema$AdCode> {
     if (typeof options === 'function') {
@@ -2032,12 +2042,14 @@ export class Resource$Adunits {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$AdUnits>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$AdUnits>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$AdUnits>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AdUnits>,
       callback?: BodyResponseCallback<Schema$AdUnits>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$AdUnits>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AdUnits>,
       callback?: BodyResponseCallback<Schema$AdUnits>):
       void|AxiosPromise<Schema$AdUnits> {
     if (typeof options === 'function') {
@@ -2097,14 +2109,14 @@ export class Resource$Adunits$Customchannels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CustomChannels>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CustomChannels>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CustomChannels>,
       callback?: BodyResponseCallback<Schema$CustomChannels>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CustomChannels>,
       callback?: BodyResponseCallback<Schema$CustomChannels>):
       void|AxiosPromise<Schema$CustomChannels> {
@@ -2167,12 +2179,12 @@ export class Resource$Alerts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2217,12 +2229,12 @@ export class Resource$Alerts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Alerts>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Alerts>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Alerts>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Alerts>,
       callback?: BodyResponseCallback<Schema$Alerts>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Alerts>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Alerts>,
       callback?: BodyResponseCallback<Schema$Alerts>):
       void|AxiosPromise<Schema$Alerts> {
     if (typeof options === 'function') {
@@ -2283,11 +2295,12 @@ export class Resource$Customchannels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$CustomChannel>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CustomChannel>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$CustomChannel>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CustomChannel>,
       callback?: BodyResponseCallback<Schema$CustomChannel>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CustomChannel>,
       callback?: BodyResponseCallback<Schema$CustomChannel>):
       void|AxiosPromise<Schema$CustomChannel> {
@@ -2339,14 +2352,14 @@ export class Resource$Customchannels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CustomChannels>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CustomChannels>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CustomChannels>,
       callback?: BodyResponseCallback<Schema$CustomChannels>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CustomChannels>,
       callback?: BodyResponseCallback<Schema$CustomChannels>):
       void|AxiosPromise<Schema$CustomChannels> {
@@ -2409,12 +2422,14 @@ export class Resource$Customchannels$Adunits {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$AdUnits>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$AdUnits>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$AdUnits>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AdUnits>,
       callback?: BodyResponseCallback<Schema$AdUnits>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$AdUnits>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AdUnits>,
       callback?: BodyResponseCallback<Schema$AdUnits>):
       void|AxiosPromise<Schema$AdUnits> {
     if (typeof options === 'function') {
@@ -2490,12 +2505,13 @@ export class Resource$Metadata$Dimensions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Metadata>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Metadata>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Metadata>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Metadata>,
       callback?: BodyResponseCallback<Schema$Metadata>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Metadata>,
       callback?: BodyResponseCallback<Schema$Metadata>):
       void|AxiosPromise<Schema$Metadata> {
@@ -2553,12 +2569,13 @@ export class Resource$Metadata$Metrics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Metadata>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Metadata>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Metadata>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Metadata>,
       callback?: BodyResponseCallback<Schema$Metadata>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Metadata>,
       callback?: BodyResponseCallback<Schema$Metadata>):
       void|AxiosPromise<Schema$Metadata> {
@@ -2617,12 +2634,13 @@ export class Resource$Payments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Payments>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Payments>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Payments>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Payments>,
       callback?: BodyResponseCallback<Schema$Payments>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Payments>,
       callback?: BodyResponseCallback<Schema$Payments>):
       void|AxiosPromise<Schema$Payments> {
@@ -2696,16 +2714,16 @@ export class Resource$Reports {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  generate(params: any, options?: MethodOptions):
+  generate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AdsenseReportsGenerateResponse>;
   generate(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AdsenseReportsGenerateResponse>,
       callback?: BodyResponseCallback<Schema$AdsenseReportsGenerateResponse>):
       void;
   generate(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AdsenseReportsGenerateResponse>,
       callback?: BodyResponseCallback<Schema$AdsenseReportsGenerateResponse>):
@@ -2770,16 +2788,16 @@ export class Resource$Reports$Saved {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  generate(params: any, options?: MethodOptions):
+  generate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AdsenseReportsGenerateResponse>;
   generate(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AdsenseReportsGenerateResponse>,
       callback?: BodyResponseCallback<Schema$AdsenseReportsGenerateResponse>):
       void;
   generate(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AdsenseReportsGenerateResponse>,
       callback?: BodyResponseCallback<Schema$AdsenseReportsGenerateResponse>):
@@ -2830,13 +2848,14 @@ export class Resource$Reports$Saved {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$SavedReports>;
+  list(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$SavedReports>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SavedReports>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SavedReports>,
       callback?: BodyResponseCallback<Schema$SavedReports>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SavedReports>,
       callback?: BodyResponseCallback<Schema$SavedReports>):
       void|AxiosPromise<Schema$SavedReports> {
@@ -2896,11 +2915,11 @@ export class Resource$Savedadstyles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$SavedAdStyle>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SavedAdStyle>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$SavedAdStyle>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SavedAdStyle>,
       callback?: BodyResponseCallback<Schema$SavedAdStyle>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SavedAdStyle>,
       callback?: BodyResponseCallback<Schema$SavedAdStyle>):
       void|AxiosPromise<Schema$SavedAdStyle> {
@@ -2948,14 +2967,14 @@ export class Resource$Savedadstyles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SavedAdStyles>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SavedAdStyles>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SavedAdStyles>,
       callback?: BodyResponseCallback<Schema$SavedAdStyles>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SavedAdStyles>,
       callback?: BodyResponseCallback<Schema$SavedAdStyles>):
       void|AxiosPromise<Schema$SavedAdStyles> {
@@ -3017,13 +3036,13 @@ export class Resource$Urlchannels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$UrlChannels>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$UrlChannels>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UrlChannels>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UrlChannels>,
       callback?: BodyResponseCallback<Schema$UrlChannels>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UrlChannels>,
       callback?: BodyResponseCallback<Schema$UrlChannels>):
       void|AxiosPromise<Schema$UrlChannels> {
diff --git a/src/apis/adsensehost/v4.1.ts b/src/apis/adsensehost/v4.1.ts
index b72669dc22..f646e16f21 100644
--- a/src/apis/adsensehost/v4.1.ts
+++ b/src/apis/adsensehost/v4.1.ts
@@ -425,10 +425,12 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Account>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Account>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>):
       void|AxiosPromise<Schema$Account> {
     if (typeof options === 'function') {
@@ -475,12 +477,13 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Accounts>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Accounts>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Accounts>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Accounts>,
       callback?: BodyResponseCallback<Schema$Accounts>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Accounts>,
       callback?: BodyResponseCallback<Schema$Accounts>):
       void|AxiosPromise<Schema$Accounts> {
@@ -540,10 +543,11 @@ export class Resource$Accounts$Adclients {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$AdClient>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$AdClient>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$AdClient>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AdClient>,
       callback?: BodyResponseCallback<Schema$AdClient>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AdClient>,
       callback?: BodyResponseCallback<Schema$AdClient>):
       void|AxiosPromise<Schema$AdClient> {
@@ -594,13 +598,13 @@ export class Resource$Accounts$Adclients {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$AdClients>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$AdClients>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AdClients>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AdClients>,
       callback?: BodyResponseCallback<Schema$AdClients>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AdClients>,
       callback?: BodyResponseCallback<Schema$AdClients>):
       void|AxiosPromise<Schema$AdClients> {
@@ -662,12 +666,12 @@ export class Resource$Accounts$Adunits {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$AdUnit>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$AdUnit>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$AdUnit>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$AdUnit>,
       callback?: BodyResponseCallback<Schema$AdUnit>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$AdUnit>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$AdUnit>,
       callback?: BodyResponseCallback<Schema$AdUnit>):
       void|AxiosPromise<Schema$AdUnit> {
     if (typeof options === 'function') {
@@ -717,10 +721,10 @@ export class Resource$Accounts$Adunits {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$AdUnit>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$AdUnit>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$AdUnit>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$AdUnit>,
       callback?: BodyResponseCallback<Schema$AdUnit>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$AdUnit>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$AdUnit>,
       callback?: BodyResponseCallback<Schema$AdUnit>):
       void|AxiosPromise<Schema$AdUnit> {
     if (typeof options === 'function') {
@@ -772,12 +776,12 @@ export class Resource$Accounts$Adunits {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getAdCode(params: any, options?: MethodOptions): AxiosPromise<Schema$AdCode>;
+  getAdCode(params?: any, options?: MethodOptions): AxiosPromise<Schema$AdCode>;
   getAdCode(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$AdCode>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$AdCode>,
       callback?: BodyResponseCallback<Schema$AdCode>): void;
   getAdCode(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$AdCode>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$AdCode>,
       callback?: BodyResponseCallback<Schema$AdCode>):
       void|AxiosPromise<Schema$AdCode> {
     if (typeof options === 'function') {
@@ -828,12 +832,12 @@ export class Resource$Accounts$Adunits {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$AdUnit>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$AdUnit>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$AdUnit>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$AdUnit>,
       callback?: BodyResponseCallback<Schema$AdUnit>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$AdUnit>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$AdUnit>,
       callback?: BodyResponseCallback<Schema$AdUnit>):
       void|AxiosPromise<Schema$AdUnit> {
     if (typeof options === 'function') {
@@ -885,12 +889,14 @@ export class Resource$Accounts$Adunits {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$AdUnits>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$AdUnits>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$AdUnits>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AdUnits>,
       callback?: BodyResponseCallback<Schema$AdUnits>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$AdUnits>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AdUnits>,
       callback?: BodyResponseCallback<Schema$AdUnits>):
       void|AxiosPromise<Schema$AdUnits> {
     if (typeof options === 'function') {
@@ -942,12 +948,12 @@ export class Resource$Accounts$Adunits {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$AdUnit>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$AdUnit>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$AdUnit>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$AdUnit>,
       callback?: BodyResponseCallback<Schema$AdUnit>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$AdUnit>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$AdUnit>,
       callback?: BodyResponseCallback<Schema$AdUnit>):
       void|AxiosPromise<Schema$AdUnit> {
     if (typeof options === 'function') {
@@ -998,12 +1004,12 @@ export class Resource$Accounts$Adunits {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$AdUnit>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$AdUnit>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$AdUnit>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$AdUnit>,
       callback?: BodyResponseCallback<Schema$AdUnit>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$AdUnit>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$AdUnit>,
       callback?: BodyResponseCallback<Schema$AdUnit>):
       void|AxiosPromise<Schema$AdUnit> {
     if (typeof options === 'function') {
@@ -1074,12 +1080,12 @@ export class Resource$Accounts$Reports {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  generate(params: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
+  generate(params?: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
   generate(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Report>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>): void;
   generate(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>):
       void|AxiosPromise<Schema$Report> {
     if (typeof options === 'function') {
@@ -1139,10 +1145,11 @@ export class Resource$Adclients {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$AdClient>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$AdClient>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$AdClient>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AdClient>,
       callback?: BodyResponseCallback<Schema$AdClient>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AdClient>,
       callback?: BodyResponseCallback<Schema$AdClient>):
       void|AxiosPromise<Schema$AdClient> {
@@ -1190,13 +1197,13 @@ export class Resource$Adclients {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$AdClients>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$AdClients>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AdClients>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AdClients>,
       callback?: BodyResponseCallback<Schema$AdClients>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AdClients>,
       callback?: BodyResponseCallback<Schema$AdClients>):
       void|AxiosPromise<Schema$AdClients> {
@@ -1259,14 +1266,14 @@ export class Resource$Associationsessions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  start(params: any, options?: MethodOptions):
+  start(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AssociationSession>;
   start(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AssociationSession>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AssociationSession>,
       callback?: BodyResponseCallback<Schema$AssociationSession>): void;
   start(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AssociationSession>,
       callback?: BodyResponseCallback<Schema$AssociationSession>):
       void|AxiosPromise<Schema$AssociationSession> {
@@ -1314,14 +1321,14 @@ export class Resource$Associationsessions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  verify(params: any, options?: MethodOptions):
+  verify(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AssociationSession>;
   verify(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AssociationSession>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AssociationSession>,
       callback?: BodyResponseCallback<Schema$AssociationSession>): void;
   verify(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AssociationSession>,
       callback?: BodyResponseCallback<Schema$AssociationSession>):
       void|AxiosPromise<Schema$AssociationSession> {
@@ -1381,14 +1388,14 @@ export class Resource$Customchannels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions):
+  delete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CustomChannel>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CustomChannel>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CustomChannel>,
       callback?: BodyResponseCallback<Schema$CustomChannel>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CustomChannel>,
       callback?: BodyResponseCallback<Schema$CustomChannel>):
       void|AxiosPromise<Schema$CustomChannel> {
@@ -1438,11 +1445,12 @@ export class Resource$Customchannels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$CustomChannel>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CustomChannel>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$CustomChannel>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CustomChannel>,
       callback?: BodyResponseCallback<Schema$CustomChannel>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CustomChannel>,
       callback?: BodyResponseCallback<Schema$CustomChannel>):
       void|AxiosPromise<Schema$CustomChannel> {
@@ -1492,14 +1500,14 @@ export class Resource$Customchannels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CustomChannel>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CustomChannel>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CustomChannel>,
       callback?: BodyResponseCallback<Schema$CustomChannel>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CustomChannel>,
       callback?: BodyResponseCallback<Schema$CustomChannel>):
       void|AxiosPromise<Schema$CustomChannel> {
@@ -1549,14 +1557,14 @@ export class Resource$Customchannels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CustomChannels>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CustomChannels>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CustomChannels>,
       callback?: BodyResponseCallback<Schema$CustomChannels>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CustomChannels>,
       callback?: BodyResponseCallback<Schema$CustomChannels>):
       void|AxiosPromise<Schema$CustomChannels> {
@@ -1607,14 +1615,14 @@ export class Resource$Customchannels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CustomChannel>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CustomChannel>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CustomChannel>,
       callback?: BodyResponseCallback<Schema$CustomChannel>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CustomChannel>,
       callback?: BodyResponseCallback<Schema$CustomChannel>):
       void|AxiosPromise<Schema$CustomChannel> {
@@ -1663,14 +1671,14 @@ export class Resource$Customchannels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CustomChannel>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CustomChannel>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CustomChannel>,
       callback?: BodyResponseCallback<Schema$CustomChannel>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CustomChannel>,
       callback?: BodyResponseCallback<Schema$CustomChannel>):
       void|AxiosPromise<Schema$CustomChannel> {
@@ -1740,12 +1748,12 @@ export class Resource$Reports {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  generate(params: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
+  generate(params?: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
   generate(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Report>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>): void;
   generate(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>):
       void|AxiosPromise<Schema$Report> {
     if (typeof options === 'function') {
@@ -1804,13 +1812,14 @@ export class Resource$Urlchannels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$UrlChannel>;
+  delete(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$UrlChannel>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UrlChannel>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UrlChannel>,
       callback?: BodyResponseCallback<Schema$UrlChannel>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UrlChannel>,
       callback?: BodyResponseCallback<Schema$UrlChannel>):
       void|AxiosPromise<Schema$UrlChannel> {
@@ -1860,13 +1869,14 @@ export class Resource$Urlchannels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$UrlChannel>;
+  insert(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$UrlChannel>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UrlChannel>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UrlChannel>,
       callback?: BodyResponseCallback<Schema$UrlChannel>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UrlChannel>,
       callback?: BodyResponseCallback<Schema$UrlChannel>):
       void|AxiosPromise<Schema$UrlChannel> {
@@ -1916,13 +1926,13 @@ export class Resource$Urlchannels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$UrlChannels>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$UrlChannels>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UrlChannels>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UrlChannels>,
       callback?: BodyResponseCallback<Schema$UrlChannels>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UrlChannels>,
       callback?: BodyResponseCallback<Schema$UrlChannels>):
       void|AxiosPromise<Schema$UrlChannels> {
diff --git a/src/apis/analytics/v2.4.ts b/src/apis/analytics/v2.4.ts
index f51a7b50c5..9a497e8d1e 100644
--- a/src/apis/analytics/v2.4.ts
+++ b/src/apis/analytics/v2.4.ts
@@ -99,10 +99,10 @@ export class Resource$Data {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<void>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<void>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<void>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<void>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -181,12 +181,12 @@ export class Resource$Management$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<void>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<void>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -247,12 +247,12 @@ export class Resource$Management$Goals {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<void>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<void>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -314,12 +314,12 @@ export class Resource$Management$Profiles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<void>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<void>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -379,12 +379,12 @@ export class Resource$Management$Segments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<void>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<void>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -443,12 +443,12 @@ export class Resource$Management$Webproperties {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<void>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<void>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
diff --git a/src/apis/analytics/v3.ts b/src/apis/analytics/v3.ts
index c513b92613..cd0f879d7d 100644
--- a/src/apis/analytics/v3.ts
+++ b/src/apis/analytics/v3.ts
@@ -2635,10 +2635,10 @@ export class Resource$Data$Ga {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$GaData>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$GaData>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$GaData>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$GaData>,
       callback?: BodyResponseCallback<Schema$GaData>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$GaData>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$GaData>,
       callback?: BodyResponseCallback<Schema$GaData>):
       void|AxiosPromise<Schema$GaData> {
     if (typeof options === 'function') {
@@ -2705,10 +2705,12 @@ export class Resource$Data$Mcf {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$McfData>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$McfData>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$McfData>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$McfData>,
       callback?: BodyResponseCallback<Schema$McfData>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$McfData>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$McfData>,
       callback?: BodyResponseCallback<Schema$McfData>):
       void|AxiosPromise<Schema$McfData> {
     if (typeof options === 'function') {
@@ -2771,11 +2773,11 @@ export class Resource$Data$Realtime {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$RealtimeData>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RealtimeData>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$RealtimeData>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RealtimeData>,
       callback?: BodyResponseCallback<Schema$RealtimeData>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RealtimeData>,
       callback?: BodyResponseCallback<Schema$RealtimeData>):
       void|AxiosPromise<Schema$RealtimeData> {
@@ -2888,12 +2890,13 @@ export class Resource$Management$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Accounts>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Accounts>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Accounts>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Accounts>,
       callback?: BodyResponseCallback<Schema$Accounts>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Accounts>,
       callback?: BodyResponseCallback<Schema$Accounts>):
       void|AxiosPromise<Schema$Accounts> {
@@ -2954,14 +2957,14 @@ export class Resource$Management$Accountsummaries {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AccountSummaries>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AccountSummaries>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AccountSummaries>,
       callback?: BodyResponseCallback<Schema$AccountSummaries>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AccountSummaries>,
       callback?: BodyResponseCallback<Schema$AccountSummaries>):
       void|AxiosPromise<Schema$AccountSummaries> {
@@ -3021,12 +3024,12 @@ export class Resource$Management$Accountuserlinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -3074,14 +3077,14 @@ export class Resource$Management$Accountuserlinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$EntityUserLink>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$EntityUserLink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$EntityUserLink>,
       callback?: BodyResponseCallback<Schema$EntityUserLink>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$EntityUserLink>,
       callback?: BodyResponseCallback<Schema$EntityUserLink>):
       void|AxiosPromise<Schema$EntityUserLink> {
@@ -3132,14 +3135,14 @@ export class Resource$Management$Accountuserlinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$EntityUserLinks>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$EntityUserLinks>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$EntityUserLinks>,
       callback?: BodyResponseCallback<Schema$EntityUserLinks>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$EntityUserLinks>,
       callback?: BodyResponseCallback<Schema$EntityUserLinks>):
       void|AxiosPromise<Schema$EntityUserLinks> {
@@ -3190,14 +3193,14 @@ export class Resource$Management$Accountuserlinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$EntityUserLink>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$EntityUserLink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$EntityUserLink>,
       callback?: BodyResponseCallback<Schema$EntityUserLink>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$EntityUserLink>,
       callback?: BodyResponseCallback<Schema$EntityUserLink>):
       void|AxiosPromise<Schema$EntityUserLink> {
@@ -3261,14 +3264,14 @@ export class Resource$Management$Customdatasources {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CustomDataSources>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CustomDataSources>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CustomDataSources>,
       callback?: BodyResponseCallback<Schema$CustomDataSources>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CustomDataSources>,
       callback?: BodyResponseCallback<Schema$CustomDataSources>):
       void|AxiosPromise<Schema$CustomDataSources> {
@@ -3331,12 +3334,12 @@ export class Resource$Management$Customdimensions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$CustomDimension>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CustomDimension>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CustomDimension>,
       callback?: BodyResponseCallback<Schema$CustomDimension>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CustomDimension>,
       callback?: BodyResponseCallback<Schema$CustomDimension>):
       void|AxiosPromise<Schema$CustomDimension> {
@@ -3387,14 +3390,14 @@ export class Resource$Management$Customdimensions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CustomDimension>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CustomDimension>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CustomDimension>,
       callback?: BodyResponseCallback<Schema$CustomDimension>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CustomDimension>,
       callback?: BodyResponseCallback<Schema$CustomDimension>):
       void|AxiosPromise<Schema$CustomDimension> {
@@ -3446,14 +3449,14 @@ export class Resource$Management$Customdimensions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CustomDimensions>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CustomDimensions>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CustomDimensions>,
       callback?: BodyResponseCallback<Schema$CustomDimensions>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CustomDimensions>,
       callback?: BodyResponseCallback<Schema$CustomDimensions>):
       void|AxiosPromise<Schema$CustomDimensions> {
@@ -3507,14 +3510,14 @@ export class Resource$Management$Customdimensions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CustomDimension>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CustomDimension>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CustomDimension>,
       callback?: BodyResponseCallback<Schema$CustomDimension>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CustomDimension>,
       callback?: BodyResponseCallback<Schema$CustomDimension>):
       void|AxiosPromise<Schema$CustomDimension> {
@@ -3567,14 +3570,14 @@ export class Resource$Management$Customdimensions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CustomDimension>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CustomDimension>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CustomDimension>,
       callback?: BodyResponseCallback<Schema$CustomDimension>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CustomDimension>,
       callback?: BodyResponseCallback<Schema$CustomDimension>):
       void|AxiosPromise<Schema$CustomDimension> {
@@ -3637,11 +3640,11 @@ export class Resource$Management$Custommetrics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$CustomMetric>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CustomMetric>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$CustomMetric>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CustomMetric>,
       callback?: BodyResponseCallback<Schema$CustomMetric>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CustomMetric>,
       callback?: BodyResponseCallback<Schema$CustomMetric>):
       void|AxiosPromise<Schema$CustomMetric> {
@@ -3692,14 +3695,14 @@ export class Resource$Management$Custommetrics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CustomMetric>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CustomMetric>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CustomMetric>,
       callback?: BodyResponseCallback<Schema$CustomMetric>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CustomMetric>,
       callback?: BodyResponseCallback<Schema$CustomMetric>):
       void|AxiosPromise<Schema$CustomMetric> {
@@ -3751,14 +3754,14 @@ export class Resource$Management$Custommetrics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CustomMetrics>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CustomMetrics>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CustomMetrics>,
       callback?: BodyResponseCallback<Schema$CustomMetrics>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CustomMetrics>,
       callback?: BodyResponseCallback<Schema$CustomMetrics>):
       void|AxiosPromise<Schema$CustomMetrics> {
@@ -3812,14 +3815,14 @@ export class Resource$Management$Custommetrics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CustomMetric>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CustomMetric>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CustomMetric>,
       callback?: BodyResponseCallback<Schema$CustomMetric>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CustomMetric>,
       callback?: BodyResponseCallback<Schema$CustomMetric>):
       void|AxiosPromise<Schema$CustomMetric> {
@@ -3872,14 +3875,14 @@ export class Resource$Management$Custommetrics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CustomMetric>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CustomMetric>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CustomMetric>,
       callback?: BodyResponseCallback<Schema$CustomMetric>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CustomMetric>,
       callback?: BodyResponseCallback<Schema$CustomMetric>):
       void|AxiosPromise<Schema$CustomMetric> {
@@ -3943,12 +3946,12 @@ export class Resource$Management$Experiments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -3999,11 +4002,11 @@ export class Resource$Management$Experiments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Experiment>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Experiment>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Experiment>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Experiment>,
       callback?: BodyResponseCallback<Schema$Experiment>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Experiment>,
       callback?: BodyResponseCallback<Schema$Experiment>):
       void|AxiosPromise<Schema$Experiment> {
@@ -4056,13 +4059,14 @@ export class Resource$Management$Experiments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Experiment>;
+  insert(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Experiment>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Experiment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Experiment>,
       callback?: BodyResponseCallback<Schema$Experiment>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Experiment>,
       callback?: BodyResponseCallback<Schema$Experiment>):
       void|AxiosPromise<Schema$Experiment> {
@@ -4115,13 +4119,13 @@ export class Resource$Management$Experiments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Experiments>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Experiments>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Experiments>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Experiments>,
       callback?: BodyResponseCallback<Schema$Experiments>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Experiments>,
       callback?: BodyResponseCallback<Schema$Experiments>):
       void|AxiosPromise<Schema$Experiments> {
@@ -4174,13 +4178,13 @@ export class Resource$Management$Experiments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Experiment>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Experiment>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Experiment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Experiment>,
       callback?: BodyResponseCallback<Schema$Experiment>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Experiment>,
       callback?: BodyResponseCallback<Schema$Experiment>):
       void|AxiosPromise<Schema$Experiment> {
@@ -4234,13 +4238,14 @@ export class Resource$Management$Experiments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Experiment>;
+  update(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Experiment>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Experiment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Experiment>,
       callback?: BodyResponseCallback<Schema$Experiment>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Experiment>,
       callback?: BodyResponseCallback<Schema$Experiment>):
       void|AxiosPromise<Schema$Experiment> {
@@ -4303,12 +4308,12 @@ export class Resource$Management$Filters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Filter>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Filter>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Filter>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Filter>,
       callback?: BodyResponseCallback<Schema$Filter>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Filter>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Filter>,
       callback?: BodyResponseCallback<Schema$Filter>):
       void|AxiosPromise<Schema$Filter> {
     if (typeof options === 'function') {
@@ -4357,10 +4362,10 @@ export class Resource$Management$Filters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Filter>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Filter>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Filter>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Filter>,
       callback?: BodyResponseCallback<Schema$Filter>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Filter>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Filter>,
       callback?: BodyResponseCallback<Schema$Filter>):
       void|AxiosPromise<Schema$Filter> {
     if (typeof options === 'function') {
@@ -4409,12 +4414,12 @@ export class Resource$Management$Filters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Filter>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Filter>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Filter>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Filter>,
       callback?: BodyResponseCallback<Schema$Filter>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Filter>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Filter>,
       callback?: BodyResponseCallback<Schema$Filter>):
       void|AxiosPromise<Schema$Filter> {
     if (typeof options === 'function') {
@@ -4463,12 +4468,14 @@ export class Resource$Management$Filters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Filters>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Filters>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Filters>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Filters>,
       callback?: BodyResponseCallback<Schema$Filters>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Filters>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Filters>,
       callback?: BodyResponseCallback<Schema$Filters>):
       void|AxiosPromise<Schema$Filters> {
     if (typeof options === 'function') {
@@ -4517,12 +4524,12 @@ export class Resource$Management$Filters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Filter>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Filter>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Filter>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Filter>,
       callback?: BodyResponseCallback<Schema$Filter>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Filter>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Filter>,
       callback?: BodyResponseCallback<Schema$Filter>):
       void|AxiosPromise<Schema$Filter> {
     if (typeof options === 'function') {
@@ -4572,12 +4579,12 @@ export class Resource$Management$Filters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Filter>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Filter>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Filter>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Filter>,
       callback?: BodyResponseCallback<Schema$Filter>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Filter>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Filter>,
       callback?: BodyResponseCallback<Schema$Filter>):
       void|AxiosPromise<Schema$Filter> {
     if (typeof options === 'function') {
@@ -4640,10 +4647,10 @@ export class Resource$Management$Goals {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Goal>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Goal>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Goal>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Goal>,
       callback?: BodyResponseCallback<Schema$Goal>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Goal>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Goal>,
       callback?: BodyResponseCallback<Schema$Goal>):
       void|AxiosPromise<Schema$Goal> {
     if (typeof options === 'function') {
@@ -4694,12 +4701,12 @@ export class Resource$Management$Goals {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Goal>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Goal>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Goal>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Goal>,
       callback?: BodyResponseCallback<Schema$Goal>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Goal>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Goal>,
       callback?: BodyResponseCallback<Schema$Goal>):
       void|AxiosPromise<Schema$Goal> {
     if (typeof options === 'function') {
@@ -4751,12 +4758,12 @@ export class Resource$Management$Goals {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Goals>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Goals>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Goals>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Goals>,
       callback?: BodyResponseCallback<Schema$Goals>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Goals>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Goals>,
       callback?: BodyResponseCallback<Schema$Goals>):
       void|AxiosPromise<Schema$Goals> {
     if (typeof options === 'function') {
@@ -4808,12 +4815,12 @@ export class Resource$Management$Goals {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Goal>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Goal>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Goal>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Goal>,
       callback?: BodyResponseCallback<Schema$Goal>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Goal>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Goal>,
       callback?: BodyResponseCallback<Schema$Goal>):
       void|AxiosPromise<Schema$Goal> {
     if (typeof options === 'function') {
@@ -4865,12 +4872,12 @@ export class Resource$Management$Goals {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Goal>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Goal>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Goal>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Goal>,
       callback?: BodyResponseCallback<Schema$Goal>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Goal>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Goal>,
       callback?: BodyResponseCallback<Schema$Goal>):
       void|AxiosPromise<Schema$Goal> {
     if (typeof options === 'function') {
@@ -4933,12 +4940,12 @@ export class Resource$Management$Profilefilterlinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -4988,12 +4995,12 @@ export class Resource$Management$Profilefilterlinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$ProfileFilterLink>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ProfileFilterLink>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ProfileFilterLink>,
       callback?: BodyResponseCallback<Schema$ProfileFilterLink>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ProfileFilterLink>,
       callback?: BodyResponseCallback<Schema$ProfileFilterLink>):
       void|AxiosPromise<Schema$ProfileFilterLink> {
@@ -5045,14 +5052,14 @@ export class Resource$Management$Profilefilterlinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ProfileFilterLink>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ProfileFilterLink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ProfileFilterLink>,
       callback?: BodyResponseCallback<Schema$ProfileFilterLink>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ProfileFilterLink>,
       callback?: BodyResponseCallback<Schema$ProfileFilterLink>):
       void|AxiosPromise<Schema$ProfileFilterLink> {
@@ -5105,14 +5112,14 @@ export class Resource$Management$Profilefilterlinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ProfileFilterLinks>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ProfileFilterLinks>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ProfileFilterLinks>,
       callback?: BodyResponseCallback<Schema$ProfileFilterLinks>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ProfileFilterLinks>,
       callback?: BodyResponseCallback<Schema$ProfileFilterLinks>):
       void|AxiosPromise<Schema$ProfileFilterLinks> {
@@ -5166,14 +5173,14 @@ export class Resource$Management$Profilefilterlinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ProfileFilterLink>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ProfileFilterLink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ProfileFilterLink>,
       callback?: BodyResponseCallback<Schema$ProfileFilterLink>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ProfileFilterLink>,
       callback?: BodyResponseCallback<Schema$ProfileFilterLink>):
       void|AxiosPromise<Schema$ProfileFilterLink> {
@@ -5226,14 +5233,14 @@ export class Resource$Management$Profilefilterlinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ProfileFilterLink>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ProfileFilterLink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ProfileFilterLink>,
       callback?: BodyResponseCallback<Schema$ProfileFilterLink>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ProfileFilterLink>,
       callback?: BodyResponseCallback<Schema$ProfileFilterLink>):
       void|AxiosPromise<Schema$ProfileFilterLink> {
@@ -5296,12 +5303,12 @@ export class Resource$Management$Profiles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -5350,10 +5357,12 @@ export class Resource$Management$Profiles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Profile>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Profile>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Profile>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Profile>,
       callback?: BodyResponseCallback<Schema$Profile>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Profile>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Profile>,
       callback?: BodyResponseCallback<Schema$Profile>):
       void|AxiosPromise<Schema$Profile> {
     if (typeof options === 'function') {
@@ -5403,12 +5412,14 @@ export class Resource$Management$Profiles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Profile>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Profile>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Profile>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Profile>,
       callback?: BodyResponseCallback<Schema$Profile>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Profile>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Profile>,
       callback?: BodyResponseCallback<Schema$Profile>):
       void|AxiosPromise<Schema$Profile> {
     if (typeof options === 'function') {
@@ -5459,12 +5470,13 @@ export class Resource$Management$Profiles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Profiles>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Profiles>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Profiles>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Profiles>,
       callback?: BodyResponseCallback<Schema$Profiles>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Profiles>,
       callback?: BodyResponseCallback<Schema$Profiles>):
       void|AxiosPromise<Schema$Profiles> {
@@ -5517,12 +5529,14 @@ export class Resource$Management$Profiles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Profile>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Profile>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Profile>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Profile>,
       callback?: BodyResponseCallback<Schema$Profile>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Profile>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Profile>,
       callback?: BodyResponseCallback<Schema$Profile>):
       void|AxiosPromise<Schema$Profile> {
     if (typeof options === 'function') {
@@ -5573,12 +5587,14 @@ export class Resource$Management$Profiles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Profile>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Profile>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Profile>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Profile>,
       callback?: BodyResponseCallback<Schema$Profile>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Profile>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Profile>,
       callback?: BodyResponseCallback<Schema$Profile>):
       void|AxiosPromise<Schema$Profile> {
     if (typeof options === 'function') {
@@ -5641,12 +5657,12 @@ export class Resource$Management$Profileuserlinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -5696,14 +5712,14 @@ export class Resource$Management$Profileuserlinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$EntityUserLink>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$EntityUserLink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$EntityUserLink>,
       callback?: BodyResponseCallback<Schema$EntityUserLink>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$EntityUserLink>,
       callback?: BodyResponseCallback<Schema$EntityUserLink>):
       void|AxiosPromise<Schema$EntityUserLink> {
@@ -5756,14 +5772,14 @@ export class Resource$Management$Profileuserlinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$EntityUserLinks>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$EntityUserLinks>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$EntityUserLinks>,
       callback?: BodyResponseCallback<Schema$EntityUserLinks>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$EntityUserLinks>,
       callback?: BodyResponseCallback<Schema$EntityUserLinks>):
       void|AxiosPromise<Schema$EntityUserLinks> {
@@ -5816,14 +5832,14 @@ export class Resource$Management$Profileuserlinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$EntityUserLink>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$EntityUserLink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$EntityUserLink>,
       callback?: BodyResponseCallback<Schema$EntityUserLink>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$EntityUserLink>,
       callback?: BodyResponseCallback<Schema$EntityUserLink>):
       void|AxiosPromise<Schema$EntityUserLink> {
@@ -5886,12 +5902,12 @@ export class Resource$Management$Remarketingaudience {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -5940,12 +5956,12 @@ export class Resource$Management$Remarketingaudience {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$RemarketingAudience>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RemarketingAudience>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RemarketingAudience>,
       callback?: BodyResponseCallback<Schema$RemarketingAudience>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RemarketingAudience>,
       callback?: BodyResponseCallback<Schema$RemarketingAudience>):
       void|AxiosPromise<Schema$RemarketingAudience> {
@@ -5996,14 +6012,14 @@ export class Resource$Management$Remarketingaudience {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RemarketingAudience>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RemarketingAudience>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RemarketingAudience>,
       callback?: BodyResponseCallback<Schema$RemarketingAudience>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RemarketingAudience>,
       callback?: BodyResponseCallback<Schema$RemarketingAudience>):
       void|AxiosPromise<Schema$RemarketingAudience> {
@@ -6056,14 +6072,14 @@ export class Resource$Management$Remarketingaudience {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RemarketingAudiences>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RemarketingAudiences>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RemarketingAudiences>,
       callback?: BodyResponseCallback<Schema$RemarketingAudiences>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RemarketingAudiences>,
       callback?: BodyResponseCallback<Schema$RemarketingAudiences>):
       void|AxiosPromise<Schema$RemarketingAudiences> {
@@ -6116,14 +6132,14 @@ export class Resource$Management$Remarketingaudience {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RemarketingAudience>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RemarketingAudience>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RemarketingAudience>,
       callback?: BodyResponseCallback<Schema$RemarketingAudience>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RemarketingAudience>,
       callback?: BodyResponseCallback<Schema$RemarketingAudience>):
       void|AxiosPromise<Schema$RemarketingAudience> {
@@ -6175,14 +6191,14 @@ export class Resource$Management$Remarketingaudience {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RemarketingAudience>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RemarketingAudience>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RemarketingAudience>,
       callback?: BodyResponseCallback<Schema$RemarketingAudience>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RemarketingAudience>,
       callback?: BodyResponseCallback<Schema$RemarketingAudience>):
       void|AxiosPromise<Schema$RemarketingAudience> {
@@ -6244,12 +6260,13 @@ export class Resource$Management$Segments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Segments>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Segments>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Segments>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Segments>,
       callback?: BodyResponseCallback<Schema$Segments>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Segments>,
       callback?: BodyResponseCallback<Schema$Segments>):
       void|AxiosPromise<Schema$Segments> {
@@ -6311,12 +6328,12 @@ export class Resource$Management$Unsampledreports {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -6368,12 +6385,12 @@ export class Resource$Management$Unsampledreports {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$UnsampledReport>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UnsampledReport>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UnsampledReport>,
       callback?: BodyResponseCallback<Schema$UnsampledReport>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UnsampledReport>,
       callback?: BodyResponseCallback<Schema$UnsampledReport>):
       void|AxiosPromise<Schema$UnsampledReport> {
@@ -6427,14 +6444,14 @@ export class Resource$Management$Unsampledreports {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$UnsampledReport>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UnsampledReport>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UnsampledReport>,
       callback?: BodyResponseCallback<Schema$UnsampledReport>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UnsampledReport>,
       callback?: BodyResponseCallback<Schema$UnsampledReport>):
       void|AxiosPromise<Schema$UnsampledReport> {
@@ -6487,14 +6504,14 @@ export class Resource$Management$Unsampledreports {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$UnsampledReports>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UnsampledReports>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UnsampledReports>,
       callback?: BodyResponseCallback<Schema$UnsampledReports>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UnsampledReports>,
       callback?: BodyResponseCallback<Schema$UnsampledReports>):
       void|AxiosPromise<Schema$UnsampledReports> {
@@ -6558,12 +6575,12 @@ export class Resource$Management$Uploads {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  deleteUploadData(params: any, options?: MethodOptions): AxiosPromise<void>;
+  deleteUploadData(params?: any, options?: MethodOptions): AxiosPromise<void>;
   deleteUploadData(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   deleteUploadData(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -6613,10 +6630,10 @@ export class Resource$Management$Uploads {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Upload>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Upload>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Upload>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Upload>,
       callback?: BodyResponseCallback<Schema$Upload>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Upload>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Upload>,
       callback?: BodyResponseCallback<Schema$Upload>):
       void|AxiosPromise<Schema$Upload> {
     if (typeof options === 'function') {
@@ -6670,12 +6687,14 @@ export class Resource$Management$Uploads {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Uploads>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Uploads>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Uploads>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Uploads>,
       callback?: BodyResponseCallback<Schema$Uploads>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Uploads>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Uploads>,
       callback?: BodyResponseCallback<Schema$Uploads>):
       void|AxiosPromise<Schema$Uploads> {
     if (typeof options === 'function') {
@@ -6728,12 +6747,13 @@ export class Resource$Management$Uploads {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  uploadData(params: any, options?: MethodOptions): AxiosPromise<Schema$Upload>;
+  uploadData(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Upload>;
   uploadData(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Upload>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Upload>,
       callback?: BodyResponseCallback<Schema$Upload>): void;
   uploadData(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Upload>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Upload>,
       callback?: BodyResponseCallback<Schema$Upload>):
       void|AxiosPromise<Schema$Upload> {
     if (typeof options === 'function') {
@@ -6798,11 +6818,11 @@ export class Resource$Management$Webproperties {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Webproperty>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Webproperty>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Webproperty>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Webproperty>,
       callback?: BodyResponseCallback<Schema$Webproperty>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Webproperty>,
       callback?: BodyResponseCallback<Schema$Webproperty>):
       void|AxiosPromise<Schema$Webproperty> {
@@ -6854,14 +6874,14 @@ export class Resource$Management$Webproperties {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Webproperty>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Webproperty>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Webproperty>,
       callback?: BodyResponseCallback<Schema$Webproperty>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Webproperty>,
       callback?: BodyResponseCallback<Schema$Webproperty>):
       void|AxiosPromise<Schema$Webproperty> {
@@ -6911,14 +6931,14 @@ export class Resource$Management$Webproperties {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Webproperties>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Webproperties>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Webproperties>,
       callback?: BodyResponseCallback<Schema$Webproperties>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Webproperties>,
       callback?: BodyResponseCallback<Schema$Webproperties>):
       void|AxiosPromise<Schema$Webproperties> {
@@ -6969,13 +6989,14 @@ export class Resource$Management$Webproperties {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Webproperty>;
+  patch(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Webproperty>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Webproperty>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Webproperty>,
       callback?: BodyResponseCallback<Schema$Webproperty>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Webproperty>,
       callback?: BodyResponseCallback<Schema$Webproperty>):
       void|AxiosPromise<Schema$Webproperty> {
@@ -7026,14 +7047,14 @@ export class Resource$Management$Webproperties {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Webproperty>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Webproperty>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Webproperty>,
       callback?: BodyResponseCallback<Schema$Webproperty>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Webproperty>,
       callback?: BodyResponseCallback<Schema$Webproperty>):
       void|AxiosPromise<Schema$Webproperty> {
@@ -7096,12 +7117,12 @@ export class Resource$Management$Webpropertyadwordslinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -7151,12 +7172,12 @@ export class Resource$Management$Webpropertyadwordslinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$EntityAdWordsLink>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$EntityAdWordsLink>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$EntityAdWordsLink>,
       callback?: BodyResponseCallback<Schema$EntityAdWordsLink>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$EntityAdWordsLink>,
       callback?: BodyResponseCallback<Schema$EntityAdWordsLink>):
       void|AxiosPromise<Schema$EntityAdWordsLink> {
@@ -7208,14 +7229,14 @@ export class Resource$Management$Webpropertyadwordslinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$EntityAdWordsLink>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$EntityAdWordsLink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$EntityAdWordsLink>,
       callback?: BodyResponseCallback<Schema$EntityAdWordsLink>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$EntityAdWordsLink>,
       callback?: BodyResponseCallback<Schema$EntityAdWordsLink>):
       void|AxiosPromise<Schema$EntityAdWordsLink> {
@@ -7267,14 +7288,14 @@ export class Resource$Management$Webpropertyadwordslinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$EntityAdWordsLinks>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$EntityAdWordsLinks>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$EntityAdWordsLinks>,
       callback?: BodyResponseCallback<Schema$EntityAdWordsLinks>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$EntityAdWordsLinks>,
       callback?: BodyResponseCallback<Schema$EntityAdWordsLinks>):
       void|AxiosPromise<Schema$EntityAdWordsLinks> {
@@ -7327,14 +7348,14 @@ export class Resource$Management$Webpropertyadwordslinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$EntityAdWordsLink>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$EntityAdWordsLink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$EntityAdWordsLink>,
       callback?: BodyResponseCallback<Schema$EntityAdWordsLink>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$EntityAdWordsLink>,
       callback?: BodyResponseCallback<Schema$EntityAdWordsLink>):
       void|AxiosPromise<Schema$EntityAdWordsLink> {
@@ -7387,14 +7408,14 @@ export class Resource$Management$Webpropertyadwordslinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$EntityAdWordsLink>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$EntityAdWordsLink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$EntityAdWordsLink>,
       callback?: BodyResponseCallback<Schema$EntityAdWordsLink>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$EntityAdWordsLink>,
       callback?: BodyResponseCallback<Schema$EntityAdWordsLink>):
       void|AxiosPromise<Schema$EntityAdWordsLink> {
@@ -7458,12 +7479,12 @@ export class Resource$Management$Webpropertyuserlinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -7512,14 +7533,14 @@ export class Resource$Management$Webpropertyuserlinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$EntityUserLink>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$EntityUserLink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$EntityUserLink>,
       callback?: BodyResponseCallback<Schema$EntityUserLink>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$EntityUserLink>,
       callback?: BodyResponseCallback<Schema$EntityUserLink>):
       void|AxiosPromise<Schema$EntityUserLink> {
@@ -7571,14 +7592,14 @@ export class Resource$Management$Webpropertyuserlinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$EntityUserLinks>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$EntityUserLinks>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$EntityUserLinks>,
       callback?: BodyResponseCallback<Schema$EntityUserLinks>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$EntityUserLinks>,
       callback?: BodyResponseCallback<Schema$EntityUserLinks>):
       void|AxiosPromise<Schema$EntityUserLinks> {
@@ -7630,14 +7651,14 @@ export class Resource$Management$Webpropertyuserlinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$EntityUserLink>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$EntityUserLink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$EntityUserLink>,
       callback?: BodyResponseCallback<Schema$EntityUserLink>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$EntityUserLink>,
       callback?: BodyResponseCallback<Schema$EntityUserLink>):
       void|AxiosPromise<Schema$EntityUserLink> {
@@ -7712,12 +7733,14 @@ export class Resource$Metadata$Columns {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Columns>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Columns>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Columns>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Columns>,
       callback?: BodyResponseCallback<Schema$Columns>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Columns>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Columns>,
       callback?: BodyResponseCallback<Schema$Columns>):
       void|AxiosPromise<Schema$Columns> {
     if (typeof options === 'function') {
@@ -7776,14 +7799,14 @@ export class Resource$Provisioning {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  createAccountTicket(params: any, options?: MethodOptions):
+  createAccountTicket(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AccountTicket>;
   createAccountTicket(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AccountTicket>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AccountTicket>,
       callback?: BodyResponseCallback<Schema$AccountTicket>): void;
   createAccountTicket(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AccountTicket>,
       callback?: BodyResponseCallback<Schema$AccountTicket>):
       void|AxiosPromise<Schema$AccountTicket> {
@@ -7830,14 +7853,14 @@ export class Resource$Provisioning {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  createAccountTree(params: any, options?: MethodOptions):
+  createAccountTree(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AccountTreeResponse>;
   createAccountTree(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AccountTreeResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AccountTreeResponse>,
       callback?: BodyResponseCallback<Schema$AccountTreeResponse>): void;
   createAccountTree(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AccountTreeResponse>,
       callback?: BodyResponseCallback<Schema$AccountTreeResponse>):
       void|AxiosPromise<Schema$AccountTreeResponse> {
diff --git a/src/apis/analyticsreporting/v4.ts b/src/apis/analyticsreporting/v4.ts
index 525c37811d..1e34ac548c 100644
--- a/src/apis/analyticsreporting/v4.ts
+++ b/src/apis/analyticsreporting/v4.ts
@@ -970,14 +970,14 @@ export class Resource$Reports {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchGet(params: any, options?: MethodOptions):
+  batchGet(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GetReportsResponse>;
   batchGet(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GetReportsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GetReportsResponse>,
       callback?: BodyResponseCallback<Schema$GetReportsResponse>): void;
   batchGet(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GetReportsResponse>,
       callback?: BodyResponseCallback<Schema$GetReportsResponse>):
       void|AxiosPromise<Schema$GetReportsResponse> {
diff --git a/src/apis/androiddeviceprovisioning/v1.ts b/src/apis/androiddeviceprovisioning/v1.ts
index 0626564c3e..14a4009f13 100644
--- a/src/apis/androiddeviceprovisioning/v1.ts
+++ b/src/apis/androiddeviceprovisioning/v1.ts
@@ -822,16 +822,16 @@ export class Resource$Customers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CustomerListCustomersResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$CustomerListCustomersResponse>,
       callback?: BodyResponseCallback<Schema$CustomerListCustomersResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$CustomerListCustomersResponse>,
       callback?: BodyResponseCallback<Schema$CustomerListCustomersResponse>):
@@ -893,14 +893,14 @@ export class Resource$Customers$Configurations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Configuration>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Configuration>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Configuration>,
       callback?: BodyResponseCallback<Schema$Configuration>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Configuration>,
       callback?: BodyResponseCallback<Schema$Configuration>):
       void|AxiosPromise<Schema$Configuration> {
@@ -949,12 +949,12 @@ export class Resource$Customers$Configurations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1000,11 +1000,12 @@ export class Resource$Customers$Configurations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Configuration>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Configuration>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$Configuration>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Configuration>,
       callback?: BodyResponseCallback<Schema$Configuration>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Configuration>,
       callback?: BodyResponseCallback<Schema$Configuration>):
       void|AxiosPromise<Schema$Configuration> {
@@ -1051,17 +1052,17 @@ export class Resource$Customers$Configurations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CustomerListConfigurationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$CustomerListConfigurationsResponse>,
       callback?:
           BodyResponseCallback<Schema$CustomerListConfigurationsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$CustomerListConfigurationsResponse>,
       callback?:
@@ -1115,14 +1116,14 @@ export class Resource$Customers$Configurations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Configuration>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Configuration>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Configuration>,
       callback?: BodyResponseCallback<Schema$Configuration>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Configuration>,
       callback?: BodyResponseCallback<Schema$Configuration>):
       void|AxiosPromise<Schema$Configuration> {
@@ -1185,13 +1186,13 @@ export class Resource$Customers$Devices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  applyConfiguration(params: any, options?: MethodOptions):
+  applyConfiguration(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Empty>;
   applyConfiguration(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   applyConfiguration(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1238,10 +1239,10 @@ export class Resource$Customers$Devices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Device>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Device>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Device>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Device>,
       callback?: BodyResponseCallback<Schema$Device>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Device>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Device>,
       callback?: BodyResponseCallback<Schema$Device>):
       void|AxiosPromise<Schema$Device> {
     if (typeof options === 'function') {
@@ -1289,16 +1290,16 @@ export class Resource$Customers$Devices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CustomerListDevicesResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$CustomerListDevicesResponse>,
       callback?: BodyResponseCallback<Schema$CustomerListDevicesResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$CustomerListDevicesResponse>,
       callback?: BodyResponseCallback<Schema$CustomerListDevicesResponse>):
@@ -1349,13 +1350,13 @@ export class Resource$Customers$Devices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  removeConfiguration(params: any, options?: MethodOptions):
+  removeConfiguration(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Empty>;
   removeConfiguration(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   removeConfiguration(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1405,12 +1406,12 @@ export class Resource$Customers$Devices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  unclaim(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  unclaim(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   unclaim(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   unclaim(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1470,15 +1471,15 @@ export class Resource$Customers$Dpcs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CustomerListDpcsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$CustomerListDpcsResponse>,
       callback?: BodyResponseCallback<Schema$CustomerListDpcsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$CustomerListDpcsResponse>,
       callback?: BodyResponseCallback<Schema$CustomerListDpcsResponse>):
@@ -1541,11 +1542,11 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1623,12 +1624,14 @@ export class Resource$Partners$Customers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Company>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Company>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Company>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Company>,
       callback?: BodyResponseCallback<Schema$Company>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Company>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Company>,
       callback?: BodyResponseCallback<Schema$Company>):
       void|AxiosPromise<Schema$Company> {
     if (typeof options === 'function') {
@@ -1677,14 +1680,15 @@ export class Resource$Partners$Customers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListCustomersResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListCustomersResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ListCustomersResponse>,
       callback?: BodyResponseCallback<Schema$ListCustomersResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListCustomersResponse>,
       callback?: BodyResponseCallback<Schema$ListCustomersResponse>):
@@ -1748,14 +1752,14 @@ export class Resource$Partners$Devices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  claim(params: any, options?: MethodOptions):
+  claim(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ClaimDeviceResponse>;
   claim(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ClaimDeviceResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ClaimDeviceResponse>,
       callback?: BodyResponseCallback<Schema$ClaimDeviceResponse>): void;
   claim(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ClaimDeviceResponse>,
       callback?: BodyResponseCallback<Schema$ClaimDeviceResponse>):
       void|AxiosPromise<Schema$ClaimDeviceResponse> {
@@ -1806,14 +1810,14 @@ export class Resource$Partners$Devices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  claimAsync(params: any, options?: MethodOptions):
+  claimAsync(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   claimAsync(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   claimAsync(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1862,17 +1866,17 @@ export class Resource$Partners$Devices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  findByIdentifier(params: any, options?: MethodOptions):
+  findByIdentifier(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FindDevicesByDeviceIdentifierResponse>;
   findByIdentifier(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$FindDevicesByDeviceIdentifierResponse>,
       callback?:
           BodyResponseCallback<Schema$FindDevicesByDeviceIdentifierResponse>):
       void;
   findByIdentifier(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$FindDevicesByDeviceIdentifierResponse>,
       callback?:
@@ -1928,15 +1932,15 @@ export class Resource$Partners$Devices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  findByOwner(params: any, options?: MethodOptions):
+  findByOwner(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FindDevicesByOwnerResponse>;
   findByOwner(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$FindDevicesByOwnerResponse>,
       callback?: BodyResponseCallback<Schema$FindDevicesByOwnerResponse>): void;
   findByOwner(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$FindDevicesByOwnerResponse>,
       callback?: BodyResponseCallback<Schema$FindDevicesByOwnerResponse>):
@@ -1985,10 +1989,10 @@ export class Resource$Partners$Devices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Device>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Device>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Device>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Device>,
       callback?: BodyResponseCallback<Schema$Device>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Device>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Device>,
       callback?: BodyResponseCallback<Schema$Device>):
       void|AxiosPromise<Schema$Device> {
     if (typeof options === 'function') {
@@ -2036,14 +2040,14 @@ export class Resource$Partners$Devices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  metadata(params: any, options?: MethodOptions):
+  metadata(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DeviceMetadata>;
   metadata(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DeviceMetadata>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DeviceMetadata>,
       callback?: BodyResponseCallback<Schema$DeviceMetadata>): void;
   metadata(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DeviceMetadata>,
       callback?: BodyResponseCallback<Schema$DeviceMetadata>):
       void|AxiosPromise<Schema$DeviceMetadata> {
@@ -2094,12 +2098,12 @@ export class Resource$Partners$Devices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  unclaim(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  unclaim(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   unclaim(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   unclaim(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2149,14 +2153,14 @@ export class Resource$Partners$Devices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  unclaimAsync(params: any, options?: MethodOptions):
+  unclaimAsync(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   unclaimAsync(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   unclaimAsync(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2208,14 +2212,14 @@ export class Resource$Partners$Devices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  updateMetadataAsync(params: any, options?: MethodOptions):
+  updateMetadataAsync(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   updateMetadataAsync(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   updateMetadataAsync(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
diff --git a/src/apis/androidenterprise/v1.ts b/src/apis/androidenterprise/v1.ts
index ea222aad25..728a860a4e 100644
--- a/src/apis/androidenterprise/v1.ts
+++ b/src/apis/androidenterprise/v1.ts
@@ -1773,10 +1773,10 @@ export class Resource$Devices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Device>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Device>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Device>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Device>,
       callback?: BodyResponseCallback<Schema$Device>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Device>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Device>,
       callback?: BodyResponseCallback<Schema$Device>):
       void|AxiosPromise<Schema$Device> {
     if (typeof options === 'function') {
@@ -1830,14 +1830,14 @@ export class Resource$Devices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getState(params: any, options?: MethodOptions):
+  getState(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DeviceState>;
   getState(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DeviceState>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DeviceState>,
       callback?: BodyResponseCallback<Schema$DeviceState>): void;
   getState(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DeviceState>,
       callback?: BodyResponseCallback<Schema$DeviceState>):
       void|AxiosPromise<Schema$DeviceState> {
@@ -1887,14 +1887,14 @@ export class Resource$Devices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DevicesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DevicesListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DevicesListResponse>,
       callback?: BodyResponseCallback<Schema$DevicesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DevicesListResponse>,
       callback?: BodyResponseCallback<Schema$DevicesListResponse>):
       void|AxiosPromise<Schema$DevicesListResponse> {
@@ -1947,12 +1947,12 @@ export class Resource$Devices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Device>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Device>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Device>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Device>,
       callback?: BodyResponseCallback<Schema$Device>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Device>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Device>,
       callback?: BodyResponseCallback<Schema$Device>):
       void|AxiosPromise<Schema$Device> {
     if (typeof options === 'function') {
@@ -2007,14 +2007,14 @@ export class Resource$Devices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setState(params: any, options?: MethodOptions):
+  setState(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DeviceState>;
   setState(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DeviceState>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DeviceState>,
       callback?: BodyResponseCallback<Schema$DeviceState>): void;
   setState(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DeviceState>,
       callback?: BodyResponseCallback<Schema$DeviceState>):
       void|AxiosPromise<Schema$DeviceState> {
@@ -2067,12 +2067,12 @@ export class Resource$Devices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Device>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Device>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Device>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Device>,
       callback?: BodyResponseCallback<Schema$Device>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Device>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Device>,
       callback?: BodyResponseCallback<Schema$Device>):
       void|AxiosPromise<Schema$Device> {
     if (typeof options === 'function') {
@@ -2134,13 +2134,13 @@ export class Resource$Enterprises {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  acknowledgeNotificationSet(params: any, options?: MethodOptions):
+  acknowledgeNotificationSet(params?: any, options?: MethodOptions):
       AxiosPromise<void>;
   acknowledgeNotificationSet(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   acknowledgeNotificationSet(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2190,14 +2190,14 @@ export class Resource$Enterprises {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  completeSignup(params: any, options?: MethodOptions):
+  completeSignup(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Enterprise>;
   completeSignup(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Enterprise>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Enterprise>,
       callback?: BodyResponseCallback<Schema$Enterprise>): void;
   completeSignup(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Enterprise>,
       callback?: BodyResponseCallback<Schema$Enterprise>):
       void|AxiosPromise<Schema$Enterprise> {
@@ -2248,14 +2248,15 @@ export class Resource$Enterprises {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  createWebToken(params: any, options?: MethodOptions):
+  createWebToken(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AdministratorWebToken>;
   createWebToken(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AdministratorWebToken>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$AdministratorWebToken>,
       callback?: BodyResponseCallback<Schema$AdministratorWebToken>): void;
   createWebToken(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AdministratorWebToken>,
       callback?: BodyResponseCallback<Schema$AdministratorWebToken>):
@@ -2307,12 +2308,12 @@ export class Resource$Enterprises {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2358,13 +2359,14 @@ export class Resource$Enterprises {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  enroll(params: any, options?: MethodOptions): AxiosPromise<Schema$Enterprise>;
+  enroll(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Enterprise>;
   enroll(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Enterprise>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Enterprise>,
       callback?: BodyResponseCallback<Schema$Enterprise>): void;
   enroll(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Enterprise>,
       callback?: BodyResponseCallback<Schema$Enterprise>):
       void|AxiosPromise<Schema$Enterprise> {
@@ -2411,14 +2413,14 @@ export class Resource$Enterprises {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  generateSignupUrl(params: any, options?: MethodOptions):
+  generateSignupUrl(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SignupInfo>;
   generateSignupUrl(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SignupInfo>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SignupInfo>,
       callback?: BodyResponseCallback<Schema$SignupInfo>): void;
   generateSignupUrl(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SignupInfo>,
       callback?: BodyResponseCallback<Schema$SignupInfo>):
       void|AxiosPromise<Schema$SignupInfo> {
@@ -2465,11 +2467,11 @@ export class Resource$Enterprises {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Enterprise>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Enterprise>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Enterprise>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Enterprise>,
       callback?: BodyResponseCallback<Schema$Enterprise>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Enterprise>,
       callback?: BodyResponseCallback<Schema$Enterprise>):
       void|AxiosPromise<Schema$Enterprise> {
@@ -2516,15 +2518,15 @@ export class Resource$Enterprises {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getAndroidDevicePolicyConfig(params: any, options?: MethodOptions):
+  getAndroidDevicePolicyConfig(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AndroidDevicePolicyConfig>;
   getAndroidDevicePolicyConfig(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AndroidDevicePolicyConfig>,
       callback?: BodyResponseCallback<Schema$AndroidDevicePolicyConfig>): void;
   getAndroidDevicePolicyConfig(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AndroidDevicePolicyConfig>,
       callback?: BodyResponseCallback<Schema$AndroidDevicePolicyConfig>):
@@ -2585,14 +2587,14 @@ export class Resource$Enterprises {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getServiceAccount(params: any, options?: MethodOptions):
+  getServiceAccount(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ServiceAccount>;
   getServiceAccount(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ServiceAccount>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ServiceAccount>,
       callback?: BodyResponseCallback<Schema$ServiceAccount>): void;
   getServiceAccount(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ServiceAccount>,
       callback?: BodyResponseCallback<Schema$ServiceAccount>):
       void|AxiosPromise<Schema$ServiceAccount> {
@@ -2642,14 +2644,14 @@ export class Resource$Enterprises {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getStoreLayout(params: any, options?: MethodOptions):
+  getStoreLayout(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$StoreLayout>;
   getStoreLayout(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$StoreLayout>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$StoreLayout>,
       callback?: BodyResponseCallback<Schema$StoreLayout>): void;
   getStoreLayout(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$StoreLayout>,
       callback?: BodyResponseCallback<Schema$StoreLayout>):
       void|AxiosPromise<Schema$StoreLayout> {
@@ -2700,13 +2702,14 @@ export class Resource$Enterprises {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Enterprise>;
+  insert(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Enterprise>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Enterprise>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Enterprise>,
       callback?: BodyResponseCallback<Schema$Enterprise>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Enterprise>,
       callback?: BodyResponseCallback<Schema$Enterprise>):
       void|AxiosPromise<Schema$Enterprise> {
@@ -2757,15 +2760,15 @@ export class Resource$Enterprises {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$EnterprisesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$EnterprisesListResponse>,
       callback?: BodyResponseCallback<Schema$EnterprisesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$EnterprisesListResponse>,
       callback?: BodyResponseCallback<Schema$EnterprisesListResponse>):
@@ -2826,14 +2829,14 @@ export class Resource$Enterprises {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  pullNotificationSet(params: any, options?: MethodOptions):
+  pullNotificationSet(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$NotificationSet>;
   pullNotificationSet(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$NotificationSet>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$NotificationSet>,
       callback?: BodyResponseCallback<Schema$NotificationSet>): void;
   pullNotificationSet(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$NotificationSet>,
       callback?: BodyResponseCallback<Schema$NotificationSet>):
       void|AxiosPromise<Schema$NotificationSet> {
@@ -2882,16 +2885,16 @@ export class Resource$Enterprises {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  sendTestPushNotification(params: any, options?: MethodOptions):
+  sendTestPushNotification(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$EnterprisesSendTestPushNotificationResponse>;
   sendTestPushNotification(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$EnterprisesSendTestPushNotificationResponse>,
       callback?: BodyResponseCallback<
           Schema$EnterprisesSendTestPushNotificationResponse>): void;
   sendTestPushNotification(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$EnterprisesSendTestPushNotificationResponse>,
       callback?: BodyResponseCallback<
@@ -2946,14 +2949,14 @@ export class Resource$Enterprises {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setAccount(params: any, options?: MethodOptions):
+  setAccount(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$EnterpriseAccount>;
   setAccount(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$EnterpriseAccount>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$EnterpriseAccount>,
       callback?: BodyResponseCallback<Schema$EnterpriseAccount>): void;
   setAccount(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$EnterpriseAccount>,
       callback?: BodyResponseCallback<Schema$EnterpriseAccount>):
       void|AxiosPromise<Schema$EnterpriseAccount> {
@@ -3005,15 +3008,15 @@ export class Resource$Enterprises {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setAndroidDevicePolicyConfig(params: any, options?: MethodOptions):
+  setAndroidDevicePolicyConfig(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AndroidDevicePolicyConfig>;
   setAndroidDevicePolicyConfig(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AndroidDevicePolicyConfig>,
       callback?: BodyResponseCallback<Schema$AndroidDevicePolicyConfig>): void;
   setAndroidDevicePolicyConfig(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AndroidDevicePolicyConfig>,
       callback?: BodyResponseCallback<Schema$AndroidDevicePolicyConfig>):
@@ -3070,14 +3073,14 @@ export class Resource$Enterprises {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setStoreLayout(params: any, options?: MethodOptions):
+  setStoreLayout(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$StoreLayout>;
   setStoreLayout(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$StoreLayout>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$StoreLayout>,
       callback?: BodyResponseCallback<Schema$StoreLayout>): void;
   setStoreLayout(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$StoreLayout>,
       callback?: BodyResponseCallback<Schema$StoreLayout>):
       void|AxiosPromise<Schema$StoreLayout> {
@@ -3126,12 +3129,12 @@ export class Resource$Enterprises {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  unenroll(params: any, options?: MethodOptions): AxiosPromise<void>;
+  unenroll(params?: any, options?: MethodOptions): AxiosPromise<void>;
   unenroll(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   unenroll(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -3191,12 +3194,12 @@ export class Resource$Entitlements {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -3245,11 +3248,11 @@ export class Resource$Entitlements {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Entitlement>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Entitlement>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Entitlement>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Entitlement>,
       callback?: BodyResponseCallback<Schema$Entitlement>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Entitlement>,
       callback?: BodyResponseCallback<Schema$Entitlement>):
       void|AxiosPromise<Schema$Entitlement> {
@@ -3299,15 +3302,15 @@ export class Resource$Entitlements {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$EntitlementsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$EntitlementsListResponse>,
       callback?: BodyResponseCallback<Schema$EntitlementsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$EntitlementsListResponse>,
       callback?: BodyResponseCallback<Schema$EntitlementsListResponse>):
@@ -3362,13 +3365,14 @@ export class Resource$Entitlements {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Entitlement>;
+  patch(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Entitlement>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Entitlement>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Entitlement>,
       callback?: BodyResponseCallback<Schema$Entitlement>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Entitlement>,
       callback?: BodyResponseCallback<Schema$Entitlement>):
       void|AxiosPromise<Schema$Entitlement> {
@@ -3421,14 +3425,14 @@ export class Resource$Entitlements {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Entitlement>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Entitlement>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Entitlement>,
       callback?: BodyResponseCallback<Schema$Entitlement>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Entitlement>,
       callback?: BodyResponseCallback<Schema$Entitlement>):
       void|AxiosPromise<Schema$Entitlement> {
@@ -3490,11 +3494,11 @@ export class Resource$Grouplicenses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$GroupLicense>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GroupLicense>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$GroupLicense>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GroupLicense>,
       callback?: BodyResponseCallback<Schema$GroupLicense>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GroupLicense>,
       callback?: BodyResponseCallback<Schema$GroupLicense>):
       void|AxiosPromise<Schema$GroupLicense> {
@@ -3544,15 +3548,15 @@ export class Resource$Grouplicenses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GroupLicensesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GroupLicensesListResponse>,
       callback?: BodyResponseCallback<Schema$GroupLicensesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GroupLicensesListResponse>,
       callback?: BodyResponseCallback<Schema$GroupLicensesListResponse>):
@@ -3616,16 +3620,16 @@ export class Resource$Grouplicenseusers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GroupLicenseUsersListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GroupLicenseUsersListResponse>,
       callback?: BodyResponseCallback<Schema$GroupLicenseUsersListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GroupLicenseUsersListResponse>,
       callback?: BodyResponseCallback<Schema$GroupLicenseUsersListResponse>):
@@ -3692,12 +3696,12 @@ export class Resource$Installs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -3747,10 +3751,12 @@ export class Resource$Installs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Install>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Install>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Install>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Install>,
       callback?: BodyResponseCallback<Schema$Install>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Install>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Install>,
       callback?: BodyResponseCallback<Schema$Install>):
       void|AxiosPromise<Schema$Install> {
     if (typeof options === 'function') {
@@ -3800,14 +3806,14 @@ export class Resource$Installs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstallsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InstallsListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InstallsListResponse>,
       callback?: BodyResponseCallback<Schema$InstallsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InstallsListResponse>,
       callback?: BodyResponseCallback<Schema$InstallsListResponse>):
       void|AxiosPromise<Schema$InstallsListResponse> {
@@ -3862,12 +3868,14 @@ export class Resource$Installs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Install>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Install>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Install>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Install>,
       callback?: BodyResponseCallback<Schema$Install>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Install>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Install>,
       callback?: BodyResponseCallback<Schema$Install>):
       void|AxiosPromise<Schema$Install> {
     if (typeof options === 'function') {
@@ -3921,12 +3929,14 @@ export class Resource$Installs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Install>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Install>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Install>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Install>,
       callback?: BodyResponseCallback<Schema$Install>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Install>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Install>,
       callback?: BodyResponseCallback<Schema$Install>):
       void|AxiosPromise<Schema$Install> {
     if (typeof options === 'function') {
@@ -3990,12 +4000,12 @@ export class Resource$Managedconfigurationsfordevice {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -4049,12 +4059,12 @@ export class Resource$Managedconfigurationsfordevice {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$ManagedConfiguration>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ManagedConfiguration>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ManagedConfiguration>,
       callback?: BodyResponseCallback<Schema$ManagedConfiguration>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ManagedConfiguration>,
       callback?: BodyResponseCallback<Schema$ManagedConfiguration>):
       void|AxiosPromise<Schema$ManagedConfiguration> {
@@ -4110,16 +4120,16 @@ export class Resource$Managedconfigurationsfordevice {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ManagedConfigurationsForDeviceListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ManagedConfigurationsForDeviceListResponse>,
       callback?: BodyResponseCallback<
           Schema$ManagedConfigurationsForDeviceListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ManagedConfigurationsForDeviceListResponse>,
       callback?: BodyResponseCallback<
@@ -4177,14 +4187,14 @@ export class Resource$Managedconfigurationsfordevice {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ManagedConfiguration>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ManagedConfiguration>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ManagedConfiguration>,
       callback?: BodyResponseCallback<Schema$ManagedConfiguration>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ManagedConfiguration>,
       callback?: BodyResponseCallback<Schema$ManagedConfiguration>):
       void|AxiosPromise<Schema$ManagedConfiguration> {
@@ -4242,14 +4252,14 @@ export class Resource$Managedconfigurationsfordevice {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ManagedConfiguration>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ManagedConfiguration>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ManagedConfiguration>,
       callback?: BodyResponseCallback<Schema$ManagedConfiguration>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ManagedConfiguration>,
       callback?: BodyResponseCallback<Schema$ManagedConfiguration>):
       void|AxiosPromise<Schema$ManagedConfiguration> {
@@ -4317,12 +4327,12 @@ export class Resource$Managedconfigurationsforuser {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -4373,12 +4383,12 @@ export class Resource$Managedconfigurationsforuser {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$ManagedConfiguration>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ManagedConfiguration>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ManagedConfiguration>,
       callback?: BodyResponseCallback<Schema$ManagedConfiguration>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ManagedConfiguration>,
       callback?: BodyResponseCallback<Schema$ManagedConfiguration>):
       void|AxiosPromise<Schema$ManagedConfiguration> {
@@ -4430,16 +4440,16 @@ export class Resource$Managedconfigurationsforuser {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ManagedConfigurationsForUserListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ManagedConfigurationsForUserListResponse>,
       callback?: BodyResponseCallback<
           Schema$ManagedConfigurationsForUserListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ManagedConfigurationsForUserListResponse>,
       callback?: BodyResponseCallback<
@@ -4500,14 +4510,14 @@ export class Resource$Managedconfigurationsforuser {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ManagedConfiguration>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ManagedConfiguration>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ManagedConfiguration>,
       callback?: BodyResponseCallback<Schema$ManagedConfiguration>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ManagedConfiguration>,
       callback?: BodyResponseCallback<Schema$ManagedConfiguration>):
       void|AxiosPromise<Schema$ManagedConfiguration> {
@@ -4565,14 +4575,14 @@ export class Resource$Managedconfigurationsforuser {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ManagedConfiguration>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ManagedConfiguration>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ManagedConfiguration>,
       callback?: BodyResponseCallback<Schema$ManagedConfiguration>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ManagedConfiguration>,
       callback?: BodyResponseCallback<Schema$ManagedConfiguration>):
       void|AxiosPromise<Schema$ManagedConfiguration> {
@@ -4636,16 +4646,16 @@ export class Resource$Managedconfigurationssettings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ManagedConfigurationsSettingsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ManagedConfigurationsSettingsListResponse>,
       callback?: BodyResponseCallback<
           Schema$ManagedConfigurationsSettingsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ManagedConfigurationsSettingsListResponse>,
       callback?: BodyResponseCallback<
@@ -4712,11 +4722,11 @@ export class Resource$Permissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Permission>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Permission>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Permission>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Permission>,
       callback?: BodyResponseCallback<Schema$Permission>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Permission>,
       callback?: BodyResponseCallback<Schema$Permission>):
       void|AxiosPromise<Schema$Permission> {
@@ -4781,12 +4791,12 @@ export class Resource$Products {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  approve(params: any, options?: MethodOptions): AxiosPromise<void>;
+  approve(params?: any, options?: MethodOptions): AxiosPromise<void>;
   approve(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   approve(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -4842,17 +4852,17 @@ export class Resource$Products {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  generateApprovalUrl(params: any, options?: MethodOptions):
+  generateApprovalUrl(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ProductsGenerateApprovalUrlResponse>;
   generateApprovalUrl(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ProductsGenerateApprovalUrlResponse>,
       callback?:
           BodyResponseCallback<Schema$ProductsGenerateApprovalUrlResponse>):
       void;
   generateApprovalUrl(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ProductsGenerateApprovalUrlResponse>,
       callback?:
@@ -4907,10 +4917,12 @@ export class Resource$Products {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Product>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Product>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Product>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Product>,
       callback?: BodyResponseCallback<Schema$Product>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Product>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Product>,
       callback?: BodyResponseCallback<Schema$Product>):
       void|AxiosPromise<Schema$Product> {
     if (typeof options === 'function') {
@@ -4965,14 +4977,15 @@ export class Resource$Products {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getAppRestrictionsSchema(params: any, options?: MethodOptions):
+  getAppRestrictionsSchema(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AppRestrictionsSchema>;
   getAppRestrictionsSchema(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AppRestrictionsSchema>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$AppRestrictionsSchema>,
       callback?: BodyResponseCallback<Schema$AppRestrictionsSchema>): void;
   getAppRestrictionsSchema(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AppRestrictionsSchema>,
       callback?: BodyResponseCallback<Schema$AppRestrictionsSchema>):
@@ -5023,14 +5036,14 @@ export class Resource$Products {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getPermissions(params: any, options?: MethodOptions):
+  getPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ProductPermissions>;
   getPermissions(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ProductPermissions>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ProductPermissions>,
       callback?: BodyResponseCallback<Schema$ProductPermissions>): void;
   getPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ProductPermissions>,
       callback?: BodyResponseCallback<Schema$ProductPermissions>):
       void|AxiosPromise<Schema$ProductPermissions> {
@@ -5085,14 +5098,14 @@ export class Resource$Products {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ProductsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ProductsListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ProductsListResponse>,
       callback?: BodyResponseCallback<Schema$ProductsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ProductsListResponse>,
       callback?: BodyResponseCallback<Schema$ProductsListResponse>):
       void|AxiosPromise<Schema$ProductsListResponse> {
@@ -5142,12 +5155,12 @@ export class Resource$Products {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  unapprove(params: any, options?: MethodOptions): AxiosPromise<void>;
+  unapprove(params?: any, options?: MethodOptions): AxiosPromise<void>;
   unapprove(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   unapprove(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -5211,12 +5224,12 @@ export class Resource$Serviceaccountkeys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -5268,14 +5281,14 @@ export class Resource$Serviceaccountkeys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ServiceAccountKey>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ServiceAccountKey>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ServiceAccountKey>,
       callback?: BodyResponseCallback<Schema$ServiceAccountKey>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ServiceAccountKey>,
       callback?: BodyResponseCallback<Schema$ServiceAccountKey>):
       void|AxiosPromise<Schema$ServiceAccountKey> {
@@ -5328,16 +5341,16 @@ export class Resource$Serviceaccountkeys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ServiceAccountKeysListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ServiceAccountKeysListResponse>,
       callback?: BodyResponseCallback<Schema$ServiceAccountKeysListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ServiceAccountKeysListResponse>,
       callback?: BodyResponseCallback<Schema$ServiceAccountKeysListResponse>):
@@ -5403,12 +5416,12 @@ export class Resource$Storelayoutclusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -5457,11 +5470,11 @@ export class Resource$Storelayoutclusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$StoreCluster>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$StoreCluster>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$StoreCluster>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$StoreCluster>,
       callback?: BodyResponseCallback<Schema$StoreCluster>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$StoreCluster>,
       callback?: BodyResponseCallback<Schema$StoreCluster>):
       void|AxiosPromise<Schema$StoreCluster> {
@@ -5512,14 +5525,14 @@ export class Resource$Storelayoutclusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$StoreCluster>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$StoreCluster>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$StoreCluster>,
       callback?: BodyResponseCallback<Schema$StoreCluster>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$StoreCluster>,
       callback?: BodyResponseCallback<Schema$StoreCluster>):
       void|AxiosPromise<Schema$StoreCluster> {
@@ -5569,16 +5582,16 @@ export class Resource$Storelayoutclusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$StoreLayoutClustersListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$StoreLayoutClustersListResponse>,
       callback?: BodyResponseCallback<Schema$StoreLayoutClustersListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$StoreLayoutClustersListResponse>,
       callback?: BodyResponseCallback<Schema$StoreLayoutClustersListResponse>):
@@ -5633,14 +5646,14 @@ export class Resource$Storelayoutclusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$StoreCluster>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$StoreCluster>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$StoreCluster>,
       callback?: BodyResponseCallback<Schema$StoreCluster>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$StoreCluster>,
       callback?: BodyResponseCallback<Schema$StoreCluster>):
       void|AxiosPromise<Schema$StoreCluster> {
@@ -5692,14 +5705,14 @@ export class Resource$Storelayoutclusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$StoreCluster>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$StoreCluster>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$StoreCluster>,
       callback?: BodyResponseCallback<Schema$StoreCluster>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$StoreCluster>,
       callback?: BodyResponseCallback<Schema$StoreCluster>):
       void|AxiosPromise<Schema$StoreCluster> {
@@ -5761,12 +5774,12 @@ export class Resource$Storelayoutpages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -5814,11 +5827,11 @@ export class Resource$Storelayoutpages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$StorePage>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$StorePage>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$StorePage>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$StorePage>,
       callback?: BodyResponseCallback<Schema$StorePage>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$StorePage>,
       callback?: BodyResponseCallback<Schema$StorePage>):
       void|AxiosPromise<Schema$StorePage> {
@@ -5868,13 +5881,13 @@ export class Resource$Storelayoutpages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$StorePage>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$StorePage>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$StorePage>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$StorePage>,
       callback?: BodyResponseCallback<Schema$StorePage>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$StorePage>,
       callback?: BodyResponseCallback<Schema$StorePage>):
       void|AxiosPromise<Schema$StorePage> {
@@ -5923,16 +5936,16 @@ export class Resource$Storelayoutpages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$StoreLayoutPagesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$StoreLayoutPagesListResponse>,
       callback?: BodyResponseCallback<Schema$StoreLayoutPagesListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$StoreLayoutPagesListResponse>,
       callback?: BodyResponseCallback<Schema$StoreLayoutPagesListResponse>):
@@ -5986,13 +5999,13 @@ export class Resource$Storelayoutpages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$StorePage>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$StorePage>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$StorePage>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$StorePage>,
       callback?: BodyResponseCallback<Schema$StorePage>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$StorePage>,
       callback?: BodyResponseCallback<Schema$StorePage>):
       void|AxiosPromise<Schema$StorePage> {
@@ -6043,13 +6056,13 @@ export class Resource$Storelayoutpages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$StorePage>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$StorePage>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$StorePage>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$StorePage>,
       callback?: BodyResponseCallback<Schema$StorePage>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$StorePage>,
       callback?: BodyResponseCallback<Schema$StorePage>):
       void|AxiosPromise<Schema$StorePage> {
@@ -6111,12 +6124,12 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -6167,14 +6180,14 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  generateAuthenticationToken(params: any, options?: MethodOptions):
+  generateAuthenticationToken(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AuthenticationToken>;
   generateAuthenticationToken(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AuthenticationToken>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AuthenticationToken>,
       callback?: BodyResponseCallback<Schema$AuthenticationToken>): void;
   generateAuthenticationToken(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AuthenticationToken>,
       callback?: BodyResponseCallback<Schema$AuthenticationToken>):
       void|AxiosPromise<Schema$AuthenticationToken> {
@@ -6226,14 +6239,14 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  generateToken(params: any, options?: MethodOptions):
+  generateToken(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$UserToken>;
   generateToken(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UserToken>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UserToken>,
       callback?: BodyResponseCallback<Schema$UserToken>): void;
   generateToken(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UserToken>,
       callback?: BodyResponseCallback<Schema$UserToken>):
       void|AxiosPromise<Schema$UserToken> {
@@ -6283,10 +6296,10 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$User>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$User>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$User>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$User>,
       callback?: BodyResponseCallback<Schema$User>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$User>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$User>,
       callback?: BodyResponseCallback<Schema$User>):
       void|AxiosPromise<Schema$User> {
     if (typeof options === 'function') {
@@ -6335,14 +6348,14 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getAvailableProductSet(params: any, options?: MethodOptions):
+  getAvailableProductSet(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ProductSet>;
   getAvailableProductSet(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ProductSet>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ProductSet>,
       callback?: BodyResponseCallback<Schema$ProductSet>): void;
   getAvailableProductSet(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ProductSet>,
       callback?: BodyResponseCallback<Schema$ProductSet>):
       void|AxiosPromise<Schema$ProductSet> {
@@ -6396,12 +6409,12 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$User>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$User>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$User>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$User>,
       callback?: BodyResponseCallback<Schema$User>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$User>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$User>,
       callback?: BodyResponseCallback<Schema$User>):
       void|AxiosPromise<Schema$User> {
     if (typeof options === 'function') {
@@ -6451,14 +6464,14 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$UsersListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UsersListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UsersListResponse>,
       callback?: BodyResponseCallback<Schema$UsersListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UsersListResponse>,
       callback?: BodyResponseCallback<Schema$UsersListResponse>):
       void|AxiosPromise<Schema$UsersListResponse> {
@@ -6512,12 +6525,12 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$User>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$User>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$User>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$User>,
       callback?: BodyResponseCallback<Schema$User>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$User>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$User>,
       callback?: BodyResponseCallback<Schema$User>):
       void|AxiosPromise<Schema$User> {
     if (typeof options === 'function') {
@@ -6568,12 +6581,12 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  revokeDeviceAccess(params: any, options?: MethodOptions): AxiosPromise<void>;
+  revokeDeviceAccess(params?: any, options?: MethodOptions): AxiosPromise<void>;
   revokeDeviceAccess(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   revokeDeviceAccess(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -6621,12 +6634,12 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  revokeToken(params: any, options?: MethodOptions): AxiosPromise<void>;
+  revokeToken(params?: any, options?: MethodOptions): AxiosPromise<void>;
   revokeToken(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   revokeToken(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -6678,14 +6691,14 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setAvailableProductSet(params: any, options?: MethodOptions):
+  setAvailableProductSet(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ProductSet>;
   setAvailableProductSet(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ProductSet>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ProductSet>,
       callback?: BodyResponseCallback<Schema$ProductSet>): void;
   setAvailableProductSet(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ProductSet>,
       callback?: BodyResponseCallback<Schema$ProductSet>):
       void|AxiosPromise<Schema$ProductSet> {
@@ -6740,12 +6753,12 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$User>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$User>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$User>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$User>,
       callback?: BodyResponseCallback<Schema$User>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$User>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$User>,
       callback?: BodyResponseCallback<Schema$User>):
       void|AxiosPromise<Schema$User> {
     if (typeof options === 'function') {
diff --git a/src/apis/androidmanagement/v1.ts b/src/apis/androidmanagement/v1.ts
index e92ea9c350..d1fc35f3d0 100644
--- a/src/apis/androidmanagement/v1.ts
+++ b/src/apis/androidmanagement/v1.ts
@@ -1678,13 +1678,14 @@ export class Resource$Enterprises {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Enterprise>;
+  create(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Enterprise>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Enterprise>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Enterprise>,
       callback?: BodyResponseCallback<Schema$Enterprise>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Enterprise>,
       callback?: BodyResponseCallback<Schema$Enterprise>):
       void|AxiosPromise<Schema$Enterprise> {
@@ -1731,11 +1732,11 @@ export class Resource$Enterprises {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Enterprise>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Enterprise>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Enterprise>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Enterprise>,
       callback?: BodyResponseCallback<Schema$Enterprise>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Enterprise>,
       callback?: BodyResponseCallback<Schema$Enterprise>):
       void|AxiosPromise<Schema$Enterprise> {
@@ -1784,13 +1785,13 @@ export class Resource$Enterprises {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Enterprise>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Enterprise>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Enterprise>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Enterprise>,
       callback?: BodyResponseCallback<Schema$Enterprise>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Enterprise>,
       callback?: BodyResponseCallback<Schema$Enterprise>):
       void|AxiosPromise<Schema$Enterprise> {
@@ -1849,11 +1850,11 @@ export class Resource$Enterprises$Applications {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Application>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Application>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Application>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Application>,
       callback?: BodyResponseCallback<Schema$Application>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Application>,
       callback?: BodyResponseCallback<Schema$Application>):
       void|AxiosPromise<Schema$Application> {
@@ -1914,12 +1915,12 @@ export class Resource$Enterprises$Devices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1965,10 +1966,10 @@ export class Resource$Enterprises$Devices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Device>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Device>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Device>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Device>,
       callback?: BodyResponseCallback<Schema$Device>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Device>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Device>,
       callback?: BodyResponseCallback<Schema$Device>):
       void|AxiosPromise<Schema$Device> {
     if (typeof options === 'function') {
@@ -2017,14 +2018,14 @@ export class Resource$Enterprises$Devices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  issueCommand(params: any, options?: MethodOptions):
+  issueCommand(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   issueCommand(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   issueCommand(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2074,14 +2075,14 @@ export class Resource$Enterprises$Devices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListDevicesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListDevicesResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListDevicesResponse>,
       callback?: BodyResponseCallback<Schema$ListDevicesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListDevicesResponse>,
       callback?: BodyResponseCallback<Schema$ListDevicesResponse>):
       void|AxiosPromise<Schema$ListDevicesResponse> {
@@ -2131,12 +2132,12 @@ export class Resource$Enterprises$Devices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Device>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Device>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Device>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Device>,
       callback?: BodyResponseCallback<Schema$Device>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Device>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Device>,
       callback?: BodyResponseCallback<Schema$Device>):
       void|AxiosPromise<Schema$Device> {
     if (typeof options === 'function') {
@@ -2201,12 +2202,12 @@ export class Resource$Enterprises$Devices$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancel(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  cancel(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   cancel(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   cancel(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2255,12 +2256,12 @@ export class Resource$Enterprises$Devices$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2308,11 +2309,11 @@ export class Resource$Enterprises$Devices$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2370,15 +2371,15 @@ export class Resource$Enterprises$Devices$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListOperationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>):
@@ -2440,14 +2441,14 @@ export class Resource$Enterprises$Enrollmenttokens {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$EnrollmentToken>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$EnrollmentToken>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$EnrollmentToken>,
       callback?: BodyResponseCallback<Schema$EnrollmentToken>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$EnrollmentToken>,
       callback?: BodyResponseCallback<Schema$EnrollmentToken>):
       void|AxiosPromise<Schema$EnrollmentToken> {
@@ -2496,12 +2497,12 @@ export class Resource$Enterprises$Enrollmenttokens {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2560,12 +2561,12 @@ export class Resource$Enterprises$Policies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2611,10 +2612,10 @@ export class Resource$Enterprises$Policies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Policy>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Policy>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -2662,14 +2663,14 @@ export class Resource$Enterprises$Policies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListPoliciesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListPoliciesResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListPoliciesResponse>,
       callback?: BodyResponseCallback<Schema$ListPoliciesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListPoliciesResponse>,
       callback?: BodyResponseCallback<Schema$ListPoliciesResponse>):
       void|AxiosPromise<Schema$ListPoliciesResponse> {
@@ -2719,12 +2720,12 @@ export class Resource$Enterprises$Policies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Policy>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Policy>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -2784,12 +2785,13 @@ export class Resource$Enterprises$Webtokens {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$WebToken>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$WebToken>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$WebToken>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$WebToken>,
       callback?: BodyResponseCallback<Schema$WebToken>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$WebToken>,
       callback?: BodyResponseCallback<Schema$WebToken>):
       void|AxiosPromise<Schema$WebToken> {
@@ -2851,13 +2853,13 @@ export class Resource$Signupurls {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$SignupUrl>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$SignupUrl>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SignupUrl>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SignupUrl>,
       callback?: BodyResponseCallback<Schema$SignupUrl>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SignupUrl>,
       callback?: BodyResponseCallback<Schema$SignupUrl>):
       void|AxiosPromise<Schema$SignupUrl> {
diff --git a/src/apis/androidpublisher/v1.1.ts b/src/apis/androidpublisher/v1.1.ts
index 14d97b9738..ab56b41cd1 100644
--- a/src/apis/androidpublisher/v1.1.ts
+++ b/src/apis/androidpublisher/v1.1.ts
@@ -160,11 +160,12 @@ export class Resource$Inapppurchases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$InappPurchase>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InappPurchase>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$InappPurchase>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InappPurchase>,
       callback?: BodyResponseCallback<Schema$InappPurchase>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InappPurchase>,
       callback?: BodyResponseCallback<Schema$InappPurchase>):
       void|AxiosPromise<Schema$InappPurchase> {
@@ -228,12 +229,12 @@ export class Resource$Purchases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancel(params: any, options?: MethodOptions): AxiosPromise<void>;
+  cancel(params?: any, options?: MethodOptions): AxiosPromise<void>;
   cancel(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   cancel(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -283,12 +284,12 @@ export class Resource$Purchases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$SubscriptionPurchase>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SubscriptionPurchase>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SubscriptionPurchase>,
       callback?: BodyResponseCallback<Schema$SubscriptionPurchase>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SubscriptionPurchase>,
       callback?: BodyResponseCallback<Schema$SubscriptionPurchase>):
       void|AxiosPromise<Schema$SubscriptionPurchase> {
diff --git a/src/apis/androidpublisher/v1.ts b/src/apis/androidpublisher/v1.ts
index e83d901db3..0dd626e838 100644
--- a/src/apis/androidpublisher/v1.ts
+++ b/src/apis/androidpublisher/v1.ts
@@ -117,12 +117,12 @@ export class Resource$Purchases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancel(params: any, options?: MethodOptions): AxiosPromise<void>;
+  cancel(params?: any, options?: MethodOptions): AxiosPromise<void>;
   cancel(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   cancel(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -172,12 +172,12 @@ export class Resource$Purchases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$SubscriptionPurchase>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SubscriptionPurchase>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SubscriptionPurchase>,
       callback?: BodyResponseCallback<Schema$SubscriptionPurchase>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SubscriptionPurchase>,
       callback?: BodyResponseCallback<Schema$SubscriptionPurchase>):
       void|AxiosPromise<Schema$SubscriptionPurchase> {
diff --git a/src/apis/androidpublisher/v2.ts b/src/apis/androidpublisher/v2.ts
deleted file mode 100644
index 74b6258e3d..0000000000
--- a/src/apis/androidpublisher/v2.ts
+++ /dev/null
@@ -1,4270 +0,0 @@
-/**
- * Copyright 2015 Google Inc. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-import {AxiosPromise} from 'axios';
-
-import {GoogleApis} from '../..';
-import {BodyResponseCallback, GlobalOptions, MethodOptions} from '../../lib/api';
-import {createAPIRequest} from '../../lib/apirequest';
-
-// TODO: We will eventually get the `any` in here cleared out, but in the
-// interim we want to turn on no-implicit-any.
-
-// tslint:disable: no-any
-// tslint:disable: class-name
-// tslint:disable: variable-name
-// tslint:disable: jsdoc-format
-
-/**
- * Google Play Developer API
- *
- * Lets Android application developers access their Google Play accounts.
- *
- * @example
- * const google = require('googleapis');
- * const androidpublisher = google.androidpublisher('v2');
- *
- * @namespace androidpublisher
- * @type {Function}
- * @version v2
- * @variation v2
- * @param {object=} options Options for Androidpublisher
- */
-export class Androidpublisher {
-  _options: GlobalOptions;
-  google: GoogleApis;
-  root = this;
-
-  edits: Resource$Edits;
-  inappproducts: Resource$Inappproducts;
-  purchases: Resource$Purchases;
-  reviews: Resource$Reviews;
-
-  constructor(options: GlobalOptions, google: GoogleApis) {
-    this._options = options || {};
-    this.google = google;
-    this.getRoot.bind(this);
-
-    this.edits = new Resource$Edits(this);
-    this.inappproducts = new Resource$Inappproducts(this);
-    this.purchases = new Resource$Purchases(this);
-    this.reviews = new Resource$Reviews(this);
-  }
-
-  getRoot() {
-    return this.root;
-  }
-}
-
-export interface Schema$Apk {
-  /**
-   * Information about the binary payload of this APK.
-   */
-  binary: Schema$ApkBinary;
-  /**
-   * The version code of the APK, as specified in the APK&#39;s manifest file.
-   */
-  versionCode: number;
-}
-/**
- * Represents the binary payload of an APK.
- */
-export interface Schema$ApkBinary {
-  /**
-   * A sha1 hash of the APK payload, encoded as a hex string and matching the
-   * output of the sha1sum command.
-   */
-  sha1: string;
-  /**
-   * A sha256 hash of the APK payload, encoded as a hex string and matching the
-   * output of the sha256sum command.
-   */
-  sha256: string;
-}
-export interface Schema$ApkListing {
-  /**
-   * The language code, in BCP 47 format (eg &quot;en-US&quot;).
-   */
-  language: string;
-  /**
-   * Describe what&#39;s new in your APK.
-   */
-  recentChanges: string;
-}
-export interface Schema$ApkListingsListResponse {
-  /**
-   * Identifies what kind of resource this is. Value: the fixed string
-   * &quot;androidpublisher#apkListingsListResponse&quot;.
-   */
-  kind: string;
-  listings: Schema$ApkListing[];
-}
-export interface Schema$ApksAddExternallyHostedRequest {
-  /**
-   * The definition of the externally-hosted APK and where it is located.
-   */
-  externallyHostedApk: Schema$ExternallyHostedApk;
-}
-export interface Schema$ApksAddExternallyHostedResponse {
-  /**
-   * The definition of the externally-hosted APK and where it is located.
-   */
-  externallyHostedApk: Schema$ExternallyHostedApk;
-}
-export interface Schema$ApksListResponse {
-  apks: Schema$Apk[];
-  /**
-   * Identifies what kind of resource this is. Value: the fixed string
-   * &quot;androidpublisher#apksListResponse&quot;.
-   */
-  kind: string;
-}
-export interface Schema$AppDetails {
-  /**
-   * The user-visible support email for this app.
-   */
-  contactEmail: string;
-  /**
-   * The user-visible support telephone number for this app.
-   */
-  contactPhone: string;
-  /**
-   * The user-visible website for this app.
-   */
-  contactWebsite: string;
-  /**
-   * Default language code, in BCP 47 format (eg &quot;en-US&quot;).
-   */
-  defaultLanguage: string;
-}
-/**
- * Represents an edit of an app. An edit allows clients to make multiple changes
- * before committing them in one operation.
- */
-export interface Schema$AppEdit {
-  /**
-   * The time at which the edit will expire and will be no longer valid for use
-   * in any subsequent API calls (encoded as seconds since the Epoch).
-   */
-  expiryTimeSeconds: string;
-  /**
-   * The ID of the edit that can be used in subsequent API calls.
-   */
-  id: string;
-}
-export interface Schema$Comment {
-  /**
-   * A comment from a developer.
-   */
-  developerComment: Schema$DeveloperComment;
-  /**
-   * A comment from a user.
-   */
-  userComment: Schema$UserComment;
-}
-/**
- * Represents a deobfuscation file.
- */
-export interface Schema$DeobfuscationFile {
-  /**
-   * The type of the deobfuscation file.
-   */
-  symbolType: string;
-}
-export interface Schema$DeobfuscationFilesUploadResponse {
-  deobfuscationFile: Schema$DeobfuscationFile;
-}
-export interface Schema$DeveloperComment {
-  /**
-   * The last time at which this comment was updated.
-   */
-  lastModified: Schema$Timestamp;
-  /**
-   * The content of the comment, i.e. reply body.
-   */
-  text: string;
-}
-export interface Schema$DeviceMetadata {
-  /**
-   * Device CPU make e.g. &quot;Qualcomm&quot;
-   */
-  cpuMake: string;
-  /**
-   * Device CPU model e.g. &quot;MSM8974&quot;
-   */
-  cpuModel: string;
-  /**
-   * Device class (e.g. tablet)
-   */
-  deviceClass: string;
-  /**
-   * OpenGL version
-   */
-  glEsVersion: number;
-  /**
-   * Device manufacturer (e.g. Motorola)
-   */
-  manufacturer: string;
-  /**
-   * Comma separated list of native platforms (e.g. &quot;arm&quot;,
-   * &quot;arm7&quot;)
-   */
-  nativePlatform: string;
-  /**
-   * Device model name (e.g. Droid)
-   */
-  productName: string;
-  /**
-   * Device RAM in Megabytes e.g. &quot;2048&quot;
-   */
-  ramMb: number;
-  /**
-   * Screen density in DPI
-   */
-  screenDensityDpi: number;
-  /**
-   * Screen height in pixels
-   */
-  screenHeightPx: number;
-  /**
-   * Screen width in pixels
-   */
-  screenWidthPx: number;
-}
-export interface Schema$ExpansionFile {
-  /**
-   * If set this field indicates that this APK has an Expansion File uploaded to
-   * it: this APK does not reference another APK&#39;s Expansion File. The
-   * field&#39;s value is the size of the uploaded Expansion File in bytes.
-   */
-  fileSize: string;
-  /**
-   * If set this APK&#39;s Expansion File references another APK&#39;s Expansion
-   * File. The file_size field will not be set.
-   */
-  referencesVersion: number;
-}
-export interface Schema$ExpansionFilesUploadResponse {
-  expansionFile: Schema$ExpansionFile;
-}
-/**
- * Defines an APK available for this application that is hosted externally and
- * not uploaded to Google Play. This function is only available to enterprises
- * who are using Google Play for Work, and whos application is restricted to the
- * enterprise private channel
- */
-export interface Schema$ExternallyHostedApk {
-  /**
-   * The application label.
-   */
-  applicationLabel: string;
-  /**
-   * A certificate (or array of certificates if a certificate-chain is used)
-   * used to signed this APK, represented as a base64 encoded byte array.
-   */
-  certificateBase64s: string[];
-  /**
-   * The URL at which the APK is hosted. This must be an https URL.
-   */
-  externallyHostedUrl: string;
-  /**
-   * The SHA1 checksum of this APK, represented as a base64 encoded byte array.
-   */
-  fileSha1Base64: string;
-  /**
-   * The SHA256 checksum of this APK, represented as a base64 encoded byte
-   * array.
-   */
-  fileSha256Base64: string;
-  /**
-   * The file size in bytes of this APK.
-   */
-  fileSize: string;
-  /**
-   * The icon image from the APK, as a base64 encoded byte array.
-   */
-  iconBase64: string;
-  /**
-   * The maximum SDK supported by this APK (optional).
-   */
-  maximumSdk: number;
-  /**
-   * The minimum SDK targeted by this APK.
-   */
-  minimumSdk: number;
-  /**
-   * The native code environments supported by this APK (optional).
-   */
-  nativeCodes: string[];
-  /**
-   * The package name.
-   */
-  packageName: string;
-  /**
-   * The features required by this APK (optional).
-   */
-  usesFeatures: string[];
-  /**
-   * The permissions requested by this APK.
-   */
-  usesPermissions: Schema$ExternallyHostedApkUsesPermission[];
-  /**
-   * The version code of this APK.
-   */
-  versionCode: number;
-  /**
-   * The version name of this APK.
-   */
-  versionName: string;
-}
-/**
- * A permission used by this APK.
- */
-export interface Schema$ExternallyHostedApkUsesPermission {
-  /**
-   * Optionally, the maximum SDK version for which the permission is required.
-   */
-  maxSdkVersion: number;
-  /**
-   * The name of the permission requested.
-   */
-  name: string;
-}
-export interface Schema$Image {
-  /**
-   * A unique id representing this image.
-   */
-  id: string;
-  /**
-   * A sha1 hash of the image that was uploaded.
-   */
-  sha1: string;
-  /**
-   * A URL that will serve a preview of the image.
-   */
-  url: string;
-}
-export interface Schema$ImagesDeleteAllResponse { deleted: Schema$Image[]; }
-export interface Schema$ImagesListResponse { images: Schema$Image[]; }
-export interface Schema$ImagesUploadResponse { image: Schema$Image; }
-export interface Schema$InAppProduct {
-  /**
-   * The default language of the localized data, as defined by BCP 47. e.g.
-   * &quot;en-US&quot;, &quot;en-GB&quot;.
-   */
-  defaultLanguage: string;
-  /**
-   * Default price cannot be zero. In-app products can never be free. Default
-   * price is always in the developer&#39;s Checkout merchant currency.
-   */
-  defaultPrice: Schema$Price;
-  /**
-   * List of localized title and description data.
-   */
-  listings: any;
-  /**
-   * The package name of the parent app.
-   */
-  packageName: string;
-  /**
-   * Prices per buyer region. None of these prices should be zero. In-app
-   * products can never be free.
-   */
-  prices: any;
-  /**
-   * Purchase type enum value. Unmodifiable after creation.
-   */
-  purchaseType: string;
-  /**
-   * Definition of a season for a seasonal subscription. Can be defined only for
-   * yearly subscriptions.
-   */
-  season: Schema$Season;
-  /**
-   * The stock-keeping-unit (SKU) of the product, unique within an app.
-   */
-  sku: string;
-  status: string;
-  /**
-   * Subscription period, specified in ISO 8601 format. Acceptable values are
-   * &quot;P1W&quot; (one week), &quot;P1M&quot; (one month), &quot;P3M&quot;
-   * (three months), &quot;P6M&quot; (six months), and &quot;P1Y&quot; (one
-   * year).
-   */
-  subscriptionPeriod: string;
-  /**
-   * Trial period, specified in ISO 8601 format. Acceptable values are anything
-   * between &quot;P7D&quot; (seven days) and &quot;P999D&quot; (999 days).
-   * Seasonal subscriptions cannot have a trial period.
-   */
-  trialPeriod: string;
-}
-export interface Schema$InAppProductListing {
-  description: string;
-  title: string;
-}
-export interface Schema$InappproductsListResponse {
-  inappproduct: Schema$InAppProduct[];
-  /**
-   * Identifies what kind of resource this is. Value: the fixed string
-   * &quot;androidpublisher#inappproductsListResponse&quot;.
-   */
-  kind: string;
-  pageInfo: Schema$PageInfo;
-  tokenPagination: Schema$TokenPagination;
-}
-export interface Schema$Listing {
-  /**
-   * Full description of the app; this may be up to 4000 characters in length.
-   */
-  fullDescription: string;
-  /**
-   * Language localization code (for example, &quot;de-AT&quot; for Austrian
-   * German).
-   */
-  language: string;
-  /**
-   * Short description of the app (previously known as promo text); this may be
-   * up to 80 characters in length.
-   */
-  shortDescription: string;
-  /**
-   * App&#39;s localized title.
-   */
-  title: string;
-  /**
-   * URL of a promotional YouTube video for the app.
-   */
-  video: string;
-}
-export interface Schema$ListingsListResponse {
-  /**
-   * Identifies what kind of resource this is. Value: the fixed string
-   * &quot;androidpublisher#listingsListResponse&quot;.
-   */
-  kind: string;
-  listings: Schema$Listing[];
-}
-export interface Schema$MonthDay {
-  /**
-   * Day of a month, value in [1, 31] range. Valid range depends on the
-   * specified month.
-   */
-  day: number;
-  /**
-   * Month of a year. e.g. 1 = JAN, 2 = FEB etc.
-   */
-  month: number;
-}
-export interface Schema$PageInfo {
-  resultPerPage: number;
-  startIndex: number;
-  totalResults: number;
-}
-export interface Schema$Price {
-  /**
-   * 3 letter Currency code, as defined by ISO 4217.
-   */
-  currency: string;
-  /**
-   * The price in millionths of the currency base unit represented as a string.
-   */
-  priceMicros: string;
-}
-/**
- * A ProductPurchase resource indicates the status of a user&#39;s inapp product
- * purchase.
- */
-export interface Schema$ProductPurchase {
-  /**
-   * The consumption state of the inapp product. Possible values are:   - Yet to
-   * be consumed  - Consumed
-   */
-  consumptionState: number;
-  /**
-   * A developer-specified string that contains supplemental information about
-   * an order.
-   */
-  developerPayload: string;
-  /**
-   * This kind represents an inappPurchase object in the androidpublisher
-   * service.
-   */
-  kind: string;
-  /**
-   * The order id associated with the purchase of the inapp product.
-   */
-  orderId: string;
-  /**
-   * The purchase state of the order. Possible values are:   - Purchased  -
-   * Canceled
-   */
-  purchaseState: number;
-  /**
-   * The time the product was purchased, in milliseconds since the epoch (Jan 1,
-   * 1970).
-   */
-  purchaseTimeMillis: string;
-  /**
-   * The type of purchase of the inapp product. This field is only set if this
-   * purchase was not made using the standard in-app billing flow. Possible
-   * values are:   - Test (i.e. purchased from a license testing account)  -
-   * Promo (i.e. purchased using a promo code)
-   */
-  purchaseType: number;
-}
-export interface Schema$Prorate {
-  /**
-   * Default price cannot be zero and must be less than the full subscription
-   * price. Default price is always in the developer&#39;s Checkout merchant
-   * currency. Targeted countries have their prices set automatically based on
-   * the default_price.
-   */
-  defaultPrice: Schema$Price;
-  /**
-   * Defines the first day on which the price takes effect.
-   */
-  start: Schema$MonthDay;
-}
-export interface Schema$Review {
-  /**
-   * The name of the user who wrote the review.
-   */
-  authorName: string;
-  /**
-   * A repeated field containing comments for the review.
-   */
-  comments: Schema$Comment[];
-  /**
-   * Unique identifier for this review.
-   */
-  reviewId: string;
-}
-export interface Schema$ReviewReplyResult {
-  /**
-   * The time at which the reply took effect.
-   */
-  lastEdited: Schema$Timestamp;
-  /**
-   * The reply text that was applied.
-   */
-  replyText: string;
-}
-export interface Schema$ReviewsListResponse {
-  pageInfo: Schema$PageInfo;
-  reviews: Schema$Review[];
-  tokenPagination: Schema$TokenPagination;
-}
-export interface Schema$ReviewsReplyRequest {
-  /**
-   * The text to set as the reply. Replies of more than approximately 350
-   * characters will be rejected. HTML tags will be stripped.
-   */
-  replyText: string;
-}
-export interface Schema$ReviewsReplyResponse {
-  result: Schema$ReviewReplyResult;
-}
-export interface Schema$Season {
-  /**
-   * Inclusive end date of the recurrence period.
-   */
-  end: Schema$MonthDay;
-  /**
-   * Optionally present list of prorations for the season. Each proration is a
-   * one-off discounted entry into a subscription. Each proration contains the
-   * first date on which the discount is available and the new pricing
-   * information.
-   */
-  prorations: Schema$Prorate[];
-  /**
-   * Inclusive start date of the recurrence period.
-   */
-  start: Schema$MonthDay;
-}
-/**
- * A SubscriptionDeferralInfo contains the data needed to defer a subscription
- * purchase to a future expiry time.
- */
-export interface Schema$SubscriptionDeferralInfo {
-  /**
-   * The desired next expiry time to assign to the subscription, in milliseconds
-   * since the Epoch. The given time must be later/greater than the current
-   * expiry time for the subscription.
-   */
-  desiredExpiryTimeMillis: string;
-  /**
-   * The expected expiry time for the subscription. If the current expiry time
-   * for the subscription is not the value specified here, the deferral will not
-   * occur.
-   */
-  expectedExpiryTimeMillis: string;
-}
-/**
- * A SubscriptionPurchase resource indicates the status of a user&#39;s
- * subscription purchase.
- */
-export interface Schema$SubscriptionPurchase {
-  /**
-   * Whether the subscription will automatically be renewed when it reaches its
-   * current expiry time.
-   */
-  autoRenewing: boolean;
-  /**
-   * The reason why a subscription was canceled or is not auto-renewing.
-   * Possible values are:   - User canceled the subscription  - Subscription was
-   * canceled by the system, for example because of a billing problem  -
-   * Subscription was replaced with a new subscription  - Subscription was
-   * canceled by the developer
-   */
-  cancelReason: number;
-  /**
-   * ISO 3166-1 alpha-2 billing country/region code of the user at the time the
-   * subscription was granted.
-   */
-  countryCode: string;
-  /**
-   * A developer-specified string that contains supplemental information about
-   * an order.
-   */
-  developerPayload: string;
-  /**
-   * The email address of the user when the subscription was purchased. Only
-   * present for purchases made with &#39;Subscribe with Google&#39;.
-   */
-  emailAddress: string;
-  /**
-   * Time at which the subscription will expire, in milliseconds since the
-   * Epoch.
-   */
-  expiryTimeMillis: string;
-  /**
-   * The family name of the user when the subscription was purchased. Only
-   * present for purchases made with &#39;Subscribe with Google&#39;.
-   */
-  familyName: string;
-  /**
-   * The given name of the user when the subscription was purchased. Only
-   * present for purchases made with &#39;Subscribe with Google&#39;.
-   */
-  givenName: string;
-  /**
-   * This kind represents a subscriptionPurchase object in the androidpublisher
-   * service.
-   */
-  kind: string;
-  /**
-   * The purchase token of the originating purchase if this subscription is one
-   * of the following:   - Re-signup of a canceled but non-lapsed subscription
-   * - Upgrade/downgrade from a previous subscription  For example, suppose a
-   * user originally signs up and you receive purchase token X, then the user
-   * cancels and goes through the resignup flow (before their subscription
-   * lapses) and you receive purchase token Y, and finally the user upgrades
-   * their subscription and you receive purchase token Z. If you call this API
-   * with purchase token Z, this field will be set to Y. If you call this API
-   * with purchase token Y, this field will be set to X. If you call this API
-   * with purchase token X, this field will not be set.
-   */
-  linkedPurchaseToken: string;
-  /**
-   * The order id of the latest recurring order associated with the purchase of
-   * the subscription.
-   */
-  orderId: string;
-  /**
-   * The payment state of the subscription. Possible values are:   - Payment
-   * pending  - Payment received  - Free trial
-   */
-  paymentState: number;
-  /**
-   * Price of the subscription, not including tax. Price is expressed in
-   * micro-units, where 1,000,000 micro-units represents one unit of the
-   * currency. For example, if the subscription price is €1.99,
-   * price_amount_micros is 1990000.
-   */
-  priceAmountMicros: string;
-  /**
-   * ISO 4217 currency code for the subscription price. For example, if the
-   * price is specified in British pounds sterling, price_currency_code is
-   * &quot;GBP&quot;.
-   */
-  priceCurrencyCode: string;
-  /**
-   * The profile id of the user when the subscription was purchased. Only
-   * present for purchases made with &#39;Subscribe with Google&#39;.
-   */
-  profileId: string;
-  /**
-   * The profile name of the user when the subscription was purchased. Only
-   * present for purchases made with &#39;Subscribe with Google&#39;.
-   */
-  profileName: string;
-  /**
-   * The type of purchase of the subscription. This field is only set if this
-   * purchase was not made using the standard in-app billing flow. Possible
-   * values are:   - Test (i.e. purchased from a license testing account)
-   */
-  purchaseType: number;
-  /**
-   * Time at which the subscription was granted, in milliseconds since the
-   * Epoch.
-   */
-  startTimeMillis: string;
-  /**
-   * The time at which the subscription was canceled by the user, in
-   * milliseconds since the epoch. Only present if cancelReason is 0.
-   */
-  userCancellationTimeMillis: string;
-}
-export interface Schema$SubscriptionPurchasesDeferRequest {
-  /**
-   * The information about the new desired expiry time for the subscription.
-   */
-  deferralInfo: Schema$SubscriptionDeferralInfo;
-}
-export interface Schema$SubscriptionPurchasesDeferResponse {
-  /**
-   * The new expiry time for the subscription in milliseconds since the Epoch.
-   */
-  newExpiryTimeMillis: string;
-}
-export interface Schema$Testers {
-  googleGroups: string[];
-  googlePlusCommunities: string[];
-}
-export interface Schema$Timestamp {
-  nanos: number;
-  seconds: string;
-}
-export interface Schema$TokenPagination {
-  nextPageToken: string;
-  previousPageToken: string;
-}
-export interface Schema$Track {
-  /**
-   * Identifier for this track. One of &quot;alpha&quot;, &quot;beta&quot;,
-   * &quot;production&quot;, &quot;rollout&quot; or &quot;internal&quot;.
-   */
-  track: string;
-  userFraction: number;
-  versionCodes: number[];
-}
-export interface Schema$TracksListResponse {
-  /**
-   * Identifies what kind of resource this is. Value: the fixed string
-   * &quot;androidpublisher#tracksListResponse&quot;.
-   */
-  kind: string;
-  tracks: Schema$Track[];
-}
-export interface Schema$UserComment {
-  /**
-   * Integer Android SDK version of the user&#39;s device at the time the review
-   * was written, e.g. 23 is Marshmallow. May be absent.
-   */
-  androidOsVersion: number;
-  /**
-   * Integer version code of the app as installed at the time the review was
-   * written. May be absent.
-   */
-  appVersionCode: number;
-  /**
-   * String version name of the app as installed at the time the review was
-   * written. May be absent.
-   */
-  appVersionName: string;
-  /**
-   * Codename for the reviewer&#39;s device, e.g. klte, flounder. May be absent.
-   */
-  device: string;
-  /**
-   * Some information about the characteristics of the user&#39;s device
-   */
-  deviceMetadata: Schema$DeviceMetadata;
-  /**
-   * The last time at which this comment was updated.
-   */
-  lastModified: Schema$Timestamp;
-  /**
-   * Untranslated text of the review, in the case where the review has been
-   * translated. If the review has not been translated this is left blank.
-   */
-  originalText: string;
-  /**
-   * Language code for the reviewer. This is taken from the device settings so
-   * is not guaranteed to match the language the review is written in. May be
-   * absent.
-   */
-  reviewerLanguage: string;
-  /**
-   * The star rating associated with the review, from 1 to 5.
-   */
-  starRating: number;
-  /**
-   * The content of the comment, i.e. review body. In some cases users have been
-   * able to write a review with separate title and body; in those cases the
-   * title and body are concatenated and separated by a tab character.
-   */
-  text: string;
-  /**
-   * Number of users who have given this review a thumbs down
-   */
-  thumbsDownCount: number;
-  /**
-   * Number of users who have given this review a thumbs up
-   */
-  thumbsUpCount: number;
-}
-/**
- * A VoidedPurchase resource indicates a purchase that was either
- * canceled/refunded/charged-back.
- */
-export interface Schema$VoidedPurchase {
-  /**
-   * This kind represents a voided purchase object in the androidpublisher
-   * service.
-   */
-  kind: string;
-  /**
-   * The time at which the purchase was made, in milliseconds since the epoch
-   * (Jan 1, 1970).
-   */
-  purchaseTimeMillis: string;
-  /**
-   * The token that was generated when a purchase was made. This uniquely
-   * identifies a purchase.
-   */
-  purchaseToken: string;
-  /**
-   * The time at which the purchase was canceled/refunded/charged-back, in
-   * milliseconds since the epoch (Jan 1, 1970).
-   */
-  voidedTimeMillis: string;
-}
-export interface Schema$VoidedPurchasesListResponse {
-  pageInfo: Schema$PageInfo;
-  tokenPagination: Schema$TokenPagination;
-  voidedPurchases: Schema$VoidedPurchase[];
-}
-
-export class Resource$Edits {
-  root: Androidpublisher;
-  apklistings: Resource$Edits$Apklistings;
-  apks: Resource$Edits$Apks;
-  deobfuscationfiles: Resource$Edits$Deobfuscationfiles;
-  details: Resource$Edits$Details;
-  expansionfiles: Resource$Edits$Expansionfiles;
-  images: Resource$Edits$Images;
-  listings: Resource$Edits$Listings;
-  testers: Resource$Edits$Testers;
-  tracks: Resource$Edits$Tracks;
-  constructor(root: Androidpublisher) {
-    this.root = root;
-    this.getRoot.bind(this);
-    this.apklistings = new Resource$Edits$Apklistings(root);
-    this.apks = new Resource$Edits$Apks(root);
-    this.deobfuscationfiles = new Resource$Edits$Deobfuscationfiles(root);
-    this.details = new Resource$Edits$Details(root);
-    this.expansionfiles = new Resource$Edits$Expansionfiles(root);
-    this.images = new Resource$Edits$Images(root);
-    this.listings = new Resource$Edits$Listings(root);
-    this.testers = new Resource$Edits$Testers(root);
-    this.tracks = new Resource$Edits$Tracks(root);
-  }
-
-  getRoot() {
-    return this.root;
-  }
-
-
-  /**
-   * androidpublisher.edits.commit
-   * @desc Commits/applies the changes made in this edit back to the app.
-   * @alias androidpublisher.edits.commit
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.editId Unique identifier for this edit.
-   * @param {string} params.packageName Unique identifier for the Android app that is being updated; for example, "com.spiffygame".
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  commit(params: any, options?: MethodOptions): AxiosPromise<Schema$AppEdit>;
-  commit(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$AppEdit>,
-      callback?: BodyResponseCallback<Schema$AppEdit>): void;
-  commit(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$AppEdit>,
-      callback?: BodyResponseCallback<Schema$AppEdit>):
-      void|AxiosPromise<Schema$AppEdit> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/edits/{editId}:commit')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'POST'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'editId'],
-      pathParams: ['editId', 'packageName'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$AppEdit>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$AppEdit>(parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.edits.delete
-   * @desc Deletes an edit for an app. Creating a new edit will automatically
-   * delete any of your previous edits so this method need only be called if you
-   * want to preemptively abandon an edit.
-   * @alias androidpublisher.edits.delete
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.editId Unique identifier for this edit.
-   * @param {string} params.packageName Unique identifier for the Android app that is being updated; for example, "com.spiffygame".
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
-  delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
-      callback?: BodyResponseCallback<void>): void;
-  delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
-      callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/edits/{editId}')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'DELETE'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'editId'],
-      pathParams: ['editId', 'packageName'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<void>(parameters, callback);
-    } else {
-      return createAPIRequest<void>(parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.edits.get
-   * @desc Returns information about the edit specified. Calls will fail if the
-   * edit is no long active (e.g. has been deleted, superseded or expired).
-   * @alias androidpublisher.edits.get
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.editId Unique identifier for this edit.
-   * @param {string} params.packageName Unique identifier for the Android app that is being updated; for example, "com.spiffygame".
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$AppEdit>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$AppEdit>,
-      callback?: BodyResponseCallback<Schema$AppEdit>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$AppEdit>,
-      callback?: BodyResponseCallback<Schema$AppEdit>):
-      void|AxiosPromise<Schema$AppEdit> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/edits/{editId}')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'GET'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'editId'],
-      pathParams: ['editId', 'packageName'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$AppEdit>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$AppEdit>(parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.edits.insert
-   * @desc Creates a new edit for an app, populated with the app's current
-   * state.
-   * @alias androidpublisher.edits.insert
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.packageName Unique identifier for the Android app that is being updated; for example, "com.spiffygame".
-   * @param {().AppEdit} params.resource Request body data
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$AppEdit>;
-  insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$AppEdit>,
-      callback?: BodyResponseCallback<Schema$AppEdit>): void;
-  insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$AppEdit>,
-      callback?: BodyResponseCallback<Schema$AppEdit>):
-      void|AxiosPromise<Schema$AppEdit> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url: (rootUrl +
-                  '/androidpublisher/v2/applications/{packageName}/edits')
-                     .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'POST'
-          },
-          options),
-      params,
-      requiredParams: ['packageName'],
-      pathParams: ['packageName'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$AppEdit>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$AppEdit>(parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.edits.validate
-   * @desc Checks that the edit can be successfully committed. The edit's
-   * changes are not applied to the live app.
-   * @alias androidpublisher.edits.validate
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.editId Unique identifier for this edit.
-   * @param {string} params.packageName Unique identifier for the Android app that is being updated; for example, "com.spiffygame".
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  validate(params: any, options?: MethodOptions): AxiosPromise<Schema$AppEdit>;
-  validate(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$AppEdit>,
-      callback?: BodyResponseCallback<Schema$AppEdit>): void;
-  validate(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$AppEdit>,
-      callback?: BodyResponseCallback<Schema$AppEdit>):
-      void|AxiosPromise<Schema$AppEdit> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/edits/{editId}:validate')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'POST'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'editId'],
-      pathParams: ['editId', 'packageName'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$AppEdit>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$AppEdit>(parameters);
-    }
-  }
-}
-export class Resource$Edits$Apklistings {
-  root: Androidpublisher;
-  constructor(root: Androidpublisher) {
-    this.root = root;
-    this.getRoot.bind(this);
-  }
-
-  getRoot() {
-    return this.root;
-  }
-
-
-  /**
-   * androidpublisher.edits.apklistings.delete
-   * @desc Deletes the APK-specific localized listing for a specified APK and
-   * language code.
-   * @alias androidpublisher.edits.apklistings.delete
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {integer} params.apkVersionCode The APK version code whose APK-specific listings should be read or modified.
-   * @param {string} params.editId Unique identifier for this edit.
-   * @param {string} params.language The language code (a BCP-47 language tag) of the APK-specific localized listing to read or modify. For example, to select Austrian German, pass "de-AT".
-   * @param {string} params.packageName Unique identifier for the Android app that is being updated; for example, "com.spiffygame".
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
-  delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
-      callback?: BodyResponseCallback<void>): void;
-  delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
-      callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/edits/{editId}/apks/{apkVersionCode}/listings/{language}')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'DELETE'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'editId', 'apkVersionCode', 'language'],
-      pathParams: ['apkVersionCode', 'editId', 'language', 'packageName'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<void>(parameters, callback);
-    } else {
-      return createAPIRequest<void>(parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.edits.apklistings.deleteall
-   * @desc Deletes all the APK-specific localized listings for a specified APK.
-   * @alias androidpublisher.edits.apklistings.deleteall
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {integer} params.apkVersionCode The APK version code whose APK-specific listings should be read or modified.
-   * @param {string} params.editId Unique identifier for this edit.
-   * @param {string} params.packageName Unique identifier for the Android app that is being updated; for example, "com.spiffygame".
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  deleteall(params: any, options?: MethodOptions): AxiosPromise<void>;
-  deleteall(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
-      callback?: BodyResponseCallback<void>): void;
-  deleteall(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
-      callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/edits/{editId}/apks/{apkVersionCode}/listings')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'DELETE'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'editId', 'apkVersionCode'],
-      pathParams: ['apkVersionCode', 'editId', 'packageName'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<void>(parameters, callback);
-    } else {
-      return createAPIRequest<void>(parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.edits.apklistings.get
-   * @desc Fetches the APK-specific localized listing for a specified APK and
-   * language code.
-   * @alias androidpublisher.edits.apklistings.get
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {integer} params.apkVersionCode The APK version code whose APK-specific listings should be read or modified.
-   * @param {string} params.editId Unique identifier for this edit.
-   * @param {string} params.language The language code (a BCP-47 language tag) of the APK-specific localized listing to read or modify. For example, to select Austrian German, pass "de-AT".
-   * @param {string} params.packageName Unique identifier for the Android app that is being updated; for example, "com.spiffygame".
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$ApkListing>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ApkListing>,
-      callback?: BodyResponseCallback<Schema$ApkListing>): void;
-  get(params: any,
-      options?: MethodOptions|BodyResponseCallback<Schema$ApkListing>,
-      callback?: BodyResponseCallback<Schema$ApkListing>):
-      void|AxiosPromise<Schema$ApkListing> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/edits/{editId}/apks/{apkVersionCode}/listings/{language}')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'GET'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'editId', 'apkVersionCode', 'language'],
-      pathParams: ['apkVersionCode', 'editId', 'language', 'packageName'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$ApkListing>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$ApkListing>(parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.edits.apklistings.list
-   * @desc Lists all the APK-specific localized listings for a specified APK.
-   * @alias androidpublisher.edits.apklistings.list
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {integer} params.apkVersionCode The APK version code whose APK-specific listings should be read or modified.
-   * @param {string} params.editId Unique identifier for this edit.
-   * @param {string} params.packageName Unique identifier for the Android app that is being updated; for example, "com.spiffygame".
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  list(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$ApkListingsListResponse>;
-  list(
-      params: any,
-      options: MethodOptions|
-      BodyResponseCallback<Schema$ApkListingsListResponse>,
-      callback?: BodyResponseCallback<Schema$ApkListingsListResponse>): void;
-  list(
-      params: any,
-      options?: MethodOptions|
-      BodyResponseCallback<Schema$ApkListingsListResponse>,
-      callback?: BodyResponseCallback<Schema$ApkListingsListResponse>):
-      void|AxiosPromise<Schema$ApkListingsListResponse> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/edits/{editId}/apks/{apkVersionCode}/listings')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'GET'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'editId', 'apkVersionCode'],
-      pathParams: ['apkVersionCode', 'editId', 'packageName'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$ApkListingsListResponse>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$ApkListingsListResponse>(parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.edits.apklistings.patch
-   * @desc Updates or creates the APK-specific localized listing for a specified
-   * APK and language code. This method supports patch semantics.
-   * @alias androidpublisher.edits.apklistings.patch
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {integer} params.apkVersionCode The APK version code whose APK-specific listings should be read or modified.
-   * @param {string} params.editId Unique identifier for this edit.
-   * @param {string} params.language The language code (a BCP-47 language tag) of the APK-specific localized listing to read or modify. For example, to select Austrian German, pass "de-AT".
-   * @param {string} params.packageName Unique identifier for the Android app that is being updated; for example, "com.spiffygame".
-   * @param {().ApkListing} params.resource Request body data
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$ApkListing>;
-  patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ApkListing>,
-      callback?: BodyResponseCallback<Schema$ApkListing>): void;
-  patch(
-      params: any,
-      options?: MethodOptions|BodyResponseCallback<Schema$ApkListing>,
-      callback?: BodyResponseCallback<Schema$ApkListing>):
-      void|AxiosPromise<Schema$ApkListing> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/edits/{editId}/apks/{apkVersionCode}/listings/{language}')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'PATCH'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'editId', 'apkVersionCode', 'language'],
-      pathParams: ['apkVersionCode', 'editId', 'language', 'packageName'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$ApkListing>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$ApkListing>(parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.edits.apklistings.update
-   * @desc Updates or creates the APK-specific localized listing for a specified
-   * APK and language code.
-   * @alias androidpublisher.edits.apklistings.update
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {integer} params.apkVersionCode The APK version code whose APK-specific listings should be read or modified.
-   * @param {string} params.editId Unique identifier for this edit.
-   * @param {string} params.language The language code (a BCP-47 language tag) of the APK-specific localized listing to read or modify. For example, to select Austrian German, pass "de-AT".
-   * @param {string} params.packageName Unique identifier for the Android app that is being updated; for example, "com.spiffygame".
-   * @param {().ApkListing} params.resource Request body data
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$ApkListing>;
-  update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ApkListing>,
-      callback?: BodyResponseCallback<Schema$ApkListing>): void;
-  update(
-      params: any,
-      options?: MethodOptions|BodyResponseCallback<Schema$ApkListing>,
-      callback?: BodyResponseCallback<Schema$ApkListing>):
-      void|AxiosPromise<Schema$ApkListing> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/edits/{editId}/apks/{apkVersionCode}/listings/{language}')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'PUT'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'editId', 'apkVersionCode', 'language'],
-      pathParams: ['apkVersionCode', 'editId', 'language', 'packageName'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$ApkListing>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$ApkListing>(parameters);
-    }
-  }
-}
-
-export class Resource$Edits$Apks {
-  root: Androidpublisher;
-  constructor(root: Androidpublisher) {
-    this.root = root;
-    this.getRoot.bind(this);
-  }
-
-  getRoot() {
-    return this.root;
-  }
-
-
-  /**
-   * androidpublisher.edits.apks.addexternallyhosted
-   * @desc Creates a new APK without uploading the APK itself to Google Play,
-   * instead hosting the APK at a specified URL. This function is only available
-   * to enterprises using Google Play for Work whose application is configured
-   * to restrict distribution to the enterprise domain.
-   * @alias androidpublisher.edits.apks.addexternallyhosted
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.editId Unique identifier for this edit.
-   * @param {string} params.packageName Unique identifier for the Android app that is being updated; for example, "com.spiffygame".
-   * @param {().ApksAddExternallyHostedRequest} params.resource Request body data
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  addexternallyhosted(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$ApksAddExternallyHostedResponse>;
-  addexternallyhosted(
-      params: any,
-      options: MethodOptions|
-      BodyResponseCallback<Schema$ApksAddExternallyHostedResponse>,
-      callback?: BodyResponseCallback<Schema$ApksAddExternallyHostedResponse>):
-      void;
-  addexternallyhosted(
-      params: any,
-      options?: MethodOptions|
-      BodyResponseCallback<Schema$ApksAddExternallyHostedResponse>,
-      callback?: BodyResponseCallback<Schema$ApksAddExternallyHostedResponse>):
-      void|AxiosPromise<Schema$ApksAddExternallyHostedResponse> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/edits/{editId}/apks/externallyHosted')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'POST'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'editId'],
-      pathParams: ['editId', 'packageName'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$ApksAddExternallyHostedResponse>(
-          parameters, callback);
-    } else {
-      return createAPIRequest<Schema$ApksAddExternallyHostedResponse>(
-          parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.edits.apks.list
-   * @alias androidpublisher.edits.apks.list
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.editId Unique identifier for this edit.
-   * @param {string} params.packageName Unique identifier for the Android app that is being updated; for example, "com.spiffygame".
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  list(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$ApksListResponse>;
-  list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ApksListResponse>,
-      callback?: BodyResponseCallback<Schema$ApksListResponse>): void;
-  list(
-      params: any,
-      options?: MethodOptions|BodyResponseCallback<Schema$ApksListResponse>,
-      callback?: BodyResponseCallback<Schema$ApksListResponse>):
-      void|AxiosPromise<Schema$ApksListResponse> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/edits/{editId}/apks')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'GET'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'editId'],
-      pathParams: ['editId', 'packageName'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$ApksListResponse>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$ApksListResponse>(parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.edits.apks.upload
-   * @alias androidpublisher.edits.apks.upload
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.editId Unique identifier for this edit.
-   * @param {string} params.packageName Unique identifier for the Android app that is being updated; for example, "com.spiffygame".
-   * @param {object} params.media Media object
-   * @param {string} params.media.mimeType Media mime-type
-   * @param {string|object} params.media.body Media body contents
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  upload(params: any, options?: MethodOptions): AxiosPromise<Schema$Apk>;
-  upload(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Apk>,
-      callback?: BodyResponseCallback<Schema$Apk>): void;
-  upload(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Apk>,
-      callback?: BodyResponseCallback<Schema$Apk>):
-      void|AxiosPromise<Schema$Apk> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/edits/{editId}/apks')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'POST'
-          },
-          options),
-      params,
-      mediaUrl:
-          (rootUrl +
-           '/upload/androidpublisher/v2/applications/{packageName}/edits/{editId}/apks')
-              .replace(/([^:]\/)\/+/g, '$1'),
-      requiredParams: ['packageName', 'editId'],
-      pathParams: ['editId', 'packageName'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$Apk>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$Apk>(parameters);
-    }
-  }
-}
-
-export class Resource$Edits$Deobfuscationfiles {
-  root: Androidpublisher;
-  constructor(root: Androidpublisher) {
-    this.root = root;
-    this.getRoot.bind(this);
-  }
-
-  getRoot() {
-    return this.root;
-  }
-
-
-  /**
-   * androidpublisher.edits.deobfuscationfiles.upload
-   * @desc Uploads the deobfuscation file of the specified APK. If a
-   * deobfuscation file already exists, it will be replaced.
-   * @alias androidpublisher.edits.deobfuscationfiles.upload
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {integer} params.apkVersionCode The version code of the APK whose deobfuscation file is being uploaded.
-   * @param {string} params.deobfuscationFileType
-   * @param {string} params.editId Unique identifier for this edit.
-   * @param {string} params.packageName Unique identifier of the Android app for which the deobfuscatiuon files are being uploaded; for example, "com.spiffygame".
-   * @param {object} params.media Media object
-   * @param {string} params.media.mimeType Media mime-type
-   * @param {string|object} params.media.body Media body contents
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  upload(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$DeobfuscationFilesUploadResponse>;
-  upload(
-      params: any,
-      options: MethodOptions|
-      BodyResponseCallback<Schema$DeobfuscationFilesUploadResponse>,
-      callback?: BodyResponseCallback<Schema$DeobfuscationFilesUploadResponse>):
-      void;
-  upload(
-      params: any,
-      options?: MethodOptions|
-      BodyResponseCallback<Schema$DeobfuscationFilesUploadResponse>,
-      callback?: BodyResponseCallback<Schema$DeobfuscationFilesUploadResponse>):
-      void|AxiosPromise<Schema$DeobfuscationFilesUploadResponse> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/edits/{editId}/apks/{apkVersionCode}/deobfuscationFiles/{deobfuscationFileType}')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'POST'
-          },
-          options),
-      params,
-      mediaUrl:
-          (rootUrl +
-           '/upload/androidpublisher/v2/applications/{packageName}/edits/{editId}/apks/{apkVersionCode}/deobfuscationFiles/{deobfuscationFileType}')
-              .replace(/([^:]\/)\/+/g, '$1'),
-      requiredParams:
-          ['packageName', 'editId', 'apkVersionCode', 'deobfuscationFileType'],
-      pathParams:
-          ['apkVersionCode', 'deobfuscationFileType', 'editId', 'packageName'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$DeobfuscationFilesUploadResponse>(
-          parameters, callback);
-    } else {
-      return createAPIRequest<Schema$DeobfuscationFilesUploadResponse>(
-          parameters);
-    }
-  }
-}
-
-export class Resource$Edits$Details {
-  root: Androidpublisher;
-  constructor(root: Androidpublisher) {
-    this.root = root;
-    this.getRoot.bind(this);
-  }
-
-  getRoot() {
-    return this.root;
-  }
-
-
-  /**
-   * androidpublisher.edits.details.get
-   * @desc Fetches app details for this edit. This includes the default language
-   * and developer support contact information.
-   * @alias androidpublisher.edits.details.get
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.editId Unique identifier for this edit.
-   * @param {string} params.packageName Unique identifier for the Android app that is being updated; for example, "com.spiffygame".
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$AppDetails>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AppDetails>,
-      callback?: BodyResponseCallback<Schema$AppDetails>): void;
-  get(params: any,
-      options?: MethodOptions|BodyResponseCallback<Schema$AppDetails>,
-      callback?: BodyResponseCallback<Schema$AppDetails>):
-      void|AxiosPromise<Schema$AppDetails> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/edits/{editId}/details')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'GET'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'editId'],
-      pathParams: ['editId', 'packageName'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$AppDetails>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$AppDetails>(parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.edits.details.patch
-   * @desc Updates app details for this edit. This method supports patch
-   * semantics.
-   * @alias androidpublisher.edits.details.patch
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.editId Unique identifier for this edit.
-   * @param {string} params.packageName Unique identifier for the Android app that is being updated; for example, "com.spiffygame".
-   * @param {().AppDetails} params.resource Request body data
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$AppDetails>;
-  patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AppDetails>,
-      callback?: BodyResponseCallback<Schema$AppDetails>): void;
-  patch(
-      params: any,
-      options?: MethodOptions|BodyResponseCallback<Schema$AppDetails>,
-      callback?: BodyResponseCallback<Schema$AppDetails>):
-      void|AxiosPromise<Schema$AppDetails> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/edits/{editId}/details')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'PATCH'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'editId'],
-      pathParams: ['editId', 'packageName'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$AppDetails>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$AppDetails>(parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.edits.details.update
-   * @desc Updates app details for this edit.
-   * @alias androidpublisher.edits.details.update
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.editId Unique identifier for this edit.
-   * @param {string} params.packageName Unique identifier for the Android app that is being updated; for example, "com.spiffygame".
-   * @param {().AppDetails} params.resource Request body data
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$AppDetails>;
-  update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AppDetails>,
-      callback?: BodyResponseCallback<Schema$AppDetails>): void;
-  update(
-      params: any,
-      options?: MethodOptions|BodyResponseCallback<Schema$AppDetails>,
-      callback?: BodyResponseCallback<Schema$AppDetails>):
-      void|AxiosPromise<Schema$AppDetails> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/edits/{editId}/details')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'PUT'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'editId'],
-      pathParams: ['editId', 'packageName'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$AppDetails>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$AppDetails>(parameters);
-    }
-  }
-}
-
-export class Resource$Edits$Expansionfiles {
-  root: Androidpublisher;
-  constructor(root: Androidpublisher) {
-    this.root = root;
-    this.getRoot.bind(this);
-  }
-
-  getRoot() {
-    return this.root;
-  }
-
-
-  /**
-   * androidpublisher.edits.expansionfiles.get
-   * @desc Fetches the Expansion File configuration for the APK specified.
-   * @alias androidpublisher.edits.expansionfiles.get
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {integer} params.apkVersionCode The version code of the APK whose Expansion File configuration is being read or modified.
-   * @param {string} params.editId Unique identifier for this edit.
-   * @param {string} params.expansionFileType
-   * @param {string} params.packageName Unique identifier for the Android app that is being updated; for example, "com.spiffygame".
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$ExpansionFile>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ExpansionFile>,
-      callback?: BodyResponseCallback<Schema$ExpansionFile>): void;
-  get(params: any,
-      options?: MethodOptions|BodyResponseCallback<Schema$ExpansionFile>,
-      callback?: BodyResponseCallback<Schema$ExpansionFile>):
-      void|AxiosPromise<Schema$ExpansionFile> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/edits/{editId}/apks/{apkVersionCode}/expansionFiles/{expansionFileType}')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'GET'
-          },
-          options),
-      params,
-      requiredParams:
-          ['packageName', 'editId', 'apkVersionCode', 'expansionFileType'],
-      pathParams:
-          ['apkVersionCode', 'editId', 'expansionFileType', 'packageName'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$ExpansionFile>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$ExpansionFile>(parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.edits.expansionfiles.patch
-   * @desc Updates the APK's Expansion File configuration to reference another
-   * APK's Expansion Files. To add a new Expansion File use the Upload method.
-   * This method supports patch semantics.
-   * @alias androidpublisher.edits.expansionfiles.patch
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {integer} params.apkVersionCode The version code of the APK whose Expansion File configuration is being read or modified.
-   * @param {string} params.editId Unique identifier for this edit.
-   * @param {string} params.expansionFileType
-   * @param {string} params.packageName Unique identifier for the Android app that is being updated; for example, "com.spiffygame".
-   * @param {().ExpansionFile} params.resource Request body data
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  patch(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$ExpansionFile>;
-  patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ExpansionFile>,
-      callback?: BodyResponseCallback<Schema$ExpansionFile>): void;
-  patch(
-      params: any,
-      options?: MethodOptions|BodyResponseCallback<Schema$ExpansionFile>,
-      callback?: BodyResponseCallback<Schema$ExpansionFile>):
-      void|AxiosPromise<Schema$ExpansionFile> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/edits/{editId}/apks/{apkVersionCode}/expansionFiles/{expansionFileType}')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'PATCH'
-          },
-          options),
-      params,
-      requiredParams:
-          ['packageName', 'editId', 'apkVersionCode', 'expansionFileType'],
-      pathParams:
-          ['apkVersionCode', 'editId', 'expansionFileType', 'packageName'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$ExpansionFile>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$ExpansionFile>(parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.edits.expansionfiles.update
-   * @desc Updates the APK's Expansion File configuration to reference another
-   * APK's Expansion Files. To add a new Expansion File use the Upload method.
-   * @alias androidpublisher.edits.expansionfiles.update
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {integer} params.apkVersionCode The version code of the APK whose Expansion File configuration is being read or modified.
-   * @param {string} params.editId Unique identifier for this edit.
-   * @param {string} params.expansionFileType
-   * @param {string} params.packageName Unique identifier for the Android app that is being updated; for example, "com.spiffygame".
-   * @param {().ExpansionFile} params.resource Request body data
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  update(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$ExpansionFile>;
-  update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ExpansionFile>,
-      callback?: BodyResponseCallback<Schema$ExpansionFile>): void;
-  update(
-      params: any,
-      options?: MethodOptions|BodyResponseCallback<Schema$ExpansionFile>,
-      callback?: BodyResponseCallback<Schema$ExpansionFile>):
-      void|AxiosPromise<Schema$ExpansionFile> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/edits/{editId}/apks/{apkVersionCode}/expansionFiles/{expansionFileType}')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'PUT'
-          },
-          options),
-      params,
-      requiredParams:
-          ['packageName', 'editId', 'apkVersionCode', 'expansionFileType'],
-      pathParams:
-          ['apkVersionCode', 'editId', 'expansionFileType', 'packageName'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$ExpansionFile>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$ExpansionFile>(parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.edits.expansionfiles.upload
-   * @desc Uploads and attaches a new Expansion File to the APK specified.
-   * @alias androidpublisher.edits.expansionfiles.upload
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {integer} params.apkVersionCode The version code of the APK whose Expansion File configuration is being read or modified.
-   * @param {string} params.editId Unique identifier for this edit.
-   * @param {string} params.expansionFileType
-   * @param {string} params.packageName Unique identifier for the Android app that is being updated; for example, "com.spiffygame".
-   * @param {object} params.media Media object
-   * @param {string} params.media.mimeType Media mime-type
-   * @param {string|object} params.media.body Media body contents
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  upload(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$ExpansionFilesUploadResponse>;
-  upload(
-      params: any,
-      options: MethodOptions|
-      BodyResponseCallback<Schema$ExpansionFilesUploadResponse>,
-      callback?: BodyResponseCallback<Schema$ExpansionFilesUploadResponse>):
-      void;
-  upload(
-      params: any,
-      options?: MethodOptions|
-      BodyResponseCallback<Schema$ExpansionFilesUploadResponse>,
-      callback?: BodyResponseCallback<Schema$ExpansionFilesUploadResponse>):
-      void|AxiosPromise<Schema$ExpansionFilesUploadResponse> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/edits/{editId}/apks/{apkVersionCode}/expansionFiles/{expansionFileType}')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'POST'
-          },
-          options),
-      params,
-      mediaUrl:
-          (rootUrl +
-           '/upload/androidpublisher/v2/applications/{packageName}/edits/{editId}/apks/{apkVersionCode}/expansionFiles/{expansionFileType}')
-              .replace(/([^:]\/)\/+/g, '$1'),
-      requiredParams:
-          ['packageName', 'editId', 'apkVersionCode', 'expansionFileType'],
-      pathParams:
-          ['apkVersionCode', 'editId', 'expansionFileType', 'packageName'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$ExpansionFilesUploadResponse>(
-          parameters, callback);
-    } else {
-      return createAPIRequest<Schema$ExpansionFilesUploadResponse>(parameters);
-    }
-  }
-}
-
-export class Resource$Edits$Images {
-  root: Androidpublisher;
-  constructor(root: Androidpublisher) {
-    this.root = root;
-    this.getRoot.bind(this);
-  }
-
-  getRoot() {
-    return this.root;
-  }
-
-
-  /**
-   * androidpublisher.edits.images.delete
-   * @desc Deletes the image (specified by id) from the edit.
-   * @alias androidpublisher.edits.images.delete
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.editId Unique identifier for this edit.
-   * @param {string} params.imageId Unique identifier an image within the set of images attached to this edit.
-   * @param {string} params.imageType
-   * @param {string} params.language The language code (a BCP-47 language tag) of the localized listing whose images are to read or modified. For example, to select Austrian German, pass "de-AT".
-   * @param {string} params.packageName Unique identifier for the Android app that is being updated; for example, "com.spiffygame".
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
-  delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
-      callback?: BodyResponseCallback<void>): void;
-  delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
-      callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/edits/{editId}/listings/{language}/{imageType}/{imageId}')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'DELETE'
-          },
-          options),
-      params,
-      requiredParams:
-          ['packageName', 'editId', 'language', 'imageType', 'imageId'],
-      pathParams: ['editId', 'imageId', 'imageType', 'language', 'packageName'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<void>(parameters, callback);
-    } else {
-      return createAPIRequest<void>(parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.edits.images.deleteall
-   * @desc Deletes all images for the specified language and image type.
-   * @alias androidpublisher.edits.images.deleteall
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.editId Unique identifier for this edit.
-   * @param {string} params.imageType
-   * @param {string} params.language The language code (a BCP-47 language tag) of the localized listing whose images are to read or modified. For example, to select Austrian German, pass "de-AT".
-   * @param {string} params.packageName Unique identifier for the Android app that is being updated; for example, "com.spiffygame".
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  deleteall(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$ImagesDeleteAllResponse>;
-  deleteall(
-      params: any,
-      options: MethodOptions|
-      BodyResponseCallback<Schema$ImagesDeleteAllResponse>,
-      callback?: BodyResponseCallback<Schema$ImagesDeleteAllResponse>): void;
-  deleteall(
-      params: any,
-      options?: MethodOptions|
-      BodyResponseCallback<Schema$ImagesDeleteAllResponse>,
-      callback?: BodyResponseCallback<Schema$ImagesDeleteAllResponse>):
-      void|AxiosPromise<Schema$ImagesDeleteAllResponse> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/edits/{editId}/listings/{language}/{imageType}')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'DELETE'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'editId', 'language', 'imageType'],
-      pathParams: ['editId', 'imageType', 'language', 'packageName'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$ImagesDeleteAllResponse>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$ImagesDeleteAllResponse>(parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.edits.images.list
-   * @desc Lists all images for the specified language and image type.
-   * @alias androidpublisher.edits.images.list
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.editId Unique identifier for this edit.
-   * @param {string} params.imageType
-   * @param {string} params.language The language code (a BCP-47 language tag) of the localized listing whose images are to read or modified. For example, to select Austrian German, pass "de-AT".
-   * @param {string} params.packageName Unique identifier for the Android app that is being updated; for example, "com.spiffygame".
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  list(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$ImagesListResponse>;
-  list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ImagesListResponse>,
-      callback?: BodyResponseCallback<Schema$ImagesListResponse>): void;
-  list(
-      params: any,
-      options?: MethodOptions|BodyResponseCallback<Schema$ImagesListResponse>,
-      callback?: BodyResponseCallback<Schema$ImagesListResponse>):
-      void|AxiosPromise<Schema$ImagesListResponse> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/edits/{editId}/listings/{language}/{imageType}')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'GET'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'editId', 'language', 'imageType'],
-      pathParams: ['editId', 'imageType', 'language', 'packageName'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$ImagesListResponse>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$ImagesListResponse>(parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.edits.images.upload
-   * @desc Uploads a new image and adds it to the list of images for the
-   * specified language and image type.
-   * @alias androidpublisher.edits.images.upload
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.editId Unique identifier for this edit.
-   * @param {string} params.imageType
-   * @param {string} params.language The language code (a BCP-47 language tag) of the localized listing whose images are to read or modified. For example, to select Austrian German, pass "de-AT".
-   * @param {string} params.packageName Unique identifier for the Android app that is being updated; for example, "com.spiffygame".
-   * @param {object} params.media Media object
-   * @param {string} params.media.mimeType Media mime-type
-   * @param {string|object} params.media.body Media body contents
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  upload(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$ImagesUploadResponse>;
-  upload(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ImagesUploadResponse>,
-      callback?: BodyResponseCallback<Schema$ImagesUploadResponse>): void;
-  upload(
-      params: any,
-      options?: MethodOptions|BodyResponseCallback<Schema$ImagesUploadResponse>,
-      callback?: BodyResponseCallback<Schema$ImagesUploadResponse>):
-      void|AxiosPromise<Schema$ImagesUploadResponse> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/edits/{editId}/listings/{language}/{imageType}')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'POST'
-          },
-          options),
-      params,
-      mediaUrl:
-          (rootUrl +
-           '/upload/androidpublisher/v2/applications/{packageName}/edits/{editId}/listings/{language}/{imageType}')
-              .replace(/([^:]\/)\/+/g, '$1'),
-      requiredParams: ['packageName', 'editId', 'language', 'imageType'],
-      pathParams: ['editId', 'imageType', 'language', 'packageName'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$ImagesUploadResponse>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$ImagesUploadResponse>(parameters);
-    }
-  }
-}
-
-export class Resource$Edits$Listings {
-  root: Androidpublisher;
-  constructor(root: Androidpublisher) {
-    this.root = root;
-    this.getRoot.bind(this);
-  }
-
-  getRoot() {
-    return this.root;
-  }
-
-
-  /**
-   * androidpublisher.edits.listings.delete
-   * @desc Deletes the specified localized store listing from an edit.
-   * @alias androidpublisher.edits.listings.delete
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.editId Unique identifier for this edit.
-   * @param {string} params.language The language code (a BCP-47 language tag) of the localized listing to read or modify. For example, to select Austrian German, pass "de-AT".
-   * @param {string} params.packageName Unique identifier for the Android app that is being updated; for example, "com.spiffygame".
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
-  delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
-      callback?: BodyResponseCallback<void>): void;
-  delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
-      callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/edits/{editId}/listings/{language}')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'DELETE'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'editId', 'language'],
-      pathParams: ['editId', 'language', 'packageName'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<void>(parameters, callback);
-    } else {
-      return createAPIRequest<void>(parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.edits.listings.deleteall
-   * @desc Deletes all localized listings from an edit.
-   * @alias androidpublisher.edits.listings.deleteall
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.editId Unique identifier for this edit.
-   * @param {string} params.packageName Unique identifier for the Android app that is being updated; for example, "com.spiffygame".
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  deleteall(params: any, options?: MethodOptions): AxiosPromise<void>;
-  deleteall(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
-      callback?: BodyResponseCallback<void>): void;
-  deleteall(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
-      callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/edits/{editId}/listings')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'DELETE'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'editId'],
-      pathParams: ['editId', 'packageName'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<void>(parameters, callback);
-    } else {
-      return createAPIRequest<void>(parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.edits.listings.get
-   * @desc Fetches information about a localized store listing.
-   * @alias androidpublisher.edits.listings.get
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.editId Unique identifier for this edit.
-   * @param {string} params.language The language code (a BCP-47 language tag) of the localized listing to read or modify. For example, to select Austrian German, pass "de-AT".
-   * @param {string} params.packageName Unique identifier for the Android app that is being updated; for example, "com.spiffygame".
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Listing>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Listing>,
-      callback?: BodyResponseCallback<Schema$Listing>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Listing>,
-      callback?: BodyResponseCallback<Schema$Listing>):
-      void|AxiosPromise<Schema$Listing> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/edits/{editId}/listings/{language}')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'GET'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'editId', 'language'],
-      pathParams: ['editId', 'language', 'packageName'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$Listing>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$Listing>(parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.edits.listings.list
-   * @desc Returns all of the localized store listings attached to this edit.
-   * @alias androidpublisher.edits.listings.list
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.editId Unique identifier for this edit.
-   * @param {string} params.packageName Unique identifier for the Android app that is being updated; for example, "com.spiffygame".
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  list(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$ListingsListResponse>;
-  list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListingsListResponse>,
-      callback?: BodyResponseCallback<Schema$ListingsListResponse>): void;
-  list(
-      params: any,
-      options?: MethodOptions|BodyResponseCallback<Schema$ListingsListResponse>,
-      callback?: BodyResponseCallback<Schema$ListingsListResponse>):
-      void|AxiosPromise<Schema$ListingsListResponse> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/edits/{editId}/listings')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'GET'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'editId'],
-      pathParams: ['editId', 'packageName'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$ListingsListResponse>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$ListingsListResponse>(parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.edits.listings.patch
-   * @desc Creates or updates a localized store listing. This method supports
-   * patch semantics.
-   * @alias androidpublisher.edits.listings.patch
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.editId Unique identifier for this edit.
-   * @param {string} params.language The language code (a BCP-47 language tag) of the localized listing to read or modify. For example, to select Austrian German, pass "de-AT".
-   * @param {string} params.packageName Unique identifier for the Android app that is being updated; for example, "com.spiffygame".
-   * @param {().Listing} params.resource Request body data
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Listing>;
-  patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Listing>,
-      callback?: BodyResponseCallback<Schema$Listing>): void;
-  patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Listing>,
-      callback?: BodyResponseCallback<Schema$Listing>):
-      void|AxiosPromise<Schema$Listing> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/edits/{editId}/listings/{language}')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'PATCH'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'editId', 'language'],
-      pathParams: ['editId', 'language', 'packageName'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$Listing>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$Listing>(parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.edits.listings.update
-   * @desc Creates or updates a localized store listing.
-   * @alias androidpublisher.edits.listings.update
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.editId Unique identifier for this edit.
-   * @param {string} params.language The language code (a BCP-47 language tag) of the localized listing to read or modify. For example, to select Austrian German, pass "de-AT".
-   * @param {string} params.packageName Unique identifier for the Android app that is being updated; for example, "com.spiffygame".
-   * @param {().Listing} params.resource Request body data
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Listing>;
-  update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Listing>,
-      callback?: BodyResponseCallback<Schema$Listing>): void;
-  update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Listing>,
-      callback?: BodyResponseCallback<Schema$Listing>):
-      void|AxiosPromise<Schema$Listing> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/edits/{editId}/listings/{language}')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'PUT'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'editId', 'language'],
-      pathParams: ['editId', 'language', 'packageName'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$Listing>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$Listing>(parameters);
-    }
-  }
-}
-
-export class Resource$Edits$Testers {
-  root: Androidpublisher;
-  constructor(root: Androidpublisher) {
-    this.root = root;
-    this.getRoot.bind(this);
-  }
-
-  getRoot() {
-    return this.root;
-  }
-
-
-  /**
-   * androidpublisher.edits.testers.get
-   * @alias androidpublisher.edits.testers.get
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.editId Unique identifier for this edit.
-   * @param {string} params.packageName Unique identifier for the Android app that is being updated; for example, "com.spiffygame".
-   * @param {string} params.track The track to read or modify. Acceptable values are: "alpha", "beta", "production", "rollout" or "internal".
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Testers>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Testers>,
-      callback?: BodyResponseCallback<Schema$Testers>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Testers>,
-      callback?: BodyResponseCallback<Schema$Testers>):
-      void|AxiosPromise<Schema$Testers> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/edits/{editId}/testers/{track}')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'GET'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'editId', 'track'],
-      pathParams: ['editId', 'packageName', 'track'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$Testers>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$Testers>(parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.edits.testers.patch
-   * @alias androidpublisher.edits.testers.patch
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.editId Unique identifier for this edit.
-   * @param {string} params.packageName Unique identifier for the Android app that is being updated; for example, "com.spiffygame".
-   * @param {string} params.track The track to read or modify. Acceptable values are: "alpha", "beta", "production", "rollout" or "internal".
-   * @param {().Testers} params.resource Request body data
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Testers>;
-  patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Testers>,
-      callback?: BodyResponseCallback<Schema$Testers>): void;
-  patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Testers>,
-      callback?: BodyResponseCallback<Schema$Testers>):
-      void|AxiosPromise<Schema$Testers> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/edits/{editId}/testers/{track}')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'PATCH'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'editId', 'track'],
-      pathParams: ['editId', 'packageName', 'track'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$Testers>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$Testers>(parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.edits.testers.update
-   * @alias androidpublisher.edits.testers.update
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.editId Unique identifier for this edit.
-   * @param {string} params.packageName Unique identifier for the Android app that is being updated; for example, "com.spiffygame".
-   * @param {string} params.track The track to read or modify. Acceptable values are: "alpha", "beta", "production", "rollout" or "internal".
-   * @param {().Testers} params.resource Request body data
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Testers>;
-  update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Testers>,
-      callback?: BodyResponseCallback<Schema$Testers>): void;
-  update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Testers>,
-      callback?: BodyResponseCallback<Schema$Testers>):
-      void|AxiosPromise<Schema$Testers> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/edits/{editId}/testers/{track}')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'PUT'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'editId', 'track'],
-      pathParams: ['editId', 'packageName', 'track'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$Testers>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$Testers>(parameters);
-    }
-  }
-}
-
-export class Resource$Edits$Tracks {
-  root: Androidpublisher;
-  constructor(root: Androidpublisher) {
-    this.root = root;
-    this.getRoot.bind(this);
-  }
-
-  getRoot() {
-    return this.root;
-  }
-
-
-  /**
-   * androidpublisher.edits.tracks.get
-   * @desc Fetches the track configuration for the specified track type.
-   * Includes the APK version codes that are in this track.
-   * @alias androidpublisher.edits.tracks.get
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.editId Unique identifier for this edit.
-   * @param {string} params.packageName Unique identifier for the Android app that is being updated; for example, "com.spiffygame".
-   * @param {string} params.track The track to read or modify. Acceptable values are: "alpha", "beta", "production", "rollout" or "internal".
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Track>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Track>,
-      callback?: BodyResponseCallback<Schema$Track>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Track>,
-      callback?: BodyResponseCallback<Schema$Track>):
-      void|AxiosPromise<Schema$Track> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/edits/{editId}/tracks/{track}')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'GET'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'editId', 'track'],
-      pathParams: ['editId', 'packageName', 'track'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$Track>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$Track>(parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.edits.tracks.list
-   * @desc Lists all the track configurations for this edit.
-   * @alias androidpublisher.edits.tracks.list
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.editId Unique identifier for this edit.
-   * @param {string} params.packageName Unique identifier for the Android app that is being updated; for example, "com.spiffygame".
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  list(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$TracksListResponse>;
-  list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TracksListResponse>,
-      callback?: BodyResponseCallback<Schema$TracksListResponse>): void;
-  list(
-      params: any,
-      options?: MethodOptions|BodyResponseCallback<Schema$TracksListResponse>,
-      callback?: BodyResponseCallback<Schema$TracksListResponse>):
-      void|AxiosPromise<Schema$TracksListResponse> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/edits/{editId}/tracks')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'GET'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'editId'],
-      pathParams: ['editId', 'packageName'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$TracksListResponse>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$TracksListResponse>(parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.edits.tracks.patch
-   * @desc Updates the track configuration for the specified track type. When
-   * halted, the rollout track cannot be updated without adding new APKs, and
-   * adding new APKs will cause it to resume. This method supports patch
-   * semantics.
-   * @alias androidpublisher.edits.tracks.patch
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.editId Unique identifier for this edit.
-   * @param {string} params.packageName Unique identifier for the Android app that is being updated; for example, "com.spiffygame".
-   * @param {string} params.track The track to read or modify. Acceptable values are: "alpha", "beta", "production", "rollout" or "internal".
-   * @param {().Track} params.resource Request body data
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Track>;
-  patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Track>,
-      callback?: BodyResponseCallback<Schema$Track>): void;
-  patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Track>,
-      callback?: BodyResponseCallback<Schema$Track>):
-      void|AxiosPromise<Schema$Track> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/edits/{editId}/tracks/{track}')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'PATCH'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'editId', 'track'],
-      pathParams: ['editId', 'packageName', 'track'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$Track>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$Track>(parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.edits.tracks.update
-   * @desc Updates the track configuration for the specified track type. When
-   * halted, the rollout track cannot be updated without adding new APKs, and
-   * adding new APKs will cause it to resume.
-   * @alias androidpublisher.edits.tracks.update
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.editId Unique identifier for this edit.
-   * @param {string} params.packageName Unique identifier for the Android app that is being updated; for example, "com.spiffygame".
-   * @param {string} params.track The track to read or modify. Acceptable values are: "alpha", "beta", "production", "rollout" or "internal".
-   * @param {().Track} params.resource Request body data
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Track>;
-  update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Track>,
-      callback?: BodyResponseCallback<Schema$Track>): void;
-  update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Track>,
-      callback?: BodyResponseCallback<Schema$Track>):
-      void|AxiosPromise<Schema$Track> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/edits/{editId}/tracks/{track}')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'PUT'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'editId', 'track'],
-      pathParams: ['editId', 'packageName', 'track'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$Track>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$Track>(parameters);
-    }
-  }
-}
-
-
-export class Resource$Inappproducts {
-  root: Androidpublisher;
-  constructor(root: Androidpublisher) {
-    this.root = root;
-    this.getRoot.bind(this);
-  }
-
-  getRoot() {
-    return this.root;
-  }
-
-
-  /**
-   * androidpublisher.inappproducts.delete
-   * @desc Delete an in-app product for an app.
-   * @alias androidpublisher.inappproducts.delete
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.packageName Unique identifier for the Android app with the in-app product; for example, "com.spiffygame".
-   * @param {string} params.sku Unique identifier for the in-app product.
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
-  delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
-      callback?: BodyResponseCallback<void>): void;
-  delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
-      callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/inappproducts/{sku}')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'DELETE'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'sku'],
-      pathParams: ['packageName', 'sku'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<void>(parameters, callback);
-    } else {
-      return createAPIRequest<void>(parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.inappproducts.get
-   * @desc Returns information about the in-app product specified.
-   * @alias androidpublisher.inappproducts.get
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.packageName
-   * @param {string} params.sku Unique identifier for the in-app product.
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$InAppProduct>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InAppProduct>,
-      callback?: BodyResponseCallback<Schema$InAppProduct>): void;
-  get(params: any,
-      options?: MethodOptions|BodyResponseCallback<Schema$InAppProduct>,
-      callback?: BodyResponseCallback<Schema$InAppProduct>):
-      void|AxiosPromise<Schema$InAppProduct> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/inappproducts/{sku}')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'GET'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'sku'],
-      pathParams: ['packageName', 'sku'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$InAppProduct>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$InAppProduct>(parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.inappproducts.insert
-   * @desc Creates a new in-app product for an app.
-   * @alias androidpublisher.inappproducts.insert
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {boolean=} params.autoConvertMissingPrices If true the prices for all regions targeted by the parent app that don't have a price specified for this in-app product will be auto converted to the target currency based on the default price. Defaults to false.
-   * @param {string} params.packageName Unique identifier for the Android app; for example, "com.spiffygame".
-   * @param {().InAppProduct} params.resource Request body data
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  insert(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$InAppProduct>;
-  insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InAppProduct>,
-      callback?: BodyResponseCallback<Schema$InAppProduct>): void;
-  insert(
-      params: any,
-      options?: MethodOptions|BodyResponseCallback<Schema$InAppProduct>,
-      callback?: BodyResponseCallback<Schema$InAppProduct>):
-      void|AxiosPromise<Schema$InAppProduct> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/inappproducts')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'POST'
-          },
-          options),
-      params,
-      requiredParams: ['packageName'],
-      pathParams: ['packageName'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$InAppProduct>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$InAppProduct>(parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.inappproducts.list
-   * @desc List all the in-app products for an Android app, both subscriptions
-   * and managed in-app products..
-   * @alias androidpublisher.inappproducts.list
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {integer=} params.maxResults
-   * @param {string} params.packageName Unique identifier for the Android app with in-app products; for example, "com.spiffygame".
-   * @param {integer=} params.startIndex
-   * @param {string=} params.token
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  list(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$InappproductsListResponse>;
-  list(
-      params: any,
-      options: MethodOptions|
-      BodyResponseCallback<Schema$InappproductsListResponse>,
-      callback?: BodyResponseCallback<Schema$InappproductsListResponse>): void;
-  list(
-      params: any,
-      options?: MethodOptions|
-      BodyResponseCallback<Schema$InappproductsListResponse>,
-      callback?: BodyResponseCallback<Schema$InappproductsListResponse>):
-      void|AxiosPromise<Schema$InappproductsListResponse> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/inappproducts')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'GET'
-          },
-          options),
-      params,
-      requiredParams: ['packageName'],
-      pathParams: ['packageName'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$InappproductsListResponse>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$InappproductsListResponse>(parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.inappproducts.patch
-   * @desc Updates the details of an in-app product. This method supports patch
-   * semantics.
-   * @alias androidpublisher.inappproducts.patch
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {boolean=} params.autoConvertMissingPrices If true the prices for all regions targeted by the parent app that don't have a price specified for this in-app product will be auto converted to the target currency based on the default price. Defaults to false.
-   * @param {string} params.packageName Unique identifier for the Android app with the in-app product; for example, "com.spiffygame".
-   * @param {string} params.sku Unique identifier for the in-app product.
-   * @param {().InAppProduct} params.resource Request body data
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  patch(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$InAppProduct>;
-  patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InAppProduct>,
-      callback?: BodyResponseCallback<Schema$InAppProduct>): void;
-  patch(
-      params: any,
-      options?: MethodOptions|BodyResponseCallback<Schema$InAppProduct>,
-      callback?: BodyResponseCallback<Schema$InAppProduct>):
-      void|AxiosPromise<Schema$InAppProduct> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/inappproducts/{sku}')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'PATCH'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'sku'],
-      pathParams: ['packageName', 'sku'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$InAppProduct>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$InAppProduct>(parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.inappproducts.update
-   * @desc Updates the details of an in-app product.
-   * @alias androidpublisher.inappproducts.update
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {boolean=} params.autoConvertMissingPrices If true the prices for all regions targeted by the parent app that don't have a price specified for this in-app product will be auto converted to the target currency based on the default price. Defaults to false.
-   * @param {string} params.packageName Unique identifier for the Android app with the in-app product; for example, "com.spiffygame".
-   * @param {string} params.sku Unique identifier for the in-app product.
-   * @param {().InAppProduct} params.resource Request body data
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  update(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$InAppProduct>;
-  update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InAppProduct>,
-      callback?: BodyResponseCallback<Schema$InAppProduct>): void;
-  update(
-      params: any,
-      options?: MethodOptions|BodyResponseCallback<Schema$InAppProduct>,
-      callback?: BodyResponseCallback<Schema$InAppProduct>):
-      void|AxiosPromise<Schema$InAppProduct> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/inappproducts/{sku}')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'PUT'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'sku'],
-      pathParams: ['packageName', 'sku'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$InAppProduct>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$InAppProduct>(parameters);
-    }
-  }
-}
-
-export class Resource$Purchases {
-  root: Androidpublisher;
-  products: Resource$Purchases$Products;
-  subscriptions: Resource$Purchases$Subscriptions;
-  voidedpurchases: Resource$Purchases$Voidedpurchases;
-  constructor(root: Androidpublisher) {
-    this.root = root;
-    this.getRoot.bind(this);
-    this.products = new Resource$Purchases$Products(root);
-    this.subscriptions = new Resource$Purchases$Subscriptions(root);
-    this.voidedpurchases = new Resource$Purchases$Voidedpurchases(root);
-  }
-
-  getRoot() {
-    return this.root;
-  }
-}
-export class Resource$Purchases$Products {
-  root: Androidpublisher;
-  constructor(root: Androidpublisher) {
-    this.root = root;
-    this.getRoot.bind(this);
-  }
-
-  getRoot() {
-    return this.root;
-  }
-
-
-  /**
-   * androidpublisher.purchases.products.get
-   * @desc Checks the purchase and consumption status of an inapp item.
-   * @alias androidpublisher.purchases.products.get
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.packageName The package name of the application the inapp product was sold in (for example, 'com.some.thing').
-   * @param {string} params.productId The inapp product SKU (for example, 'com.some.thing.inapp1').
-   * @param {string} params.token The token provided to the user's device when the inapp product was purchased.
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  get(params: any,
-      options?: MethodOptions): AxiosPromise<Schema$ProductPurchase>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ProductPurchase>,
-      callback?: BodyResponseCallback<Schema$ProductPurchase>): void;
-  get(params: any,
-      options?: MethodOptions|BodyResponseCallback<Schema$ProductPurchase>,
-      callback?: BodyResponseCallback<Schema$ProductPurchase>):
-      void|AxiosPromise<Schema$ProductPurchase> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/purchases/products/{productId}/tokens/{token}')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'GET'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'productId', 'token'],
-      pathParams: ['packageName', 'productId', 'token'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$ProductPurchase>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$ProductPurchase>(parameters);
-    }
-  }
-}
-
-export class Resource$Purchases$Subscriptions {
-  root: Androidpublisher;
-  constructor(root: Androidpublisher) {
-    this.root = root;
-    this.getRoot.bind(this);
-  }
-
-  getRoot() {
-    return this.root;
-  }
-
-
-  /**
-   * androidpublisher.purchases.subscriptions.cancel
-   * @desc Cancels a user's subscription purchase. The subscription remains
-   * valid until its expiration time.
-   * @alias androidpublisher.purchases.subscriptions.cancel
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.packageName The package name of the application for which this subscription was purchased (for example, 'com.some.thing').
-   * @param {string} params.subscriptionId The purchased subscription ID (for example, 'monthly001').
-   * @param {string} params.token The token provided to the user's device when the subscription was purchased.
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  cancel(params: any, options?: MethodOptions): AxiosPromise<void>;
-  cancel(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
-      callback?: BodyResponseCallback<void>): void;
-  cancel(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
-      callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/purchases/subscriptions/{subscriptionId}/tokens/{token}:cancel')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'POST'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'subscriptionId', 'token'],
-      pathParams: ['packageName', 'subscriptionId', 'token'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<void>(parameters, callback);
-    } else {
-      return createAPIRequest<void>(parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.purchases.subscriptions.defer
-   * @desc Defers a user's subscription purchase until a specified future
-   * expiration time.
-   * @alias androidpublisher.purchases.subscriptions.defer
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.packageName The package name of the application for which this subscription was purchased (for example, 'com.some.thing').
-   * @param {string} params.subscriptionId The purchased subscription ID (for example, 'monthly001').
-   * @param {string} params.token The token provided to the user's device when the subscription was purchased.
-   * @param {().SubscriptionPurchasesDeferRequest} params.resource Request body data
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  defer(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$SubscriptionPurchasesDeferResponse>;
-  defer(
-      params: any,
-      options: MethodOptions|
-      BodyResponseCallback<Schema$SubscriptionPurchasesDeferResponse>,
-      callback?:
-          BodyResponseCallback<Schema$SubscriptionPurchasesDeferResponse>):
-      void;
-  defer(
-      params: any,
-      options?: MethodOptions|
-      BodyResponseCallback<Schema$SubscriptionPurchasesDeferResponse>,
-      callback?:
-          BodyResponseCallback<Schema$SubscriptionPurchasesDeferResponse>):
-      void|AxiosPromise<Schema$SubscriptionPurchasesDeferResponse> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/purchases/subscriptions/{subscriptionId}/tokens/{token}:defer')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'POST'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'subscriptionId', 'token'],
-      pathParams: ['packageName', 'subscriptionId', 'token'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$SubscriptionPurchasesDeferResponse>(
-          parameters, callback);
-    } else {
-      return createAPIRequest<Schema$SubscriptionPurchasesDeferResponse>(
-          parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.purchases.subscriptions.get
-   * @desc Checks whether a user's subscription purchase is valid and returns
-   * its expiry time.
-   * @alias androidpublisher.purchases.subscriptions.get
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.packageName The package name of the application for which this subscription was purchased (for example, 'com.some.thing').
-   * @param {string} params.subscriptionId The purchased subscription ID (for example, 'monthly001').
-   * @param {string} params.token The token provided to the user's device when the subscription was purchased.
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  get(params: any,
-      options?: MethodOptions): AxiosPromise<Schema$SubscriptionPurchase>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SubscriptionPurchase>,
-      callback?: BodyResponseCallback<Schema$SubscriptionPurchase>): void;
-  get(params: any,
-      options?: MethodOptions|BodyResponseCallback<Schema$SubscriptionPurchase>,
-      callback?: BodyResponseCallback<Schema$SubscriptionPurchase>):
-      void|AxiosPromise<Schema$SubscriptionPurchase> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/purchases/subscriptions/{subscriptionId}/tokens/{token}')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'GET'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'subscriptionId', 'token'],
-      pathParams: ['packageName', 'subscriptionId', 'token'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$SubscriptionPurchase>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$SubscriptionPurchase>(parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.purchases.subscriptions.refund
-   * @desc Refunds a user's subscription purchase, but the subscription remains
-   * valid until its expiration time and it will continue to recur.
-   * @alias androidpublisher.purchases.subscriptions.refund
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.packageName The package name of the application for which this subscription was purchased (for example, 'com.some.thing').
-   * @param {string} params.subscriptionId The purchased subscription ID (for example, 'monthly001').
-   * @param {string} params.token The token provided to the user's device when the subscription was purchased.
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  refund(params: any, options?: MethodOptions): AxiosPromise<void>;
-  refund(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
-      callback?: BodyResponseCallback<void>): void;
-  refund(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
-      callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/purchases/subscriptions/{subscriptionId}/tokens/{token}:refund')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'POST'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'subscriptionId', 'token'],
-      pathParams: ['packageName', 'subscriptionId', 'token'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<void>(parameters, callback);
-    } else {
-      return createAPIRequest<void>(parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.purchases.subscriptions.revoke
-   * @desc Refunds and immediately revokes a user's subscription purchase.
-   * Access to the subscription will be terminated immediately and it will stop
-   * recurring.
-   * @alias androidpublisher.purchases.subscriptions.revoke
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.packageName The package name of the application for which this subscription was purchased (for example, 'com.some.thing').
-   * @param {string} params.subscriptionId The purchased subscription ID (for example, 'monthly001').
-   * @param {string} params.token The token provided to the user's device when the subscription was purchased.
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  revoke(params: any, options?: MethodOptions): AxiosPromise<void>;
-  revoke(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
-      callback?: BodyResponseCallback<void>): void;
-  revoke(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
-      callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/purchases/subscriptions/{subscriptionId}/tokens/{token}:revoke')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'POST'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'subscriptionId', 'token'],
-      pathParams: ['packageName', 'subscriptionId', 'token'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<void>(parameters, callback);
-    } else {
-      return createAPIRequest<void>(parameters);
-    }
-  }
-}
-
-export class Resource$Purchases$Voidedpurchases {
-  root: Androidpublisher;
-  constructor(root: Androidpublisher) {
-    this.root = root;
-    this.getRoot.bind(this);
-  }
-
-  getRoot() {
-    return this.root;
-  }
-
-
-  /**
-   * androidpublisher.purchases.voidedpurchases.list
-   * @desc Lists the purchases that were canceled, refunded or charged-back.
-   * @alias androidpublisher.purchases.voidedpurchases.list
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string=} params.endTime The time, in milliseconds since the Epoch, of the newest voided in-app product purchase that you want to see in the response. The value of this parameter cannot be greater than the current time and is ignored if a pagination token is set. Default value is current time. Note: This filter is applied on the time at which the record is seen as voided by our systems and not the actual voided time returned in the response.
-   * @param {integer=} params.maxResults
-   * @param {string} params.packageName The package name of the application for which voided purchases need to be returned (for example, 'com.some.thing').
-   * @param {integer=} params.startIndex
-   * @param {string=} params.startTime The time, in milliseconds since the Epoch, of the oldest voided in-app product purchase that you want to see in the response. The value of this parameter cannot be older than 30 days and is ignored if a pagination token is set. Default value is current time minus 30 days. Note: This filter is applied on the time at which the record is seen as voided by our systems and not the actual voided time returned in the response.
-   * @param {string=} params.token
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  list(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$VoidedPurchasesListResponse>;
-  list(
-      params: any,
-      options: MethodOptions|
-      BodyResponseCallback<Schema$VoidedPurchasesListResponse>,
-      callback?: BodyResponseCallback<Schema$VoidedPurchasesListResponse>):
-      void;
-  list(
-      params: any,
-      options?: MethodOptions|
-      BodyResponseCallback<Schema$VoidedPurchasesListResponse>,
-      callback?: BodyResponseCallback<Schema$VoidedPurchasesListResponse>):
-      void|AxiosPromise<Schema$VoidedPurchasesListResponse> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/purchases/voidedpurchases')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'GET'
-          },
-          options),
-      params,
-      requiredParams: ['packageName'],
-      pathParams: ['packageName'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$VoidedPurchasesListResponse>(
-          parameters, callback);
-    } else {
-      return createAPIRequest<Schema$VoidedPurchasesListResponse>(parameters);
-    }
-  }
-}
-
-
-export class Resource$Reviews {
-  root: Androidpublisher;
-  constructor(root: Androidpublisher) {
-    this.root = root;
-    this.getRoot.bind(this);
-  }
-
-  getRoot() {
-    return this.root;
-  }
-
-
-  /**
-   * androidpublisher.reviews.get
-   * @desc Returns a single review.
-   * @alias androidpublisher.reviews.get
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.packageName Unique identifier for the Android app for which we want reviews; for example, "com.spiffygame".
-   * @param {string} params.reviewId
-   * @param {string=} params.translationLanguage
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Review>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Review>,
-      callback?: BodyResponseCallback<Schema$Review>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Review>,
-      callback?: BodyResponseCallback<Schema$Review>):
-      void|AxiosPromise<Schema$Review> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/reviews/{reviewId}')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'GET'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'reviewId'],
-      pathParams: ['packageName', 'reviewId'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$Review>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$Review>(parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.reviews.list
-   * @desc Returns a list of reviews. Only reviews from last week will be
-   * returned.
-   * @alias androidpublisher.reviews.list
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {integer=} params.maxResults
-   * @param {string} params.packageName Unique identifier for the Android app for which we want reviews; for example, "com.spiffygame".
-   * @param {integer=} params.startIndex
-   * @param {string=} params.token
-   * @param {string=} params.translationLanguage
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  list(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$ReviewsListResponse>;
-  list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ReviewsListResponse>,
-      callback?: BodyResponseCallback<Schema$ReviewsListResponse>): void;
-  list(
-      params: any,
-      options?: MethodOptions|BodyResponseCallback<Schema$ReviewsListResponse>,
-      callback?: BodyResponseCallback<Schema$ReviewsListResponse>):
-      void|AxiosPromise<Schema$ReviewsListResponse> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url: (rootUrl +
-                  '/androidpublisher/v2/applications/{packageName}/reviews')
-                     .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'GET'
-          },
-          options),
-      params,
-      requiredParams: ['packageName'],
-      pathParams: ['packageName'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$ReviewsListResponse>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$ReviewsListResponse>(parameters);
-    }
-  }
-
-
-  /**
-   * androidpublisher.reviews.reply
-   * @desc Reply to a single review, or update an existing reply.
-   * @alias androidpublisher.reviews.reply
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.packageName Unique identifier for the Android app for which we want reviews; for example, "com.spiffygame".
-   * @param {string} params.reviewId
-   * @param {().ReviewsReplyRequest} params.resource Request body data
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  reply(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$ReviewsReplyResponse>;
-  reply(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ReviewsReplyResponse>,
-      callback?: BodyResponseCallback<Schema$ReviewsReplyResponse>): void;
-  reply(
-      params: any,
-      options?: MethodOptions|BodyResponseCallback<Schema$ReviewsReplyResponse>,
-      callback?: BodyResponseCallback<Schema$ReviewsReplyResponse>):
-      void|AxiosPromise<Schema$ReviewsReplyResponse> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://www.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url:
-                (rootUrl +
-                 '/androidpublisher/v2/applications/{packageName}/reviews/{reviewId}:reply')
-                    .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'POST'
-          },
-          options),
-      params,
-      requiredParams: ['packageName', 'reviewId'],
-      pathParams: ['packageName', 'reviewId'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$ReviewsReplyResponse>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$ReviewsReplyResponse>(parameters);
-    }
-  }
-}
diff --git a/src/apis/appengine/v1.ts b/src/apis/appengine/v1.ts
index dd97025400..17b80dc1a1 100644
--- a/src/apis/appengine/v1.ts
+++ b/src/apis/appengine/v1.ts
@@ -1904,13 +1904,13 @@ export class Resource$Apps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1956,11 +1956,11 @@ export class Resource$Apps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Application>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Application>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Application>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Application>,
       callback?: BodyResponseCallback<Schema$Application>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Application>,
       callback?: BodyResponseCallback<Schema$Application>):
       void|AxiosPromise<Schema$Application> {
@@ -2011,13 +2011,13 @@ export class Resource$Apps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2068,13 +2068,13 @@ export class Resource$Apps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  repair(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  repair(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   repair(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   repair(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2133,14 +2133,15 @@ export class Resource$Apps$Authorizedcertificates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AuthorizedCertificate>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AuthorizedCertificate>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$AuthorizedCertificate>,
       callback?: BodyResponseCallback<Schema$AuthorizedCertificate>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AuthorizedCertificate>,
       callback?: BodyResponseCallback<Schema$AuthorizedCertificate>):
@@ -2189,12 +2190,12 @@ export class Resource$Apps$Authorizedcertificates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2244,12 +2245,13 @@ export class Resource$Apps$Authorizedcertificates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$AuthorizedCertificate>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AuthorizedCertificate>,
+  get(params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$AuthorizedCertificate>,
       callback?: BodyResponseCallback<Schema$AuthorizedCertificate>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AuthorizedCertificate>,
       callback?: BodyResponseCallback<Schema$AuthorizedCertificate>):
@@ -2302,17 +2304,17 @@ export class Resource$Apps$Authorizedcertificates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListAuthorizedCertificatesResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListAuthorizedCertificatesResponse>,
       callback?:
           BodyResponseCallback<Schema$ListAuthorizedCertificatesResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListAuthorizedCertificatesResponse>,
       callback?:
@@ -2369,14 +2371,15 @@ export class Resource$Apps$Authorizedcertificates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AuthorizedCertificate>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AuthorizedCertificate>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$AuthorizedCertificate>,
       callback?: BodyResponseCallback<Schema$AuthorizedCertificate>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AuthorizedCertificate>,
       callback?: BodyResponseCallback<Schema$AuthorizedCertificate>):
@@ -2440,16 +2443,16 @@ export class Resource$Apps$Authorizeddomains {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListAuthorizedDomainsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListAuthorizedDomainsResponse>,
       callback?: BodyResponseCallback<Schema$ListAuthorizedDomainsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListAuthorizedDomainsResponse>,
       callback?: BodyResponseCallback<Schema$ListAuthorizedDomainsResponse>):
@@ -2514,13 +2517,13 @@ export class Resource$Apps$Domainmappings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2570,13 +2573,13 @@ export class Resource$Apps$Domainmappings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2625,11 +2628,12 @@ export class Resource$Apps$Domainmappings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$DomainMapping>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DomainMapping>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$DomainMapping>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DomainMapping>,
       callback?: BodyResponseCallback<Schema$DomainMapping>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DomainMapping>,
       callback?: BodyResponseCallback<Schema$DomainMapping>):
       void|AxiosPromise<Schema$DomainMapping> {
@@ -2679,15 +2683,15 @@ export class Resource$Apps$Domainmappings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListDomainMappingsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListDomainMappingsResponse>,
       callback?: BodyResponseCallback<Schema$ListDomainMappingsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListDomainMappingsResponse>,
       callback?: BodyResponseCallback<Schema$ListDomainMappingsResponse>):
@@ -2741,13 +2745,13 @@ export class Resource$Apps$Domainmappings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2824,16 +2828,16 @@ export class Resource$Apps$Firewall$Ingressrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchUpdate(params: any, options?: MethodOptions):
+  batchUpdate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BatchUpdateIngressRulesResponse>;
   batchUpdate(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$BatchUpdateIngressRulesResponse>,
       callback?: BodyResponseCallback<Schema$BatchUpdateIngressRulesResponse>):
       void;
   batchUpdate(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$BatchUpdateIngressRulesResponse>,
       callback?: BodyResponseCallback<Schema$BatchUpdateIngressRulesResponse>):
@@ -2885,14 +2889,14 @@ export class Resource$Apps$Firewall$Ingressrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FirewallRule>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$FirewallRule>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$FirewallRule>,
       callback?: BodyResponseCallback<Schema$FirewallRule>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$FirewallRule>,
       callback?: BodyResponseCallback<Schema$FirewallRule>):
       void|AxiosPromise<Schema$FirewallRule> {
@@ -2940,12 +2944,12 @@ export class Resource$Apps$Firewall$Ingressrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2993,11 +2997,11 @@ export class Resource$Apps$Firewall$Ingressrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$FirewallRule>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$FirewallRule>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$FirewallRule>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$FirewallRule>,
       callback?: BodyResponseCallback<Schema$FirewallRule>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$FirewallRule>,
       callback?: BodyResponseCallback<Schema$FirewallRule>):
       void|AxiosPromise<Schema$FirewallRule> {
@@ -3048,15 +3052,15 @@ export class Resource$Apps$Firewall$Ingressrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListIngressRulesResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListIngressRulesResponse>,
       callback?: BodyResponseCallback<Schema$ListIngressRulesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListIngressRulesResponse>,
       callback?: BodyResponseCallback<Schema$ListIngressRulesResponse>):
@@ -3107,14 +3111,14 @@ export class Resource$Apps$Firewall$Ingressrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FirewallRule>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$FirewallRule>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$FirewallRule>,
       callback?: BodyResponseCallback<Schema$FirewallRule>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$FirewallRule>,
       callback?: BodyResponseCallback<Schema$FirewallRule>):
       void|AxiosPromise<Schema$FirewallRule> {
@@ -3176,10 +3180,11 @@ export class Resource$Apps$Locations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Location>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Location>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Location>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Location>,
       callback?: BodyResponseCallback<Schema$Location>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Location>,
       callback?: BodyResponseCallback<Schema$Location>):
       void|AxiosPromise<Schema$Location> {
@@ -3229,14 +3234,15 @@ export class Resource$Apps$Locations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListLocationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListLocationsResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ListLocationsResponse>,
       callback?: BodyResponseCallback<Schema$ListLocationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListLocationsResponse>,
       callback?: BodyResponseCallback<Schema$ListLocationsResponse>):
@@ -3299,11 +3305,11 @@ export class Resource$Apps$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3361,15 +3367,15 @@ export class Resource$Apps$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListOperationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>):
@@ -3432,13 +3438,13 @@ export class Resource$Apps$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3486,10 +3492,12 @@ export class Resource$Apps$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Service>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Service>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Service>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Service>,
       callback?: BodyResponseCallback<Schema$Service>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Service>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Service>,
       callback?: BodyResponseCallback<Schema$Service>):
       void|AxiosPromise<Schema$Service> {
     if (typeof options === 'function') {
@@ -3537,14 +3545,14 @@ export class Resource$Apps$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListServicesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListServicesResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListServicesResponse>,
       callback?: BodyResponseCallback<Schema$ListServicesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListServicesResponse>,
       callback?: BodyResponseCallback<Schema$ListServicesResponse>):
       void|AxiosPromise<Schema$ListServicesResponse> {
@@ -3595,13 +3603,13 @@ export class Resource$Apps$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3663,13 +3671,13 @@ export class Resource$Apps$Services$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3718,13 +3726,13 @@ export class Resource$Apps$Services$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3777,10 +3785,12 @@ export class Resource$Apps$Services$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Version>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Version>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Version>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Version>,
       callback?: BodyResponseCallback<Schema$Version>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Version>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Version>,
       callback?: BodyResponseCallback<Schema$Version>):
       void|AxiosPromise<Schema$Version> {
     if (typeof options === 'function') {
@@ -3832,14 +3842,14 @@ export class Resource$Apps$Services$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListVersionsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListVersionsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListVersionsResponse>,
       callback?: BodyResponseCallback<Schema$ListVersionsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListVersionsResponse>,
       callback?: BodyResponseCallback<Schema$ListVersionsResponse>):
       void|AxiosPromise<Schema$ListVersionsResponse> {
@@ -3916,13 +3926,13 @@ export class Resource$Apps$Services$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3991,13 +4001,13 @@ export class Resource$Apps$Services$Versions$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  debug(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  debug(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   debug(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   debug(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -4049,13 +4059,13 @@ export class Resource$Apps$Services$Versions$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -4107,10 +4117,11 @@ export class Resource$Apps$Services$Versions$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Instance>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Instance>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Instance>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Instance>,
       callback?: BodyResponseCallback<Schema$Instance>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Instance>,
       callback?: BodyResponseCallback<Schema$Instance>):
       void|AxiosPromise<Schema$Instance> {
@@ -4165,14 +4176,15 @@ export class Resource$Apps$Services$Versions$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListInstancesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListInstancesResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ListInstancesResponse>,
       callback?: BodyResponseCallback<Schema$ListInstancesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListInstancesResponse>,
       callback?: BodyResponseCallback<Schema$ListInstancesResponse>):
diff --git a/src/apis/appengine/v1alpha.ts b/src/apis/appengine/v1alpha.ts
index 31cf85c58d..385283a359 100644
--- a/src/apis/appengine/v1alpha.ts
+++ b/src/apis/appengine/v1alpha.ts
@@ -704,14 +704,15 @@ export class Resource$Apps$Authorizedcertificates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AuthorizedCertificate>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AuthorizedCertificate>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$AuthorizedCertificate>,
       callback?: BodyResponseCallback<Schema$AuthorizedCertificate>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AuthorizedCertificate>,
       callback?: BodyResponseCallback<Schema$AuthorizedCertificate>):
@@ -760,12 +761,12 @@ export class Resource$Apps$Authorizedcertificates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -815,12 +816,13 @@ export class Resource$Apps$Authorizedcertificates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$AuthorizedCertificate>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AuthorizedCertificate>,
+  get(params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$AuthorizedCertificate>,
       callback?: BodyResponseCallback<Schema$AuthorizedCertificate>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AuthorizedCertificate>,
       callback?: BodyResponseCallback<Schema$AuthorizedCertificate>):
@@ -873,17 +875,17 @@ export class Resource$Apps$Authorizedcertificates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListAuthorizedCertificatesResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListAuthorizedCertificatesResponse>,
       callback?:
           BodyResponseCallback<Schema$ListAuthorizedCertificatesResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListAuthorizedCertificatesResponse>,
       callback?:
@@ -940,14 +942,15 @@ export class Resource$Apps$Authorizedcertificates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AuthorizedCertificate>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AuthorizedCertificate>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$AuthorizedCertificate>,
       callback?: BodyResponseCallback<Schema$AuthorizedCertificate>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AuthorizedCertificate>,
       callback?: BodyResponseCallback<Schema$AuthorizedCertificate>):
@@ -1011,16 +1014,16 @@ export class Resource$Apps$Authorizeddomains {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListAuthorizedDomainsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListAuthorizedDomainsResponse>,
       callback?: BodyResponseCallback<Schema$ListAuthorizedDomainsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListAuthorizedDomainsResponse>,
       callback?: BodyResponseCallback<Schema$ListAuthorizedDomainsResponse>):
@@ -1086,13 +1089,13 @@ export class Resource$Apps$Domainmappings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1142,13 +1145,13 @@ export class Resource$Apps$Domainmappings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1197,11 +1200,12 @@ export class Resource$Apps$Domainmappings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$DomainMapping>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DomainMapping>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$DomainMapping>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DomainMapping>,
       callback?: BodyResponseCallback<Schema$DomainMapping>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DomainMapping>,
       callback?: BodyResponseCallback<Schema$DomainMapping>):
       void|AxiosPromise<Schema$DomainMapping> {
@@ -1251,15 +1255,15 @@ export class Resource$Apps$Domainmappings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListDomainMappingsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListDomainMappingsResponse>,
       callback?: BodyResponseCallback<Schema$ListDomainMappingsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListDomainMappingsResponse>,
       callback?: BodyResponseCallback<Schema$ListDomainMappingsResponse>):
@@ -1314,13 +1318,13 @@ export class Resource$Apps$Domainmappings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1381,10 +1385,11 @@ export class Resource$Apps$Locations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Location>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Location>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Location>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Location>,
       callback?: BodyResponseCallback<Schema$Location>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Location>,
       callback?: BodyResponseCallback<Schema$Location>):
       void|AxiosPromise<Schema$Location> {
@@ -1434,14 +1439,15 @@ export class Resource$Apps$Locations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListLocationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListLocationsResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ListLocationsResponse>,
       callback?: BodyResponseCallback<Schema$ListLocationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListLocationsResponse>,
       callback?: BodyResponseCallback<Schema$ListLocationsResponse>):
@@ -1504,11 +1510,11 @@ export class Resource$Apps$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1566,15 +1572,15 @@ export class Resource$Apps$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListOperationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>):
diff --git a/src/apis/appengine/v1beta.ts b/src/apis/appengine/v1beta.ts
index 12203acc39..55a660f487 100644
--- a/src/apis/appengine/v1beta.ts
+++ b/src/apis/appengine/v1beta.ts
@@ -2016,13 +2016,13 @@ export class Resource$Apps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2068,11 +2068,11 @@ export class Resource$Apps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Application>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Application>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Application>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Application>,
       callback?: BodyResponseCallback<Schema$Application>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Application>,
       callback?: BodyResponseCallback<Schema$Application>):
       void|AxiosPromise<Schema$Application> {
@@ -2124,13 +2124,13 @@ export class Resource$Apps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2182,13 +2182,13 @@ export class Resource$Apps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  repair(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  repair(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   repair(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   repair(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2247,14 +2247,15 @@ export class Resource$Apps$Authorizedcertificates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AuthorizedCertificate>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AuthorizedCertificate>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$AuthorizedCertificate>,
       callback?: BodyResponseCallback<Schema$AuthorizedCertificate>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AuthorizedCertificate>,
       callback?: BodyResponseCallback<Schema$AuthorizedCertificate>):
@@ -2303,12 +2304,12 @@ export class Resource$Apps$Authorizedcertificates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2358,12 +2359,13 @@ export class Resource$Apps$Authorizedcertificates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$AuthorizedCertificate>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AuthorizedCertificate>,
+  get(params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$AuthorizedCertificate>,
       callback?: BodyResponseCallback<Schema$AuthorizedCertificate>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AuthorizedCertificate>,
       callback?: BodyResponseCallback<Schema$AuthorizedCertificate>):
@@ -2416,17 +2418,17 @@ export class Resource$Apps$Authorizedcertificates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListAuthorizedCertificatesResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListAuthorizedCertificatesResponse>,
       callback?:
           BodyResponseCallback<Schema$ListAuthorizedCertificatesResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListAuthorizedCertificatesResponse>,
       callback?:
@@ -2483,14 +2485,15 @@ export class Resource$Apps$Authorizedcertificates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AuthorizedCertificate>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AuthorizedCertificate>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$AuthorizedCertificate>,
       callback?: BodyResponseCallback<Schema$AuthorizedCertificate>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AuthorizedCertificate>,
       callback?: BodyResponseCallback<Schema$AuthorizedCertificate>):
@@ -2554,16 +2557,16 @@ export class Resource$Apps$Authorizeddomains {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListAuthorizedDomainsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListAuthorizedDomainsResponse>,
       callback?: BodyResponseCallback<Schema$ListAuthorizedDomainsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListAuthorizedDomainsResponse>,
       callback?: BodyResponseCallback<Schema$ListAuthorizedDomainsResponse>):
@@ -2628,13 +2631,13 @@ export class Resource$Apps$Domainmappings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2684,13 +2687,13 @@ export class Resource$Apps$Domainmappings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2739,11 +2742,12 @@ export class Resource$Apps$Domainmappings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$DomainMapping>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DomainMapping>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$DomainMapping>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DomainMapping>,
       callback?: BodyResponseCallback<Schema$DomainMapping>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DomainMapping>,
       callback?: BodyResponseCallback<Schema$DomainMapping>):
       void|AxiosPromise<Schema$DomainMapping> {
@@ -2793,15 +2797,15 @@ export class Resource$Apps$Domainmappings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListDomainMappingsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListDomainMappingsResponse>,
       callback?: BodyResponseCallback<Schema$ListDomainMappingsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListDomainMappingsResponse>,
       callback?: BodyResponseCallback<Schema$ListDomainMappingsResponse>):
@@ -2855,13 +2859,13 @@ export class Resource$Apps$Domainmappings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2938,16 +2942,16 @@ export class Resource$Apps$Firewall$Ingressrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchUpdate(params: any, options?: MethodOptions):
+  batchUpdate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BatchUpdateIngressRulesResponse>;
   batchUpdate(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$BatchUpdateIngressRulesResponse>,
       callback?: BodyResponseCallback<Schema$BatchUpdateIngressRulesResponse>):
       void;
   batchUpdate(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$BatchUpdateIngressRulesResponse>,
       callback?: BodyResponseCallback<Schema$BatchUpdateIngressRulesResponse>):
@@ -2999,14 +3003,14 @@ export class Resource$Apps$Firewall$Ingressrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FirewallRule>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$FirewallRule>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$FirewallRule>,
       callback?: BodyResponseCallback<Schema$FirewallRule>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$FirewallRule>,
       callback?: BodyResponseCallback<Schema$FirewallRule>):
       void|AxiosPromise<Schema$FirewallRule> {
@@ -3054,12 +3058,12 @@ export class Resource$Apps$Firewall$Ingressrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -3108,11 +3112,11 @@ export class Resource$Apps$Firewall$Ingressrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$FirewallRule>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$FirewallRule>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$FirewallRule>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$FirewallRule>,
       callback?: BodyResponseCallback<Schema$FirewallRule>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$FirewallRule>,
       callback?: BodyResponseCallback<Schema$FirewallRule>):
       void|AxiosPromise<Schema$FirewallRule> {
@@ -3164,15 +3168,15 @@ export class Resource$Apps$Firewall$Ingressrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListIngressRulesResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListIngressRulesResponse>,
       callback?: BodyResponseCallback<Schema$ListIngressRulesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListIngressRulesResponse>,
       callback?: BodyResponseCallback<Schema$ListIngressRulesResponse>):
@@ -3223,14 +3227,14 @@ export class Resource$Apps$Firewall$Ingressrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FirewallRule>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$FirewallRule>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$FirewallRule>,
       callback?: BodyResponseCallback<Schema$FirewallRule>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$FirewallRule>,
       callback?: BodyResponseCallback<Schema$FirewallRule>):
       void|AxiosPromise<Schema$FirewallRule> {
@@ -3293,10 +3297,11 @@ export class Resource$Apps$Locations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Location>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Location>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Location>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Location>,
       callback?: BodyResponseCallback<Schema$Location>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Location>,
       callback?: BodyResponseCallback<Schema$Location>):
       void|AxiosPromise<Schema$Location> {
@@ -3346,14 +3351,15 @@ export class Resource$Apps$Locations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListLocationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListLocationsResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ListLocationsResponse>,
       callback?: BodyResponseCallback<Schema$ListLocationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListLocationsResponse>,
       callback?: BodyResponseCallback<Schema$ListLocationsResponse>):
@@ -3416,11 +3422,11 @@ export class Resource$Apps$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3478,15 +3484,15 @@ export class Resource$Apps$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListOperationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>):
@@ -3549,13 +3555,13 @@ export class Resource$Apps$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3603,10 +3609,12 @@ export class Resource$Apps$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Service>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Service>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Service>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Service>,
       callback?: BodyResponseCallback<Schema$Service>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Service>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Service>,
       callback?: BodyResponseCallback<Schema$Service>):
       void|AxiosPromise<Schema$Service> {
     if (typeof options === 'function') {
@@ -3654,14 +3662,14 @@ export class Resource$Apps$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListServicesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListServicesResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListServicesResponse>,
       callback?: BodyResponseCallback<Schema$ListServicesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListServicesResponse>,
       callback?: BodyResponseCallback<Schema$ListServicesResponse>):
       void|AxiosPromise<Schema$ListServicesResponse> {
@@ -3712,13 +3720,13 @@ export class Resource$Apps$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3780,13 +3788,13 @@ export class Resource$Apps$Services$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3836,13 +3844,13 @@ export class Resource$Apps$Services$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3895,10 +3903,12 @@ export class Resource$Apps$Services$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Version>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Version>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Version>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Version>,
       callback?: BodyResponseCallback<Schema$Version>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Version>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Version>,
       callback?: BodyResponseCallback<Schema$Version>):
       void|AxiosPromise<Schema$Version> {
     if (typeof options === 'function') {
@@ -3950,14 +3960,14 @@ export class Resource$Apps$Services$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListVersionsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListVersionsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListVersionsResponse>,
       callback?: BodyResponseCallback<Schema$ListVersionsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListVersionsResponse>,
       callback?: BodyResponseCallback<Schema$ListVersionsResponse>):
       void|AxiosPromise<Schema$ListVersionsResponse> {
@@ -4035,13 +4045,13 @@ export class Resource$Apps$Services$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -4110,13 +4120,13 @@ export class Resource$Apps$Services$Versions$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  debug(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  debug(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   debug(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   debug(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -4168,13 +4178,13 @@ export class Resource$Apps$Services$Versions$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -4226,10 +4236,11 @@ export class Resource$Apps$Services$Versions$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Instance>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Instance>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Instance>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Instance>,
       callback?: BodyResponseCallback<Schema$Instance>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Instance>,
       callback?: BodyResponseCallback<Schema$Instance>):
       void|AxiosPromise<Schema$Instance> {
@@ -4284,14 +4295,15 @@ export class Resource$Apps$Services$Versions$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListInstancesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListInstancesResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ListInstancesResponse>,
       callback?: BodyResponseCallback<Schema$ListInstancesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListInstancesResponse>,
       callback?: BodyResponseCallback<Schema$ListInstancesResponse>):
diff --git a/src/apis/appengine/v1beta4.ts b/src/apis/appengine/v1beta4.ts
index cd6836f615..73761d0786 100644
--- a/src/apis/appengine/v1beta4.ts
+++ b/src/apis/appengine/v1beta4.ts
@@ -1470,13 +1470,13 @@ export class Resource$Apps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1523,11 +1523,11 @@ export class Resource$Apps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Application>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Application>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Application>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Application>,
       callback?: BodyResponseCallback<Schema$Application>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Application>,
       callback?: BodyResponseCallback<Schema$Application>):
       void|AxiosPromise<Schema$Application> {
@@ -1580,13 +1580,13 @@ export class Resource$Apps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1645,10 +1645,11 @@ export class Resource$Apps$Locations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Location>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Location>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Location>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Location>,
       callback?: BodyResponseCallback<Schema$Location>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Location>,
       callback?: BodyResponseCallback<Schema$Location>):
       void|AxiosPromise<Schema$Location> {
@@ -1698,14 +1699,15 @@ export class Resource$Apps$Locations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListLocationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListLocationsResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ListLocationsResponse>,
       callback?: BodyResponseCallback<Schema$ListLocationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListLocationsResponse>,
       callback?: BodyResponseCallback<Schema$ListLocationsResponse>):
@@ -1768,13 +1770,13 @@ export class Resource$Apps$Modules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1822,10 +1824,10 @@ export class Resource$Apps$Modules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Module>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Module>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Module>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Module>,
       callback?: BodyResponseCallback<Schema$Module>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Module>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Module>,
       callback?: BodyResponseCallback<Schema$Module>):
       void|AxiosPromise<Schema$Module> {
     if (typeof options === 'function') {
@@ -1873,14 +1875,14 @@ export class Resource$Apps$Modules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListModulesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListModulesResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListModulesResponse>,
       callback?: BodyResponseCallback<Schema$ListModulesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListModulesResponse>,
       callback?: BodyResponseCallback<Schema$ListModulesResponse>):
       void|AxiosPromise<Schema$ListModulesResponse> {
@@ -1931,13 +1933,13 @@ export class Resource$Apps$Modules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1999,13 +2001,13 @@ export class Resource$Apps$Modules$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2055,13 +2057,13 @@ export class Resource$Apps$Modules$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2114,10 +2116,12 @@ export class Resource$Apps$Modules$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Version>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Version>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Version>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Version>,
       callback?: BodyResponseCallback<Schema$Version>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Version>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Version>,
       callback?: BodyResponseCallback<Schema$Version>):
       void|AxiosPromise<Schema$Version> {
     if (typeof options === 'function') {
@@ -2169,14 +2173,14 @@ export class Resource$Apps$Modules$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListVersionsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListVersionsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListVersionsResponse>,
       callback?: BodyResponseCallback<Schema$ListVersionsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListVersionsResponse>,
       callback?: BodyResponseCallback<Schema$ListVersionsResponse>):
       void|AxiosPromise<Schema$ListVersionsResponse> {
@@ -2242,13 +2246,13 @@ export class Resource$Apps$Modules$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2317,13 +2321,13 @@ export class Resource$Apps$Modules$Versions$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  debug(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  debug(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   debug(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   debug(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2375,13 +2379,13 @@ export class Resource$Apps$Modules$Versions$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2433,10 +2437,11 @@ export class Resource$Apps$Modules$Versions$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Instance>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Instance>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Instance>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Instance>,
       callback?: BodyResponseCallback<Schema$Instance>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Instance>,
       callback?: BodyResponseCallback<Schema$Instance>):
       void|AxiosPromise<Schema$Instance> {
@@ -2491,14 +2496,15 @@ export class Resource$Apps$Modules$Versions$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListInstancesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListInstancesResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ListInstancesResponse>,
       callback?: BodyResponseCallback<Schema$ListInstancesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListInstancesResponse>,
       callback?: BodyResponseCallback<Schema$ListInstancesResponse>):
@@ -2565,11 +2571,11 @@ export class Resource$Apps$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2627,15 +2633,15 @@ export class Resource$Apps$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListOperationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>):
diff --git a/src/apis/appengine/v1beta5.ts b/src/apis/appengine/v1beta5.ts
index 191060048e..eb77883e6b 100644
--- a/src/apis/appengine/v1beta5.ts
+++ b/src/apis/appengine/v1beta5.ts
@@ -1444,13 +1444,13 @@ export class Resource$Apps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1497,11 +1497,11 @@ export class Resource$Apps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Application>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Application>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Application>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Application>,
       callback?: BodyResponseCallback<Schema$Application>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Application>,
       callback?: BodyResponseCallback<Schema$Application>):
       void|AxiosPromise<Schema$Application> {
@@ -1554,13 +1554,13 @@ export class Resource$Apps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1619,10 +1619,11 @@ export class Resource$Apps$Locations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Location>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Location>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Location>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Location>,
       callback?: BodyResponseCallback<Schema$Location>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Location>,
       callback?: BodyResponseCallback<Schema$Location>):
       void|AxiosPromise<Schema$Location> {
@@ -1672,14 +1673,15 @@ export class Resource$Apps$Locations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListLocationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListLocationsResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ListLocationsResponse>,
       callback?: BodyResponseCallback<Schema$ListLocationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListLocationsResponse>,
       callback?: BodyResponseCallback<Schema$ListLocationsResponse>):
@@ -1742,11 +1744,11 @@ export class Resource$Apps$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1804,15 +1806,15 @@ export class Resource$Apps$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListOperationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>):
@@ -1875,13 +1877,13 @@ export class Resource$Apps$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1929,10 +1931,12 @@ export class Resource$Apps$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Service>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Service>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Service>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Service>,
       callback?: BodyResponseCallback<Schema$Service>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Service>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Service>,
       callback?: BodyResponseCallback<Schema$Service>):
       void|AxiosPromise<Schema$Service> {
     if (typeof options === 'function') {
@@ -1980,14 +1984,14 @@ export class Resource$Apps$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListServicesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListServicesResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListServicesResponse>,
       callback?: BodyResponseCallback<Schema$ListServicesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListServicesResponse>,
       callback?: BodyResponseCallback<Schema$ListServicesResponse>):
       void|AxiosPromise<Schema$ListServicesResponse> {
@@ -2038,13 +2042,13 @@ export class Resource$Apps$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2106,13 +2110,13 @@ export class Resource$Apps$Services$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2162,13 +2166,13 @@ export class Resource$Apps$Services$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2221,10 +2225,12 @@ export class Resource$Apps$Services$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Version>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Version>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Version>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Version>,
       callback?: BodyResponseCallback<Schema$Version>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Version>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Version>,
       callback?: BodyResponseCallback<Schema$Version>):
       void|AxiosPromise<Schema$Version> {
     if (typeof options === 'function') {
@@ -2276,14 +2282,14 @@ export class Resource$Apps$Services$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListVersionsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListVersionsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListVersionsResponse>,
       callback?: BodyResponseCallback<Schema$ListVersionsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListVersionsResponse>,
       callback?: BodyResponseCallback<Schema$ListVersionsResponse>):
       void|AxiosPromise<Schema$ListVersionsResponse> {
@@ -2349,13 +2355,13 @@ export class Resource$Apps$Services$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2424,13 +2430,13 @@ export class Resource$Apps$Services$Versions$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  debug(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  debug(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   debug(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   debug(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2482,13 +2488,13 @@ export class Resource$Apps$Services$Versions$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2540,10 +2546,11 @@ export class Resource$Apps$Services$Versions$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Instance>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Instance>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Instance>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Instance>,
       callback?: BodyResponseCallback<Schema$Instance>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Instance>,
       callback?: BodyResponseCallback<Schema$Instance>):
       void|AxiosPromise<Schema$Instance> {
@@ -2598,14 +2605,15 @@ export class Resource$Apps$Services$Versions$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListInstancesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListInstancesResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ListInstancesResponse>,
       callback?: BodyResponseCallback<Schema$ListInstancesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListInstancesResponse>,
       callback?: BodyResponseCallback<Schema$ListInstancesResponse>):
diff --git a/src/apis/appsactivity/v1.ts b/src/apis/appsactivity/v1.ts
index 341a451410..9228e73e00 100644
--- a/src/apis/appsactivity/v1.ts
+++ b/src/apis/appsactivity/v1.ts
@@ -323,15 +323,15 @@ export class Resource$Activities {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListActivitiesResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListActivitiesResponse>,
       callback?: BodyResponseCallback<Schema$ListActivitiesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListActivitiesResponse>,
       callback?: BodyResponseCallback<Schema$ListActivitiesResponse>):
diff --git a/src/apis/appstate/v1.ts b/src/apis/appstate/v1.ts
index 36a8f3ce0e..1a23aa43d2 100644
--- a/src/apis/appstate/v1.ts
+++ b/src/apis/appstate/v1.ts
@@ -163,13 +163,14 @@ export class Resource$States {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  clear(params: any, options?: MethodOptions): AxiosPromise<Schema$WriteResult>;
+  clear(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$WriteResult>;
   clear(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$WriteResult>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$WriteResult>,
       callback?: BodyResponseCallback<Schema$WriteResult>): void;
   clear(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$WriteResult>,
       callback?: BodyResponseCallback<Schema$WriteResult>):
       void|AxiosPromise<Schema$WriteResult> {
@@ -220,12 +221,12 @@ export class Resource$States {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -271,11 +272,11 @@ export class Resource$States {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$GetResponse>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GetResponse>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$GetResponse>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GetResponse>,
       callback?: BodyResponseCallback<Schema$GetResponse>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GetResponse>,
       callback?: BodyResponseCallback<Schema$GetResponse>):
       void|AxiosPromise<Schema$GetResponse> {
@@ -322,13 +323,14 @@ export class Resource$States {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$ListResponse>;
+  list(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$ListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListResponse>,
       callback?: BodyResponseCallback<Schema$ListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListResponse>,
       callback?: BodyResponseCallback<Schema$ListResponse>):
       void|AxiosPromise<Schema$ListResponse> {
@@ -379,14 +381,14 @@ export class Resource$States {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$WriteResult>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$WriteResult>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$WriteResult>,
       callback?: BodyResponseCallback<Schema$WriteResult>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$WriteResult>,
       callback?: BodyResponseCallback<Schema$WriteResult>):
       void|AxiosPromise<Schema$WriteResult> {
diff --git a/src/apis/bigquery/v2.ts b/src/apis/bigquery/v2.ts
index 12fa605850..6329939193 100644
--- a/src/apis/bigquery/v2.ts
+++ b/src/apis/bigquery/v2.ts
@@ -1593,14 +1593,15 @@ export interface Schema$QueryResponse {
 }
 export interface Schema$QueryTimelineSample {
   /**
-   * Total number of active workers. This does not correspond directly to slot
-   * usage. This is the largest value observed since the last sample.
+   * Total number of units currently being processed by workers. This does not
+   * correspond directly to slot usage. This is the largest value observed since
+   * the last sample.
    */
-  activeInputs: string;
+  activeUnits: string;
   /**
    * Total parallel units of work completed by this query.
    */
-  completedInputs: string;
+  completedUnits: string;
   /**
    * Milliseconds elapsed since the start of query execution.
    */
@@ -1608,7 +1609,7 @@ export interface Schema$QueryTimelineSample {
   /**
    * Total parallel units of work remaining for the active stages.
    */
-  pendingInputs: string;
+  pendingUnits: string;
   /**
    * Cumulative slot-ms consumed by the query.
    */
@@ -2028,12 +2029,12 @@ export class Resource$Datasets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2135,10 +2136,12 @@ export class Resource$Datasets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Dataset>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Dataset>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Dataset>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Dataset>,
       callback?: BodyResponseCallback<Schema$Dataset>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Dataset>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Dataset>,
       callback?: BodyResponseCallback<Schema$Dataset>):
       void|AxiosPromise<Schema$Dataset> {
     if (typeof options === 'function') {
@@ -2242,12 +2245,14 @@ export class Resource$Datasets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Dataset>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Dataset>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Dataset>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Dataset>,
       callback?: BodyResponseCallback<Schema$Dataset>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Dataset>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Dataset>,
       callback?: BodyResponseCallback<Schema$Dataset>):
       void|AxiosPromise<Schema$Dataset> {
     if (typeof options === 'function') {
@@ -2363,13 +2368,13 @@ export class Resource$Datasets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$DatasetList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$DatasetList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DatasetList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DatasetList>,
       callback?: BodyResponseCallback<Schema$DatasetList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DatasetList>,
       callback?: BodyResponseCallback<Schema$DatasetList>):
       void|AxiosPromise<Schema$DatasetList> {
@@ -2482,12 +2487,14 @@ export class Resource$Datasets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Dataset>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Dataset>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Dataset>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Dataset>,
       callback?: BodyResponseCallback<Schema$Dataset>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Dataset>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Dataset>,
       callback?: BodyResponseCallback<Schema$Dataset>):
       void|AxiosPromise<Schema$Dataset> {
     if (typeof options === 'function') {
@@ -2599,12 +2606,14 @@ export class Resource$Datasets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Dataset>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Dataset>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Dataset>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Dataset>,
       callback?: BodyResponseCallback<Schema$Dataset>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Dataset>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Dataset>,
       callback?: BodyResponseCallback<Schema$Dataset>):
       void|AxiosPromise<Schema$Dataset> {
     if (typeof options === 'function') {
@@ -2722,14 +2731,14 @@ export class Resource$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancel(params: any, options?: MethodOptions):
+  cancel(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$JobCancelResponse>;
   cancel(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$JobCancelResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$JobCancelResponse>,
       callback?: BodyResponseCallback<Schema$JobCancelResponse>): void;
   cancel(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$JobCancelResponse>,
       callback?: BodyResponseCallback<Schema$JobCancelResponse>):
       void|AxiosPromise<Schema$JobCancelResponse> {
@@ -2836,10 +2845,10 @@ export class Resource$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Job>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>):
       void|AxiosPromise<Schema$Job> {
     if (typeof options === 'function') {
@@ -2959,15 +2968,15 @@ export class Resource$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getQueryResults(params: any, options?: MethodOptions):
+  getQueryResults(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GetQueryResultsResponse>;
   getQueryResults(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GetQueryResultsResponse>,
       callback?: BodyResponseCallback<Schema$GetQueryResultsResponse>): void;
   getQueryResults(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GetQueryResultsResponse>,
       callback?: BodyResponseCallback<Schema$GetQueryResultsResponse>):
@@ -3082,12 +3091,12 @@ export class Resource$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Job>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>):
       void|AxiosPromise<Schema$Job> {
     if (typeof options === 'function') {
@@ -3211,12 +3220,14 @@ export class Resource$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$JobList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$JobList>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$JobList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$JobList>,
       callback?: BodyResponseCallback<Schema$JobList>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$JobList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$JobList>,
       callback?: BodyResponseCallback<Schema$JobList>):
       void|AxiosPromise<Schema$JobList> {
     if (typeof options === 'function') {
@@ -3320,14 +3331,14 @@ export class Resource$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  query(params: any, options?: MethodOptions):
+  query(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$QueryResponse>;
   query(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$QueryResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$QueryResponse>,
       callback?: BodyResponseCallback<Schema$QueryResponse>): void;
   query(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$QueryResponse>,
       callback?: BodyResponseCallback<Schema$QueryResponse>):
       void|AxiosPromise<Schema$QueryResponse> {
@@ -3439,15 +3450,15 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getServiceAccount(params: any, options?: MethodOptions):
+  getServiceAccount(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GetServiceAccountResponse>;
   getServiceAccount(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GetServiceAccountResponse>,
       callback?: BodyResponseCallback<Schema$GetServiceAccountResponse>): void;
   getServiceAccount(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GetServiceAccountResponse>,
       callback?: BodyResponseCallback<Schema$GetServiceAccountResponse>):
@@ -3558,13 +3569,13 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$ProjectList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$ProjectList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ProjectList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ProjectList>,
       callback?: BodyResponseCallback<Schema$ProjectList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ProjectList>,
       callback?: BodyResponseCallback<Schema$ProjectList>):
       void|AxiosPromise<Schema$ProjectList> {
@@ -3689,15 +3700,15 @@ export class Resource$Tabledata {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insertAll(params: any, options?: MethodOptions):
+  insertAll(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TableDataInsertAllResponse>;
   insertAll(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TableDataInsertAllResponse>,
       callback?: BodyResponseCallback<Schema$TableDataInsertAllResponse>): void;
   insertAll(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TableDataInsertAllResponse>,
       callback?: BodyResponseCallback<Schema$TableDataInsertAllResponse>):
@@ -3825,14 +3836,14 @@ export class Resource$Tabledata {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TableDataList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TableDataList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TableDataList>,
       callback?: BodyResponseCallback<Schema$TableDataList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TableDataList>,
       callback?: BodyResponseCallback<Schema$TableDataList>):
       void|AxiosPromise<Schema$TableDataList> {
@@ -3951,12 +3962,12 @@ export class Resource$Tables {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -4066,10 +4077,10 @@ export class Resource$Tables {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Table>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Table>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Table>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
       callback?: BodyResponseCallback<Schema$Table>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
       callback?: BodyResponseCallback<Schema$Table>):
       void|AxiosPromise<Schema$Table> {
     if (typeof options === 'function') {
@@ -4178,12 +4189,12 @@ export class Resource$Tables {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Table>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Table>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Table>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
       callback?: BodyResponseCallback<Schema$Table>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
       callback?: BodyResponseCallback<Schema$Table>):
       void|AxiosPromise<Schema$Table> {
     if (typeof options === 'function') {
@@ -4303,13 +4314,13 @@ export class Resource$Tables {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$TableList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$TableList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TableList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TableList>,
       callback?: BodyResponseCallback<Schema$TableList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TableList>,
       callback?: BodyResponseCallback<Schema$TableList>):
       void|AxiosPromise<Schema$TableList> {
@@ -4428,12 +4439,12 @@ export class Resource$Tables {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Table>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Table>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Table>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
       callback?: BodyResponseCallback<Schema$Table>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
       callback?: BodyResponseCallback<Schema$Table>):
       void|AxiosPromise<Schema$Table> {
     if (typeof options === 'function') {
@@ -4550,12 +4561,12 @@ export class Resource$Tables {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Table>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Table>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Table>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
       callback?: BodyResponseCallback<Schema$Table>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
       callback?: BodyResponseCallback<Schema$Table>):
       void|AxiosPromise<Schema$Table> {
     if (typeof options === 'function') {
diff --git a/src/apis/bigquerydatatransfer/v1.ts b/src/apis/bigquerydatatransfer/v1.ts
index 953a52b220..dfc7e255c4 100644
--- a/src/apis/bigquerydatatransfer/v1.ts
+++ b/src/apis/bigquerydatatransfer/v1.ts
@@ -138,7 +138,7 @@ export interface Schema$DataSource {
    */
   minimumScheduleInterval: string;
   /**
-   * Data source resource name.
+   * Output only. Data source resource name.
    */
   name: string;
   /**
@@ -436,7 +436,7 @@ export interface Schema$Status {
  * `destination_dataset_id` specifies where data should be stored. When a new
  * transfer configuration is created, the specified `destination_dataset_id` is
  * created when needed and shared with the appropriate data source service
- * account. Next id: 21
+ * account.
  */
 export interface Schema$TransferConfig {
   /**
@@ -529,7 +529,7 @@ export interface Schema$TransferMessage {
   severity: string;
 }
 /**
- * Represents a data transfer run. Next id: 27
+ * Represents a data transfer run.
  */
 export interface Schema$TransferRun {
   /**
@@ -645,15 +645,15 @@ export class Resource$Projects$Datasources {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  checkValidCreds(params: any, options?: MethodOptions):
+  checkValidCreds(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CheckValidCredsResponse>;
   checkValidCreds(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$CheckValidCredsResponse>,
       callback?: BodyResponseCallback<Schema$CheckValidCredsResponse>): void;
   checkValidCreds(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$CheckValidCredsResponse>,
       callback?: BodyResponseCallback<Schema$CheckValidCredsResponse>):
@@ -703,11 +703,11 @@ export class Resource$Projects$Datasources {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$DataSource>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DataSource>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$DataSource>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DataSource>,
       callback?: BodyResponseCallback<Schema$DataSource>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DataSource>,
       callback?: BodyResponseCallback<Schema$DataSource>):
       void|AxiosPromise<Schema$DataSource> {
@@ -757,15 +757,15 @@ export class Resource$Projects$Datasources {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListDataSourcesResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListDataSourcesResponse>,
       callback?: BodyResponseCallback<Schema$ListDataSourcesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListDataSourcesResponse>,
       callback?: BodyResponseCallback<Schema$ListDataSourcesResponse>):
@@ -831,10 +831,11 @@ export class Resource$Projects$Locations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Location>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Location>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Location>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Location>,
       callback?: BodyResponseCallback<Schema$Location>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Location>,
       callback?: BodyResponseCallback<Schema$Location>):
       void|AxiosPromise<Schema$Location> {
@@ -884,14 +885,15 @@ export class Resource$Projects$Locations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListLocationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListLocationsResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ListLocationsResponse>,
       callback?: BodyResponseCallback<Schema$ListLocationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListLocationsResponse>,
       callback?: BodyResponseCallback<Schema$ListLocationsResponse>):
@@ -956,15 +958,15 @@ export class Resource$Projects$Locations$Datasources {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  checkValidCreds(params: any, options?: MethodOptions):
+  checkValidCreds(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CheckValidCredsResponse>;
   checkValidCreds(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$CheckValidCredsResponse>,
       callback?: BodyResponseCallback<Schema$CheckValidCredsResponse>): void;
   checkValidCreds(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$CheckValidCredsResponse>,
       callback?: BodyResponseCallback<Schema$CheckValidCredsResponse>):
@@ -1014,11 +1016,11 @@ export class Resource$Projects$Locations$Datasources {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$DataSource>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DataSource>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$DataSource>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DataSource>,
       callback?: BodyResponseCallback<Schema$DataSource>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DataSource>,
       callback?: BodyResponseCallback<Schema$DataSource>):
       void|AxiosPromise<Schema$DataSource> {
@@ -1068,15 +1070,15 @@ export class Resource$Projects$Locations$Datasources {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListDataSourcesResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListDataSourcesResponse>,
       callback?: BodyResponseCallback<Schema$ListDataSourcesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListDataSourcesResponse>,
       callback?: BodyResponseCallback<Schema$ListDataSourcesResponse>):
@@ -1141,14 +1143,14 @@ export class Resource$Projects$Locations$Transferconfigs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TransferConfig>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TransferConfig>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TransferConfig>,
       callback?: BodyResponseCallback<Schema$TransferConfig>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TransferConfig>,
       callback?: BodyResponseCallback<Schema$TransferConfig>):
       void|AxiosPromise<Schema$TransferConfig> {
@@ -1197,12 +1199,12 @@ export class Resource$Projects$Locations$Transferconfigs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1248,12 +1250,12 @@ export class Resource$Projects$Locations$Transferconfigs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$TransferConfig>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TransferConfig>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TransferConfig>,
       callback?: BodyResponseCallback<Schema$TransferConfig>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TransferConfig>,
       callback?: BodyResponseCallback<Schema$TransferConfig>):
       void|AxiosPromise<Schema$TransferConfig> {
@@ -1303,16 +1305,16 @@ export class Resource$Projects$Locations$Transferconfigs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListTransferConfigsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListTransferConfigsResponse>,
       callback?: BodyResponseCallback<Schema$ListTransferConfigsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListTransferConfigsResponse>,
       callback?: BodyResponseCallback<Schema$ListTransferConfigsResponse>):
@@ -1366,14 +1368,14 @@ export class Resource$Projects$Locations$Transferconfigs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TransferConfig>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TransferConfig>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TransferConfig>,
       callback?: BodyResponseCallback<Schema$TransferConfig>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TransferConfig>,
       callback?: BodyResponseCallback<Schema$TransferConfig>):
       void|AxiosPromise<Schema$TransferConfig> {
@@ -1424,16 +1426,16 @@ export class Resource$Projects$Locations$Transferconfigs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  scheduleRuns(params: any, options?: MethodOptions):
+  scheduleRuns(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ScheduleTransferRunsResponse>;
   scheduleRuns(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ScheduleTransferRunsResponse>,
       callback?: BodyResponseCallback<Schema$ScheduleTransferRunsResponse>):
       void;
   scheduleRuns(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ScheduleTransferRunsResponse>,
       callback?: BodyResponseCallback<Schema$ScheduleTransferRunsResponse>):
@@ -1497,12 +1499,12 @@ export class Resource$Projects$Locations$Transferconfigs$Runs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1548,11 +1550,11 @@ export class Resource$Projects$Locations$Transferconfigs$Runs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$TransferRun>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TransferRun>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$TransferRun>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TransferRun>,
       callback?: BodyResponseCallback<Schema$TransferRun>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TransferRun>,
       callback?: BodyResponseCallback<Schema$TransferRun>):
       void|AxiosPromise<Schema$TransferRun> {
@@ -1603,15 +1605,15 @@ export class Resource$Projects$Locations$Transferconfigs$Runs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListTransferRunsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListTransferRunsResponse>,
       callback?: BodyResponseCallback<Schema$ListTransferRunsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListTransferRunsResponse>,
       callback?: BodyResponseCallback<Schema$ListTransferRunsResponse>):
@@ -1674,15 +1676,15 @@ export class Resource$Projects$Locations$Transferconfigs$Runs$Transferlogs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListTransferLogsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListTransferLogsResponse>,
       callback?: BodyResponseCallback<Schema$ListTransferLogsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListTransferLogsResponse>,
       callback?: BodyResponseCallback<Schema$ListTransferLogsResponse>):
@@ -1749,14 +1751,14 @@ export class Resource$Projects$Transferconfigs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TransferConfig>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TransferConfig>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TransferConfig>,
       callback?: BodyResponseCallback<Schema$TransferConfig>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TransferConfig>,
       callback?: BodyResponseCallback<Schema$TransferConfig>):
       void|AxiosPromise<Schema$TransferConfig> {
@@ -1805,12 +1807,12 @@ export class Resource$Projects$Transferconfigs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1856,12 +1858,12 @@ export class Resource$Projects$Transferconfigs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$TransferConfig>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TransferConfig>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TransferConfig>,
       callback?: BodyResponseCallback<Schema$TransferConfig>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TransferConfig>,
       callback?: BodyResponseCallback<Schema$TransferConfig>):
       void|AxiosPromise<Schema$TransferConfig> {
@@ -1911,16 +1913,16 @@ export class Resource$Projects$Transferconfigs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListTransferConfigsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListTransferConfigsResponse>,
       callback?: BodyResponseCallback<Schema$ListTransferConfigsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListTransferConfigsResponse>,
       callback?: BodyResponseCallback<Schema$ListTransferConfigsResponse>):
@@ -1974,14 +1976,14 @@ export class Resource$Projects$Transferconfigs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TransferConfig>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TransferConfig>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TransferConfig>,
       callback?: BodyResponseCallback<Schema$TransferConfig>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TransferConfig>,
       callback?: BodyResponseCallback<Schema$TransferConfig>):
       void|AxiosPromise<Schema$TransferConfig> {
@@ -2032,16 +2034,16 @@ export class Resource$Projects$Transferconfigs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  scheduleRuns(params: any, options?: MethodOptions):
+  scheduleRuns(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ScheduleTransferRunsResponse>;
   scheduleRuns(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ScheduleTransferRunsResponse>,
       callback?: BodyResponseCallback<Schema$ScheduleTransferRunsResponse>):
       void;
   scheduleRuns(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ScheduleTransferRunsResponse>,
       callback?: BodyResponseCallback<Schema$ScheduleTransferRunsResponse>):
@@ -2105,12 +2107,12 @@ export class Resource$Projects$Transferconfigs$Runs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2156,11 +2158,11 @@ export class Resource$Projects$Transferconfigs$Runs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$TransferRun>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TransferRun>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$TransferRun>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TransferRun>,
       callback?: BodyResponseCallback<Schema$TransferRun>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TransferRun>,
       callback?: BodyResponseCallback<Schema$TransferRun>):
       void|AxiosPromise<Schema$TransferRun> {
@@ -2211,15 +2213,15 @@ export class Resource$Projects$Transferconfigs$Runs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListTransferRunsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListTransferRunsResponse>,
       callback?: BodyResponseCallback<Schema$ListTransferRunsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListTransferRunsResponse>,
       callback?: BodyResponseCallback<Schema$ListTransferRunsResponse>):
@@ -2281,15 +2283,15 @@ export class Resource$Projects$Transferconfigs$Runs$Transferlogs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListTransferLogsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListTransferLogsResponse>,
       callback?: BodyResponseCallback<Schema$ListTransferLogsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListTransferLogsResponse>,
       callback?: BodyResponseCallback<Schema$ListTransferLogsResponse>):
diff --git a/src/apis/blogger/v2.ts b/src/apis/blogger/v2.ts
index ab675670b1..23fb7a6dbd 100644
--- a/src/apis/blogger/v2.ts
+++ b/src/apis/blogger/v2.ts
@@ -371,10 +371,10 @@ export class Resource$Blogs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Blog>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Blog>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Blog>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Blog>,
       callback?: BodyResponseCallback<Schema$Blog>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Blog>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Blog>,
       callback?: BodyResponseCallback<Schema$Blog>):
       void|AxiosPromise<Schema$Blog> {
     if (typeof options === 'function') {
@@ -434,10 +434,12 @@ export class Resource$Comments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Comment>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Comment>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Comment>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
       callback?: BodyResponseCallback<Schema$Comment>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
       callback?: BodyResponseCallback<Schema$Comment>):
       void|AxiosPromise<Schema$Comment> {
     if (typeof options === 'function') {
@@ -490,13 +492,13 @@ export class Resource$Comments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$CommentList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$CommentList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CommentList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CommentList>,
       callback?: BodyResponseCallback<Schema$CommentList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CommentList>,
       callback?: BodyResponseCallback<Schema$CommentList>):
       void|AxiosPromise<Schema$CommentList> {
@@ -557,10 +559,10 @@ export class Resource$Pages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Page>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Page>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Page>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Page>,
       callback?: BodyResponseCallback<Schema$Page>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Page>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Page>,
       callback?: BodyResponseCallback<Schema$Page>):
       void|AxiosPromise<Schema$Page> {
     if (typeof options === 'function') {
@@ -607,12 +609,13 @@ export class Resource$Pages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$PageList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$PageList>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$PageList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PageList>,
       callback?: BodyResponseCallback<Schema$PageList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PageList>,
       callback?: BodyResponseCallback<Schema$PageList>):
       void|AxiosPromise<Schema$PageList> {
@@ -672,10 +675,10 @@ export class Resource$Posts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Post>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Post>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Post>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Post>,
       callback?: BodyResponseCallback<Schema$Post>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Post>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Post>,
       callback?: BodyResponseCallback<Schema$Post>):
       void|AxiosPromise<Schema$Post> {
     if (typeof options === 'function') {
@@ -725,12 +728,13 @@ export class Resource$Posts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$PostList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$PostList>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$PostList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PostList>,
       callback?: BodyResponseCallback<Schema$PostList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PostList>,
       callback?: BodyResponseCallback<Schema$PostList>):
       void|AxiosPromise<Schema$PostList> {
@@ -791,10 +795,10 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$User>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$User>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$User>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$User>,
       callback?: BodyResponseCallback<Schema$User>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$User>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$User>,
       callback?: BodyResponseCallback<Schema$User>):
       void|AxiosPromise<Schema$User> {
     if (typeof options === 'function') {
@@ -851,12 +855,13 @@ export class Resource$Users$Blogs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$BlogList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$BlogList>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$BlogList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BlogList>,
       callback?: BodyResponseCallback<Schema$BlogList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BlogList>,
       callback?: BodyResponseCallback<Schema$BlogList>):
       void|AxiosPromise<Schema$BlogList> {
diff --git a/src/apis/blogger/v3.ts b/src/apis/blogger/v3.ts
index 41adc53fe7..11ff4a05c9 100644
--- a/src/apis/blogger/v3.ts
+++ b/src/apis/blogger/v3.ts
@@ -548,10 +548,10 @@ export class Resource$Blogs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Blog>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Blog>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Blog>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Blog>,
       callback?: BodyResponseCallback<Schema$Blog>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Blog>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Blog>,
       callback?: BodyResponseCallback<Schema$Blog>):
       void|AxiosPromise<Schema$Blog> {
     if (typeof options === 'function') {
@@ -598,12 +598,12 @@ export class Resource$Blogs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getByUrl(params: any, options?: MethodOptions): AxiosPromise<Schema$Blog>;
+  getByUrl(params?: any, options?: MethodOptions): AxiosPromise<Schema$Blog>;
   getByUrl(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Blog>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Blog>,
       callback?: BodyResponseCallback<Schema$Blog>): void;
   getByUrl(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Blog>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Blog>,
       callback?: BodyResponseCallback<Schema$Blog>):
       void|AxiosPromise<Schema$Blog> {
     if (typeof options === 'function') {
@@ -653,13 +653,14 @@ export class Resource$Blogs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listByUser(params: any, options?: MethodOptions):
+  listByUser(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BlogList>;
   listByUser(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$BlogList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BlogList>,
       callback?: BodyResponseCallback<Schema$BlogList>): void;
   listByUser(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BlogList>,
       callback?: BodyResponseCallback<Schema$BlogList>):
       void|AxiosPromise<Schema$BlogList> {
@@ -720,11 +721,11 @@ export class Resource$Bloguserinfos {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$BlogUserInfo>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BlogUserInfo>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$BlogUserInfo>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BlogUserInfo>,
       callback?: BodyResponseCallback<Schema$BlogUserInfo>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BlogUserInfo>,
       callback?: BodyResponseCallback<Schema$BlogUserInfo>):
       void|AxiosPromise<Schema$BlogUserInfo> {
@@ -785,12 +786,14 @@ export class Resource$Comments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  approve(params: any, options?: MethodOptions): AxiosPromise<Schema$Comment>;
+  approve(params?: any, options?: MethodOptions): AxiosPromise<Schema$Comment>;
   approve(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Comment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
       callback?: BodyResponseCallback<Schema$Comment>): void;
   approve(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
       callback?: BodyResponseCallback<Schema$Comment>):
       void|AxiosPromise<Schema$Comment> {
     if (typeof options === 'function') {
@@ -840,12 +843,12 @@ export class Resource$Comments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -895,10 +898,12 @@ export class Resource$Comments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Comment>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Comment>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Comment>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
       callback?: BodyResponseCallback<Schema$Comment>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
       callback?: BodyResponseCallback<Schema$Comment>):
       void|AxiosPromise<Schema$Comment> {
     if (typeof options === 'function') {
@@ -954,13 +959,13 @@ export class Resource$Comments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$CommentList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$CommentList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CommentList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CommentList>,
       callback?: BodyResponseCallback<Schema$CommentList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CommentList>,
       callback?: BodyResponseCallback<Schema$CommentList>):
       void|AxiosPromise<Schema$CommentList> {
@@ -1015,14 +1020,14 @@ export class Resource$Comments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listByBlog(params: any, options?: MethodOptions):
+  listByBlog(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CommentList>;
   listByBlog(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CommentList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CommentList>,
       callback?: BodyResponseCallback<Schema$CommentList>): void;
   listByBlog(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CommentList>,
       callback?: BodyResponseCallback<Schema$CommentList>):
       void|AxiosPromise<Schema$CommentList> {
@@ -1071,13 +1076,15 @@ export class Resource$Comments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  markAsSpam(params: any, options?: MethodOptions):
+  markAsSpam(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Comment>;
   markAsSpam(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Comment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
       callback?: BodyResponseCallback<Schema$Comment>): void;
   markAsSpam(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
       callback?: BodyResponseCallback<Schema$Comment>):
       void|AxiosPromise<Schema$Comment> {
     if (typeof options === 'function') {
@@ -1127,13 +1134,15 @@ export class Resource$Comments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  removeContent(params: any, options?: MethodOptions):
+  removeContent(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Comment>;
   removeContent(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Comment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
       callback?: BodyResponseCallback<Schema$Comment>): void;
   removeContent(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
       callback?: BodyResponseCallback<Schema$Comment>):
       void|AxiosPromise<Schema$Comment> {
     if (typeof options === 'function') {
@@ -1194,12 +1203,12 @@ export class Resource$Pages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1246,10 +1255,10 @@ export class Resource$Pages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Page>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Page>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Page>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Page>,
       callback?: BodyResponseCallback<Schema$Page>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Page>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Page>,
       callback?: BodyResponseCallback<Schema$Page>):
       void|AxiosPromise<Schema$Page> {
     if (typeof options === 'function') {
@@ -1297,12 +1306,12 @@ export class Resource$Pages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Page>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Page>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Page>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Page>,
       callback?: BodyResponseCallback<Schema$Page>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Page>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Page>,
       callback?: BodyResponseCallback<Schema$Page>):
       void|AxiosPromise<Schema$Page> {
     if (typeof options === 'function') {
@@ -1354,12 +1363,13 @@ export class Resource$Pages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$PageList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$PageList>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$PageList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PageList>,
       callback?: BodyResponseCallback<Schema$PageList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PageList>,
       callback?: BodyResponseCallback<Schema$PageList>):
       void|AxiosPromise<Schema$PageList> {
@@ -1410,12 +1420,12 @@ export class Resource$Pages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Page>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Page>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Page>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Page>,
       callback?: BodyResponseCallback<Schema$Page>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Page>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Page>,
       callback?: BodyResponseCallback<Schema$Page>):
       void|AxiosPromise<Schema$Page> {
     if (typeof options === 'function') {
@@ -1462,12 +1472,12 @@ export class Resource$Pages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  publish(params: any, options?: MethodOptions): AxiosPromise<Schema$Page>;
+  publish(params?: any, options?: MethodOptions): AxiosPromise<Schema$Page>;
   publish(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Page>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Page>,
       callback?: BodyResponseCallback<Schema$Page>): void;
   publish(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Page>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Page>,
       callback?: BodyResponseCallback<Schema$Page>):
       void|AxiosPromise<Schema$Page> {
     if (typeof options === 'function') {
@@ -1514,12 +1524,12 @@ export class Resource$Pages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  revert(params: any, options?: MethodOptions): AxiosPromise<Schema$Page>;
+  revert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Page>;
   revert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Page>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Page>,
       callback?: BodyResponseCallback<Schema$Page>): void;
   revert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Page>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Page>,
       callback?: BodyResponseCallback<Schema$Page>):
       void|AxiosPromise<Schema$Page> {
     if (typeof options === 'function') {
@@ -1569,12 +1579,12 @@ export class Resource$Pages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Page>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Page>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Page>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Page>,
       callback?: BodyResponseCallback<Schema$Page>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Page>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Page>,
       callback?: BodyResponseCallback<Schema$Page>):
       void|AxiosPromise<Schema$Page> {
     if (typeof options === 'function') {
@@ -1633,11 +1643,11 @@ export class Resource$Pageviews {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Pageviews>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Pageviews>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Pageviews>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Pageviews>,
       callback?: BodyResponseCallback<Schema$Pageviews>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Pageviews>,
       callback?: BodyResponseCallback<Schema$Pageviews>):
       void|AxiosPromise<Schema$Pageviews> {
@@ -1697,12 +1707,12 @@ export class Resource$Posts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1752,10 +1762,10 @@ export class Resource$Posts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Post>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Post>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Post>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Post>,
       callback?: BodyResponseCallback<Schema$Post>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Post>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Post>,
       callback?: BodyResponseCallback<Schema$Post>):
       void|AxiosPromise<Schema$Post> {
     if (typeof options === 'function') {
@@ -1804,12 +1814,12 @@ export class Resource$Posts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getByPath(params: any, options?: MethodOptions): AxiosPromise<Schema$Post>;
+  getByPath(params?: any, options?: MethodOptions): AxiosPromise<Schema$Post>;
   getByPath(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Post>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Post>,
       callback?: BodyResponseCallback<Schema$Post>): void;
   getByPath(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Post>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Post>,
       callback?: BodyResponseCallback<Schema$Post>):
       void|AxiosPromise<Schema$Post> {
     if (typeof options === 'function') {
@@ -1859,12 +1869,12 @@ export class Resource$Posts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Post>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Post>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Post>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Post>,
       callback?: BodyResponseCallback<Schema$Post>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Post>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Post>,
       callback?: BodyResponseCallback<Schema$Post>):
       void|AxiosPromise<Schema$Post> {
     if (typeof options === 'function') {
@@ -1920,12 +1930,13 @@ export class Resource$Posts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$PostList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$PostList>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$PostList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PostList>,
       callback?: BodyResponseCallback<Schema$PostList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PostList>,
       callback?: BodyResponseCallback<Schema$PostList>):
       void|AxiosPromise<Schema$PostList> {
@@ -1979,12 +1990,12 @@ export class Resource$Posts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Post>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Post>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Post>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Post>,
       callback?: BodyResponseCallback<Schema$Post>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Post>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Post>,
       callback?: BodyResponseCallback<Schema$Post>):
       void|AxiosPromise<Schema$Post> {
     if (typeof options === 'function') {
@@ -2033,12 +2044,12 @@ export class Resource$Posts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  publish(params: any, options?: MethodOptions): AxiosPromise<Schema$Post>;
+  publish(params?: any, options?: MethodOptions): AxiosPromise<Schema$Post>;
   publish(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Post>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Post>,
       callback?: BodyResponseCallback<Schema$Post>): void;
   publish(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Post>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Post>,
       callback?: BodyResponseCallback<Schema$Post>):
       void|AxiosPromise<Schema$Post> {
     if (typeof options === 'function') {
@@ -2085,12 +2096,12 @@ export class Resource$Posts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  revert(params: any, options?: MethodOptions): AxiosPromise<Schema$Post>;
+  revert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Post>;
   revert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Post>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Post>,
       callback?: BodyResponseCallback<Schema$Post>): void;
   revert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Post>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Post>,
       callback?: BodyResponseCallback<Schema$Post>):
       void|AxiosPromise<Schema$Post> {
     if (typeof options === 'function') {
@@ -2139,12 +2150,13 @@ export class Resource$Posts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  search(params: any, options?: MethodOptions): AxiosPromise<Schema$PostList>;
+  search(params?: any, options?: MethodOptions): AxiosPromise<Schema$PostList>;
   search(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$PostList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PostList>,
       callback?: BodyResponseCallback<Schema$PostList>): void;
   search(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PostList>,
       callback?: BodyResponseCallback<Schema$PostList>):
       void|AxiosPromise<Schema$PostList> {
@@ -2198,12 +2210,12 @@ export class Resource$Posts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Post>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Post>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Post>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Post>,
       callback?: BodyResponseCallback<Schema$Post>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Post>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Post>,
       callback?: BodyResponseCallback<Schema$Post>):
       void|AxiosPromise<Schema$Post> {
     if (typeof options === 'function') {
@@ -2266,11 +2278,11 @@ export class Resource$Postuserinfos {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$PostUserInfo>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PostUserInfo>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$PostUserInfo>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PostUserInfo>,
       callback?: BodyResponseCallback<Schema$PostUserInfo>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PostUserInfo>,
       callback?: BodyResponseCallback<Schema$PostUserInfo>):
       void|AxiosPromise<Schema$PostUserInfo> {
@@ -2330,14 +2342,14 @@ export class Resource$Postuserinfos {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PostUserInfosList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PostUserInfosList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PostUserInfosList>,
       callback?: BodyResponseCallback<Schema$PostUserInfosList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PostUserInfosList>,
       callback?: BodyResponseCallback<Schema$PostUserInfosList>):
       void|AxiosPromise<Schema$PostUserInfosList> {
@@ -2396,10 +2408,10 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$User>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$User>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$User>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$User>,
       callback?: BodyResponseCallback<Schema$User>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$User>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$User>,
       callback?: BodyResponseCallback<Schema$User>):
       void|AxiosPromise<Schema$User> {
     if (typeof options === 'function') {
diff --git a/src/apis/books/v1.ts b/src/apis/books/v1.ts
index d40a3d8c12..81e0ffbaa9 100644
--- a/src/apis/books/v1.ts
+++ b/src/apis/books/v1.ts
@@ -905,11 +905,11 @@ export class Resource$Bookshelves {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Bookshelf>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Bookshelf>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Bookshelf>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Bookshelf>,
       callback?: BodyResponseCallback<Schema$Bookshelf>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Bookshelf>,
       callback?: BodyResponseCallback<Schema$Bookshelf>):
       void|AxiosPromise<Schema$Bookshelf> {
@@ -957,13 +957,13 @@ export class Resource$Bookshelves {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Bookshelves>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Bookshelves>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Bookshelves>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Bookshelves>,
       callback?: BodyResponseCallback<Schema$Bookshelves>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Bookshelves>,
       callback?: BodyResponseCallback<Schema$Bookshelves>):
       void|AxiosPromise<Schema$Bookshelves> {
@@ -1026,12 +1026,14 @@ export class Resource$Bookshelves$Volumes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Volumes>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Volumes>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Volumes>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Volumes>,
       callback?: BodyResponseCallback<Schema$Volumes>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Volumes>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Volumes>,
       callback?: BodyResponseCallback<Schema$Volumes>):
       void|AxiosPromise<Schema$Volumes> {
     if (typeof options === 'function') {
@@ -1093,15 +1095,15 @@ export class Resource$Cloudloading {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  addBook(params: any, options?: MethodOptions):
+  addBook(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BooksCloudloadingResource>;
   addBook(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$BooksCloudloadingResource>,
       callback?: BodyResponseCallback<Schema$BooksCloudloadingResource>): void;
   addBook(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$BooksCloudloadingResource>,
       callback?: BodyResponseCallback<Schema$BooksCloudloadingResource>):
@@ -1149,12 +1151,12 @@ export class Resource$Cloudloading {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  deleteBook(params: any, options?: MethodOptions): AxiosPromise<void>;
+  deleteBook(params?: any, options?: MethodOptions): AxiosPromise<void>;
   deleteBook(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   deleteBook(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1198,15 +1200,15 @@ export class Resource$Cloudloading {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  updateBook(params: any, options?: MethodOptions):
+  updateBook(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BooksCloudloadingResource>;
   updateBook(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$BooksCloudloadingResource>,
       callback?: BodyResponseCallback<Schema$BooksCloudloadingResource>): void;
   updateBook(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$BooksCloudloadingResource>,
       callback?: BodyResponseCallback<Schema$BooksCloudloadingResource>):
@@ -1266,13 +1268,14 @@ export class Resource$Dictionary {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listOfflineMetadata(params: any, options?: MethodOptions):
+  listOfflineMetadata(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Metadata>;
   listOfflineMetadata(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Metadata>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Metadata>,
       callback?: BodyResponseCallback<Schema$Metadata>): void;
   listOfflineMetadata(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Metadata>,
       callback?: BodyResponseCallback<Schema$Metadata>):
       void|AxiosPromise<Schema$Metadata> {
@@ -1331,14 +1334,14 @@ export class Resource$Familysharing {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getFamilyInfo(params: any, options?: MethodOptions):
+  getFamilyInfo(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FamilyInfo>;
   getFamilyInfo(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$FamilyInfo>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$FamilyInfo>,
       callback?: BodyResponseCallback<Schema$FamilyInfo>): void;
   getFamilyInfo(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$FamilyInfo>,
       callback?: BodyResponseCallback<Schema$FamilyInfo>):
       void|AxiosPromise<Schema$FamilyInfo> {
@@ -1388,12 +1391,12 @@ export class Resource$Familysharing {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  share(params: any, options?: MethodOptions): AxiosPromise<void>;
+  share(params?: any, options?: MethodOptions): AxiosPromise<void>;
   share(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   share(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1441,12 +1444,12 @@ export class Resource$Familysharing {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  unshare(params: any, options?: MethodOptions): AxiosPromise<void>;
+  unshare(params?: any, options?: MethodOptions): AxiosPromise<void>;
   unshare(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   unshare(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1510,11 +1513,11 @@ export class Resource$Layers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Layersummary>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Layersummary>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Layersummary>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Layersummary>,
       callback?: BodyResponseCallback<Schema$Layersummary>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Layersummary>,
       callback?: BodyResponseCallback<Schema$Layersummary>):
       void|AxiosPromise<Schema$Layersummary> {
@@ -1566,14 +1569,14 @@ export class Resource$Layers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Layersummaries>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Layersummaries>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Layersummaries>,
       callback?: BodyResponseCallback<Schema$Layersummaries>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Layersummaries>,
       callback?: BodyResponseCallback<Schema$Layersummaries>):
       void|AxiosPromise<Schema$Layersummaries> {
@@ -1640,12 +1643,12 @@ export class Resource$Layers$Annotationdata {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$Annotationdata>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Annotationdata>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Annotationdata>,
       callback?: BodyResponseCallback<Schema$Annotationdata>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Annotationdata>,
       callback?: BodyResponseCallback<Schema$Annotationdata>):
       void|AxiosPromise<Schema$Annotationdata> {
@@ -1707,14 +1710,14 @@ export class Resource$Layers$Annotationdata {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Annotationsdata>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Annotationsdata>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Annotationsdata>,
       callback?: BodyResponseCallback<Schema$Annotationsdata>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Annotationsdata>,
       callback?: BodyResponseCallback<Schema$Annotationsdata>):
       void|AxiosPromise<Schema$Annotationsdata> {
@@ -1778,12 +1781,12 @@ export class Resource$Layers$Volumeannotations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$Volumeannotation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Volumeannotation>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Volumeannotation>,
       callback?: BodyResponseCallback<Schema$Volumeannotation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Volumeannotation>,
       callback?: BodyResponseCallback<Schema$Volumeannotation>):
       void|AxiosPromise<Schema$Volumeannotation> {
@@ -1846,14 +1849,14 @@ export class Resource$Layers$Volumeannotations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Volumeannotations>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Volumeannotations>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Volumeannotations>,
       callback?: BodyResponseCallback<Schema$Volumeannotations>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Volumeannotations>,
       callback?: BodyResponseCallback<Schema$Volumeannotations>):
       void|AxiosPromise<Schema$Volumeannotations> {
@@ -1912,14 +1915,14 @@ export class Resource$Myconfig {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getUserSettings(params: any, options?: MethodOptions):
+  getUserSettings(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Usersettings>;
   getUserSettings(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Usersettings>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Usersettings>,
       callback?: BodyResponseCallback<Schema$Usersettings>): void;
   getUserSettings(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Usersettings>,
       callback?: BodyResponseCallback<Schema$Usersettings>):
       void|AxiosPromise<Schema$Usersettings> {
@@ -1969,14 +1972,14 @@ export class Resource$Myconfig {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  releaseDownloadAccess(params: any, options?: MethodOptions):
+  releaseDownloadAccess(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DownloadAccesses>;
   releaseDownloadAccess(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DownloadAccesses>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DownloadAccesses>,
       callback?: BodyResponseCallback<Schema$DownloadAccesses>): void;
   releaseDownloadAccess(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DownloadAccesses>,
       callback?: BodyResponseCallback<Schema$DownloadAccesses>):
       void|AxiosPromise<Schema$DownloadAccesses> {
@@ -2028,14 +2031,14 @@ export class Resource$Myconfig {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  requestAccess(params: any, options?: MethodOptions):
+  requestAccess(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RequestAccess>;
   requestAccess(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RequestAccess>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RequestAccess>,
       callback?: BodyResponseCallback<Schema$RequestAccess>): void;
   requestAccess(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RequestAccess>,
       callback?: BodyResponseCallback<Schema$RequestAccess>):
       void|AxiosPromise<Schema$RequestAccess> {
@@ -2090,13 +2093,15 @@ export class Resource$Myconfig {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  syncVolumeLicenses(params: any, options?: MethodOptions):
+  syncVolumeLicenses(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Volumes>;
   syncVolumeLicenses(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Volumes>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Volumes>,
       callback?: BodyResponseCallback<Schema$Volumes>): void;
   syncVolumeLicenses(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Volumes>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Volumes>,
       callback?: BodyResponseCallback<Schema$Volumes>):
       void|AxiosPromise<Schema$Volumes> {
     if (typeof options === 'function') {
@@ -2144,14 +2149,14 @@ export class Resource$Myconfig {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  updateUserSettings(params: any, options?: MethodOptions):
+  updateUserSettings(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Usersettings>;
   updateUserSettings(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Usersettings>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Usersettings>,
       callback?: BodyResponseCallback<Schema$Usersettings>): void;
   updateUserSettings(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Usersettings>,
       callback?: BodyResponseCallback<Schema$Usersettings>):
       void|AxiosPromise<Schema$Usersettings> {
@@ -2228,12 +2233,12 @@ export class Resource$Mylibrary$Annotations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2282,13 +2287,14 @@ export class Resource$Mylibrary$Annotations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Annotation>;
+  insert(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Annotation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Annotation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Annotation>,
       callback?: BodyResponseCallback<Schema$Annotation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Annotation>,
       callback?: BodyResponseCallback<Schema$Annotation>):
       void|AxiosPromise<Schema$Annotation> {
@@ -2344,13 +2350,13 @@ export class Resource$Mylibrary$Annotations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Annotations>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Annotations>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Annotations>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Annotations>,
       callback?: BodyResponseCallback<Schema$Annotations>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Annotations>,
       callback?: BodyResponseCallback<Schema$Annotations>):
       void|AxiosPromise<Schema$Annotations> {
@@ -2398,14 +2404,14 @@ export class Resource$Mylibrary$Annotations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  summary(params: any, options?: MethodOptions):
+  summary(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AnnotationsSummary>;
   summary(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AnnotationsSummary>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AnnotationsSummary>,
       callback?: BodyResponseCallback<Schema$AnnotationsSummary>): void;
   summary(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AnnotationsSummary>,
       callback?: BodyResponseCallback<Schema$AnnotationsSummary>):
       void|AxiosPromise<Schema$AnnotationsSummary> {
@@ -2454,13 +2460,14 @@ export class Resource$Mylibrary$Annotations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Annotation>;
+  update(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Annotation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Annotation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Annotation>,
       callback?: BodyResponseCallback<Schema$Annotation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Annotation>,
       callback?: BodyResponseCallback<Schema$Annotation>):
       void|AxiosPromise<Schema$Annotation> {
@@ -2524,12 +2531,12 @@ export class Resource$Mylibrary$Bookshelves {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  addVolume(params: any, options?: MethodOptions): AxiosPromise<void>;
+  addVolume(params?: any, options?: MethodOptions): AxiosPromise<void>;
   addVolume(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   addVolume(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2575,12 +2582,12 @@ export class Resource$Mylibrary$Bookshelves {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  clearVolumes(params: any, options?: MethodOptions): AxiosPromise<void>;
+  clearVolumes(params?: any, options?: MethodOptions): AxiosPromise<void>;
   clearVolumes(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   clearVolumes(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2628,11 +2635,11 @@ export class Resource$Mylibrary$Bookshelves {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Bookshelf>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Bookshelf>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Bookshelf>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Bookshelf>,
       callback?: BodyResponseCallback<Schema$Bookshelf>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Bookshelf>,
       callback?: BodyResponseCallback<Schema$Bookshelf>):
       void|AxiosPromise<Schema$Bookshelf> {
@@ -2679,13 +2686,13 @@ export class Resource$Mylibrary$Bookshelves {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Bookshelves>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Bookshelves>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Bookshelves>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Bookshelves>,
       callback?: BodyResponseCallback<Schema$Bookshelves>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Bookshelves>,
       callback?: BodyResponseCallback<Schema$Bookshelves>):
       void|AxiosPromise<Schema$Bookshelves> {
@@ -2735,12 +2742,12 @@ export class Resource$Mylibrary$Bookshelves {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  moveVolume(params: any, options?: MethodOptions): AxiosPromise<void>;
+  moveVolume(params?: any, options?: MethodOptions): AxiosPromise<void>;
   moveVolume(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   moveVolume(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2789,12 +2796,12 @@ export class Resource$Mylibrary$Bookshelves {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  removeVolume(params: any, options?: MethodOptions): AxiosPromise<void>;
+  removeVolume(params?: any, options?: MethodOptions): AxiosPromise<void>;
   removeVolume(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   removeVolume(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2858,12 +2865,14 @@ export class Resource$Mylibrary$Bookshelves$Volumes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Volumes>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Volumes>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Volumes>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Volumes>,
       callback?: BodyResponseCallback<Schema$Volumes>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Volumes>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Volumes>,
       callback?: BodyResponseCallback<Schema$Volumes>):
       void|AxiosPromise<Schema$Volumes> {
     if (typeof options === 'function') {
@@ -2924,12 +2933,12 @@ export class Resource$Mylibrary$Readingpositions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$ReadingPosition>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ReadingPosition>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ReadingPosition>,
       callback?: BodyResponseCallback<Schema$ReadingPosition>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ReadingPosition>,
       callback?: BodyResponseCallback<Schema$ReadingPosition>):
       void|AxiosPromise<Schema$ReadingPosition> {
@@ -2982,12 +2991,12 @@ export class Resource$Mylibrary$Readingpositions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setPosition(params: any, options?: MethodOptions): AxiosPromise<void>;
+  setPosition(params?: any, options?: MethodOptions): AxiosPromise<void>;
   setPosition(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   setPosition(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -3048,11 +3057,11 @@ export class Resource$Notification {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Notification>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Notification>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Notification>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Notification>,
       callback?: BodyResponseCallback<Schema$Notification>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Notification>,
       callback?: BodyResponseCallback<Schema$Notification>):
       void|AxiosPromise<Schema$Notification> {
@@ -3111,13 +3120,14 @@ export class Resource$Onboarding {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listCategories(params: any, options?: MethodOptions):
+  listCategories(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Category>;
   listCategories(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Category>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Category>,
       callback?: BodyResponseCallback<Schema$Category>): void;
   listCategories(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Category>,
       callback?: BodyResponseCallback<Schema$Category>):
       void|AxiosPromise<Schema$Category> {
@@ -3168,13 +3178,15 @@ export class Resource$Onboarding {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listCategoryVolumes(params: any, options?: MethodOptions):
+  listCategoryVolumes(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Volume2>;
   listCategoryVolumes(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Volume2>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Volume2>,
       callback?: BodyResponseCallback<Schema$Volume2>): void;
   listCategoryVolumes(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Volume2>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Volume2>,
       callback?: BodyResponseCallback<Schema$Volume2>):
       void|AxiosPromise<Schema$Volume2> {
     if (typeof options === 'function') {
@@ -3234,12 +3246,12 @@ export class Resource$Personalizedstream {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$Discoveryclusters>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Discoveryclusters>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Discoveryclusters>,
       callback?: BodyResponseCallback<Schema$Discoveryclusters>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Discoveryclusters>,
       callback?: BodyResponseCallback<Schema$Discoveryclusters>):
       void|AxiosPromise<Schema$Discoveryclusters> {
@@ -3304,12 +3316,12 @@ export class Resource$Promooffer {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  accept(params: any, options?: MethodOptions): AxiosPromise<void>;
+  accept(params?: any, options?: MethodOptions): AxiosPromise<void>;
   accept(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   accept(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -3359,12 +3371,12 @@ export class Resource$Promooffer {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  dismiss(params: any, options?: MethodOptions): AxiosPromise<void>;
+  dismiss(params?: any, options?: MethodOptions): AxiosPromise<void>;
   dismiss(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   dismiss(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -3414,10 +3426,10 @@ export class Resource$Promooffer {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Offers>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Offers>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Offers>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Offers>,
       callback?: BodyResponseCallback<Schema$Offers>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Offers>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Offers>,
       callback?: BodyResponseCallback<Schema$Offers>):
       void|AxiosPromise<Schema$Offers> {
     if (typeof options === 'function') {
@@ -3477,10 +3489,10 @@ export class Resource$Series {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Series>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Series>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Series>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Series>,
       callback?: BodyResponseCallback<Schema$Series>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Series>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Series>,
       callback?: BodyResponseCallback<Schema$Series>):
       void|AxiosPromise<Schema$Series> {
     if (typeof options === 'function') {
@@ -3539,12 +3551,12 @@ export class Resource$Series$Membership {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$Seriesmembership>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Seriesmembership>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Seriesmembership>,
       callback?: BodyResponseCallback<Schema$Seriesmembership>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Seriesmembership>,
       callback?: BodyResponseCallback<Schema$Seriesmembership>):
       void|AxiosPromise<Schema$Seriesmembership> {
@@ -3618,10 +3630,10 @@ export class Resource$Volumes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Volume>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Volume>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Volume>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Volume>,
       callback?: BodyResponseCallback<Schema$Volume>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Volume>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Volume>,
       callback?: BodyResponseCallback<Schema$Volume>):
       void|AxiosPromise<Schema$Volume> {
     if (typeof options === 'function') {
@@ -3680,12 +3692,14 @@ export class Resource$Volumes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Volumes>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Volumes>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Volumes>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Volumes>,
       callback?: BodyResponseCallback<Schema$Volumes>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Volumes>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Volumes>,
       callback?: BodyResponseCallback<Schema$Volumes>):
       void|AxiosPromise<Schema$Volumes> {
     if (typeof options === 'function') {
@@ -3745,12 +3759,14 @@ export class Resource$Volumes$Associated {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Volumes>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Volumes>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Volumes>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Volumes>,
       callback?: BodyResponseCallback<Schema$Volumes>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Volumes>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Volumes>,
       callback?: BodyResponseCallback<Schema$Volumes>):
       void|AxiosPromise<Schema$Volumes> {
     if (typeof options === 'function') {
@@ -3814,12 +3830,14 @@ export class Resource$Volumes$Mybooks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Volumes>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Volumes>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Volumes>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Volumes>,
       callback?: BodyResponseCallback<Schema$Volumes>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Volumes>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Volumes>,
       callback?: BodyResponseCallback<Schema$Volumes>):
       void|AxiosPromise<Schema$Volumes> {
     if (typeof options === 'function') {
@@ -3879,12 +3897,14 @@ export class Resource$Volumes$Recommended {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Volumes>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Volumes>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Volumes>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Volumes>,
       callback?: BodyResponseCallback<Schema$Volumes>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Volumes>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Volumes>,
       callback?: BodyResponseCallback<Schema$Volumes>):
       void|AxiosPromise<Schema$Volumes> {
     if (typeof options === 'function') {
@@ -3933,17 +3953,17 @@ export class Resource$Volumes$Recommended {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  rate(params: any, options?: MethodOptions):
+  rate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BooksVolumesRecommendedRateResponse>;
   rate(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$BooksVolumesRecommendedRateResponse>,
       callback?:
           BodyResponseCallback<Schema$BooksVolumesRecommendedRateResponse>):
       void;
   rate(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$BooksVolumesRecommendedRateResponse>,
       callback?:
@@ -4011,12 +4031,14 @@ export class Resource$Volumes$Useruploaded {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Volumes>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Volumes>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Volumes>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Volumes>,
       callback?: BodyResponseCallback<Schema$Volumes>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Volumes>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Volumes>,
       callback?: BodyResponseCallback<Schema$Volumes>):
       void|AxiosPromise<Schema$Volumes> {
     if (typeof options === 'function') {
diff --git a/src/apis/calendar/v3.ts b/src/apis/calendar/v3.ts
index 7c3d9d49e3..f7aa0f3fed 100644
--- a/src/apis/calendar/v3.ts
+++ b/src/apis/calendar/v3.ts
@@ -1156,12 +1156,12 @@ export class Resource$Acl {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1207,10 +1207,12 @@ export class Resource$Acl {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$AclRule>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$AclRule>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$AclRule>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AclRule>,
       callback?: BodyResponseCallback<Schema$AclRule>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$AclRule>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AclRule>,
       callback?: BodyResponseCallback<Schema$AclRule>):
       void|AxiosPromise<Schema$AclRule> {
     if (typeof options === 'function') {
@@ -1258,12 +1260,14 @@ export class Resource$Acl {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$AclRule>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$AclRule>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$AclRule>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AclRule>,
       callback?: BodyResponseCallback<Schema$AclRule>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$AclRule>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AclRule>,
       callback?: BodyResponseCallback<Schema$AclRule>):
       void|AxiosPromise<Schema$AclRule> {
     if (typeof options === 'function') {
@@ -1313,12 +1317,12 @@ export class Resource$Acl {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Acl>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Acl>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Acl>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Acl>,
       callback?: BodyResponseCallback<Schema$Acl>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Acl>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Acl>,
       callback?: BodyResponseCallback<Schema$Acl>):
       void|AxiosPromise<Schema$Acl> {
     if (typeof options === 'function') {
@@ -1367,12 +1371,14 @@ export class Resource$Acl {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$AclRule>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$AclRule>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$AclRule>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AclRule>,
       callback?: BodyResponseCallback<Schema$AclRule>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$AclRule>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AclRule>,
       callback?: BodyResponseCallback<Schema$AclRule>):
       void|AxiosPromise<Schema$AclRule> {
     if (typeof options === 'function') {
@@ -1421,12 +1427,14 @@ export class Resource$Acl {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$AclRule>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$AclRule>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$AclRule>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AclRule>,
       callback?: BodyResponseCallback<Schema$AclRule>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$AclRule>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AclRule>,
       callback?: BodyResponseCallback<Schema$AclRule>):
       void|AxiosPromise<Schema$AclRule> {
     if (typeof options === 'function') {
@@ -1477,12 +1485,14 @@ export class Resource$Acl {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  watch(params: any, options?: MethodOptions): AxiosPromise<Schema$Channel>;
+  watch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Channel>;
   watch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Channel>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
       callback?: BodyResponseCallback<Schema$Channel>): void;
   watch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
       callback?: BodyResponseCallback<Schema$Channel>):
       void|AxiosPromise<Schema$Channel> {
     if (typeof options === 'function') {
@@ -1540,12 +1550,12 @@ export class Resource$Calendarlist {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1590,12 +1600,12 @@ export class Resource$Calendarlist {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$CalendarListEntry>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CalendarListEntry>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CalendarListEntry>,
       callback?: BodyResponseCallback<Schema$CalendarListEntry>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CalendarListEntry>,
       callback?: BodyResponseCallback<Schema$CalendarListEntry>):
       void|AxiosPromise<Schema$CalendarListEntry> {
@@ -1643,14 +1653,14 @@ export class Resource$Calendarlist {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CalendarListEntry>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CalendarListEntry>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CalendarListEntry>,
       callback?: BodyResponseCallback<Schema$CalendarListEntry>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CalendarListEntry>,
       callback?: BodyResponseCallback<Schema$CalendarListEntry>):
       void|AxiosPromise<Schema$CalendarListEntry> {
@@ -1702,13 +1712,14 @@ export class Resource$Calendarlist {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$CalendarList>;
+  list(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$CalendarList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CalendarList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CalendarList>,
       callback?: BodyResponseCallback<Schema$CalendarList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CalendarList>,
       callback?: BodyResponseCallback<Schema$CalendarList>):
       void|AxiosPromise<Schema$CalendarList> {
@@ -1758,14 +1769,14 @@ export class Resource$Calendarlist {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CalendarListEntry>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CalendarListEntry>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CalendarListEntry>,
       callback?: BodyResponseCallback<Schema$CalendarListEntry>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CalendarListEntry>,
       callback?: BodyResponseCallback<Schema$CalendarListEntry>):
       void|AxiosPromise<Schema$CalendarListEntry> {
@@ -1814,14 +1825,14 @@ export class Resource$Calendarlist {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CalendarListEntry>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CalendarListEntry>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CalendarListEntry>,
       callback?: BodyResponseCallback<Schema$CalendarListEntry>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CalendarListEntry>,
       callback?: BodyResponseCallback<Schema$CalendarListEntry>):
       void|AxiosPromise<Schema$CalendarListEntry> {
@@ -1874,12 +1885,14 @@ export class Resource$Calendarlist {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  watch(params: any, options?: MethodOptions): AxiosPromise<Schema$Channel>;
+  watch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Channel>;
   watch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Channel>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
       callback?: BodyResponseCallback<Schema$Channel>): void;
   watch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
       callback?: BodyResponseCallback<Schema$Channel>):
       void|AxiosPromise<Schema$Channel> {
     if (typeof options === 'function') {
@@ -1938,12 +1951,12 @@ export class Resource$Calendars {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  clear(params: any, options?: MethodOptions): AxiosPromise<void>;
+  clear(params?: any, options?: MethodOptions): AxiosPromise<void>;
   clear(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   clear(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1989,12 +2002,12 @@ export class Resource$Calendars {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2039,10 +2052,11 @@ export class Resource$Calendars {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Calendar>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Calendar>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Calendar>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Calendar>,
       callback?: BodyResponseCallback<Schema$Calendar>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Calendar>,
       callback?: BodyResponseCallback<Schema$Calendar>):
       void|AxiosPromise<Schema$Calendar> {
@@ -2089,12 +2103,13 @@ export class Resource$Calendars {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Calendar>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Calendar>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Calendar>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Calendar>,
       callback?: BodyResponseCallback<Schema$Calendar>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Calendar>,
       callback?: BodyResponseCallback<Schema$Calendar>):
       void|AxiosPromise<Schema$Calendar> {
@@ -2143,12 +2158,13 @@ export class Resource$Calendars {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Calendar>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Calendar>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Calendar>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Calendar>,
       callback?: BodyResponseCallback<Schema$Calendar>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Calendar>,
       callback?: BodyResponseCallback<Schema$Calendar>):
       void|AxiosPromise<Schema$Calendar> {
@@ -2196,12 +2212,13 @@ export class Resource$Calendars {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Calendar>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Calendar>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Calendar>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Calendar>,
       callback?: BodyResponseCallback<Schema$Calendar>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Calendar>,
       callback?: BodyResponseCallback<Schema$Calendar>):
       void|AxiosPromise<Schema$Calendar> {
@@ -2260,12 +2277,12 @@ export class Resource$Channels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  stop(params: any, options?: MethodOptions): AxiosPromise<void>;
+  stop(params?: any, options?: MethodOptions): AxiosPromise<void>;
   stop(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   stop(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2321,10 +2338,10 @@ export class Resource$Colors {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Colors>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Colors>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Colors>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Colors>,
       callback?: BodyResponseCallback<Schema$Colors>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Colors>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Colors>,
       callback?: BodyResponseCallback<Schema$Colors>):
       void|AxiosPromise<Schema$Colors> {
     if (typeof options === 'function') {
@@ -2384,12 +2401,12 @@ export class Resource$Events {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2439,10 +2456,10 @@ export class Resource$Events {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Event>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Event>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Event>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Event>,
       callback?: BodyResponseCallback<Schema$Event>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Event>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Event>,
       callback?: BodyResponseCallback<Schema$Event>):
       void|AxiosPromise<Schema$Event> {
     if (typeof options === 'function') {
@@ -2493,9 +2510,9 @@ export class Resource$Events {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-import(params: any, options?: MethodOptions): AxiosPromise<Schema$Event>;
-import(params: any, options: MethodOptions|BodyResponseCallback<Schema$Event>, callback?: BodyResponseCallback<Schema$Event>): void;
-import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Event>, callback?: BodyResponseCallback<Schema$Event>): void|AxiosPromise<Schema$Event> {if(typeof options === 'function') {
+import(params?: any, options?: MethodOptions): AxiosPromise<Schema$Event>;
+import(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Event>, callback?: BodyResponseCallback<Schema$Event>): void;
+import(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Event>, callback?: BodyResponseCallback<Schema$Event>): void|AxiosPromise<Schema$Event> {if(typeof options === 'function') {
     callback = options;
     options = {};
   } if(typeof params === 'function') {
@@ -2524,12 +2541,12 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Event>,
  * @param {callback} callback The callback that handles the response.
  * @return {object} Request object
  */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Event>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Event>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Event>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Event>,
       callback?: BodyResponseCallback<Schema$Event>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Event>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Event>,
       callback?: BodyResponseCallback<Schema$Event>):
       void|AxiosPromise<Schema$Event> {
     if (typeof options === 'function') {
@@ -2585,12 +2602,12 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Event>,
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  instances(params: any, options?: MethodOptions): AxiosPromise<Schema$Events>;
+  instances(params?: any, options?: MethodOptions): AxiosPromise<Schema$Events>;
   instances(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Events>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Events>,
       callback?: BodyResponseCallback<Schema$Events>): void;
   instances(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Events>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Events>,
       callback?: BodyResponseCallback<Schema$Events>):
       void|AxiosPromise<Schema$Events> {
     if (typeof options === 'function') {
@@ -2655,12 +2672,12 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Event>,
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Events>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Events>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Events>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Events>,
       callback?: BodyResponseCallback<Schema$Events>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Events>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Events>,
       callback?: BodyResponseCallback<Schema$Events>):
       void|AxiosPromise<Schema$Events> {
     if (typeof options === 'function') {
@@ -2710,12 +2727,12 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Event>,
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  move(params: any, options?: MethodOptions): AxiosPromise<Schema$Event>;
+  move(params?: any, options?: MethodOptions): AxiosPromise<Schema$Event>;
   move(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Event>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Event>,
       callback?: BodyResponseCallback<Schema$Event>): void;
   move(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Event>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Event>,
       callback?: BodyResponseCallback<Schema$Event>):
       void|AxiosPromise<Schema$Event> {
     if (typeof options === 'function') {
@@ -2769,12 +2786,12 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Event>,
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Event>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Event>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Event>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Event>,
       callback?: BodyResponseCallback<Schema$Event>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Event>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Event>,
       callback?: BodyResponseCallback<Schema$Event>):
       void|AxiosPromise<Schema$Event> {
     if (typeof options === 'function') {
@@ -2823,12 +2840,12 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Event>,
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  quickAdd(params: any, options?: MethodOptions): AxiosPromise<Schema$Event>;
+  quickAdd(params?: any, options?: MethodOptions): AxiosPromise<Schema$Event>;
   quickAdd(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Event>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Event>,
       callback?: BodyResponseCallback<Schema$Event>): void;
   quickAdd(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Event>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Event>,
       callback?: BodyResponseCallback<Schema$Event>):
       void|AxiosPromise<Schema$Event> {
     if (typeof options === 'function') {
@@ -2882,12 +2899,12 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Event>,
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Event>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Event>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Event>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Event>,
       callback?: BodyResponseCallback<Schema$Event>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Event>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Event>,
       callback?: BodyResponseCallback<Schema$Event>):
       void|AxiosPromise<Schema$Event> {
     if (typeof options === 'function') {
@@ -2952,12 +2969,14 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Event>,
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  watch(params: any, options?: MethodOptions): AxiosPromise<Schema$Channel>;
+  watch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Channel>;
   watch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Channel>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
       callback?: BodyResponseCallback<Schema$Channel>): void;
   watch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
       callback?: BodyResponseCallback<Schema$Channel>):
       void|AxiosPromise<Schema$Channel> {
     if (typeof options === 'function') {
@@ -3015,14 +3034,14 @@ export class Resource$Freebusy {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  query(params: any, options?: MethodOptions):
+  query(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FreeBusyResponse>;
   query(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$FreeBusyResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$FreeBusyResponse>,
       callback?: BodyResponseCallback<Schema$FreeBusyResponse>): void;
   query(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$FreeBusyResponse>,
       callback?: BodyResponseCallback<Schema$FreeBusyResponse>):
       void|AxiosPromise<Schema$FreeBusyResponse> {
@@ -3081,10 +3100,12 @@ export class Resource$Settings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Setting>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Setting>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Setting>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Setting>,
       callback?: BodyResponseCallback<Schema$Setting>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Setting>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Setting>,
       callback?: BodyResponseCallback<Schema$Setting>):
       void|AxiosPromise<Schema$Setting> {
     if (typeof options === 'function') {
@@ -3132,12 +3153,13 @@ export class Resource$Settings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Settings>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Settings>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Settings>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Settings>,
       callback?: BodyResponseCallback<Schema$Settings>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Settings>,
       callback?: BodyResponseCallback<Schema$Settings>):
       void|AxiosPromise<Schema$Settings> {
@@ -3187,12 +3209,14 @@ export class Resource$Settings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  watch(params: any, options?: MethodOptions): AxiosPromise<Schema$Channel>;
+  watch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Channel>;
   watch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Channel>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
       callback?: BodyResponseCallback<Schema$Channel>): void;
   watch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
       callback?: BodyResponseCallback<Schema$Channel>):
       void|AxiosPromise<Schema$Channel> {
     if (typeof options === 'function') {
diff --git a/src/apis/chat/v1.ts b/src/apis/chat/v1.ts
index ce241d916d..b8453e17c1 100644
--- a/src/apis/chat/v1.ts
+++ b/src/apis/chat/v1.ts
@@ -31,7 +31,8 @@ import {createAPIRequest} from '../../lib/apirequest';
 /**
  * Hangouts Chat API
  *
- * Create bots and extend the new Hangouts Chat.
+ * Enables bots to fetch information and perform actions in the new Hangouts
+ * Chat.
  *
  * @example
  * const google = require('googleapis');
@@ -48,8 +49,6 @@ export class Chat {
   google: GoogleApis;
   root = this;
 
-  dms: Resource$Dms;
-  rooms: Resource$Rooms;
   spaces: Resource$Spaces;
 
   constructor(options: GlobalOptions, google: GoogleApis) {
@@ -57,8 +56,6 @@ export class Chat {
     this.google = google;
     this.getRoot.bind(this);
 
-    this.dms = new Resource$Dms(this);
-    this.rooms = new Resource$Rooms(this);
     this.spaces = new Resource$Spaces(this);
   }
 
@@ -539,326 +536,6 @@ export interface Schema$WidgetMarkup {
   textParagraph: Schema$TextParagraph;
 }
 
-export class Resource$Dms {
-  root: Chat;
-  conversations: Resource$Dms$Conversations;
-  messages: Resource$Dms$Messages;
-  constructor(root: Chat) {
-    this.root = root;
-    this.getRoot.bind(this);
-    this.conversations = new Resource$Dms$Conversations(root);
-    this.messages = new Resource$Dms$Messages(root);
-  }
-
-  getRoot() {
-    return this.root;
-  }
-}
-export class Resource$Dms$Conversations {
-  root: Chat;
-  messages: Resource$Dms$Conversations$Messages;
-  constructor(root: Chat) {
-    this.root = root;
-    this.getRoot.bind(this);
-    this.messages = new Resource$Dms$Conversations$Messages(root);
-  }
-
-  getRoot() {
-    return this.root;
-  }
-}
-export class Resource$Dms$Conversations$Messages {
-  root: Chat;
-  constructor(root: Chat) {
-    this.root = root;
-    this.getRoot.bind(this);
-  }
-
-  getRoot() {
-    return this.root;
-  }
-
-
-  /**
-   * chat.dms.conversations.messages.create
-   * @desc Creates a message.
-   * @alias chat.dms.conversations.messages.create
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.parent Required. Space resource name, in the form "spaces/x". Example: spaces/AAAAMpdlehY
-   * @param {string=} params.threadKey Opaque thread identifier string that can be specified to group messages into a single thread. If this is the first message with a given thread identifier, a new thread is created. Subsequent messages with the same thread identifier will be posted into the same thread. This relieves bots and webhooks from having to store the Hangouts Chat thread ID of a thread (created earlier by them) to post further updates to it.  Has no effect if thread field, corresponding to an existing thread, is set in message.
-   * @param {().Message} params.resource Request body data
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Message>;
-  create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Message>,
-      callback?: BodyResponseCallback<Schema$Message>): void;
-  create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Message>,
-      callback?: BodyResponseCallback<Schema$Message>):
-      void|AxiosPromise<Schema$Message> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://chat.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url: (rootUrl + '/v1/{parent}/messages')
-                     .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'POST'
-          },
-          options),
-      params,
-      requiredParams: ['parent'],
-      pathParams: ['parent'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$Message>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$Message>(parameters);
-    }
-  }
-}
-
-
-export class Resource$Dms$Messages {
-  root: Chat;
-  constructor(root: Chat) {
-    this.root = root;
-    this.getRoot.bind(this);
-  }
-
-  getRoot() {
-    return this.root;
-  }
-
-
-  /**
-   * chat.dms.messages.create
-   * @desc Creates a message.
-   * @alias chat.dms.messages.create
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.parent Required. Space resource name, in the form "spaces/x". Example: spaces/AAAAMpdlehY
-   * @param {string=} params.threadKey Opaque thread identifier string that can be specified to group messages into a single thread. If this is the first message with a given thread identifier, a new thread is created. Subsequent messages with the same thread identifier will be posted into the same thread. This relieves bots and webhooks from having to store the Hangouts Chat thread ID of a thread (created earlier by them) to post further updates to it.  Has no effect if thread field, corresponding to an existing thread, is set in message.
-   * @param {().Message} params.resource Request body data
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Message>;
-  create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Message>,
-      callback?: BodyResponseCallback<Schema$Message>): void;
-  create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Message>,
-      callback?: BodyResponseCallback<Schema$Message>):
-      void|AxiosPromise<Schema$Message> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://chat.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url: (rootUrl + '/v1/{parent}/messages')
-                     .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'POST'
-          },
-          options),
-      params,
-      requiredParams: ['parent'],
-      pathParams: ['parent'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$Message>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$Message>(parameters);
-    }
-  }
-}
-
-
-export class Resource$Rooms {
-  root: Chat;
-  conversations: Resource$Rooms$Conversations;
-  messages: Resource$Rooms$Messages;
-  constructor(root: Chat) {
-    this.root = root;
-    this.getRoot.bind(this);
-    this.conversations = new Resource$Rooms$Conversations(root);
-    this.messages = new Resource$Rooms$Messages(root);
-  }
-
-  getRoot() {
-    return this.root;
-  }
-}
-export class Resource$Rooms$Conversations {
-  root: Chat;
-  messages: Resource$Rooms$Conversations$Messages;
-  constructor(root: Chat) {
-    this.root = root;
-    this.getRoot.bind(this);
-    this.messages = new Resource$Rooms$Conversations$Messages(root);
-  }
-
-  getRoot() {
-    return this.root;
-  }
-}
-export class Resource$Rooms$Conversations$Messages {
-  root: Chat;
-  constructor(root: Chat) {
-    this.root = root;
-    this.getRoot.bind(this);
-  }
-
-  getRoot() {
-    return this.root;
-  }
-
-
-  /**
-   * chat.rooms.conversations.messages.create
-   * @desc Creates a message.
-   * @alias chat.rooms.conversations.messages.create
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.parent Required. Space resource name, in the form "spaces/x". Example: spaces/AAAAMpdlehY
-   * @param {string=} params.threadKey Opaque thread identifier string that can be specified to group messages into a single thread. If this is the first message with a given thread identifier, a new thread is created. Subsequent messages with the same thread identifier will be posted into the same thread. This relieves bots and webhooks from having to store the Hangouts Chat thread ID of a thread (created earlier by them) to post further updates to it.  Has no effect if thread field, corresponding to an existing thread, is set in message.
-   * @param {().Message} params.resource Request body data
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Message>;
-  create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Message>,
-      callback?: BodyResponseCallback<Schema$Message>): void;
-  create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Message>,
-      callback?: BodyResponseCallback<Schema$Message>):
-      void|AxiosPromise<Schema$Message> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://chat.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url: (rootUrl + '/v1/{parent}/messages')
-                     .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'POST'
-          },
-          options),
-      params,
-      requiredParams: ['parent'],
-      pathParams: ['parent'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$Message>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$Message>(parameters);
-    }
-  }
-}
-
-
-export class Resource$Rooms$Messages {
-  root: Chat;
-  constructor(root: Chat) {
-    this.root = root;
-    this.getRoot.bind(this);
-  }
-
-  getRoot() {
-    return this.root;
-  }
-
-
-  /**
-   * chat.rooms.messages.create
-   * @desc Creates a message.
-   * @alias chat.rooms.messages.create
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.parent Required. Space resource name, in the form "spaces/x". Example: spaces/AAAAMpdlehY
-   * @param {string=} params.threadKey Opaque thread identifier string that can be specified to group messages into a single thread. If this is the first message with a given thread identifier, a new thread is created. Subsequent messages with the same thread identifier will be posted into the same thread. This relieves bots and webhooks from having to store the Hangouts Chat thread ID of a thread (created earlier by them) to post further updates to it.  Has no effect if thread field, corresponding to an existing thread, is set in message.
-   * @param {().Message} params.resource Request body data
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Message>;
-  create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Message>,
-      callback?: BodyResponseCallback<Schema$Message>): void;
-  create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Message>,
-      callback?: BodyResponseCallback<Schema$Message>):
-      void|AxiosPromise<Schema$Message> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://chat.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url: (rootUrl + '/v1/{parent}/messages')
-                     .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'POST'
-          },
-          options),
-      params,
-      requiredParams: ['parent'],
-      pathParams: ['parent'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$Message>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$Message>(parameters);
-    }
-  }
-}
-
-
 export class Resource$Spaces {
   root: Chat;
   members: Resource$Spaces$Members;
@@ -887,10 +564,10 @@ export class Resource$Spaces {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Space>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Space>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Space>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Space>,
       callback?: BodyResponseCallback<Schema$Space>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Space>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Space>,
       callback?: BodyResponseCallback<Schema$Space>):
       void|AxiosPromise<Schema$Space> {
     if (typeof options === 'function') {
@@ -936,14 +613,14 @@ export class Resource$Spaces {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListSpacesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListSpacesResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListSpacesResponse>,
       callback?: BodyResponseCallback<Schema$ListSpacesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListSpacesResponse>,
       callback?: BodyResponseCallback<Schema$ListSpacesResponse>):
       void|AxiosPromise<Schema$ListSpacesResponse> {
@@ -1000,11 +677,11 @@ export class Resource$Spaces$Members {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Membership>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Membership>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Membership>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Membership>,
       callback?: BodyResponseCallback<Schema$Membership>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Membership>,
       callback?: BodyResponseCallback<Schema$Membership>):
       void|AxiosPromise<Schema$Membership> {
@@ -1052,15 +729,15 @@ export class Resource$Spaces$Members {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListMembershipsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListMembershipsResponse>,
       callback?: BodyResponseCallback<Schema$ListMembershipsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListMembershipsResponse>,
       callback?: BodyResponseCallback<Schema$ListMembershipsResponse>):
@@ -1122,12 +799,14 @@ export class Resource$Spaces$Messages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Message>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Message>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Message>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Message>,
       callback?: BodyResponseCallback<Schema$Message>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Message>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Message>,
       callback?: BodyResponseCallback<Schema$Message>):
       void|AxiosPromise<Schema$Message> {
     if (typeof options === 'function') {
@@ -1173,12 +852,12 @@ export class Resource$Spaces$Messages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1223,10 +902,12 @@ export class Resource$Spaces$Messages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Message>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Message>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Message>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Message>,
       callback?: BodyResponseCallback<Schema$Message>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Message>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Message>,
       callback?: BodyResponseCallback<Schema$Message>):
       void|AxiosPromise<Schema$Message> {
     if (typeof options === 'function') {
@@ -1273,12 +954,14 @@ export class Resource$Spaces$Messages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Message>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Message>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Message>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Message>,
       callback?: BodyResponseCallback<Schema$Message>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Message>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Message>,
       callback?: BodyResponseCallback<Schema$Message>):
       void|AxiosPromise<Schema$Message> {
     if (typeof options === 'function') {
diff --git a/src/apis/civicinfo/v2.ts b/src/apis/civicinfo/v2.ts
index ed681c18c5..571052e971 100644
--- a/src/apis/civicinfo/v2.ts
+++ b/src/apis/civicinfo/v2.ts
@@ -858,15 +858,15 @@ export class Resource$Divisions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  search(params: any, options?: MethodOptions):
+  search(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DivisionSearchResponse>;
   search(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$DivisionSearchResponse>,
       callback?: BodyResponseCallback<Schema$DivisionSearchResponse>): void;
   search(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$DivisionSearchResponse>,
       callback?: BodyResponseCallback<Schema$DivisionSearchResponse>):
@@ -926,15 +926,15 @@ export class Resource$Elections {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  electionQuery(params: any, options?: MethodOptions):
+  electionQuery(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ElectionsQueryResponse>;
   electionQuery(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ElectionsQueryResponse>,
       callback?: BodyResponseCallback<Schema$ElectionsQueryResponse>): void;
   electionQuery(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ElectionsQueryResponse>,
       callback?: BodyResponseCallback<Schema$ElectionsQueryResponse>):
@@ -987,14 +987,14 @@ export class Resource$Elections {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  voterInfoQuery(params: any, options?: MethodOptions):
+  voterInfoQuery(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$VoterInfoResponse>;
   voterInfoQuery(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$VoterInfoResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$VoterInfoResponse>,
       callback?: BodyResponseCallback<Schema$VoterInfoResponse>): void;
   voterInfoQuery(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$VoterInfoResponse>,
       callback?: BodyResponseCallback<Schema$VoterInfoResponse>):
       void|AxiosPromise<Schema$VoterInfoResponse> {
@@ -1058,15 +1058,15 @@ export class Resource$Representatives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  representativeInfoByAddress(params: any, options?: MethodOptions):
+  representativeInfoByAddress(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RepresentativeInfoResponse>;
   representativeInfoByAddress(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$RepresentativeInfoResponse>,
       callback?: BodyResponseCallback<Schema$RepresentativeInfoResponse>): void;
   representativeInfoByAddress(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$RepresentativeInfoResponse>,
       callback?: BodyResponseCallback<Schema$RepresentativeInfoResponse>):
@@ -1118,15 +1118,15 @@ export class Resource$Representatives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  representativeInfoByDivision(params: any, options?: MethodOptions):
+  representativeInfoByDivision(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RepresentativeInfoData>;
   representativeInfoByDivision(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$RepresentativeInfoData>,
       callback?: BodyResponseCallback<Schema$RepresentativeInfoData>): void;
   representativeInfoByDivision(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$RepresentativeInfoData>,
       callback?: BodyResponseCallback<Schema$RepresentativeInfoData>):
diff --git a/src/apis/classroom/v1.ts b/src/apis/classroom/v1.ts
index 28cbeae3d9..97e9ef4c34 100644
--- a/src/apis/classroom/v1.ts
+++ b/src/apis/classroom/v1.ts
@@ -1360,12 +1360,12 @@ export class Resource$Courses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Course>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Course>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Course>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Course>,
       callback?: BodyResponseCallback<Schema$Course>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Course>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Course>,
       callback?: BodyResponseCallback<Schema$Course>):
       void|AxiosPromise<Schema$Course> {
     if (typeof options === 'function') {
@@ -1413,12 +1413,12 @@ export class Resource$Courses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1466,10 +1466,10 @@ export class Resource$Courses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Course>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Course>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Course>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Course>,
       callback?: BodyResponseCallback<Schema$Course>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Course>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Course>,
       callback?: BodyResponseCallback<Schema$Course>):
       void|AxiosPromise<Schema$Course> {
     if (typeof options === 'function') {
@@ -1523,14 +1523,14 @@ export class Resource$Courses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListCoursesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListCoursesResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListCoursesResponse>,
       callback?: BodyResponseCallback<Schema$ListCoursesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListCoursesResponse>,
       callback?: BodyResponseCallback<Schema$ListCoursesResponse>):
       void|AxiosPromise<Schema$ListCoursesResponse> {
@@ -1584,12 +1584,12 @@ export class Resource$Courses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Course>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Course>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Course>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Course>,
       callback?: BodyResponseCallback<Schema$Course>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Course>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Course>,
       callback?: BodyResponseCallback<Schema$Course>):
       void|AxiosPromise<Schema$Course> {
     if (typeof options === 'function') {
@@ -1639,12 +1639,12 @@ export class Resource$Courses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Course>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Course>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Course>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Course>,
       callback?: BodyResponseCallback<Schema$Course>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Course>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Course>,
       callback?: BodyResponseCallback<Schema$Course>):
       void|AxiosPromise<Schema$Course> {
     if (typeof options === 'function') {
@@ -1707,14 +1707,14 @@ export class Resource$Courses$Aliases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CourseAlias>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CourseAlias>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CourseAlias>,
       callback?: BodyResponseCallback<Schema$CourseAlias>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CourseAlias>,
       callback?: BodyResponseCallback<Schema$CourseAlias>):
       void|AxiosPromise<Schema$CourseAlias> {
@@ -1767,12 +1767,12 @@ export class Resource$Courses$Aliases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1823,15 +1823,15 @@ export class Resource$Courses$Aliases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListCourseAliasesResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListCourseAliasesResponse>,
       callback?: BodyResponseCallback<Schema$ListCourseAliasesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListCourseAliasesResponse>,
       callback?: BodyResponseCallback<Schema$ListCourseAliasesResponse>):
@@ -1898,14 +1898,14 @@ export class Resource$Courses$Announcements {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Announcement>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Announcement>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Announcement>,
       callback?: BodyResponseCallback<Schema$Announcement>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Announcement>,
       callback?: BodyResponseCallback<Schema$Announcement>):
       void|AxiosPromise<Schema$Announcement> {
@@ -1961,12 +1961,12 @@ export class Resource$Courses$Announcements {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2017,11 +2017,11 @@ export class Resource$Courses$Announcements {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Announcement>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Announcement>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Announcement>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Announcement>,
       callback?: BodyResponseCallback<Schema$Announcement>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Announcement>,
       callback?: BodyResponseCallback<Schema$Announcement>):
       void|AxiosPromise<Schema$Announcement> {
@@ -2078,15 +2078,15 @@ export class Resource$Courses$Announcements {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListAnnouncementsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListAnnouncementsResponse>,
       callback?: BodyResponseCallback<Schema$ListAnnouncementsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListAnnouncementsResponse>,
       callback?: BodyResponseCallback<Schema$ListAnnouncementsResponse>):
@@ -2142,14 +2142,14 @@ export class Resource$Courses$Announcements {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  modifyAssignees(params: any, options?: MethodOptions):
+  modifyAssignees(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Announcement>;
   modifyAssignees(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Announcement>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Announcement>,
       callback?: BodyResponseCallback<Schema$Announcement>): void;
   modifyAssignees(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Announcement>,
       callback?: BodyResponseCallback<Schema$Announcement>):
       void|AxiosPromise<Schema$Announcement> {
@@ -2206,14 +2206,14 @@ export class Resource$Courses$Announcements {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Announcement>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Announcement>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Announcement>,
       callback?: BodyResponseCallback<Schema$Announcement>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Announcement>,
       callback?: BodyResponseCallback<Schema$Announcement>):
       void|AxiosPromise<Schema$Announcement> {
@@ -2287,13 +2287,14 @@ export class Resource$Courses$Coursework {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$CourseWork>;
+  create(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$CourseWork>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CourseWork>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CourseWork>,
       callback?: BodyResponseCallback<Schema$CourseWork>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CourseWork>,
       callback?: BodyResponseCallback<Schema$CourseWork>):
       void|AxiosPromise<Schema$CourseWork> {
@@ -2349,12 +2350,12 @@ export class Resource$Courses$Coursework {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2405,11 +2406,11 @@ export class Resource$Courses$Coursework {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$CourseWork>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CourseWork>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$CourseWork>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CourseWork>,
       callback?: BodyResponseCallback<Schema$CourseWork>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CourseWork>,
       callback?: BodyResponseCallback<Schema$CourseWork>):
       void|AxiosPromise<Schema$CourseWork> {
@@ -2466,15 +2467,15 @@ export class Resource$Courses$Coursework {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListCourseWorkResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListCourseWorkResponse>,
       callback?: BodyResponseCallback<Schema$ListCourseWorkResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListCourseWorkResponse>,
       callback?: BodyResponseCallback<Schema$ListCourseWorkResponse>):
@@ -2530,14 +2531,14 @@ export class Resource$Courses$Coursework {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  modifyAssignees(params: any, options?: MethodOptions):
+  modifyAssignees(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CourseWork>;
   modifyAssignees(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CourseWork>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CourseWork>,
       callback?: BodyResponseCallback<Schema$CourseWork>): void;
   modifyAssignees(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CourseWork>,
       callback?: BodyResponseCallback<Schema$CourseWork>):
       void|AxiosPromise<Schema$CourseWork> {
@@ -2599,13 +2600,13 @@ export class Resource$Courses$Coursework {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$CourseWork>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$CourseWork>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CourseWork>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CourseWork>,
       callback?: BodyResponseCallback<Schema$CourseWork>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CourseWork>,
       callback?: BodyResponseCallback<Schema$CourseWork>):
       void|AxiosPromise<Schema$CourseWork> {
@@ -2669,12 +2670,12 @@ export class Resource$Courses$Coursework$Studentsubmissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$StudentSubmission>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$StudentSubmission>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$StudentSubmission>,
       callback?: BodyResponseCallback<Schema$StudentSubmission>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$StudentSubmission>,
       callback?: BodyResponseCallback<Schema$StudentSubmission>):
       void|AxiosPromise<Schema$StudentSubmission> {
@@ -2737,16 +2738,16 @@ export class Resource$Courses$Coursework$Studentsubmissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListStudentSubmissionsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListStudentSubmissionsResponse>,
       callback?: BodyResponseCallback<Schema$ListStudentSubmissionsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListStudentSubmissionsResponse>,
       callback?: BodyResponseCallback<Schema$ListStudentSubmissionsResponse>):
@@ -2811,14 +2812,14 @@ export class Resource$Courses$Coursework$Studentsubmissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  modifyAttachments(params: any, options?: MethodOptions):
+  modifyAttachments(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$StudentSubmission>;
   modifyAttachments(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$StudentSubmission>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$StudentSubmission>,
       callback?: BodyResponseCallback<Schema$StudentSubmission>): void;
   modifyAttachments(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$StudentSubmission>,
       callback?: BodyResponseCallback<Schema$StudentSubmission>):
       void|AxiosPromise<Schema$StudentSubmission> {
@@ -2881,14 +2882,14 @@ export class Resource$Courses$Coursework$Studentsubmissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$StudentSubmission>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$StudentSubmission>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$StudentSubmission>,
       callback?: BodyResponseCallback<Schema$StudentSubmission>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$StudentSubmission>,
       callback?: BodyResponseCallback<Schema$StudentSubmission>):
       void|AxiosPromise<Schema$StudentSubmission> {
@@ -2953,12 +2954,12 @@ export class Resource$Courses$Coursework$Studentsubmissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  reclaim(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  reclaim(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   reclaim(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   reclaim(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -3022,12 +3023,12 @@ export class Resource$Courses$Coursework$Studentsubmissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  return(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  return(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   return(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   return(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void|
       AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -3089,12 +3090,12 @@ export class Resource$Courses$Coursework$Studentsubmissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  turnIn(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  turnIn(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   turnIn(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   turnIn(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -3164,12 +3165,14 @@ export class Resource$Courses$Students {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Student>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Student>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Student>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Student>,
       callback?: BodyResponseCallback<Schema$Student>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Student>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Student>,
       callback?: BodyResponseCallback<Schema$Student>):
       void|AxiosPromise<Schema$Student> {
     if (typeof options === 'function') {
@@ -3220,12 +3223,12 @@ export class Resource$Courses$Students {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -3276,10 +3279,12 @@ export class Resource$Courses$Students {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Student>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Student>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Student>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Student>,
       callback?: BodyResponseCallback<Schema$Student>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Student>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Student>,
       callback?: BodyResponseCallback<Schema$Student>):
       void|AxiosPromise<Schema$Student> {
     if (typeof options === 'function') {
@@ -3330,14 +3335,14 @@ export class Resource$Courses$Students {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListStudentsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListStudentsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListStudentsResponse>,
       callback?: BodyResponseCallback<Schema$ListStudentsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListStudentsResponse>,
       callback?: BodyResponseCallback<Schema$ListStudentsResponse>):
       void|AxiosPromise<Schema$ListStudentsResponse> {
@@ -3405,12 +3410,14 @@ export class Resource$Courses$Teachers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Teacher>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Teacher>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Teacher>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Teacher>,
       callback?: BodyResponseCallback<Schema$Teacher>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Teacher>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Teacher>,
       callback?: BodyResponseCallback<Schema$Teacher>):
       void|AxiosPromise<Schema$Teacher> {
     if (typeof options === 'function') {
@@ -3462,12 +3469,12 @@ export class Resource$Courses$Teachers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -3518,10 +3525,12 @@ export class Resource$Courses$Teachers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Teacher>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Teacher>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Teacher>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Teacher>,
       callback?: BodyResponseCallback<Schema$Teacher>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Teacher>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Teacher>,
       callback?: BodyResponseCallback<Schema$Teacher>):
       void|AxiosPromise<Schema$Teacher> {
     if (typeof options === 'function') {
@@ -3572,14 +3581,14 @@ export class Resource$Courses$Teachers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListTeachersResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListTeachersResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListTeachersResponse>,
       callback?: BodyResponseCallback<Schema$ListTeachersResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListTeachersResponse>,
       callback?: BodyResponseCallback<Schema$ListTeachersResponse>):
       void|AxiosPromise<Schema$ListTeachersResponse> {
@@ -3643,10 +3652,10 @@ export class Resource$Courses$Topics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Topic>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Topic>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Topic>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Topic>,
       callback?: BodyResponseCallback<Schema$Topic>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Topic>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Topic>,
       callback?: BodyResponseCallback<Schema$Topic>):
       void|AxiosPromise<Schema$Topic> {
     if (typeof options === 'function') {
@@ -3698,14 +3707,14 @@ export class Resource$Courses$Topics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListTopicResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListTopicResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListTopicResponse>,
       callback?: BodyResponseCallback<Schema$ListTopicResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListTopicResponse>,
       callback?: BodyResponseCallback<Schema$ListTopicResponse>):
       void|AxiosPromise<Schema$ListTopicResponse> {
@@ -3773,12 +3782,12 @@ export class Resource$Invitations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  accept(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  accept(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   accept(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   accept(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -3832,13 +3841,14 @@ export class Resource$Invitations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Invitation>;
+  create(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Invitation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Invitation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Invitation>,
       callback?: BodyResponseCallback<Schema$Invitation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Invitation>,
       callback?: BodyResponseCallback<Schema$Invitation>):
       void|AxiosPromise<Schema$Invitation> {
@@ -3887,12 +3897,12 @@ export class Resource$Invitations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -3941,11 +3951,11 @@ export class Resource$Invitations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Invitation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Invitation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Invitation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Invitation>,
       callback?: BodyResponseCallback<Schema$Invitation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Invitation>,
       callback?: BodyResponseCallback<Schema$Invitation>):
       void|AxiosPromise<Schema$Invitation> {
@@ -3999,15 +4009,15 @@ export class Resource$Invitations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListInvitationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListInvitationsResponse>,
       callback?: BodyResponseCallback<Schema$ListInvitationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListInvitationsResponse>,
       callback?: BodyResponseCallback<Schema$ListInvitationsResponse>):
@@ -4084,14 +4094,14 @@ export class Resource$Registrations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Registration>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Registration>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Registration>,
       callback?: BodyResponseCallback<Schema$Registration>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Registration>,
       callback?: BodyResponseCallback<Schema$Registration>):
       void|AxiosPromise<Schema$Registration> {
@@ -4138,12 +4148,12 @@ export class Resource$Registrations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -4209,11 +4219,11 @@ export class Resource$Userprofiles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$UserProfile>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UserProfile>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$UserProfile>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UserProfile>,
       callback?: BodyResponseCallback<Schema$UserProfile>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UserProfile>,
       callback?: BodyResponseCallback<Schema$UserProfile>):
       void|AxiosPromise<Schema$UserProfile> {
@@ -4295,14 +4305,14 @@ export class Resource$Userprofiles$Guardianinvitations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GuardianInvitation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GuardianInvitation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GuardianInvitation>,
       callback?: BodyResponseCallback<Schema$GuardianInvitation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GuardianInvitation>,
       callback?: BodyResponseCallback<Schema$GuardianInvitation>):
       void|AxiosPromise<Schema$GuardianInvitation> {
@@ -4359,12 +4369,12 @@ export class Resource$Userprofiles$Guardianinvitations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$GuardianInvitation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GuardianInvitation>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GuardianInvitation>,
       callback?: BodyResponseCallback<Schema$GuardianInvitation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GuardianInvitation>,
       callback?: BodyResponseCallback<Schema$GuardianInvitation>):
       void|AxiosPromise<Schema$GuardianInvitation> {
@@ -4429,16 +4439,16 @@ export class Resource$Userprofiles$Guardianinvitations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListGuardianInvitationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListGuardianInvitationsResponse>,
       callback?: BodyResponseCallback<Schema$ListGuardianInvitationsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListGuardianInvitationsResponse>,
       callback?: BodyResponseCallback<Schema$ListGuardianInvitationsResponse>):
@@ -4504,14 +4514,14 @@ export class Resource$Userprofiles$Guardianinvitations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GuardianInvitation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GuardianInvitation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GuardianInvitation>,
       callback?: BodyResponseCallback<Schema$GuardianInvitation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GuardianInvitation>,
       callback?: BodyResponseCallback<Schema$GuardianInvitation>):
       void|AxiosPromise<Schema$GuardianInvitation> {
@@ -4584,12 +4594,12 @@ export class Resource$Userprofiles$Guardians {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -4647,10 +4657,11 @@ export class Resource$Userprofiles$Guardians {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Guardian>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Guardian>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Guardian>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Guardian>,
       callback?: BodyResponseCallback<Schema$Guardian>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Guardian>,
       callback?: BodyResponseCallback<Schema$Guardian>):
       void|AxiosPromise<Schema$Guardian> {
@@ -4716,14 +4727,15 @@ export class Resource$Userprofiles$Guardians {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListGuardiansResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListGuardiansResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ListGuardiansResponse>,
       callback?: BodyResponseCallback<Schema$ListGuardiansResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListGuardiansResponse>,
       callback?: BodyResponseCallback<Schema$ListGuardiansResponse>):
diff --git a/src/apis/cloudbilling/v1.ts b/src/apis/cloudbilling/v1.ts
index 0c55b2ca2f..fec1eab28b 100644
--- a/src/apis/cloudbilling/v1.ts
+++ b/src/apis/cloudbilling/v1.ts
@@ -617,14 +617,14 @@ export class Resource$Billingaccounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BillingAccount>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BillingAccount>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BillingAccount>,
       callback?: BodyResponseCallback<Schema$BillingAccount>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BillingAccount>,
       callback?: BodyResponseCallback<Schema$BillingAccount>):
       void|AxiosPromise<Schema$BillingAccount> {
@@ -727,12 +727,12 @@ export class Resource$Billingaccounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$BillingAccount>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BillingAccount>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BillingAccount>,
       callback?: BodyResponseCallback<Schema$BillingAccount>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BillingAccount>,
       callback?: BodyResponseCallback<Schema$BillingAccount>):
       void|AxiosPromise<Schema$BillingAccount> {
@@ -783,13 +783,13 @@ export class Resource$Billingaccounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -902,16 +902,16 @@ export class Resource$Billingaccounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListBillingAccountsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListBillingAccountsResponse>,
       callback?: BodyResponseCallback<Schema$ListBillingAccountsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListBillingAccountsResponse>,
       callback?: BodyResponseCallback<Schema$ListBillingAccountsResponse>):
@@ -967,14 +967,14 @@ export class Resource$Billingaccounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BillingAccount>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BillingAccount>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BillingAccount>,
       callback?: BodyResponseCallback<Schema$BillingAccount>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BillingAccount>,
       callback?: BodyResponseCallback<Schema$BillingAccount>):
       void|AxiosPromise<Schema$BillingAccount> {
@@ -1026,13 +1026,13 @@ export class Resource$Billingaccounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -1083,15 +1083,15 @@ export class Resource$Billingaccounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestIamPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>):
@@ -1224,16 +1224,16 @@ export class Resource$Billingaccounts$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListProjectBillingInfoResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListProjectBillingInfoResponse>,
       callback?: BodyResponseCallback<Schema$ListProjectBillingInfoResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListProjectBillingInfoResponse>,
       callback?: BodyResponseCallback<Schema$ListProjectBillingInfoResponse>):
@@ -1352,14 +1352,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getBillingInfo(params: any, options?: MethodOptions):
+  getBillingInfo(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ProjectBillingInfo>;
   getBillingInfo(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ProjectBillingInfo>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ProjectBillingInfo>,
       callback?: BodyResponseCallback<Schema$ProjectBillingInfo>): void;
   getBillingInfo(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ProjectBillingInfo>,
       callback?: BodyResponseCallback<Schema$ProjectBillingInfo>):
       void|AxiosPromise<Schema$ProjectBillingInfo> {
@@ -1489,14 +1489,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  updateBillingInfo(params: any, options?: MethodOptions):
+  updateBillingInfo(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ProjectBillingInfo>;
   updateBillingInfo(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ProjectBillingInfo>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ProjectBillingInfo>,
       callback?: BodyResponseCallback<Schema$ProjectBillingInfo>): void;
   updateBillingInfo(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ProjectBillingInfo>,
       callback?: BodyResponseCallback<Schema$ProjectBillingInfo>):
       void|AxiosPromise<Schema$ProjectBillingInfo> {
@@ -1620,14 +1620,14 @@ export class Resource$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListServicesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListServicesResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListServicesResponse>,
       callback?: BodyResponseCallback<Schema$ListServicesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListServicesResponse>,
       callback?: BodyResponseCallback<Schema$ListServicesResponse>):
       void|AxiosPromise<Schema$ListServicesResponse> {
@@ -1755,14 +1755,14 @@ export class Resource$Services$Skus {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListSkusResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListSkusResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListSkusResponse>,
       callback?: BodyResponseCallback<Schema$ListSkusResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListSkusResponse>,
       callback?: BodyResponseCallback<Schema$ListSkusResponse>):
       void|AxiosPromise<Schema$ListSkusResponse> {
diff --git a/src/apis/cloudbuild/v1.ts b/src/apis/cloudbuild/v1.ts
index e855beb06d..11a20ccbc0 100644
--- a/src/apis/cloudbuild/v1.ts
+++ b/src/apis/cloudbuild/v1.ts
@@ -788,12 +788,12 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancel(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  cancel(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   cancel(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   cancel(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -840,11 +840,11 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -901,15 +901,15 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListOperationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>):
@@ -985,12 +985,12 @@ export class Resource$Projects$Builds {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancel(params: any, options?: MethodOptions): AxiosPromise<Schema$Build>;
+  cancel(params?: any, options?: MethodOptions): AxiosPromise<Schema$Build>;
   cancel(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Build>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Build>,
       callback?: BodyResponseCallback<Schema$Build>): void;
   cancel(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Build>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Build>,
       callback?: BodyResponseCallback<Schema$Build>):
       void|AxiosPromise<Schema$Build> {
     if (typeof options === 'function') {
@@ -1040,13 +1040,13 @@ export class Resource$Projects$Builds {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1096,10 +1096,10 @@ export class Resource$Projects$Builds {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Build>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Build>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Build>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Build>,
       callback?: BodyResponseCallback<Schema$Build>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Build>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Build>,
       callback?: BodyResponseCallback<Schema$Build>):
       void|AxiosPromise<Schema$Build> {
     if (typeof options === 'function') {
@@ -1149,14 +1149,14 @@ export class Resource$Projects$Builds {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListBuildsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListBuildsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListBuildsResponse>,
       callback?: BodyResponseCallback<Schema$ListBuildsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListBuildsResponse>,
       callback?: BodyResponseCallback<Schema$ListBuildsResponse>):
       void|AxiosPromise<Schema$ListBuildsResponse> {
@@ -1220,13 +1220,13 @@ export class Resource$Projects$Builds {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  retry(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  retry(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   retry(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   retry(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1286,14 +1286,14 @@ export class Resource$Projects$Triggers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BuildTrigger>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BuildTrigger>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BuildTrigger>,
       callback?: BodyResponseCallback<Schema$BuildTrigger>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BuildTrigger>,
       callback?: BodyResponseCallback<Schema$BuildTrigger>):
       void|AxiosPromise<Schema$BuildTrigger> {
@@ -1342,12 +1342,12 @@ export class Resource$Projects$Triggers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1395,11 +1395,11 @@ export class Resource$Projects$Triggers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$BuildTrigger>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BuildTrigger>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$BuildTrigger>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BuildTrigger>,
       callback?: BodyResponseCallback<Schema$BuildTrigger>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BuildTrigger>,
       callback?: BodyResponseCallback<Schema$BuildTrigger>):
       void|AxiosPromise<Schema$BuildTrigger> {
@@ -1446,15 +1446,15 @@ export class Resource$Projects$Triggers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListBuildTriggersResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListBuildTriggersResponse>,
       callback?: BodyResponseCallback<Schema$ListBuildTriggersResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListBuildTriggersResponse>,
       callback?: BodyResponseCallback<Schema$ListBuildTriggersResponse>):
@@ -1505,14 +1505,14 @@ export class Resource$Projects$Triggers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BuildTrigger>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BuildTrigger>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BuildTrigger>,
       callback?: BodyResponseCallback<Schema$BuildTrigger>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BuildTrigger>,
       callback?: BodyResponseCallback<Schema$BuildTrigger>):
       void|AxiosPromise<Schema$BuildTrigger> {
@@ -1561,11 +1561,11 @@ export class Resource$Projects$Triggers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  run(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  run(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  run(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  run(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  run(params: any,
+  run(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
diff --git a/src/apis/clouddebugger/v2.ts b/src/apis/clouddebugger/v2.ts
index f543a43170..d497b3aa11 100644
--- a/src/apis/clouddebugger/v2.ts
+++ b/src/apis/clouddebugger/v2.ts
@@ -783,15 +783,15 @@ export class Resource$Controller$Debuggees {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  register(params: any, options?: MethodOptions):
+  register(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RegisterDebuggeeResponse>;
   register(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$RegisterDebuggeeResponse>,
       callback?: BodyResponseCallback<Schema$RegisterDebuggeeResponse>): void;
   register(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$RegisterDebuggeeResponse>,
       callback?: BodyResponseCallback<Schema$RegisterDebuggeeResponse>):
@@ -911,16 +911,16 @@ export class Resource$Controller$Debuggees$Breakpoints {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListActiveBreakpointsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListActiveBreakpointsResponse>,
       callback?: BodyResponseCallback<Schema$ListActiveBreakpointsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListActiveBreakpointsResponse>,
       callback?: BodyResponseCallback<Schema$ListActiveBreakpointsResponse>):
@@ -1036,16 +1036,16 @@ export class Resource$Controller$Debuggees$Breakpoints {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$UpdateActiveBreakpointResponse>;
   update(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$UpdateActiveBreakpointResponse>,
       callback?: BodyResponseCallback<Schema$UpdateActiveBreakpointResponse>):
       void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$UpdateActiveBreakpointResponse>,
       callback?: BodyResponseCallback<Schema$UpdateActiveBreakpointResponse>):
@@ -1176,14 +1176,15 @@ export class Resource$Debugger$Debuggees {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListDebuggeesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListDebuggeesResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ListDebuggeesResponse>,
       callback?: BodyResponseCallback<Schema$ListDebuggeesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListDebuggeesResponse>,
       callback?: BodyResponseCallback<Schema$ListDebuggeesResponse>):
@@ -1294,12 +1295,12 @@ export class Resource$Debugger$Debuggees$Breakpoints {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1402,12 +1403,13 @@ export class Resource$Debugger$Debuggees$Breakpoints {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$GetBreakpointResponse>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GetBreakpointResponse>,
+  get(params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$GetBreakpointResponse>,
       callback?: BodyResponseCallback<Schema$GetBreakpointResponse>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GetBreakpointResponse>,
       callback?: BodyResponseCallback<Schema$GetBreakpointResponse>):
@@ -1513,15 +1515,15 @@ export class Resource$Debugger$Debuggees$Breakpoints {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListBreakpointsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListBreakpointsResponse>,
       callback?: BodyResponseCallback<Schema$ListBreakpointsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListBreakpointsResponse>,
       callback?: BodyResponseCallback<Schema$ListBreakpointsResponse>):
@@ -1625,12 +1627,13 @@ export class Resource$Debugger$Debuggees$Breakpoints {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  set(params: any,
+  set(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$SetBreakpointResponse>;
-  set(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SetBreakpointResponse>,
+  set(params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$SetBreakpointResponse>,
       callback?: BodyResponseCallback<Schema$SetBreakpointResponse>): void;
-  set(params: any,
+  set(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SetBreakpointResponse>,
       callback?: BodyResponseCallback<Schema$SetBreakpointResponse>):
diff --git a/src/apis/clouderrorreporting/v1beta1.ts b/src/apis/clouderrorreporting/v1beta1.ts
index 0a0d25f0f6..bb372ed46d 100644
--- a/src/apis/clouderrorreporting/v1beta1.ts
+++ b/src/apis/clouderrorreporting/v1beta1.ts
@@ -453,14 +453,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  deleteEvents(params: any, options?: MethodOptions):
+  deleteEvents(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DeleteEventsResponse>;
   deleteEvents(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DeleteEventsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DeleteEventsResponse>,
       callback?: BodyResponseCallback<Schema$DeleteEventsResponse>): void;
   deleteEvents(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DeleteEventsResponse>,
       callback?: BodyResponseCallback<Schema$DeleteEventsResponse>):
       void|AxiosPromise<Schema$DeleteEventsResponse> {
@@ -526,14 +526,14 @@ export class Resource$Projects$Events {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListEventsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListEventsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListEventsResponse>,
       callback?: BodyResponseCallback<Schema$ListEventsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListEventsResponse>,
       callback?: BodyResponseCallback<Schema$ListEventsResponse>):
       void|AxiosPromise<Schema$ListEventsResponse> {
@@ -587,15 +587,15 @@ export class Resource$Projects$Events {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  report(params: any, options?: MethodOptions):
+  report(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ReportErrorEventResponse>;
   report(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ReportErrorEventResponse>,
       callback?: BodyResponseCallback<Schema$ReportErrorEventResponse>): void;
   report(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ReportErrorEventResponse>,
       callback?: BodyResponseCallback<Schema$ReportErrorEventResponse>):
@@ -656,11 +656,11 @@ export class Resource$Projects$Groups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$ErrorGroup>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ErrorGroup>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$ErrorGroup>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ErrorGroup>,
       callback?: BodyResponseCallback<Schema$ErrorGroup>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ErrorGroup>,
       callback?: BodyResponseCallback<Schema$ErrorGroup>):
       void|AxiosPromise<Schema$ErrorGroup> {
@@ -710,13 +710,14 @@ export class Resource$Projects$Groups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$ErrorGroup>;
+  update(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$ErrorGroup>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ErrorGroup>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ErrorGroup>,
       callback?: BodyResponseCallback<Schema$ErrorGroup>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ErrorGroup>,
       callback?: BodyResponseCallback<Schema$ErrorGroup>):
       void|AxiosPromise<Schema$ErrorGroup> {
@@ -786,15 +787,15 @@ export class Resource$Projects$Groupstats {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListGroupStatsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListGroupStatsResponse>,
       callback?: BodyResponseCallback<Schema$ListGroupStatsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListGroupStatsResponse>,
       callback?: BodyResponseCallback<Schema$ListGroupStatsResponse>):
diff --git a/src/apis/cloudfunctions/v1.ts b/src/apis/cloudfunctions/v1.ts
index 175ace83de..32b6eabf41 100644
--- a/src/apis/cloudfunctions/v1.ts
+++ b/src/apis/cloudfunctions/v1.ts
@@ -536,11 +536,11 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -597,15 +597,15 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListOperationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>):
@@ -682,14 +682,15 @@ export class Resource$Projects$Locations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListLocationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListLocationsResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ListLocationsResponse>,
       callback?: BodyResponseCallback<Schema$ListLocationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListLocationsResponse>,
       callback?: BodyResponseCallback<Schema$ListLocationsResponse>):
@@ -750,14 +751,14 @@ export class Resource$Projects$Locations$Functions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  call(params: any, options?: MethodOptions):
+  call(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CallFunctionResponse>;
   call(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CallFunctionResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CallFunctionResponse>,
       callback?: BodyResponseCallback<Schema$CallFunctionResponse>): void;
   call(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CallFunctionResponse>,
       callback?: BodyResponseCallback<Schema$CallFunctionResponse>):
       void|AxiosPromise<Schema$CallFunctionResponse> {
@@ -806,13 +807,13 @@ export class Resource$Projects$Locations$Functions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -861,13 +862,13 @@ export class Resource$Projects$Locations$Functions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -917,16 +918,16 @@ export class Resource$Projects$Locations$Functions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  generateDownloadUrl(params: any, options?: MethodOptions):
+  generateDownloadUrl(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GenerateDownloadUrlResponse>;
   generateDownloadUrl(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GenerateDownloadUrlResponse>,
       callback?: BodyResponseCallback<Schema$GenerateDownloadUrlResponse>):
       void;
   generateDownloadUrl(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GenerateDownloadUrlResponse>,
       callback?: BodyResponseCallback<Schema$GenerateDownloadUrlResponse>):
@@ -985,15 +986,15 @@ export class Resource$Projects$Locations$Functions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  generateUploadUrl(params: any, options?: MethodOptions):
+  generateUploadUrl(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GenerateUploadUrlResponse>;
   generateUploadUrl(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GenerateUploadUrlResponse>,
       callback?: BodyResponseCallback<Schema$GenerateUploadUrlResponse>): void;
   generateUploadUrl(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GenerateUploadUrlResponse>,
       callback?: BodyResponseCallback<Schema$GenerateUploadUrlResponse>):
@@ -1041,11 +1042,12 @@ export class Resource$Projects$Locations$Functions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$CloudFunction>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CloudFunction>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$CloudFunction>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CloudFunction>,
       callback?: BodyResponseCallback<Schema$CloudFunction>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CloudFunction>,
       callback?: BodyResponseCallback<Schema$CloudFunction>):
       void|AxiosPromise<Schema$CloudFunction> {
@@ -1093,14 +1095,15 @@ export class Resource$Projects$Locations$Functions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListFunctionsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListFunctionsResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ListFunctionsResponse>,
       callback?: BodyResponseCallback<Schema$ListFunctionsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListFunctionsResponse>,
       callback?: BodyResponseCallback<Schema$ListFunctionsResponse>):
@@ -1150,13 +1153,13 @@ export class Resource$Projects$Locations$Functions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
diff --git a/src/apis/cloudfunctions/v1beta2.ts b/src/apis/cloudfunctions/v1beta2.ts
index 1c297b1619..0877a20eba 100644
--- a/src/apis/cloudfunctions/v1beta2.ts
+++ b/src/apis/cloudfunctions/v1beta2.ts
@@ -557,11 +557,11 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -618,15 +618,15 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListOperationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>):
@@ -704,14 +704,15 @@ export class Resource$Projects$Locations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListLocationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListLocationsResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ListLocationsResponse>,
       callback?: BodyResponseCallback<Schema$ListLocationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListLocationsResponse>,
       callback?: BodyResponseCallback<Schema$ListLocationsResponse>):
@@ -772,14 +773,14 @@ export class Resource$Projects$Locations$Functions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  call(params: any, options?: MethodOptions):
+  call(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CallFunctionResponse>;
   call(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CallFunctionResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CallFunctionResponse>,
       callback?: BodyResponseCallback<Schema$CallFunctionResponse>): void;
   call(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CallFunctionResponse>,
       callback?: BodyResponseCallback<Schema$CallFunctionResponse>):
       void|AxiosPromise<Schema$CallFunctionResponse> {
@@ -829,13 +830,13 @@ export class Resource$Projects$Locations$Functions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -884,13 +885,13 @@ export class Resource$Projects$Locations$Functions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -940,16 +941,16 @@ export class Resource$Projects$Locations$Functions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  generateDownloadUrl(params: any, options?: MethodOptions):
+  generateDownloadUrl(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GenerateDownloadUrlResponse>;
   generateDownloadUrl(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GenerateDownloadUrlResponse>,
       callback?: BodyResponseCallback<Schema$GenerateDownloadUrlResponse>):
       void;
   generateDownloadUrl(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GenerateDownloadUrlResponse>,
       callback?: BodyResponseCallback<Schema$GenerateDownloadUrlResponse>):
@@ -1008,15 +1009,15 @@ export class Resource$Projects$Locations$Functions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  generateUploadUrl(params: any, options?: MethodOptions):
+  generateUploadUrl(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GenerateUploadUrlResponse>;
   generateUploadUrl(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GenerateUploadUrlResponse>,
       callback?: BodyResponseCallback<Schema$GenerateUploadUrlResponse>): void;
   generateUploadUrl(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GenerateUploadUrlResponse>,
       callback?: BodyResponseCallback<Schema$GenerateUploadUrlResponse>):
@@ -1064,11 +1065,12 @@ export class Resource$Projects$Locations$Functions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$CloudFunction>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CloudFunction>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$CloudFunction>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CloudFunction>,
       callback?: BodyResponseCallback<Schema$CloudFunction>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CloudFunction>,
       callback?: BodyResponseCallback<Schema$CloudFunction>):
       void|AxiosPromise<Schema$CloudFunction> {
@@ -1116,14 +1118,15 @@ export class Resource$Projects$Locations$Functions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListFunctionsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListFunctionsResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ListFunctionsResponse>,
       callback?: BodyResponseCallback<Schema$ListFunctionsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListFunctionsResponse>,
       callback?: BodyResponseCallback<Schema$ListFunctionsResponse>):
@@ -1172,13 +1175,13 @@ export class Resource$Projects$Locations$Functions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
diff --git a/src/apis/cloudiot/v1.ts b/src/apis/cloudiot/v1.ts
index 97219e7d41..f978ee1c3b 100644
--- a/src/apis/cloudiot/v1.ts
+++ b/src/apis/cloudiot/v1.ts
@@ -696,14 +696,14 @@ export class Resource$Projects$Locations$Registries {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DeviceRegistry>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DeviceRegistry>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DeviceRegistry>,
       callback?: BodyResponseCallback<Schema$DeviceRegistry>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DeviceRegistry>,
       callback?: BodyResponseCallback<Schema$DeviceRegistry>):
       void|AxiosPromise<Schema$DeviceRegistry> {
@@ -750,12 +750,12 @@ export class Resource$Projects$Locations$Registries {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -800,12 +800,12 @@ export class Resource$Projects$Locations$Registries {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$DeviceRegistry>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DeviceRegistry>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DeviceRegistry>,
       callback?: BodyResponseCallback<Schema$DeviceRegistry>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DeviceRegistry>,
       callback?: BodyResponseCallback<Schema$DeviceRegistry>):
       void|AxiosPromise<Schema$DeviceRegistry> {
@@ -853,13 +853,13 @@ export class Resource$Projects$Locations$Registries {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -907,16 +907,16 @@ export class Resource$Projects$Locations$Registries {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListDeviceRegistriesResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListDeviceRegistriesResponse>,
       callback?: BodyResponseCallback<Schema$ListDeviceRegistriesResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListDeviceRegistriesResponse>,
       callback?: BodyResponseCallback<Schema$ListDeviceRegistriesResponse>):
@@ -967,14 +967,14 @@ export class Resource$Projects$Locations$Registries {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DeviceRegistry>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DeviceRegistry>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DeviceRegistry>,
       callback?: BodyResponseCallback<Schema$DeviceRegistry>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DeviceRegistry>,
       callback?: BodyResponseCallback<Schema$DeviceRegistry>):
       void|AxiosPromise<Schema$DeviceRegistry> {
@@ -1022,13 +1022,13 @@ export class Resource$Projects$Locations$Registries {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -1077,15 +1077,15 @@ export class Resource$Projects$Locations$Registries {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestIamPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>):
@@ -1151,12 +1151,12 @@ export class Resource$Projects$Locations$Registries$Devices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Device>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Device>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Device>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Device>,
       callback?: BodyResponseCallback<Schema$Device>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Device>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Device>,
       callback?: BodyResponseCallback<Schema$Device>):
       void|AxiosPromise<Schema$Device> {
     if (typeof options === 'function') {
@@ -1202,12 +1202,12 @@ export class Resource$Projects$Locations$Registries$Devices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1253,10 +1253,10 @@ export class Resource$Projects$Locations$Registries$Devices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Device>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Device>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Device>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Device>,
       callback?: BodyResponseCallback<Schema$Device>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Device>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Device>,
       callback?: BodyResponseCallback<Schema$Device>):
       void|AxiosPromise<Schema$Device> {
     if (typeof options === 'function') {
@@ -1306,14 +1306,14 @@ export class Resource$Projects$Locations$Registries$Devices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListDevicesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListDevicesResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListDevicesResponse>,
       callback?: BodyResponseCallback<Schema$ListDevicesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListDevicesResponse>,
       callback?: BodyResponseCallback<Schema$ListDevicesResponse>):
       void|AxiosPromise<Schema$ListDevicesResponse> {
@@ -1364,14 +1364,14 @@ export class Resource$Projects$Locations$Registries$Devices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  modifyCloudToDeviceConfig(params: any, options?: MethodOptions):
+  modifyCloudToDeviceConfig(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DeviceConfig>;
   modifyCloudToDeviceConfig(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DeviceConfig>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DeviceConfig>,
       callback?: BodyResponseCallback<Schema$DeviceConfig>): void;
   modifyCloudToDeviceConfig(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DeviceConfig>,
       callback?: BodyResponseCallback<Schema$DeviceConfig>):
       void|AxiosPromise<Schema$DeviceConfig> {
@@ -1420,12 +1420,12 @@ export class Resource$Projects$Locations$Registries$Devices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Device>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Device>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Device>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Device>,
       callback?: BodyResponseCallback<Schema$Device>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Device>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Device>,
       callback?: BodyResponseCallback<Schema$Device>):
       void|AxiosPromise<Schema$Device> {
     if (typeof options === 'function') {
@@ -1483,16 +1483,16 @@ export class Resource$Projects$Locations$Registries$Devices$Configversions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListDeviceConfigVersionsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListDeviceConfigVersionsResponse>,
       callback?: BodyResponseCallback<Schema$ListDeviceConfigVersionsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListDeviceConfigVersionsResponse>,
       callback?: BodyResponseCallback<Schema$ListDeviceConfigVersionsResponse>):
@@ -1556,15 +1556,15 @@ export class Resource$Projects$Locations$Registries$Devices$States {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListDeviceStatesResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListDeviceStatesResponse>,
       callback?: BodyResponseCallback<Schema$ListDeviceStatesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListDeviceStatesResponse>,
       callback?: BodyResponseCallback<Schema$ListDeviceStatesResponse>):
diff --git a/src/apis/cloudkms/v1.ts b/src/apis/cloudkms/v1.ts
index 17437f2b92..5f25215704 100644
--- a/src/apis/cloudkms/v1.ts
+++ b/src/apis/cloudkms/v1.ts
@@ -92,7 +92,7 @@ export class Cloudkms {
  */
 export interface Schema$AuditConfig {
   /**
-   * The configuration for logging of each type of permission. Next ID: 4
+   * The configuration for logging of each type of permission.
    */
   auditLogConfigs: Schema$AuditLogConfig[];
   /**
@@ -533,10 +533,11 @@ export class Resource$Projects$Locations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Location>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Location>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Location>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Location>,
       callback?: BodyResponseCallback<Schema$Location>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Location>,
       callback?: BodyResponseCallback<Schema$Location>):
       void|AxiosPromise<Schema$Location> {
@@ -585,14 +586,15 @@ export class Resource$Projects$Locations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListLocationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListLocationsResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ListLocationsResponse>,
       callback?: BodyResponseCallback<Schema$ListLocationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListLocationsResponse>,
       callback?: BodyResponseCallback<Schema$ListLocationsResponse>):
@@ -655,12 +657,14 @@ export class Resource$Projects$Locations$Keyrings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$KeyRing>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$KeyRing>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$KeyRing>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$KeyRing>,
       callback?: BodyResponseCallback<Schema$KeyRing>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$KeyRing>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$KeyRing>,
       callback?: BodyResponseCallback<Schema$KeyRing>):
       void|AxiosPromise<Schema$KeyRing> {
     if (typeof options === 'function') {
@@ -706,10 +710,12 @@ export class Resource$Projects$Locations$Keyrings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$KeyRing>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$KeyRing>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$KeyRing>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$KeyRing>,
       callback?: BodyResponseCallback<Schema$KeyRing>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$KeyRing>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$KeyRing>,
       callback?: BodyResponseCallback<Schema$KeyRing>):
       void|AxiosPromise<Schema$KeyRing> {
     if (typeof options === 'function') {
@@ -755,13 +761,13 @@ export class Resource$Projects$Locations$Keyrings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -809,14 +815,14 @@ export class Resource$Projects$Locations$Keyrings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListKeyRingsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListKeyRingsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListKeyRingsResponse>,
       callback?: BodyResponseCallback<Schema$ListKeyRingsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListKeyRingsResponse>,
       callback?: BodyResponseCallback<Schema$ListKeyRingsResponse>):
       void|AxiosPromise<Schema$ListKeyRingsResponse> {
@@ -865,13 +871,13 @@ export class Resource$Projects$Locations$Keyrings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -922,15 +928,15 @@ export class Resource$Projects$Locations$Keyrings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestIamPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>):
@@ -997,13 +1003,13 @@ export class Resource$Projects$Locations$Keyrings$Cryptokeys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$CryptoKey>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$CryptoKey>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CryptoKey>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CryptoKey>,
       callback?: BodyResponseCallback<Schema$CryptoKey>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CryptoKey>,
       callback?: BodyResponseCallback<Schema$CryptoKey>):
       void|AxiosPromise<Schema$CryptoKey> {
@@ -1051,14 +1057,14 @@ export class Resource$Projects$Locations$Keyrings$Cryptokeys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  decrypt(params: any, options?: MethodOptions):
+  decrypt(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DecryptResponse>;
   decrypt(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DecryptResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DecryptResponse>,
       callback?: BodyResponseCallback<Schema$DecryptResponse>): void;
   decrypt(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DecryptResponse>,
       callback?: BodyResponseCallback<Schema$DecryptResponse>):
       void|AxiosPromise<Schema$DecryptResponse> {
@@ -1105,14 +1111,14 @@ export class Resource$Projects$Locations$Keyrings$Cryptokeys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  encrypt(params: any, options?: MethodOptions):
+  encrypt(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$EncryptResponse>;
   encrypt(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$EncryptResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$EncryptResponse>,
       callback?: BodyResponseCallback<Schema$EncryptResponse>): void;
   encrypt(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$EncryptResponse>,
       callback?: BodyResponseCallback<Schema$EncryptResponse>):
       void|AxiosPromise<Schema$EncryptResponse> {
@@ -1159,11 +1165,11 @@ export class Resource$Projects$Locations$Keyrings$Cryptokeys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$CryptoKey>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CryptoKey>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$CryptoKey>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CryptoKey>,
       callback?: BodyResponseCallback<Schema$CryptoKey>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CryptoKey>,
       callback?: BodyResponseCallback<Schema$CryptoKey>):
       void|AxiosPromise<Schema$CryptoKey> {
@@ -1210,13 +1216,13 @@ export class Resource$Projects$Locations$Keyrings$Cryptokeys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -1264,15 +1270,15 @@ export class Resource$Projects$Locations$Keyrings$Cryptokeys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListCryptoKeysResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListCryptoKeysResponse>,
       callback?: BodyResponseCallback<Schema$ListCryptoKeysResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListCryptoKeysResponse>,
       callback?: BodyResponseCallback<Schema$ListCryptoKeysResponse>):
@@ -1322,13 +1328,13 @@ export class Resource$Projects$Locations$Keyrings$Cryptokeys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$CryptoKey>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$CryptoKey>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CryptoKey>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CryptoKey>,
       callback?: BodyResponseCallback<Schema$CryptoKey>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CryptoKey>,
       callback?: BodyResponseCallback<Schema$CryptoKey>):
       void|AxiosPromise<Schema$CryptoKey> {
@@ -1376,13 +1382,13 @@ export class Resource$Projects$Locations$Keyrings$Cryptokeys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -1433,15 +1439,15 @@ export class Resource$Projects$Locations$Keyrings$Cryptokeys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestIamPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>):
@@ -1490,14 +1496,14 @@ export class Resource$Projects$Locations$Keyrings$Cryptokeys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  updatePrimaryVersion(params: any, options?: MethodOptions):
+  updatePrimaryVersion(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CryptoKey>;
   updatePrimaryVersion(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CryptoKey>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CryptoKey>,
       callback?: BodyResponseCallback<Schema$CryptoKey>): void;
   updatePrimaryVersion(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CryptoKey>,
       callback?: BodyResponseCallback<Schema$CryptoKey>):
       void|AxiosPromise<Schema$CryptoKey> {
@@ -1558,14 +1564,14 @@ export class Resource$Projects$Locations$Keyrings$Cryptokeys$Cryptokeyversions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CryptoKeyVersion>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CryptoKeyVersion>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CryptoKeyVersion>,
       callback?: BodyResponseCallback<Schema$CryptoKeyVersion>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CryptoKeyVersion>,
       callback?: BodyResponseCallback<Schema$CryptoKeyVersion>):
       void|AxiosPromise<Schema$CryptoKeyVersion> {
@@ -1619,14 +1625,14 @@ export class Resource$Projects$Locations$Keyrings$Cryptokeys$Cryptokeyversions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  destroy(params: any, options?: MethodOptions):
+  destroy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CryptoKeyVersion>;
   destroy(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CryptoKeyVersion>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CryptoKeyVersion>,
       callback?: BodyResponseCallback<Schema$CryptoKeyVersion>): void;
   destroy(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CryptoKeyVersion>,
       callback?: BodyResponseCallback<Schema$CryptoKeyVersion>):
       void|AxiosPromise<Schema$CryptoKeyVersion> {
@@ -1673,12 +1679,12 @@ export class Resource$Projects$Locations$Keyrings$Cryptokeys$Cryptokeyversions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$CryptoKeyVersion>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CryptoKeyVersion>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CryptoKeyVersion>,
       callback?: BodyResponseCallback<Schema$CryptoKeyVersion>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CryptoKeyVersion>,
       callback?: BodyResponseCallback<Schema$CryptoKeyVersion>):
       void|AxiosPromise<Schema$CryptoKeyVersion> {
@@ -1727,16 +1733,16 @@ export class Resource$Projects$Locations$Keyrings$Cryptokeys$Cryptokeyversions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListCryptoKeyVersionsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListCryptoKeyVersionsResponse>,
       callback?: BodyResponseCallback<Schema$ListCryptoKeyVersionsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListCryptoKeyVersionsResponse>,
       callback?: BodyResponseCallback<Schema$ListCryptoKeyVersionsResponse>):
@@ -1790,14 +1796,14 @@ export class Resource$Projects$Locations$Keyrings$Cryptokeys$Cryptokeyversions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CryptoKeyVersion>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CryptoKeyVersion>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CryptoKeyVersion>,
       callback?: BodyResponseCallback<Schema$CryptoKeyVersion>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CryptoKeyVersion>,
       callback?: BodyResponseCallback<Schema$CryptoKeyVersion>):
       void|AxiosPromise<Schema$CryptoKeyVersion> {
@@ -1847,14 +1853,14 @@ export class Resource$Projects$Locations$Keyrings$Cryptokeys$Cryptokeyversions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  restore(params: any, options?: MethodOptions):
+  restore(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CryptoKeyVersion>;
   restore(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CryptoKeyVersion>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CryptoKeyVersion>,
       callback?: BodyResponseCallback<Schema$CryptoKeyVersion>): void;
   restore(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CryptoKeyVersion>,
       callback?: BodyResponseCallback<Schema$CryptoKeyVersion>):
       void|AxiosPromise<Schema$CryptoKeyVersion> {
diff --git a/src/apis/cloudresourcemanager/v1.ts b/src/apis/cloudresourcemanager/v1.ts
index 48fe4938ab..9064aa2a39 100644
--- a/src/apis/cloudresourcemanager/v1.ts
+++ b/src/apis/cloudresourcemanager/v1.ts
@@ -1100,13 +1100,13 @@ export class Resource$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  clearOrgPolicy(params: any, options?: MethodOptions):
+  clearOrgPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Empty>;
   clearOrgPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   clearOrgPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1211,14 +1211,14 @@ export class Resource$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getEffectiveOrgPolicy(params: any, options?: MethodOptions):
+  getEffectiveOrgPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrgPolicy>;
   getEffectiveOrgPolicy(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$OrgPolicy>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OrgPolicy>,
       callback?: BodyResponseCallback<Schema$OrgPolicy>): void;
   getEffectiveOrgPolicy(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$OrgPolicy>,
       callback?: BodyResponseCallback<Schema$OrgPolicy>):
       void|AxiosPromise<Schema$OrgPolicy> {
@@ -1325,14 +1325,14 @@ export class Resource$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getOrgPolicy(params: any, options?: MethodOptions):
+  getOrgPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrgPolicy>;
   getOrgPolicy(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$OrgPolicy>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OrgPolicy>,
       callback?: BodyResponseCallback<Schema$OrgPolicy>): void;
   getOrgPolicy(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$OrgPolicy>,
       callback?: BodyResponseCallback<Schema$OrgPolicy>):
       void|AxiosPromise<Schema$OrgPolicy> {
@@ -1453,16 +1453,16 @@ export class Resource$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listAvailableOrgPolicyConstraints(params: any, options?: MethodOptions):
+  listAvailableOrgPolicyConstraints(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListAvailableOrgPolicyConstraintsResponse>;
   listAvailableOrgPolicyConstraints(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListAvailableOrgPolicyConstraintsResponse>,
       callback?: BodyResponseCallback<
           Schema$ListAvailableOrgPolicyConstraintsResponse>): void;
   listAvailableOrgPolicyConstraints(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListAvailableOrgPolicyConstraintsResponse>,
       callback?: BodyResponseCallback<
@@ -1584,15 +1584,15 @@ export class Resource$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listOrgPolicies(params: any, options?: MethodOptions):
+  listOrgPolicies(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListOrgPoliciesResponse>;
   listOrgPolicies(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListOrgPoliciesResponse>,
       callback?: BodyResponseCallback<Schema$ListOrgPoliciesResponse>): void;
   listOrgPolicies(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListOrgPoliciesResponse>,
       callback?: BodyResponseCallback<Schema$ListOrgPoliciesResponse>):
@@ -1699,14 +1699,14 @@ export class Resource$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setOrgPolicy(params: any, options?: MethodOptions):
+  setOrgPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrgPolicy>;
   setOrgPolicy(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$OrgPolicy>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OrgPolicy>,
       callback?: BodyResponseCallback<Schema$OrgPolicy>): void;
   setOrgPolicy(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$OrgPolicy>,
       callback?: BodyResponseCallback<Schema$OrgPolicy>):
       void|AxiosPromise<Schema$OrgPolicy> {
@@ -1823,12 +1823,12 @@ export class Resource$Liens {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Lien>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Lien>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Lien>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Lien>,
       callback?: BodyResponseCallback<Schema$Lien>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Lien>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Lien>,
       callback?: BodyResponseCallback<Schema$Lien>):
       void|AxiosPromise<Schema$Lien> {
     if (typeof options === 'function') {
@@ -1925,12 +1925,12 @@ export class Resource$Liens {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2043,14 +2043,14 @@ export class Resource$Liens {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListLiensResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListLiensResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListLiensResponse>,
       callback?: BodyResponseCallback<Schema$ListLiensResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListLiensResponse>,
       callback?: BodyResponseCallback<Schema$ListLiensResponse>):
       void|AxiosPromise<Schema$ListLiensResponse> {
@@ -2163,11 +2163,11 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2279,13 +2279,13 @@ export class Resource$Organizations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  clearOrgPolicy(params: any, options?: MethodOptions):
+  clearOrgPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Empty>;
   clearOrgPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   clearOrgPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2386,11 +2386,11 @@ export class Resource$Organizations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Organization>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Organization>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Organization>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Organization>,
       callback?: BodyResponseCallback<Schema$Organization>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Organization>,
       callback?: BodyResponseCallback<Schema$Organization>):
       void|AxiosPromise<Schema$Organization> {
@@ -2496,14 +2496,14 @@ export class Resource$Organizations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getEffectiveOrgPolicy(params: any, options?: MethodOptions):
+  getEffectiveOrgPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrgPolicy>;
   getEffectiveOrgPolicy(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$OrgPolicy>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OrgPolicy>,
       callback?: BodyResponseCallback<Schema$OrgPolicy>): void;
   getEffectiveOrgPolicy(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$OrgPolicy>,
       callback?: BodyResponseCallback<Schema$OrgPolicy>):
       void|AxiosPromise<Schema$OrgPolicy> {
@@ -2612,13 +2612,13 @@ export class Resource$Organizations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -2725,14 +2725,14 @@ export class Resource$Organizations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getOrgPolicy(params: any, options?: MethodOptions):
+  getOrgPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrgPolicy>;
   getOrgPolicy(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$OrgPolicy>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OrgPolicy>,
       callback?: BodyResponseCallback<Schema$OrgPolicy>): void;
   getOrgPolicy(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$OrgPolicy>,
       callback?: BodyResponseCallback<Schema$OrgPolicy>):
       void|AxiosPromise<Schema$OrgPolicy> {
@@ -2854,16 +2854,16 @@ export class Resource$Organizations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listAvailableOrgPolicyConstraints(params: any, options?: MethodOptions):
+  listAvailableOrgPolicyConstraints(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListAvailableOrgPolicyConstraintsResponse>;
   listAvailableOrgPolicyConstraints(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListAvailableOrgPolicyConstraintsResponse>,
       callback?: BodyResponseCallback<
           Schema$ListAvailableOrgPolicyConstraintsResponse>): void;
   listAvailableOrgPolicyConstraints(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListAvailableOrgPolicyConstraintsResponse>,
       callback?: BodyResponseCallback<
@@ -2987,15 +2987,15 @@ export class Resource$Organizations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listOrgPolicies(params: any, options?: MethodOptions):
+  listOrgPolicies(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListOrgPoliciesResponse>;
   listOrgPolicies(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListOrgPoliciesResponse>,
       callback?: BodyResponseCallback<Schema$ListOrgPoliciesResponse>): void;
   listOrgPolicies(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListOrgPoliciesResponse>,
       callback?: BodyResponseCallback<Schema$ListOrgPoliciesResponse>):
@@ -3115,16 +3115,16 @@ export class Resource$Organizations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  search(params: any, options?: MethodOptions):
+  search(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SearchOrganizationsResponse>;
   search(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SearchOrganizationsResponse>,
       callback?: BodyResponseCallback<Schema$SearchOrganizationsResponse>):
       void;
   search(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SearchOrganizationsResponse>,
       callback?: BodyResponseCallback<Schema$SearchOrganizationsResponse>):
@@ -3235,13 +3235,13 @@ export class Resource$Organizations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -3347,14 +3347,14 @@ export class Resource$Organizations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setOrgPolicy(params: any, options?: MethodOptions):
+  setOrgPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrgPolicy>;
   setOrgPolicy(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$OrgPolicy>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OrgPolicy>,
       callback?: BodyResponseCallback<Schema$OrgPolicy>): void;
   setOrgPolicy(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$OrgPolicy>,
       callback?: BodyResponseCallback<Schema$OrgPolicy>):
       void|AxiosPromise<Schema$OrgPolicy> {
@@ -3463,15 +3463,15 @@ export class Resource$Organizations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestIamPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>):
@@ -3586,13 +3586,13 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  clearOrgPolicy(params: any, options?: MethodOptions):
+  clearOrgPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Empty>;
   clearOrgPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   clearOrgPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -3701,13 +3701,13 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3814,12 +3814,12 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -3921,10 +3921,12 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Project>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Project>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Project>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Project>,
       callback?: BodyResponseCallback<Schema$Project>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Project>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Project>,
       callback?: BodyResponseCallback<Schema$Project>):
       void|AxiosPromise<Schema$Project> {
     if (typeof options === 'function') {
@@ -4029,14 +4031,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getAncestry(params: any, options?: MethodOptions):
+  getAncestry(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GetAncestryResponse>;
   getAncestry(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GetAncestryResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GetAncestryResponse>,
       callback?: BodyResponseCallback<Schema$GetAncestryResponse>): void;
   getAncestry(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GetAncestryResponse>,
       callback?: BodyResponseCallback<Schema$GetAncestryResponse>):
       void|AxiosPromise<Schema$GetAncestryResponse> {
@@ -4142,14 +4144,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getEffectiveOrgPolicy(params: any, options?: MethodOptions):
+  getEffectiveOrgPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrgPolicy>;
   getEffectiveOrgPolicy(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$OrgPolicy>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OrgPolicy>,
       callback?: BodyResponseCallback<Schema$OrgPolicy>): void;
   getEffectiveOrgPolicy(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$OrgPolicy>,
       callback?: BodyResponseCallback<Schema$OrgPolicy>):
       void|AxiosPromise<Schema$OrgPolicy> {
@@ -4258,13 +4260,13 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -4370,14 +4372,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getOrgPolicy(params: any, options?: MethodOptions):
+  getOrgPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrgPolicy>;
   getOrgPolicy(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$OrgPolicy>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OrgPolicy>,
       callback?: BodyResponseCallback<Schema$OrgPolicy>): void;
   getOrgPolicy(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$OrgPolicy>,
       callback?: BodyResponseCallback<Schema$OrgPolicy>):
       void|AxiosPromise<Schema$OrgPolicy> {
@@ -4494,14 +4496,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListProjectsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListProjectsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListProjectsResponse>,
       callback?: BodyResponseCallback<Schema$ListProjectsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListProjectsResponse>,
       callback?: BodyResponseCallback<Schema$ListProjectsResponse>):
       void|AxiosPromise<Schema$ListProjectsResponse> {
@@ -4621,16 +4623,16 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listAvailableOrgPolicyConstraints(params: any, options?: MethodOptions):
+  listAvailableOrgPolicyConstraints(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListAvailableOrgPolicyConstraintsResponse>;
   listAvailableOrgPolicyConstraints(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListAvailableOrgPolicyConstraintsResponse>,
       callback?: BodyResponseCallback<
           Schema$ListAvailableOrgPolicyConstraintsResponse>): void;
   listAvailableOrgPolicyConstraints(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListAvailableOrgPolicyConstraintsResponse>,
       callback?: BodyResponseCallback<
@@ -4752,15 +4754,15 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listOrgPolicies(params: any, options?: MethodOptions):
+  listOrgPolicies(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListOrgPoliciesResponse>;
   listOrgPolicies(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListOrgPoliciesResponse>,
       callback?: BodyResponseCallback<Schema$ListOrgPoliciesResponse>): void;
   listOrgPolicies(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListOrgPoliciesResponse>,
       callback?: BodyResponseCallback<Schema$ListOrgPoliciesResponse>):
@@ -4890,13 +4892,13 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -5001,14 +5003,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setOrgPolicy(params: any, options?: MethodOptions):
+  setOrgPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrgPolicy>;
   setOrgPolicy(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$OrgPolicy>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OrgPolicy>,
       callback?: BodyResponseCallback<Schema$OrgPolicy>): void;
   setOrgPolicy(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$OrgPolicy>,
       callback?: BodyResponseCallback<Schema$OrgPolicy>):
       void|AxiosPromise<Schema$OrgPolicy> {
@@ -5114,15 +5116,15 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestIamPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>):
@@ -5230,12 +5232,12 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  undelete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  undelete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   undelete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   undelete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -5344,12 +5346,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Project>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Project>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Project>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Project>,
       callback?: BodyResponseCallback<Schema$Project>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Project>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Project>,
       callback?: BodyResponseCallback<Schema$Project>):
       void|AxiosPromise<Schema$Project> {
     if (typeof options === 'function') {
diff --git a/src/apis/cloudresourcemanager/v1beta1.ts b/src/apis/cloudresourcemanager/v1beta1.ts
index ac738db408..47222977bd 100644
--- a/src/apis/cloudresourcemanager/v1beta1.ts
+++ b/src/apis/cloudresourcemanager/v1beta1.ts
@@ -573,11 +573,11 @@ export class Resource$Organizations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Organization>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Organization>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Organization>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Organization>,
       callback?: BodyResponseCallback<Schema$Organization>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Organization>,
       callback?: BodyResponseCallback<Schema$Organization>):
       void|AxiosPromise<Schema$Organization> {
@@ -683,13 +683,13 @@ export class Resource$Organizations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -803,15 +803,15 @@ export class Resource$Organizations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListOrganizationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListOrganizationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOrganizationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListOrganizationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOrganizationsResponse>):
@@ -919,13 +919,13 @@ export class Resource$Organizations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -1032,15 +1032,15 @@ export class Resource$Organizations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestIamPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>):
@@ -1150,14 +1150,14 @@ export class Resource$Organizations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Organization>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Organization>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Organization>,
       callback?: BodyResponseCallback<Schema$Organization>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Organization>,
       callback?: BodyResponseCallback<Schema$Organization>):
       void|AxiosPromise<Schema$Organization> {
@@ -1275,12 +1275,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Project>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Project>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Project>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Project>,
       callback?: BodyResponseCallback<Schema$Project>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Project>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Project>,
       callback?: BodyResponseCallback<Schema$Project>):
       void|AxiosPromise<Schema$Project> {
     if (typeof options === 'function') {
@@ -1386,12 +1388,12 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1493,10 +1495,12 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Project>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Project>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Project>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Project>,
       callback?: BodyResponseCallback<Schema$Project>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Project>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Project>,
       callback?: BodyResponseCallback<Schema$Project>):
       void|AxiosPromise<Schema$Project> {
     if (typeof options === 'function') {
@@ -1601,14 +1605,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getAncestry(params: any, options?: MethodOptions):
+  getAncestry(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GetAncestryResponse>;
   getAncestry(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GetAncestryResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GetAncestryResponse>,
       callback?: BodyResponseCallback<Schema$GetAncestryResponse>): void;
   getAncestry(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GetAncestryResponse>,
       callback?: BodyResponseCallback<Schema$GetAncestryResponse>):
       void|AxiosPromise<Schema$GetAncestryResponse> {
@@ -1715,13 +1719,13 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -1837,14 +1841,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListProjectsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListProjectsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListProjectsResponse>,
       callback?: BodyResponseCallback<Schema$ListProjectsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListProjectsResponse>,
       callback?: BodyResponseCallback<Schema$ListProjectsResponse>):
       void|AxiosPromise<Schema$ListProjectsResponse> {
@@ -1971,13 +1975,13 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -2081,15 +2085,15 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestIamPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>):
@@ -2197,12 +2201,12 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  undelete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  undelete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   undelete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   undelete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2311,12 +2315,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Project>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Project>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Project>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Project>,
       callback?: BodyResponseCallback<Schema$Project>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Project>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Project>,
       callback?: BodyResponseCallback<Schema$Project>):
       void|AxiosPromise<Schema$Project> {
     if (typeof options === 'function') {
diff --git a/src/apis/cloudresourcemanager/v2.ts b/src/apis/cloudresourcemanager/v2.ts
index 8e810ea10e..fcc79a3a76 100644
--- a/src/apis/cloudresourcemanager/v2.ts
+++ b/src/apis/cloudresourcemanager/v2.ts
@@ -531,13 +531,13 @@ export class Resource$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -589,12 +589,12 @@ export class Resource$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Folder>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Folder>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Folder>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
       callback?: BodyResponseCallback<Schema$Folder>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
       callback?: BodyResponseCallback<Schema$Folder>):
       void|AxiosPromise<Schema$Folder> {
     if (typeof options === 'function') {
@@ -643,10 +643,10 @@ export class Resource$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Folder>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Folder>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Folder>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
       callback?: BodyResponseCallback<Schema$Folder>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
       callback?: BodyResponseCallback<Schema$Folder>):
       void|AxiosPromise<Schema$Folder> {
     if (typeof options === 'function') {
@@ -696,13 +696,13 @@ export class Resource$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -757,14 +757,14 @@ export class Resource$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListFoldersResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListFoldersResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListFoldersResponse>,
       callback?: BodyResponseCallback<Schema$ListFoldersResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListFoldersResponse>,
       callback?: BodyResponseCallback<Schema$ListFoldersResponse>):
       void|AxiosPromise<Schema$ListFoldersResponse> {
@@ -824,13 +824,13 @@ export class Resource$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  move(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  move(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   move(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   move(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -889,12 +889,12 @@ export class Resource$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Folder>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Folder>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Folder>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
       callback?: BodyResponseCallback<Schema$Folder>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
       callback?: BodyResponseCallback<Schema$Folder>):
       void|AxiosPromise<Schema$Folder> {
     if (typeof options === 'function') {
@@ -943,14 +943,15 @@ export class Resource$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  search(params: any, options?: MethodOptions):
+  search(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SearchFoldersResponse>;
   search(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SearchFoldersResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$SearchFoldersResponse>,
       callback?: BodyResponseCallback<Schema$SearchFoldersResponse>): void;
   search(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SearchFoldersResponse>,
       callback?: BodyResponseCallback<Schema$SearchFoldersResponse>):
@@ -1002,13 +1003,13 @@ export class Resource$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -1058,15 +1059,15 @@ export class Resource$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestIamPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>):
@@ -1122,12 +1123,12 @@ export class Resource$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  undelete(params: any, options?: MethodOptions): AxiosPromise<Schema$Folder>;
+  undelete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Folder>;
   undelete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Folder>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
       callback?: BodyResponseCallback<Schema$Folder>): void;
   undelete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
       callback?: BodyResponseCallback<Schema$Folder>):
       void|AxiosPromise<Schema$Folder> {
     if (typeof options === 'function') {
diff --git a/src/apis/cloudresourcemanager/v2beta1.ts b/src/apis/cloudresourcemanager/v2beta1.ts
index e6c12cc58f..9e82cc9ce9 100644
--- a/src/apis/cloudresourcemanager/v2beta1.ts
+++ b/src/apis/cloudresourcemanager/v2beta1.ts
@@ -532,13 +532,13 @@ export class Resource$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -590,12 +590,12 @@ export class Resource$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Folder>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Folder>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Folder>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
       callback?: BodyResponseCallback<Schema$Folder>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
       callback?: BodyResponseCallback<Schema$Folder>):
       void|AxiosPromise<Schema$Folder> {
     if (typeof options === 'function') {
@@ -644,10 +644,10 @@ export class Resource$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Folder>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Folder>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Folder>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
       callback?: BodyResponseCallback<Schema$Folder>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
       callback?: BodyResponseCallback<Schema$Folder>):
       void|AxiosPromise<Schema$Folder> {
     if (typeof options === 'function') {
@@ -697,13 +697,13 @@ export class Resource$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -758,14 +758,14 @@ export class Resource$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListFoldersResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListFoldersResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListFoldersResponse>,
       callback?: BodyResponseCallback<Schema$ListFoldersResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListFoldersResponse>,
       callback?: BodyResponseCallback<Schema$ListFoldersResponse>):
       void|AxiosPromise<Schema$ListFoldersResponse> {
@@ -825,13 +825,13 @@ export class Resource$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  move(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  move(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   move(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   move(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -891,12 +891,12 @@ export class Resource$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Folder>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Folder>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Folder>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
       callback?: BodyResponseCallback<Schema$Folder>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
       callback?: BodyResponseCallback<Schema$Folder>):
       void|AxiosPromise<Schema$Folder> {
     if (typeof options === 'function') {
@@ -945,14 +945,15 @@ export class Resource$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  search(params: any, options?: MethodOptions):
+  search(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SearchFoldersResponse>;
   search(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SearchFoldersResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$SearchFoldersResponse>,
       callback?: BodyResponseCallback<Schema$SearchFoldersResponse>): void;
   search(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SearchFoldersResponse>,
       callback?: BodyResponseCallback<Schema$SearchFoldersResponse>):
@@ -1005,13 +1006,13 @@ export class Resource$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -1061,15 +1062,15 @@ export class Resource$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestIamPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>):
@@ -1125,12 +1126,12 @@ export class Resource$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  undelete(params: any, options?: MethodOptions): AxiosPromise<Schema$Folder>;
+  undelete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Folder>;
   undelete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Folder>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
       callback?: BodyResponseCallback<Schema$Folder>): void;
   undelete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
       callback?: BodyResponseCallback<Schema$Folder>):
       void|AxiosPromise<Schema$Folder> {
     if (typeof options === 'function') {
diff --git a/src/apis/cloudshell/v1.ts b/src/apis/cloudshell/v1.ts
index a617a3bc4e..f5beb21ba0 100644
--- a/src/apis/cloudshell/v1.ts
+++ b/src/apis/cloudshell/v1.ts
@@ -309,12 +309,12 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancel(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  cancel(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   cancel(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   cancel(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -362,12 +362,12 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -414,11 +414,11 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -475,15 +475,15 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListOperationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>):
diff --git a/src/apis/cloudshell/v1alpha1.ts b/src/apis/cloudshell/v1alpha1.ts
index 3a3bf35711..ab3eaad8fe 100644
--- a/src/apis/cloudshell/v1alpha1.ts
+++ b/src/apis/cloudshell/v1alpha1.ts
@@ -312,11 +312,11 @@ export class Resource$Users$Environments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Environment>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Environment>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Environment>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Environment>,
       callback?: BodyResponseCallback<Schema$Environment>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Environment>,
       callback?: BodyResponseCallback<Schema$Environment>):
       void|AxiosPromise<Schema$Environment> {
@@ -364,13 +364,14 @@ export class Resource$Users$Environments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Environment>;
+  patch(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Environment>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Environment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Environment>,
       callback?: BodyResponseCallback<Schema$Environment>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Environment>,
       callback?: BodyResponseCallback<Schema$Environment>):
       void|AxiosPromise<Schema$Environment> {
@@ -422,13 +423,13 @@ export class Resource$Users$Environments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  start(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  start(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   start(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   start(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -490,13 +491,13 @@ export class Resource$Users$Environments$Publickeys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$PublicKey>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$PublicKey>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PublicKey>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PublicKey>,
       callback?: BodyResponseCallback<Schema$PublicKey>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PublicKey>,
       callback?: BodyResponseCallback<Schema$PublicKey>):
       void|AxiosPromise<Schema$PublicKey> {
@@ -544,12 +545,12 @@ export class Resource$Users$Environments$Publickeys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
diff --git a/src/apis/cloudtasks/v2beta2.ts b/src/apis/cloudtasks/v2beta2.ts
index e4acaf0b89..9378b8f816 100644
--- a/src/apis/cloudtasks/v2beta2.ts
+++ b/src/apis/cloudtasks/v2beta2.ts
@@ -1078,10 +1078,11 @@ export class Resource$Projects$Locations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Location>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Location>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Location>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Location>,
       callback?: BodyResponseCallback<Schema$Location>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Location>,
       callback?: BodyResponseCallback<Schema$Location>):
       void|AxiosPromise<Schema$Location> {
@@ -1195,14 +1196,15 @@ export class Resource$Projects$Locations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListLocationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListLocationsResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ListLocationsResponse>,
       callback?: BodyResponseCallback<Schema$ListLocationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListLocationsResponse>,
       callback?: BodyResponseCallback<Schema$ListLocationsResponse>):
@@ -1330,12 +1332,12 @@ export class Resource$Projects$Locations$Queues {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Queue>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Queue>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Queue>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Queue>,
       callback?: BodyResponseCallback<Schema$Queue>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Queue>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Queue>,
       callback?: BodyResponseCallback<Schema$Queue>):
       void|AxiosPromise<Schema$Queue> {
     if (typeof options === 'function') {
@@ -1438,12 +1440,12 @@ export class Resource$Projects$Locations$Queues {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1541,10 +1543,10 @@ export class Resource$Projects$Locations$Queues {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Queue>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Queue>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Queue>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Queue>,
       callback?: BodyResponseCallback<Schema$Queue>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Queue>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Queue>,
       callback?: BodyResponseCallback<Schema$Queue>):
       void|AxiosPromise<Schema$Queue> {
     if (typeof options === 'function') {
@@ -1650,13 +1652,13 @@ export class Resource$Projects$Locations$Queues {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -1773,14 +1775,14 @@ export class Resource$Projects$Locations$Queues {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListQueuesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListQueuesResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListQueuesResponse>,
       callback?: BodyResponseCallback<Schema$ListQueuesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListQueuesResponse>,
       callback?: BodyResponseCallback<Schema$ListQueuesResponse>):
       void|AxiosPromise<Schema$ListQueuesResponse> {
@@ -1904,12 +1906,12 @@ export class Resource$Projects$Locations$Queues {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Queue>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Queue>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Queue>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Queue>,
       callback?: BodyResponseCallback<Schema$Queue>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Queue>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Queue>,
       callback?: BodyResponseCallback<Schema$Queue>):
       void|AxiosPromise<Schema$Queue> {
     if (typeof options === 'function') {
@@ -2015,12 +2017,12 @@ export class Resource$Projects$Locations$Queues {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  pause(params: any, options?: MethodOptions): AxiosPromise<Schema$Queue>;
+  pause(params?: any, options?: MethodOptions): AxiosPromise<Schema$Queue>;
   pause(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Queue>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Queue>,
       callback?: BodyResponseCallback<Schema$Queue>): void;
   pause(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Queue>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Queue>,
       callback?: BodyResponseCallback<Schema$Queue>):
       void|AxiosPromise<Schema$Queue> {
     if (typeof options === 'function') {
@@ -2127,12 +2129,12 @@ export class Resource$Projects$Locations$Queues {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  purge(params: any, options?: MethodOptions): AxiosPromise<Schema$Queue>;
+  purge(params?: any, options?: MethodOptions): AxiosPromise<Schema$Queue>;
   purge(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Queue>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Queue>,
       callback?: BodyResponseCallback<Schema$Queue>): void;
   purge(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Queue>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Queue>,
       callback?: BodyResponseCallback<Schema$Queue>):
       void|AxiosPromise<Schema$Queue> {
     if (typeof options === 'function') {
@@ -2242,12 +2244,12 @@ export class Resource$Projects$Locations$Queues {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resume(params: any, options?: MethodOptions): AxiosPromise<Schema$Queue>;
+  resume(params?: any, options?: MethodOptions): AxiosPromise<Schema$Queue>;
   resume(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Queue>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Queue>,
       callback?: BodyResponseCallback<Schema$Queue>): void;
   resume(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Queue>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Queue>,
       callback?: BodyResponseCallback<Schema$Queue>):
       void|AxiosPromise<Schema$Queue> {
     if (typeof options === 'function') {
@@ -2355,13 +2357,13 @@ export class Resource$Projects$Locations$Queues {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -2470,15 +2472,15 @@ export class Resource$Projects$Locations$Queues {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestIamPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>):
@@ -2603,12 +2605,13 @@ export class Resource$Projects$Locations$Queues$Tasks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  acknowledge(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  acknowledge(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Empty>;
   acknowledge(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   acknowledge(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2716,12 +2719,12 @@ export class Resource$Projects$Locations$Queues$Tasks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancelLease(params: any, options?: MethodOptions): AxiosPromise<Schema$Task>;
+  cancelLease(params?: any, options?: MethodOptions): AxiosPromise<Schema$Task>;
   cancelLease(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Task>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
       callback?: BodyResponseCallback<Schema$Task>): void;
   cancelLease(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
       callback?: BodyResponseCallback<Schema$Task>):
       void|AxiosPromise<Schema$Task> {
     if (typeof options === 'function') {
@@ -2834,12 +2837,12 @@ export class Resource$Projects$Locations$Queues$Tasks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Task>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Task>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Task>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
       callback?: BodyResponseCallback<Schema$Task>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
       callback?: BodyResponseCallback<Schema$Task>):
       void|AxiosPromise<Schema$Task> {
     if (typeof options === 'function') {
@@ -2939,12 +2942,12 @@ export class Resource$Projects$Locations$Queues$Tasks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -3045,10 +3048,10 @@ export class Resource$Projects$Locations$Queues$Tasks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Task>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Task>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Task>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
       callback?: BodyResponseCallback<Schema$Task>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
       callback?: BodyResponseCallback<Schema$Task>):
       void|AxiosPromise<Schema$Task> {
     if (typeof options === 'function') {
@@ -3102,14 +3105,14 @@ export class Resource$Projects$Locations$Queues$Tasks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  lease(params: any, options?: MethodOptions):
+  lease(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LeaseTasksResponse>;
   lease(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LeaseTasksResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LeaseTasksResponse>,
       callback?: BodyResponseCallback<Schema$LeaseTasksResponse>): void;
   lease(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LeaseTasksResponse>,
       callback?: BodyResponseCallback<Schema$LeaseTasksResponse>):
       void|AxiosPromise<Schema$LeaseTasksResponse> {
@@ -3230,14 +3233,14 @@ export class Resource$Projects$Locations$Queues$Tasks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListTasksResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListTasksResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListTasksResponse>,
       callback?: BodyResponseCallback<Schema$ListTasksResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListTasksResponse>,
       callback?: BodyResponseCallback<Schema$ListTasksResponse>):
       void|AxiosPromise<Schema$ListTasksResponse> {
@@ -3346,12 +3349,12 @@ export class Resource$Projects$Locations$Queues$Tasks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  renewLease(params: any, options?: MethodOptions): AxiosPromise<Schema$Task>;
+  renewLease(params?: any, options?: MethodOptions): AxiosPromise<Schema$Task>;
   renewLease(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Task>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
       callback?: BodyResponseCallback<Schema$Task>): void;
   renewLease(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
       callback?: BodyResponseCallback<Schema$Task>):
       void|AxiosPromise<Schema$Task> {
     if (typeof options === 'function') {
@@ -3470,10 +3473,10 @@ export class Resource$Projects$Locations$Queues$Tasks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  run(params: any, options?: MethodOptions): AxiosPromise<Schema$Task>;
-  run(params: any, options: MethodOptions|BodyResponseCallback<Schema$Task>,
+  run(params?: any, options?: MethodOptions): AxiosPromise<Schema$Task>;
+  run(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
       callback?: BodyResponseCallback<Schema$Task>): void;
-  run(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
+  run(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
       callback?: BodyResponseCallback<Schema$Task>):
       void|AxiosPromise<Schema$Task> {
     if (typeof options === 'function') {
diff --git a/src/apis/cloudtrace/v1.ts b/src/apis/cloudtrace/v1.ts
index d0b03eb03c..85f4f410fd 100644
--- a/src/apis/cloudtrace/v1.ts
+++ b/src/apis/cloudtrace/v1.ts
@@ -261,12 +261,13 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patchTraces(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  patchTraces(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Empty>;
   patchTraces(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   patchTraces(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -379,10 +380,10 @@ export class Resource$Projects$Traces {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Trace>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Trace>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Trace>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Trace>,
       callback?: BodyResponseCallback<Schema$Trace>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Trace>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Trace>,
       callback?: BodyResponseCallback<Schema$Trace>):
       void|AxiosPromise<Schema$Trace> {
     if (typeof options === 'function') {
@@ -501,14 +502,14 @@ export class Resource$Projects$Traces {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListTracesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListTracesResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListTracesResponse>,
       callback?: BodyResponseCallback<Schema$ListTracesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListTracesResponse>,
       callback?: BodyResponseCallback<Schema$ListTracesResponse>):
       void|AxiosPromise<Schema$ListTracesResponse> {
diff --git a/src/apis/cloudtrace/v2.ts b/src/apis/cloudtrace/v2.ts
index 4421199ce8..9e5cc31231 100644
--- a/src/apis/cloudtrace/v2.ts
+++ b/src/apis/cloudtrace/v2.ts
@@ -515,12 +515,12 @@ export class Resource$Projects$Traces {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchWrite(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  batchWrite(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   batchWrite(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   batchWrite(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -578,12 +578,12 @@ export class Resource$Projects$Traces$Spans {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  createSpan(params: any, options?: MethodOptions): AxiosPromise<Schema$Span>;
+  createSpan(params?: any, options?: MethodOptions): AxiosPromise<Schema$Span>;
   createSpan(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Span>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Span>,
       callback?: BodyResponseCallback<Schema$Span>): void;
   createSpan(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Span>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Span>,
       callback?: BodyResponseCallback<Schema$Span>):
       void|AxiosPromise<Schema$Span> {
     if (typeof options === 'function') {
diff --git a/src/apis/compute/alpha.ts b/src/apis/compute/alpha.ts
index 5a2ff73be8..1b24cafa49 100644
--- a/src/apis/compute/alpha.ts
+++ b/src/apis/compute/alpha.ts
@@ -11543,16 +11543,16 @@ export class Resource$Acceleratortypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AcceleratorTypeAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AcceleratorTypeAggregatedList>,
       callback?: BodyResponseCallback<Schema$AcceleratorTypeAggregatedList>):
       void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AcceleratorTypeAggregatedList>,
       callback?: BodyResponseCallback<Schema$AcceleratorTypeAggregatedList>):
@@ -11606,12 +11606,12 @@ export class Resource$Acceleratortypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$AcceleratorType>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AcceleratorType>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AcceleratorType>,
       callback?: BodyResponseCallback<Schema$AcceleratorType>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AcceleratorType>,
       callback?: BodyResponseCallback<Schema$AcceleratorType>):
       void|AxiosPromise<Schema$AcceleratorType> {
@@ -11666,14 +11666,14 @@ export class Resource$Acceleratortypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AcceleratorTypeList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AcceleratorTypeList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AcceleratorTypeList>,
       callback?: BodyResponseCallback<Schema$AcceleratorTypeList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AcceleratorTypeList>,
       callback?: BodyResponseCallback<Schema$AcceleratorTypeList>):
       void|AxiosPromise<Schema$AcceleratorTypeList> {
@@ -11738,14 +11738,15 @@ export class Resource$Addresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AddressAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AddressAggregatedList>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$AddressAggregatedList>,
       callback?: BodyResponseCallback<Schema$AddressAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AddressAggregatedList>,
       callback?: BodyResponseCallback<Schema$AddressAggregatedList>):
@@ -11797,13 +11798,13 @@ export class Resource$Addresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -11854,10 +11855,12 @@ export class Resource$Addresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Address>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Address>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Address>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Address>,
       callback?: BodyResponseCallback<Schema$Address>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Address>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Address>,
       callback?: BodyResponseCallback<Schema$Address>):
       void|AxiosPromise<Schema$Address> {
     if (typeof options === 'function') {
@@ -11909,13 +11912,13 @@ export class Resource$Addresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -11969,13 +11972,13 @@ export class Resource$Addresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$AddressList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$AddressList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AddressList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AddressList>,
       callback?: BodyResponseCallback<Schema$AddressList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AddressList>,
       callback?: BodyResponseCallback<Schema$AddressList>):
       void|AxiosPromise<Schema$AddressList> {
@@ -12029,14 +12032,14 @@ export class Resource$Addresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setLabels(params: any, options?: MethodOptions):
+  setLabels(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setLabels(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setLabels(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -12088,15 +12091,15 @@ export class Resource$Addresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -12162,15 +12165,15 @@ export class Resource$Autoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AutoscalerAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AutoscalerAggregatedList>,
       callback?: BodyResponseCallback<Schema$AutoscalerAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AutoscalerAggregatedList>,
       callback?: BodyResponseCallback<Schema$AutoscalerAggregatedList>):
@@ -12222,13 +12225,13 @@ export class Resource$Autoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -12280,11 +12283,11 @@ export class Resource$Autoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Autoscaler>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Autoscaler>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Autoscaler>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Autoscaler>,
       callback?: BodyResponseCallback<Schema$Autoscaler>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Autoscaler>,
       callback?: BodyResponseCallback<Schema$Autoscaler>):
       void|AxiosPromise<Schema$Autoscaler> {
@@ -12337,13 +12340,13 @@ export class Resource$Autoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -12396,14 +12399,14 @@ export class Resource$Autoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AutoscalerList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AutoscalerList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AutoscalerList>,
       callback?: BodyResponseCallback<Schema$AutoscalerList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AutoscalerList>,
       callback?: BodyResponseCallback<Schema$AutoscalerList>):
       void|AxiosPromise<Schema$AutoscalerList> {
@@ -12457,13 +12460,13 @@ export class Resource$Autoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -12514,15 +12517,15 @@ export class Resource$Autoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -12577,13 +12580,13 @@ export class Resource$Autoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -12646,14 +12649,14 @@ export class Resource$Backendbuckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  addSignedUrlKey(params: any, options?: MethodOptions):
+  addSignedUrlKey(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   addSignedUrlKey(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   addSignedUrlKey(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -12704,13 +12707,13 @@ export class Resource$Backendbuckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -12762,14 +12765,14 @@ export class Resource$Backendbuckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  deleteSignedUrlKey(params: any, options?: MethodOptions):
+  deleteSignedUrlKey(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   deleteSignedUrlKey(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   deleteSignedUrlKey(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -12820,11 +12823,12 @@ export class Resource$Backendbuckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$BackendBucket>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BackendBucket>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$BackendBucket>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BackendBucket>,
       callback?: BodyResponseCallback<Schema$BackendBucket>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BackendBucket>,
       callback?: BodyResponseCallback<Schema$BackendBucket>):
       void|AxiosPromise<Schema$BackendBucket> {
@@ -12875,13 +12879,13 @@ export class Resource$Backendbuckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -12932,13 +12936,13 @@ export class Resource$Backendbuckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -12991,14 +12995,14 @@ export class Resource$Backendbuckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BackendBucketList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BackendBucketList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BackendBucketList>,
       callback?: BodyResponseCallback<Schema$BackendBucketList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BackendBucketList>,
       callback?: BodyResponseCallback<Schema$BackendBucketList>):
       void|AxiosPromise<Schema$BackendBucketList> {
@@ -13051,13 +13055,13 @@ export class Resource$Backendbuckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -13109,13 +13113,13 @@ export class Resource$Backendbuckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -13165,15 +13169,15 @@ export class Resource$Backendbuckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -13227,13 +13231,13 @@ export class Resource$Backendbuckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -13297,14 +13301,14 @@ export class Resource$Backendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  addSignedUrlKey(params: any, options?: MethodOptions):
+  addSignedUrlKey(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   addSignedUrlKey(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   addSignedUrlKey(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -13358,16 +13362,16 @@ export class Resource$Backendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BackendServiceAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$BackendServiceAggregatedList>,
       callback?: BodyResponseCallback<Schema$BackendServiceAggregatedList>):
       void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$BackendServiceAggregatedList>,
       callback?: BodyResponseCallback<Schema$BackendServiceAggregatedList>):
@@ -13420,13 +13424,13 @@ export class Resource$Backendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -13478,14 +13482,14 @@ export class Resource$Backendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  deleteSignedUrlKey(params: any, options?: MethodOptions):
+  deleteSignedUrlKey(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   deleteSignedUrlKey(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   deleteSignedUrlKey(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -13536,12 +13540,12 @@ export class Resource$Backendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$BackendService>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BackendService>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BackendService>,
       callback?: BodyResponseCallback<Schema$BackendService>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BackendService>,
       callback?: BodyResponseCallback<Schema$BackendService>):
       void|AxiosPromise<Schema$BackendService> {
@@ -13592,15 +13596,15 @@ export class Resource$Backendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getHealth(params: any, options?: MethodOptions):
+  getHealth(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BackendServiceGroupHealth>;
   getHealth(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$BackendServiceGroupHealth>,
       callback?: BodyResponseCallback<Schema$BackendServiceGroupHealth>): void;
   getHealth(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$BackendServiceGroupHealth>,
       callback?: BodyResponseCallback<Schema$BackendServiceGroupHealth>):
@@ -13655,13 +13659,13 @@ export class Resource$Backendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -13714,14 +13718,14 @@ export class Resource$Backendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BackendServiceList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BackendServiceList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BackendServiceList>,
       callback?: BodyResponseCallback<Schema$BackendServiceList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BackendServiceList>,
       callback?: BodyResponseCallback<Schema$BackendServiceList>):
       void|AxiosPromise<Schema$BackendServiceList> {
@@ -13776,13 +13780,13 @@ export class Resource$Backendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -13834,14 +13838,14 @@ export class Resource$Backendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setSecurityPolicy(params: any, options?: MethodOptions):
+  setSecurityPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setSecurityPolicy(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setSecurityPolicy(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -13892,15 +13896,15 @@ export class Resource$Backendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -13956,13 +13960,13 @@ export class Resource$Backendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -14027,14 +14031,14 @@ export class Resource$Disks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DiskAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DiskAggregatedList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DiskAggregatedList>,
       callback?: BodyResponseCallback<Schema$DiskAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DiskAggregatedList>,
       callback?: BodyResponseCallback<Schema$DiskAggregatedList>):
       void|AxiosPromise<Schema$DiskAggregatedList> {
@@ -14087,14 +14091,14 @@ export class Resource$Disks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  createSnapshot(params: any, options?: MethodOptions):
+  createSnapshot(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   createSnapshot(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   createSnapshot(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -14149,13 +14153,13 @@ export class Resource$Disks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -14206,10 +14210,10 @@ export class Resource$Disks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Disk>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Disk>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Disk>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Disk>,
       callback?: BodyResponseCallback<Schema$Disk>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Disk>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Disk>,
       callback?: BodyResponseCallback<Schema$Disk>):
       void|AxiosPromise<Schema$Disk> {
     if (typeof options === 'function') {
@@ -14259,13 +14263,13 @@ export class Resource$Disks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -14321,13 +14325,13 @@ export class Resource$Disks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -14381,12 +14385,13 @@ export class Resource$Disks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$DiskList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$DiskList>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$DiskList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DiskList>,
       callback?: BodyResponseCallback<Schema$DiskList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DiskList>,
       callback?: BodyResponseCallback<Schema$DiskList>):
       void|AxiosPromise<Schema$DiskList> {
@@ -14439,13 +14444,13 @@ export class Resource$Disks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resize(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  resize(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   resize(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   resize(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -14498,13 +14503,13 @@ export class Resource$Disks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -14557,14 +14562,14 @@ export class Resource$Disks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setLabels(params: any, options?: MethodOptions):
+  setLabels(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setLabels(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setLabels(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -14616,15 +14621,15 @@ export class Resource$Disks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -14690,15 +14695,15 @@ export class Resource$Disktypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DiskTypeAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$DiskTypeAggregatedList>,
       callback?: BodyResponseCallback<Schema$DiskTypeAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$DiskTypeAggregatedList>,
       callback?: BodyResponseCallback<Schema$DiskTypeAggregatedList>):
@@ -14750,10 +14755,11 @@ export class Resource$Disktypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$DiskType>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$DiskType>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$DiskType>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DiskType>,
       callback?: BodyResponseCallback<Schema$DiskType>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DiskType>,
       callback?: BodyResponseCallback<Schema$DiskType>):
       void|AxiosPromise<Schema$DiskType> {
@@ -14807,13 +14813,14 @@ export class Resource$Disktypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$DiskTypeList>;
+  list(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$DiskTypeList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DiskTypeList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DiskTypeList>,
       callback?: BodyResponseCallback<Schema$DiskTypeList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DiskTypeList>,
       callback?: BodyResponseCallback<Schema$DiskTypeList>):
       void|AxiosPromise<Schema$DiskTypeList> {
@@ -14875,13 +14882,13 @@ export class Resource$Firewalls {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -14931,10 +14938,11 @@ export class Resource$Firewalls {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Firewall>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Firewall>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Firewall>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Firewall>,
       callback?: BodyResponseCallback<Schema$Firewall>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Firewall>,
       callback?: BodyResponseCallback<Schema$Firewall>):
       void|AxiosPromise<Schema$Firewall> {
@@ -14986,13 +14994,13 @@ export class Resource$Firewalls {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -15045,13 +15053,14 @@ export class Resource$Firewalls {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$FirewallList>;
+  list(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$FirewallList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$FirewallList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$FirewallList>,
       callback?: BodyResponseCallback<Schema$FirewallList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$FirewallList>,
       callback?: BodyResponseCallback<Schema$FirewallList>):
       void|AxiosPromise<Schema$FirewallList> {
@@ -15104,13 +15113,13 @@ export class Resource$Firewalls {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -15161,15 +15170,15 @@ export class Resource$Firewalls {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -15224,13 +15233,13 @@ export class Resource$Firewalls {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -15295,16 +15304,16 @@ export class Resource$Forwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ForwardingRuleAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ForwardingRuleAggregatedList>,
       callback?: BodyResponseCallback<Schema$ForwardingRuleAggregatedList>):
       void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ForwardingRuleAggregatedList>,
       callback?: BodyResponseCallback<Schema$ForwardingRuleAggregatedList>):
@@ -15358,13 +15367,13 @@ export class Resource$Forwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -15415,12 +15424,12 @@ export class Resource$Forwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$ForwardingRule>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ForwardingRule>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ForwardingRule>,
       callback?: BodyResponseCallback<Schema$ForwardingRule>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ForwardingRule>,
       callback?: BodyResponseCallback<Schema$ForwardingRule>):
       void|AxiosPromise<Schema$ForwardingRule> {
@@ -15473,13 +15482,13 @@ export class Resource$Forwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -15534,14 +15543,14 @@ export class Resource$Forwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ForwardingRuleList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ForwardingRuleList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ForwardingRuleList>,
       callback?: BodyResponseCallback<Schema$ForwardingRuleList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ForwardingRuleList>,
       callback?: BodyResponseCallback<Schema$ForwardingRuleList>):
       void|AxiosPromise<Schema$ForwardingRuleList> {
@@ -15597,13 +15606,13 @@ export class Resource$Forwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -15657,14 +15666,14 @@ export class Resource$Forwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setLabels(params: any, options?: MethodOptions):
+  setLabels(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setLabels(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setLabels(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -15718,14 +15727,14 @@ export class Resource$Forwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setTarget(params: any, options?: MethodOptions):
+  setTarget(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setTarget(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setTarget(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -15777,15 +15786,15 @@ export class Resource$Forwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -15849,13 +15858,13 @@ export class Resource$Globaladdresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -15906,10 +15915,12 @@ export class Resource$Globaladdresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Address>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Address>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Address>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Address>,
       callback?: BodyResponseCallback<Schema$Address>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Address>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Address>,
       callback?: BodyResponseCallback<Schema$Address>):
       void|AxiosPromise<Schema$Address> {
     if (typeof options === 'function') {
@@ -15960,13 +15971,13 @@ export class Resource$Globaladdresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -16018,13 +16029,13 @@ export class Resource$Globaladdresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$AddressList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$AddressList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AddressList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AddressList>,
       callback?: BodyResponseCallback<Schema$AddressList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AddressList>,
       callback?: BodyResponseCallback<Schema$AddressList>):
       void|AxiosPromise<Schema$AddressList> {
@@ -16075,14 +16086,14 @@ export class Resource$Globaladdresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setLabels(params: any, options?: MethodOptions):
+  setLabels(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setLabels(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setLabels(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -16133,15 +16144,15 @@ export class Resource$Globaladdresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -16205,13 +16216,13 @@ export class Resource$Globalforwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -16262,12 +16273,12 @@ export class Resource$Globalforwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$ForwardingRule>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ForwardingRule>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ForwardingRule>,
       callback?: BodyResponseCallback<Schema$ForwardingRule>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ForwardingRule>,
       callback?: BodyResponseCallback<Schema$ForwardingRule>):
       void|AxiosPromise<Schema$ForwardingRule> {
@@ -16319,13 +16330,13 @@ export class Resource$Globalforwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -16378,14 +16389,14 @@ export class Resource$Globalforwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ForwardingRuleList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ForwardingRuleList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ForwardingRuleList>,
       callback?: BodyResponseCallback<Schema$ForwardingRuleList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ForwardingRuleList>,
       callback?: BodyResponseCallback<Schema$ForwardingRuleList>):
       void|AxiosPromise<Schema$ForwardingRuleList> {
@@ -16439,13 +16450,13 @@ export class Resource$Globalforwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -16497,14 +16508,14 @@ export class Resource$Globalforwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setLabels(params: any, options?: MethodOptions):
+  setLabels(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setLabels(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setLabels(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -16557,14 +16568,14 @@ export class Resource$Globalforwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setTarget(params: any, options?: MethodOptions):
+  setTarget(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setTarget(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setTarget(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -16615,15 +16626,15 @@ export class Resource$Globalforwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -16689,15 +16700,15 @@ export class Resource$Globaloperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OperationAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OperationAggregatedList>,
       callback?: BodyResponseCallback<Schema$OperationAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OperationAggregatedList>,
       callback?: BodyResponseCallback<Schema$OperationAggregatedList>):
@@ -16747,12 +16758,12 @@ export class Resource$Globaloperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -16801,11 +16812,11 @@ export class Resource$Globaloperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -16859,14 +16870,14 @@ export class Resource$Globaloperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OperationList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$OperationList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OperationList>,
       callback?: BodyResponseCallback<Schema$OperationList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$OperationList>,
       callback?: BodyResponseCallback<Schema$OperationList>):
       void|AxiosPromise<Schema$OperationList> {
@@ -16931,15 +16942,15 @@ export class Resource$Healthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$HealthChecksAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$HealthChecksAggregatedList>,
       callback?: BodyResponseCallback<Schema$HealthChecksAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$HealthChecksAggregatedList>,
       callback?: BodyResponseCallback<Schema$HealthChecksAggregatedList>):
@@ -16990,13 +17001,13 @@ export class Resource$Healthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -17047,11 +17058,11 @@ export class Resource$Healthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$HealthCheck>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$HealthCheck>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$HealthCheck>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$HealthCheck>,
       callback?: BodyResponseCallback<Schema$HealthCheck>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$HealthCheck>,
       callback?: BodyResponseCallback<Schema$HealthCheck>):
       void|AxiosPromise<Schema$HealthCheck> {
@@ -17103,13 +17114,13 @@ export class Resource$Healthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -17162,14 +17173,14 @@ export class Resource$Healthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$HealthCheckList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$HealthCheckList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$HealthCheckList>,
       callback?: BodyResponseCallback<Schema$HealthCheckList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$HealthCheckList>,
       callback?: BodyResponseCallback<Schema$HealthCheckList>):
       void|AxiosPromise<Schema$HealthCheckList> {
@@ -17222,13 +17233,13 @@ export class Resource$Healthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -17279,15 +17290,15 @@ export class Resource$Healthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -17341,13 +17352,13 @@ export class Resource$Healthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -17412,14 +17423,14 @@ export class Resource$Hosts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$HostAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$HostAggregatedList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$HostAggregatedList>,
       callback?: BodyResponseCallback<Schema$HostAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$HostAggregatedList>,
       callback?: BodyResponseCallback<Schema$HostAggregatedList>):
       void|AxiosPromise<Schema$HostAggregatedList> {
@@ -17470,13 +17481,13 @@ export class Resource$Hosts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -17527,10 +17538,10 @@ export class Resource$Hosts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Host>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Host>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Host>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Host>,
       callback?: BodyResponseCallback<Schema$Host>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Host>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Host>,
       callback?: BodyResponseCallback<Schema$Host>):
       void|AxiosPromise<Schema$Host> {
     if (typeof options === 'function') {
@@ -17580,13 +17591,13 @@ export class Resource$Hosts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -17638,13 +17649,13 @@ export class Resource$Hosts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -17697,12 +17708,13 @@ export class Resource$Hosts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$HostList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$HostList>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$HostList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$HostList>,
       callback?: BodyResponseCallback<Schema$HostList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$HostList>,
       callback?: BodyResponseCallback<Schema$HostList>):
       void|AxiosPromise<Schema$HostList> {
@@ -17754,13 +17766,13 @@ export class Resource$Hosts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -17811,15 +17823,15 @@ export class Resource$Hosts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -17885,15 +17897,15 @@ export class Resource$Hosttypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$HostTypeAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$HostTypeAggregatedList>,
       callback?: BodyResponseCallback<Schema$HostTypeAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$HostTypeAggregatedList>,
       callback?: BodyResponseCallback<Schema$HostTypeAggregatedList>):
@@ -17945,10 +17957,11 @@ export class Resource$Hosttypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$HostType>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$HostType>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$HostType>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$HostType>,
       callback?: BodyResponseCallback<Schema$HostType>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$HostType>,
       callback?: BodyResponseCallback<Schema$HostType>):
       void|AxiosPromise<Schema$HostType> {
@@ -18002,13 +18015,14 @@ export class Resource$Hosttypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$HostTypeList>;
+  list(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$HostTypeList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$HostTypeList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$HostTypeList>,
       callback?: BodyResponseCallback<Schema$HostTypeList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$HostTypeList>,
       callback?: BodyResponseCallback<Schema$HostTypeList>):
       void|AxiosPromise<Schema$HostTypeList> {
@@ -18070,13 +18084,13 @@ export class Resource$Httphealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -18127,12 +18141,12 @@ export class Resource$Httphealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$HttpHealthCheck>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$HttpHealthCheck>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$HttpHealthCheck>,
       callback?: BodyResponseCallback<Schema$HttpHealthCheck>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$HttpHealthCheck>,
       callback?: BodyResponseCallback<Schema$HttpHealthCheck>):
       void|AxiosPromise<Schema$HttpHealthCheck> {
@@ -18184,13 +18198,13 @@ export class Resource$Httphealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -18243,14 +18257,14 @@ export class Resource$Httphealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$HttpHealthCheckList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$HttpHealthCheckList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$HttpHealthCheckList>,
       callback?: BodyResponseCallback<Schema$HttpHealthCheckList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$HttpHealthCheckList>,
       callback?: BodyResponseCallback<Schema$HttpHealthCheckList>):
       void|AxiosPromise<Schema$HttpHealthCheckList> {
@@ -18303,13 +18317,13 @@ export class Resource$Httphealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -18360,15 +18374,15 @@ export class Resource$Httphealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -18422,13 +18436,13 @@ export class Resource$Httphealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -18491,13 +18505,13 @@ export class Resource$Httpshealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -18548,12 +18562,12 @@ export class Resource$Httpshealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$HttpsHealthCheck>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$HttpsHealthCheck>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$HttpsHealthCheck>,
       callback?: BodyResponseCallback<Schema$HttpsHealthCheck>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$HttpsHealthCheck>,
       callback?: BodyResponseCallback<Schema$HttpsHealthCheck>):
       void|AxiosPromise<Schema$HttpsHealthCheck> {
@@ -18605,13 +18619,13 @@ export class Resource$Httpshealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -18664,14 +18678,14 @@ export class Resource$Httpshealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$HttpsHealthCheckList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$HttpsHealthCheckList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$HttpsHealthCheckList>,
       callback?: BodyResponseCallback<Schema$HttpsHealthCheckList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$HttpsHealthCheckList>,
       callback?: BodyResponseCallback<Schema$HttpsHealthCheckList>):
       void|AxiosPromise<Schema$HttpsHealthCheckList> {
@@ -18724,13 +18738,13 @@ export class Resource$Httpshealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -18781,15 +18795,15 @@ export class Resource$Httpshealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -18843,13 +18857,13 @@ export class Resource$Httpshealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -18912,13 +18926,13 @@ export class Resource$Images {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -18970,14 +18984,14 @@ export class Resource$Images {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  deprecate(params: any, options?: MethodOptions):
+  deprecate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   deprecate(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   deprecate(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -19028,10 +19042,10 @@ export class Resource$Images {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Image>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Image>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Image>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Image>,
       callback?: BodyResponseCallback<Schema$Image>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Image>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Image>,
       callback?: BodyResponseCallback<Schema$Image>):
       void|AxiosPromise<Schema$Image> {
     if (typeof options === 'function') {
@@ -19080,13 +19094,13 @@ export class Resource$Images {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getFromFamily(params: any, options?: MethodOptions):
+  getFromFamily(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Image>;
   getFromFamily(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Image>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Image>,
       callback?: BodyResponseCallback<Schema$Image>): void;
   getFromFamily(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Image>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Image>,
       callback?: BodyResponseCallback<Schema$Image>):
       void|AxiosPromise<Schema$Image> {
     if (typeof options === 'function') {
@@ -19136,13 +19150,13 @@ export class Resource$Images {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -19194,13 +19208,13 @@ export class Resource$Images {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -19256,13 +19270,13 @@ export class Resource$Images {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$ImageList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$ImageList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ImageList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ImageList>,
       callback?: BodyResponseCallback<Schema$ImageList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ImageList>,
       callback?: BodyResponseCallback<Schema$ImageList>):
       void|AxiosPromise<Schema$ImageList> {
@@ -19312,13 +19326,13 @@ export class Resource$Images {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -19369,14 +19383,14 @@ export class Resource$Images {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setLabels(params: any, options?: MethodOptions):
+  setLabels(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setLabels(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setLabels(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -19427,15 +19441,15 @@ export class Resource$Images {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -19512,14 +19526,14 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  abandonInstances(params: any, options?: MethodOptions):
+  abandonInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   abandonInstances(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   abandonInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -19573,17 +19587,17 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstanceGroupManagerAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InstanceGroupManagerAggregatedList>,
       callback?:
           BodyResponseCallback<Schema$InstanceGroupManagerAggregatedList>):
       void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InstanceGroupManagerAggregatedList>,
       callback?:
@@ -19640,14 +19654,14 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  applyUpdatesToInstances(params: any, options?: MethodOptions):
+  applyUpdatesToInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   applyUpdatesToInstances(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   applyUpdatesToInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -19701,13 +19715,13 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -19770,14 +19784,14 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  deleteInstances(params: any, options?: MethodOptions):
+  deleteInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   deleteInstances(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   deleteInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -19829,14 +19843,14 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  deletePerInstanceConfigs(params: any, options?: MethodOptions):
+  deletePerInstanceConfigs(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   deletePerInstanceConfigs(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   deletePerInstanceConfigs(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -19889,12 +19903,12 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$InstanceGroupManager>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InstanceGroupManager>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InstanceGroupManager>,
       callback?: BodyResponseCallback<Schema$InstanceGroupManager>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InstanceGroupManager>,
       callback?: BodyResponseCallback<Schema$InstanceGroupManager>):
       void|AxiosPromise<Schema$InstanceGroupManager> {
@@ -19953,13 +19967,13 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -20014,15 +20028,15 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstanceGroupManagerList>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InstanceGroupManagerList>,
       callback?: BodyResponseCallback<Schema$InstanceGroupManagerList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InstanceGroupManagerList>,
       callback?: BodyResponseCallback<Schema$InstanceGroupManagerList>):
@@ -20083,16 +20097,16 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listManagedInstances(params: any, options?: MethodOptions):
+  listManagedInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstanceGroupManagersListManagedInstancesResponse>;
   listManagedInstances(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$InstanceGroupManagersListManagedInstancesResponse>,
       callback?: BodyResponseCallback<
           Schema$InstanceGroupManagersListManagedInstancesResponse>): void;
   listManagedInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$InstanceGroupManagersListManagedInstancesResponse>,
       callback?: BodyResponseCallback<
@@ -20153,16 +20167,16 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listPerInstanceConfigs(params: any, options?: MethodOptions):
+  listPerInstanceConfigs(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstanceGroupManagersListPerInstanceConfigsResp>;
   listPerInstanceConfigs(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$InstanceGroupManagersListPerInstanceConfigsResp>,
       callback?: BodyResponseCallback<
           Schema$InstanceGroupManagersListPerInstanceConfigsResp>): void;
   listPerInstanceConfigs(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$InstanceGroupManagersListPerInstanceConfigsResp>,
       callback?: BodyResponseCallback<
@@ -20224,13 +20238,13 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -20292,14 +20306,14 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  recreateInstances(params: any, options?: MethodOptions):
+  recreateInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   recreateInstances(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   recreateInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -20360,13 +20374,13 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resize(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  resize(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   resize(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   resize(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -20430,14 +20444,14 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resizeAdvanced(params: any, options?: MethodOptions):
+  resizeAdvanced(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   resizeAdvanced(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   resizeAdvanced(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -20490,14 +20504,14 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setAutoHealingPolicies(params: any, options?: MethodOptions):
+  setAutoHealingPolicies(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setAutoHealingPolicies(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setAutoHealingPolicies(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -20552,14 +20566,14 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setInstanceTemplate(params: any, options?: MethodOptions):
+  setInstanceTemplate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setInstanceTemplate(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setInstanceTemplate(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -20617,14 +20631,14 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setTargetPools(params: any, options?: MethodOptions):
+  setTargetPools(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setTargetPools(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setTargetPools(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -20676,15 +20690,15 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -20742,13 +20756,13 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -20803,14 +20817,14 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  updatePerInstanceConfigs(params: any, options?: MethodOptions):
+  updatePerInstanceConfigs(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   updatePerInstanceConfigs(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   updatePerInstanceConfigs(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -20877,14 +20891,14 @@ export class Resource$Instancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  addInstances(params: any, options?: MethodOptions):
+  addInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   addInstances(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   addInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -20937,16 +20951,16 @@ export class Resource$Instancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstanceGroupAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InstanceGroupAggregatedList>,
       callback?: BodyResponseCallback<Schema$InstanceGroupAggregatedList>):
       void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InstanceGroupAggregatedList>,
       callback?: BodyResponseCallback<Schema$InstanceGroupAggregatedList>):
@@ -21001,13 +21015,13 @@ export class Resource$Instancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -21059,11 +21073,12 @@ export class Resource$Instancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$InstanceGroup>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InstanceGroup>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$InstanceGroup>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InstanceGroup>,
       callback?: BodyResponseCallback<Schema$InstanceGroup>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InstanceGroup>,
       callback?: BodyResponseCallback<Schema$InstanceGroup>):
       void|AxiosPromise<Schema$InstanceGroup> {
@@ -21116,13 +21131,13 @@ export class Resource$Instancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -21177,14 +21192,14 @@ export class Resource$Instancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstanceGroupList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InstanceGroupList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InstanceGroupList>,
       callback?: BodyResponseCallback<Schema$InstanceGroupList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InstanceGroupList>,
       callback?: BodyResponseCallback<Schema$InstanceGroupList>):
       void|AxiosPromise<Schema$InstanceGroupList> {
@@ -21240,16 +21255,16 @@ export class Resource$Instancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listInstances(params: any, options?: MethodOptions):
+  listInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstanceGroupsListInstances>;
   listInstances(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InstanceGroupsListInstances>,
       callback?: BodyResponseCallback<Schema$InstanceGroupsListInstances>):
       void;
   listInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InstanceGroupsListInstances>,
       callback?: BodyResponseCallback<Schema$InstanceGroupsListInstances>):
@@ -21308,14 +21323,14 @@ export class Resource$Instancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  removeInstances(params: any, options?: MethodOptions):
+  removeInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   removeInstances(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   removeInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -21368,14 +21383,14 @@ export class Resource$Instancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setNamedPorts(params: any, options?: MethodOptions):
+  setNamedPorts(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setNamedPorts(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setNamedPorts(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -21427,15 +21442,15 @@ export class Resource$Instancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -21502,14 +21517,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  addAccessConfig(params: any, options?: MethodOptions):
+  addAccessConfig(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   addAccessConfig(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   addAccessConfig(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -21564,14 +21579,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  addMaintenancePolicies(params: any, options?: MethodOptions):
+  addMaintenancePolicies(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   addMaintenancePolicies(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   addMaintenancePolicies(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -21624,15 +21639,15 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstanceAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InstanceAggregatedList>,
       callback?: BodyResponseCallback<Schema$InstanceAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InstanceAggregatedList>,
       callback?: BodyResponseCallback<Schema$InstanceAggregatedList>):
@@ -21689,14 +21704,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  attachDisk(params: any, options?: MethodOptions):
+  attachDisk(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   attachDisk(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   attachDisk(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -21749,13 +21764,13 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -21809,14 +21824,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  deleteAccessConfig(params: any, options?: MethodOptions):
+  deleteAccessConfig(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   deleteAccessConfig(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   deleteAccessConfig(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -21870,14 +21885,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  detachDisk(params: any, options?: MethodOptions):
+  detachDisk(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   detachDisk(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   detachDisk(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -21929,10 +21944,11 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Instance>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Instance>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Instance>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Instance>,
       callback?: BodyResponseCallback<Schema$Instance>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Instance>,
       callback?: BodyResponseCallback<Schema$Instance>):
       void|AxiosPromise<Schema$Instance> {
@@ -21984,14 +22000,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getGuestAttributes(params: any, options?: MethodOptions):
+  getGuestAttributes(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GuestAttributes>;
   getGuestAttributes(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GuestAttributes>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GuestAttributes>,
       callback?: BodyResponseCallback<Schema$GuestAttributes>): void;
   getGuestAttributes(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GuestAttributes>,
       callback?: BodyResponseCallback<Schema$GuestAttributes>):
       void|AxiosPromise<Schema$GuestAttributes> {
@@ -22043,13 +22059,13 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -22101,14 +22117,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getSerialPortOutput(params: any, options?: MethodOptions):
+  getSerialPortOutput(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SerialPortOutput>;
   getSerialPortOutput(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SerialPortOutput>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SerialPortOutput>,
       callback?: BodyResponseCallback<Schema$SerialPortOutput>): void;
   getSerialPortOutput(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SerialPortOutput>,
       callback?: BodyResponseCallback<Schema$SerialPortOutput>):
       void|AxiosPromise<Schema$SerialPortOutput> {
@@ -22162,13 +22178,13 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -22221,13 +22237,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$InstanceList>;
+  list(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$InstanceList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InstanceList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InstanceList>,
       callback?: BodyResponseCallback<Schema$InstanceList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InstanceList>,
       callback?: BodyResponseCallback<Schema$InstanceList>):
       void|AxiosPromise<Schema$InstanceList> {
@@ -22282,14 +22299,15 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listReferrers(params: any, options?: MethodOptions):
+  listReferrers(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstanceListReferrers>;
   listReferrers(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InstanceListReferrers>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$InstanceListReferrers>,
       callback?: BodyResponseCallback<Schema$InstanceListReferrers>): void;
   listReferrers(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InstanceListReferrers>,
       callback?: BodyResponseCallback<Schema$InstanceListReferrers>):
@@ -22343,14 +22361,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  removeMaintenancePolicies(params: any, options?: MethodOptions):
+  removeMaintenancePolicies(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   removeMaintenancePolicies(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   removeMaintenancePolicies(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -22403,13 +22421,13 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  reset(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  reset(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   reset(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   reset(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -22463,13 +22481,13 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resume(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  resume(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   resume(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   resume(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -22522,14 +22540,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setDeletionProtection(params: any, options?: MethodOptions):
+  setDeletionProtection(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setDeletionProtection(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setDeletionProtection(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -22583,14 +22601,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setDiskAutoDelete(params: any, options?: MethodOptions):
+  setDiskAutoDelete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setDiskAutoDelete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setDiskAutoDelete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -22644,13 +22662,13 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -22703,14 +22721,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setLabels(params: any, options?: MethodOptions):
+  setLabels(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setLabels(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setLabels(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -22764,14 +22782,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setMachineResources(params: any, options?: MethodOptions):
+  setMachineResources(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setMachineResources(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setMachineResources(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -22825,14 +22843,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setMachineType(params: any, options?: MethodOptions):
+  setMachineType(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setMachineType(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setMachineType(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -22886,14 +22904,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setMetadata(params: any, options?: MethodOptions):
+  setMetadata(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setMetadata(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setMetadata(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -22948,14 +22966,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setMinCpuPlatform(params: any, options?: MethodOptions):
+  setMinCpuPlatform(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setMinCpuPlatform(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setMinCpuPlatform(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -23008,14 +23026,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setScheduling(params: any, options?: MethodOptions):
+  setScheduling(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setScheduling(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setScheduling(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -23069,14 +23087,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setServiceAccount(params: any, options?: MethodOptions):
+  setServiceAccount(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setServiceAccount(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setServiceAccount(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -23131,14 +23149,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setShieldedVmIntegrityPolicy(params: any, options?: MethodOptions):
+  setShieldedVmIntegrityPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setShieldedVmIntegrityPolicy(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setShieldedVmIntegrityPolicy(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -23192,13 +23210,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setTags(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  setTags(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Operation>;
   setTags(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setTags(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -23249,14 +23268,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  simulateMaintenanceEvent(params: any, options?: MethodOptions):
+  simulateMaintenanceEvent(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   simulateMaintenanceEvent(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   simulateMaintenanceEvent(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -23309,13 +23328,13 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  start(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  start(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   start(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   start(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -23369,14 +23388,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  startWithEncryptionKey(params: any, options?: MethodOptions):
+  startWithEncryptionKey(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   startWithEncryptionKey(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   startWithEncryptionKey(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -23434,13 +23453,13 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  stop(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  stop(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   stop(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   stop(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -23498,13 +23517,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  suspend(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  suspend(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Operation>;
   suspend(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   suspend(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -23556,15 +23576,15 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -23621,14 +23641,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  updateAccessConfig(params: any, options?: MethodOptions):
+  updateAccessConfig(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   updateAccessConfig(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   updateAccessConfig(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -23683,14 +23703,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  updateNetworkInterface(params: any, options?: MethodOptions):
+  updateNetworkInterface(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   updateNetworkInterface(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   updateNetworkInterface(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -23744,14 +23764,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  updateShieldedVmConfig(params: any, options?: MethodOptions):
+  updateShieldedVmConfig(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   updateShieldedVmConfig(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   updateShieldedVmConfig(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -23816,13 +23836,13 @@ export class Resource$Instancetemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -23873,12 +23893,12 @@ export class Resource$Instancetemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$InstanceTemplate>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InstanceTemplate>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InstanceTemplate>,
       callback?: BodyResponseCallback<Schema$InstanceTemplate>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InstanceTemplate>,
       callback?: BodyResponseCallback<Schema$InstanceTemplate>):
       void|AxiosPromise<Schema$InstanceTemplate> {
@@ -23933,13 +23953,13 @@ export class Resource$Instancetemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -23992,14 +24012,14 @@ export class Resource$Instancetemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstanceTemplateList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InstanceTemplateList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InstanceTemplateList>,
       callback?: BodyResponseCallback<Schema$InstanceTemplateList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InstanceTemplateList>,
       callback?: BodyResponseCallback<Schema$InstanceTemplateList>):
       void|AxiosPromise<Schema$InstanceTemplateList> {
@@ -24049,15 +24069,15 @@ export class Resource$Instancetemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -24123,17 +24143,17 @@ export class Resource$Interconnectattachments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InterconnectAttachmentAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InterconnectAttachmentAggregatedList>,
       callback?:
           BodyResponseCallback<Schema$InterconnectAttachmentAggregatedList>):
       void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InterconnectAttachmentAggregatedList>,
       callback?:
@@ -24189,13 +24209,13 @@ export class Resource$Interconnectattachments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -24246,13 +24266,13 @@ export class Resource$Interconnectattachments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$InterconnectAttachment>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InterconnectAttachment>,
       callback?: BodyResponseCallback<Schema$InterconnectAttachment>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InterconnectAttachment>,
       callback?: BodyResponseCallback<Schema$InterconnectAttachment>):
@@ -24305,13 +24325,13 @@ export class Resource$Interconnectattachments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -24363,13 +24383,13 @@ export class Resource$Interconnectattachments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -24424,15 +24444,15 @@ export class Resource$Interconnectattachments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InterconnectAttachmentList>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InterconnectAttachmentList>,
       callback?: BodyResponseCallback<Schema$InterconnectAttachmentList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InterconnectAttachmentList>,
       callback?: BodyResponseCallback<Schema$InterconnectAttachmentList>):
@@ -24488,13 +24508,13 @@ export class Resource$Interconnectattachments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -24547,13 +24567,13 @@ export class Resource$Interconnectattachments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -24606,14 +24626,14 @@ export class Resource$Interconnectattachments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setLabels(params: any, options?: MethodOptions):
+  setLabels(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setLabels(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setLabels(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -24665,15 +24685,15 @@ export class Resource$Interconnectattachments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -24737,12 +24757,12 @@ export class Resource$Interconnectlocations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$InterconnectLocation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InterconnectLocation>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InterconnectLocation>,
       callback?: BodyResponseCallback<Schema$InterconnectLocation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InterconnectLocation>,
       callback?: BodyResponseCallback<Schema$InterconnectLocation>):
       void|AxiosPromise<Schema$InterconnectLocation> {
@@ -24796,15 +24816,15 @@ export class Resource$Interconnectlocations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InterconnectLocationList>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InterconnectLocationList>,
       callback?: BodyResponseCallback<Schema$InterconnectLocationList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InterconnectLocationList>,
       callback?: BodyResponseCallback<Schema$InterconnectLocationList>):
@@ -24856,15 +24876,15 @@ export class Resource$Interconnectlocations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -24928,13 +24948,13 @@ export class Resource$Interconnects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -24985,11 +25005,11 @@ export class Resource$Interconnects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Interconnect>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Interconnect>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Interconnect>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Interconnect>,
       callback?: BodyResponseCallback<Schema$Interconnect>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Interconnect>,
       callback?: BodyResponseCallback<Schema$Interconnect>):
       void|AxiosPromise<Schema$Interconnect> {
@@ -25040,13 +25060,13 @@ export class Resource$Interconnects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -25097,13 +25117,13 @@ export class Resource$Interconnects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -25156,14 +25176,14 @@ export class Resource$Interconnects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InterconnectList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InterconnectList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InterconnectList>,
       callback?: BodyResponseCallback<Schema$InterconnectList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InterconnectList>,
       callback?: BodyResponseCallback<Schema$InterconnectList>):
       void|AxiosPromise<Schema$InterconnectList> {
@@ -25216,13 +25236,13 @@ export class Resource$Interconnects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -25274,13 +25294,13 @@ export class Resource$Interconnects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -25331,14 +25351,14 @@ export class Resource$Interconnects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setLabels(params: any, options?: MethodOptions):
+  setLabels(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setLabels(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setLabels(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -25389,15 +25409,15 @@ export class Resource$Interconnects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -25461,11 +25481,11 @@ export class Resource$Licensecodes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$LicenseCode>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LicenseCode>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$LicenseCode>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LicenseCode>,
       callback?: BodyResponseCallback<Schema$LicenseCode>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LicenseCode>,
       callback?: BodyResponseCallback<Schema$LicenseCode>):
       void|AxiosPromise<Schema$LicenseCode> {
@@ -25516,13 +25536,13 @@ export class Resource$Licensecodes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -25573,13 +25593,13 @@ export class Resource$Licensecodes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -25629,15 +25649,15 @@ export class Resource$Licensecodes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -25701,13 +25721,13 @@ export class Resource$Licenses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -25756,10 +25776,12 @@ export class Resource$Licenses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$License>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$License>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$License>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$License>,
       callback?: BodyResponseCallback<Schema$License>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$License>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$License>,
       callback?: BodyResponseCallback<Schema$License>):
       void|AxiosPromise<Schema$License> {
     if (typeof options === 'function') {
@@ -25808,13 +25830,13 @@ export class Resource$Licenses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -25864,13 +25886,13 @@ export class Resource$Licenses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -25926,14 +25948,14 @@ export class Resource$Licenses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LicensesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LicensesListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LicensesListResponse>,
       callback?: BodyResponseCallback<Schema$LicensesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LicensesListResponse>,
       callback?: BodyResponseCallback<Schema$LicensesListResponse>):
       void|AxiosPromise<Schema$LicensesListResponse> {
@@ -25983,13 +26005,13 @@ export class Resource$Licenses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -26039,15 +26061,15 @@ export class Resource$Licenses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -26113,15 +26135,15 @@ export class Resource$Machinetypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$MachineTypeAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$MachineTypeAggregatedList>,
       callback?: BodyResponseCallback<Schema$MachineTypeAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$MachineTypeAggregatedList>,
       callback?: BodyResponseCallback<Schema$MachineTypeAggregatedList>):
@@ -26173,11 +26195,11 @@ export class Resource$Machinetypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$MachineType>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$MachineType>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$MachineType>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$MachineType>,
       callback?: BodyResponseCallback<Schema$MachineType>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$MachineType>,
       callback?: BodyResponseCallback<Schema$MachineType>):
       void|AxiosPromise<Schema$MachineType> {
@@ -26231,14 +26253,14 @@ export class Resource$Machinetypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$MachineTypeList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$MachineTypeList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$MachineTypeList>,
       callback?: BodyResponseCallback<Schema$MachineTypeList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$MachineTypeList>,
       callback?: BodyResponseCallback<Schema$MachineTypeList>):
       void|AxiosPromise<Schema$MachineTypeList> {
@@ -26302,16 +26324,16 @@ export class Resource$Maintenancepolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$MaintenancePolicyAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$MaintenancePolicyAggregatedList>,
       callback?: BodyResponseCallback<Schema$MaintenancePolicyAggregatedList>):
       void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$MaintenancePolicyAggregatedList>,
       callback?: BodyResponseCallback<Schema$MaintenancePolicyAggregatedList>):
@@ -26366,13 +26388,13 @@ export class Resource$Maintenancepolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -26423,12 +26445,12 @@ export class Resource$Maintenancepolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$MaintenancePolicy>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$MaintenancePolicy>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$MaintenancePolicy>,
       callback?: BodyResponseCallback<Schema$MaintenancePolicy>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$MaintenancePolicy>,
       callback?: BodyResponseCallback<Schema$MaintenancePolicy>):
       void|AxiosPromise<Schema$MaintenancePolicy> {
@@ -26480,13 +26502,13 @@ export class Resource$Maintenancepolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -26537,13 +26559,13 @@ export class Resource$Maintenancepolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -26598,15 +26620,15 @@ export class Resource$Maintenancepolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$MaintenancePoliciesList>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$MaintenancePoliciesList>,
       callback?: BodyResponseCallback<Schema$MaintenancePoliciesList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$MaintenancePoliciesList>,
       callback?: BodyResponseCallback<Schema$MaintenancePoliciesList>):
@@ -26660,13 +26682,13 @@ export class Resource$Maintenancepolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -26717,15 +26739,15 @@ export class Resource$Maintenancepolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -26791,17 +26813,17 @@ export class Resource$Networkendpointgroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$NetworkEndpointGroupAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$NetworkEndpointGroupAggregatedList>,
       callback?:
           BodyResponseCallback<Schema$NetworkEndpointGroupAggregatedList>):
       void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$NetworkEndpointGroupAggregatedList>,
       callback?:
@@ -26859,14 +26881,14 @@ export class Resource$Networkendpointgroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  attachNetworkEndpoints(params: any, options?: MethodOptions):
+  attachNetworkEndpoints(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   attachNetworkEndpoints(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   attachNetworkEndpoints(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -26921,13 +26943,13 @@ export class Resource$Networkendpointgroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -26981,14 +27003,14 @@ export class Resource$Networkendpointgroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  detachNetworkEndpoints(params: any, options?: MethodOptions):
+  detachNetworkEndpoints(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   detachNetworkEndpoints(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   detachNetworkEndpoints(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -27040,12 +27062,12 @@ export class Resource$Networkendpointgroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$NetworkEndpointGroup>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$NetworkEndpointGroup>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$NetworkEndpointGroup>,
       callback?: BodyResponseCallback<Schema$NetworkEndpointGroup>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$NetworkEndpointGroup>,
       callback?: BodyResponseCallback<Schema$NetworkEndpointGroup>):
       void|AxiosPromise<Schema$NetworkEndpointGroup> {
@@ -27098,13 +27120,13 @@ export class Resource$Networkendpointgroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -27159,15 +27181,15 @@ export class Resource$Networkendpointgroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$NetworkEndpointGroupList>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$NetworkEndpointGroupList>,
       callback?: BodyResponseCallback<Schema$NetworkEndpointGroupList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$NetworkEndpointGroupList>,
       callback?: BodyResponseCallback<Schema$NetworkEndpointGroupList>):
@@ -27224,16 +27246,16 @@ export class Resource$Networkendpointgroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listNetworkEndpoints(params: any, options?: MethodOptions):
+  listNetworkEndpoints(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$NetworkEndpointGroupsListNetworkEndpoints>;
   listNetworkEndpoints(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$NetworkEndpointGroupsListNetworkEndpoints>,
       callback?: BodyResponseCallback<
           Schema$NetworkEndpointGroupsListNetworkEndpoints>): void;
   listNetworkEndpoints(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$NetworkEndpointGroupsListNetworkEndpoints>,
       callback?: BodyResponseCallback<
@@ -27289,15 +27311,15 @@ export class Resource$Networkendpointgroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -27362,14 +27384,14 @@ export class Resource$Networks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  addPeering(params: any, options?: MethodOptions):
+  addPeering(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   addPeering(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   addPeering(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -27420,13 +27442,13 @@ export class Resource$Networks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -27476,10 +27498,12 @@ export class Resource$Networks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Network>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Network>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Network>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Network>,
       callback?: BodyResponseCallback<Schema$Network>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Network>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Network>,
       callback?: BodyResponseCallback<Schema$Network>):
       void|AxiosPromise<Schema$Network> {
     if (typeof options === 'function') {
@@ -27529,13 +27553,13 @@ export class Resource$Networks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -27586,13 +27610,13 @@ export class Resource$Networks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$NetworkList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$NetworkList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$NetworkList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$NetworkList>,
       callback?: BodyResponseCallback<Schema$NetworkList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$NetworkList>,
       callback?: BodyResponseCallback<Schema$NetworkList>):
       void|AxiosPromise<Schema$NetworkList> {
@@ -27649,14 +27673,14 @@ export class Resource$Networks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listIpOwners(params: any, options?: MethodOptions):
+  listIpOwners(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$IpOwnerList>;
   listIpOwners(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$IpOwnerList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$IpOwnerList>,
       callback?: BodyResponseCallback<Schema$IpOwnerList>): void;
   listIpOwners(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$IpOwnerList>,
       callback?: BodyResponseCallback<Schema$IpOwnerList>):
       void|AxiosPromise<Schema$IpOwnerList> {
@@ -27709,13 +27733,13 @@ export class Resource$Networks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -27766,14 +27790,14 @@ export class Resource$Networks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  removePeering(params: any, options?: MethodOptions):
+  removePeering(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   removePeering(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   removePeering(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -27825,14 +27849,14 @@ export class Resource$Networks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  switchToCustomMode(params: any, options?: MethodOptions):
+  switchToCustomMode(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   switchToCustomMode(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   switchToCustomMode(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -27883,15 +27907,15 @@ export class Resource$Networks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -27956,13 +27980,13 @@ export class Resource$Nodegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -28014,13 +28038,13 @@ export class Resource$Nodegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -28071,15 +28095,15 @@ export class Resource$Nodegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -28144,13 +28168,13 @@ export class Resource$Nodetemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -28202,13 +28226,13 @@ export class Resource$Nodetemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -28259,15 +28283,15 @@ export class Resource$Nodetemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -28330,14 +28354,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  disableXpnHost(params: any, options?: MethodOptions):
+  disableXpnHost(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   disableXpnHost(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   disableXpnHost(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -28387,14 +28411,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  disableXpnResource(params: any, options?: MethodOptions):
+  disableXpnResource(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   disableXpnResource(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   disableXpnResource(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -28443,14 +28467,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  enableXpnHost(params: any, options?: MethodOptions):
+  enableXpnHost(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   enableXpnHost(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   enableXpnHost(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -28501,14 +28525,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  enableXpnResource(params: any, options?: MethodOptions):
+  enableXpnResource(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   enableXpnResource(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   enableXpnResource(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -28556,10 +28580,12 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Project>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Project>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Project>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Project>,
       callback?: BodyResponseCallback<Schema$Project>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Project>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Project>,
       callback?: BodyResponseCallback<Schema$Project>):
       void|AxiosPromise<Schema$Project> {
     if (typeof options === 'function') {
@@ -28606,13 +28632,15 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getXpnHost(params: any, options?: MethodOptions):
+  getXpnHost(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Project>;
   getXpnHost(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Project>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Project>,
       callback?: BodyResponseCallback<Schema$Project>): void;
   getXpnHost(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Project>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Project>,
       callback?: BodyResponseCallback<Schema$Project>):
       void|AxiosPromise<Schema$Project> {
     if (typeof options === 'function') {
@@ -28663,15 +28691,15 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getXpnResources(params: any, options?: MethodOptions):
+  getXpnResources(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ProjectsGetXpnResources>;
   getXpnResources(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ProjectsGetXpnResources>,
       callback?: BodyResponseCallback<Schema$ProjectsGetXpnResources>): void;
   getXpnResources(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ProjectsGetXpnResources>,
       callback?: BodyResponseCallback<Schema$ProjectsGetXpnResources>):
@@ -28725,14 +28753,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listXpnHosts(params: any, options?: MethodOptions):
+  listXpnHosts(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$XpnHostList>;
   listXpnHosts(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$XpnHostList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$XpnHostList>,
       callback?: BodyResponseCallback<Schema$XpnHostList>): void;
   listXpnHosts(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$XpnHostList>,
       callback?: BodyResponseCallback<Schema$XpnHostList>):
       void|AxiosPromise<Schema$XpnHostList> {
@@ -28781,14 +28809,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  moveDisk(params: any, options?: MethodOptions):
+  moveDisk(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   moveDisk(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   moveDisk(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -28838,14 +28866,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  moveInstance(params: any, options?: MethodOptions):
+  moveInstance(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   moveInstance(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   moveInstance(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -28895,14 +28923,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setCommonInstanceMetadata(params: any, options?: MethodOptions):
+  setCommonInstanceMetadata(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setCommonInstanceMetadata(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setCommonInstanceMetadata(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -28954,14 +28982,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setDefaultNetworkTier(params: any, options?: MethodOptions):
+  setDefaultNetworkTier(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setDefaultNetworkTier(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setDefaultNetworkTier(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -29013,14 +29041,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setDefaultServiceAccount(params: any, options?: MethodOptions):
+  setDefaultServiceAccount(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setDefaultServiceAccount(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setDefaultServiceAccount(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -29072,14 +29100,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setUsageExportBucket(params: any, options?: MethodOptions):
+  setUsageExportBucket(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setUsageExportBucket(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setUsageExportBucket(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -29142,13 +29170,13 @@ export class Resource$Regionautoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -29199,11 +29227,11 @@ export class Resource$Regionautoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Autoscaler>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Autoscaler>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Autoscaler>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Autoscaler>,
       callback?: BodyResponseCallback<Schema$Autoscaler>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Autoscaler>,
       callback?: BodyResponseCallback<Schema$Autoscaler>):
       void|AxiosPromise<Schema$Autoscaler> {
@@ -29256,13 +29284,13 @@ export class Resource$Regionautoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -29317,14 +29345,14 @@ export class Resource$Regionautoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RegionAutoscalerList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RegionAutoscalerList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RegionAutoscalerList>,
       callback?: BodyResponseCallback<Schema$RegionAutoscalerList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RegionAutoscalerList>,
       callback?: BodyResponseCallback<Schema$RegionAutoscalerList>):
       void|AxiosPromise<Schema$RegionAutoscalerList> {
@@ -29379,13 +29407,13 @@ export class Resource$Regionautoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -29437,15 +29465,15 @@ export class Resource$Regionautoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -29500,13 +29528,13 @@ export class Resource$Regionautoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -29570,13 +29598,13 @@ export class Resource$Regionbackendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -29627,12 +29655,12 @@ export class Resource$Regionbackendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$BackendService>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BackendService>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BackendService>,
       callback?: BodyResponseCallback<Schema$BackendService>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BackendService>,
       callback?: BodyResponseCallback<Schema$BackendService>):
       void|AxiosPromise<Schema$BackendService> {
@@ -29685,15 +29713,15 @@ export class Resource$Regionbackendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getHealth(params: any, options?: MethodOptions):
+  getHealth(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BackendServiceGroupHealth>;
   getHealth(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$BackendServiceGroupHealth>,
       callback?: BodyResponseCallback<Schema$BackendServiceGroupHealth>): void;
   getHealth(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$BackendServiceGroupHealth>,
       callback?: BodyResponseCallback<Schema$BackendServiceGroupHealth>):
@@ -29749,13 +29777,13 @@ export class Resource$Regionbackendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -29810,14 +29838,14 @@ export class Resource$Regionbackendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BackendServiceList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BackendServiceList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BackendServiceList>,
       callback?: BodyResponseCallback<Schema$BackendServiceList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BackendServiceList>,
       callback?: BodyResponseCallback<Schema$BackendServiceList>):
       void|AxiosPromise<Schema$BackendServiceList> {
@@ -29874,13 +29902,13 @@ export class Resource$Regionbackendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -29932,15 +29960,15 @@ export class Resource$Regionbackendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -29997,13 +30025,13 @@ export class Resource$Regionbackendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -30068,15 +30096,15 @@ export class Resource$Regioncommitments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CommitmentAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$CommitmentAggregatedList>,
       callback?: BodyResponseCallback<Schema$CommitmentAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$CommitmentAggregatedList>,
       callback?: BodyResponseCallback<Schema$CommitmentAggregatedList>):
@@ -30128,11 +30156,11 @@ export class Resource$Regioncommitments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Commitment>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Commitment>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Commitment>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Commitment>,
       callback?: BodyResponseCallback<Schema$Commitment>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Commitment>,
       callback?: BodyResponseCallback<Schema$Commitment>):
       void|AxiosPromise<Schema$Commitment> {
@@ -30185,13 +30213,13 @@ export class Resource$Regioncommitments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -30246,14 +30274,14 @@ export class Resource$Regioncommitments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CommitmentList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CommitmentList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CommitmentList>,
       callback?: BodyResponseCallback<Schema$CommitmentList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CommitmentList>,
       callback?: BodyResponseCallback<Schema$CommitmentList>):
       void|AxiosPromise<Schema$CommitmentList> {
@@ -30305,15 +30333,15 @@ export class Resource$Regioncommitments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -30380,14 +30408,14 @@ export class Resource$Regiondisks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  createSnapshot(params: any, options?: MethodOptions):
+  createSnapshot(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   createSnapshot(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   createSnapshot(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -30442,13 +30470,13 @@ export class Resource$Regiondisks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -30499,10 +30527,10 @@ export class Resource$Regiondisks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Disk>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Disk>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Disk>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Disk>,
       callback?: BodyResponseCallback<Schema$Disk>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Disk>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Disk>,
       callback?: BodyResponseCallback<Schema$Disk>):
       void|AxiosPromise<Schema$Disk> {
     if (typeof options === 'function') {
@@ -30555,13 +30583,13 @@ export class Resource$Regiondisks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -30615,12 +30643,13 @@ export class Resource$Regiondisks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$DiskList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$DiskList>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$DiskList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DiskList>,
       callback?: BodyResponseCallback<Schema$DiskList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DiskList>,
       callback?: BodyResponseCallback<Schema$DiskList>):
       void|AxiosPromise<Schema$DiskList> {
@@ -30672,13 +30701,13 @@ export class Resource$Regiondisks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resize(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  resize(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   resize(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   resize(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -30731,14 +30760,14 @@ export class Resource$Regiondisks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setLabels(params: any, options?: MethodOptions):
+  setLabels(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setLabels(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setLabels(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -30790,15 +30819,15 @@ export class Resource$Regiondisks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -30863,10 +30892,11 @@ export class Resource$Regiondisktypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$DiskType>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$DiskType>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$DiskType>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DiskType>,
       callback?: BodyResponseCallback<Schema$DiskType>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DiskType>,
       callback?: BodyResponseCallback<Schema$DiskType>):
       void|AxiosPromise<Schema$DiskType> {
@@ -30921,14 +30951,14 @@ export class Resource$Regiondisktypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RegionDiskTypeList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RegionDiskTypeList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RegionDiskTypeList>,
       callback?: BodyResponseCallback<Schema$RegionDiskTypeList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RegionDiskTypeList>,
       callback?: BodyResponseCallback<Schema$RegionDiskTypeList>):
       void|AxiosPromise<Schema$RegionDiskTypeList> {
@@ -30992,13 +31022,13 @@ export class Resource$Regionhealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -31050,11 +31080,11 @@ export class Resource$Regionhealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$HealthCheck>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$HealthCheck>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$HealthCheck>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$HealthCheck>,
       callback?: BodyResponseCallback<Schema$HealthCheck>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$HealthCheck>,
       callback?: BodyResponseCallback<Schema$HealthCheck>):
       void|AxiosPromise<Schema$HealthCheck> {
@@ -31107,13 +31137,13 @@ export class Resource$Regionhealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -31168,14 +31198,14 @@ export class Resource$Regionhealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$HealthCheckList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$HealthCheckList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$HealthCheckList>,
       callback?: BodyResponseCallback<Schema$HealthCheckList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$HealthCheckList>,
       callback?: BodyResponseCallback<Schema$HealthCheckList>):
       void|AxiosPromise<Schema$HealthCheckList> {
@@ -31230,13 +31260,13 @@ export class Resource$Regionhealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -31288,15 +31318,15 @@ export class Resource$Regionhealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -31351,13 +31381,13 @@ export class Resource$Regionhealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -31433,14 +31463,14 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  abandonInstances(params: any, options?: MethodOptions):
+  abandonInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   abandonInstances(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   abandonInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -31492,14 +31522,14 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  applyUpdatesToInstances(params: any, options?: MethodOptions):
+  applyUpdatesToInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   applyUpdatesToInstances(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   applyUpdatesToInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -31552,13 +31582,13 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -31621,14 +31651,14 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  deleteInstances(params: any, options?: MethodOptions):
+  deleteInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   deleteInstances(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   deleteInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -31680,14 +31710,14 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  deletePerInstanceConfigs(params: any, options?: MethodOptions):
+  deletePerInstanceConfigs(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   deletePerInstanceConfigs(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   deletePerInstanceConfigs(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -31739,12 +31769,12 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$InstanceGroupManager>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InstanceGroupManager>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InstanceGroupManager>,
       callback?: BodyResponseCallback<Schema$InstanceGroupManager>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InstanceGroupManager>,
       callback?: BodyResponseCallback<Schema$InstanceGroupManager>):
       void|AxiosPromise<Schema$InstanceGroupManager> {
@@ -31803,13 +31833,13 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -31864,16 +31894,16 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RegionInstanceGroupManagerList>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$RegionInstanceGroupManagerList>,
       callback?: BodyResponseCallback<Schema$RegionInstanceGroupManagerList>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$RegionInstanceGroupManagerList>,
       callback?: BodyResponseCallback<Schema$RegionInstanceGroupManagerList>):
@@ -31933,16 +31963,16 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listManagedInstances(params: any, options?: MethodOptions):
+  listManagedInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RegionInstanceGroupManagersListInstancesResponse>;
   listManagedInstances(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$RegionInstanceGroupManagersListInstancesResponse>,
       callback?: BodyResponseCallback<
           Schema$RegionInstanceGroupManagersListInstancesResponse>): void;
   listManagedInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$RegionInstanceGroupManagersListInstancesResponse>,
       callback?: BodyResponseCallback<
@@ -32002,16 +32032,16 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listPerInstanceConfigs(params: any, options?: MethodOptions):
+  listPerInstanceConfigs(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RegionInstanceGroupManagersListInstanceConfigsResp>;
   listPerInstanceConfigs(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$RegionInstanceGroupManagersListInstanceConfigsResp>,
       callback?: BodyResponseCallback<
           Schema$RegionInstanceGroupManagersListInstanceConfigsResp>): void;
   listPerInstanceConfigs(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$RegionInstanceGroupManagersListInstanceConfigsResp>,
       callback?: BodyResponseCallback<
@@ -32075,13 +32105,13 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -32143,14 +32173,14 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  recreateInstances(params: any, options?: MethodOptions):
+  recreateInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   recreateInstances(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   recreateInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -32212,13 +32242,13 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resize(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  resize(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   resize(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   resize(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -32272,14 +32302,14 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setAutoHealingPolicies(params: any, options?: MethodOptions):
+  setAutoHealingPolicies(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setAutoHealingPolicies(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setAutoHealingPolicies(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -32333,14 +32363,14 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setInstanceTemplate(params: any, options?: MethodOptions):
+  setInstanceTemplate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setInstanceTemplate(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setInstanceTemplate(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -32394,14 +32424,14 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setTargetPools(params: any, options?: MethodOptions):
+  setTargetPools(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setTargetPools(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setTargetPools(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -32453,15 +32483,15 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -32519,13 +32549,13 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -32579,14 +32609,14 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  updatePerInstanceConfigs(params: any, options?: MethodOptions):
+  updatePerInstanceConfigs(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   updatePerInstanceConfigs(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   updatePerInstanceConfigs(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -32649,11 +32679,12 @@ export class Resource$Regioninstancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$InstanceGroup>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InstanceGroup>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$InstanceGroup>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InstanceGroup>,
       callback?: BodyResponseCallback<Schema$InstanceGroup>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InstanceGroup>,
       callback?: BodyResponseCallback<Schema$InstanceGroup>):
       void|AxiosPromise<Schema$InstanceGroup> {
@@ -32708,15 +32739,15 @@ export class Resource$Regioninstancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RegionInstanceGroupList>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$RegionInstanceGroupList>,
       callback?: BodyResponseCallback<Schema$RegionInstanceGroupList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$RegionInstanceGroupList>,
       callback?: BodyResponseCallback<Schema$RegionInstanceGroupList>):
@@ -32775,16 +32806,16 @@ export class Resource$Regioninstancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listInstances(params: any, options?: MethodOptions):
+  listInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RegionInstanceGroupsListInstances>;
   listInstances(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$RegionInstanceGroupsListInstances>,
       callback?:
           BodyResponseCallback<Schema$RegionInstanceGroupsListInstances>): void;
   listInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$RegionInstanceGroupsListInstances>,
       callback?:
@@ -32841,14 +32872,14 @@ export class Resource$Regioninstancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setNamedPorts(params: any, options?: MethodOptions):
+  setNamedPorts(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setNamedPorts(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setNamedPorts(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -32900,15 +32931,15 @@ export class Resource$Regioninstancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -32972,12 +33003,12 @@ export class Resource$Regionoperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -33026,11 +33057,11 @@ export class Resource$Regionoperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -33085,14 +33116,14 @@ export class Resource$Regionoperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OperationList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$OperationList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OperationList>,
       callback?: BodyResponseCallback<Schema$OperationList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$OperationList>,
       callback?: BodyResponseCallback<Schema$OperationList>):
       void|AxiosPromise<Schema$OperationList> {
@@ -33155,10 +33186,10 @@ export class Resource$Regions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Region>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Region>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Region>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Region>,
       callback?: BodyResponseCallback<Schema$Region>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Region>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Region>,
       callback?: BodyResponseCallback<Schema$Region>):
       void|AxiosPromise<Schema$Region> {
     if (typeof options === 'function') {
@@ -33210,13 +33241,13 @@ export class Resource$Regions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$RegionList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$RegionList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RegionList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RegionList>,
       callback?: BodyResponseCallback<Schema$RegionList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RegionList>,
       callback?: BodyResponseCallback<Schema$RegionList>):
       void|AxiosPromise<Schema$RegionList> {
@@ -33278,13 +33309,13 @@ export class Resource$Regiontargethttpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -33337,12 +33368,12 @@ export class Resource$Regiontargethttpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$TargetHttpProxy>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetHttpProxy>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetHttpProxy>,
       callback?: BodyResponseCallback<Schema$TargetHttpProxy>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetHttpProxy>,
       callback?: BodyResponseCallback<Schema$TargetHttpProxy>):
       void|AxiosPromise<Schema$TargetHttpProxy> {
@@ -33395,13 +33426,13 @@ export class Resource$Regiontargethttpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -33456,14 +33487,14 @@ export class Resource$Regiontargethttpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetHttpProxyList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetHttpProxyList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetHttpProxyList>,
       callback?: BodyResponseCallback<Schema$TargetHttpProxyList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetHttpProxyList>,
       callback?: BodyResponseCallback<Schema$TargetHttpProxyList>):
       void|AxiosPromise<Schema$TargetHttpProxyList> {
@@ -33516,14 +33547,14 @@ export class Resource$Regiontargethttpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setUrlMap(params: any, options?: MethodOptions):
+  setUrlMap(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setUrlMap(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setUrlMap(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -33575,15 +33606,15 @@ export class Resource$Regiontargethttpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -33648,13 +33679,13 @@ export class Resource$Regionurlmaps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -33706,10 +33737,10 @@ export class Resource$Regionurlmaps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$UrlMap>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$UrlMap>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$UrlMap>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$UrlMap>,
       callback?: BodyResponseCallback<Schema$UrlMap>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$UrlMap>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$UrlMap>,
       callback?: BodyResponseCallback<Schema$UrlMap>):
       void|AxiosPromise<Schema$UrlMap> {
     if (typeof options === 'function') {
@@ -33760,13 +33791,13 @@ export class Resource$Regionurlmaps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -33820,13 +33851,13 @@ export class Resource$Regionurlmaps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$UrlMapList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$UrlMapList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UrlMapList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UrlMapList>,
       callback?: BodyResponseCallback<Schema$UrlMapList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UrlMapList>,
       callback?: BodyResponseCallback<Schema$UrlMapList>):
       void|AxiosPromise<Schema$UrlMapList> {
@@ -33879,13 +33910,13 @@ export class Resource$Regionurlmaps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -33937,15 +33968,15 @@ export class Resource$Regionurlmaps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -33999,13 +34030,13 @@ export class Resource$Regionurlmaps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -34059,15 +34090,15 @@ export class Resource$Regionurlmaps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  validate(params: any, options?: MethodOptions):
+  validate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$UrlMapsValidateResponse>;
   validate(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$UrlMapsValidateResponse>,
       callback?: BodyResponseCallback<Schema$UrlMapsValidateResponse>): void;
   validate(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$UrlMapsValidateResponse>,
       callback?: BodyResponseCallback<Schema$UrlMapsValidateResponse>):
@@ -34133,14 +34164,14 @@ export class Resource$Routers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RouterAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RouterAggregatedList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RouterAggregatedList>,
       callback?: BodyResponseCallback<Schema$RouterAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RouterAggregatedList>,
       callback?: BodyResponseCallback<Schema$RouterAggregatedList>):
       void|AxiosPromise<Schema$RouterAggregatedList> {
@@ -34191,13 +34222,13 @@ export class Resource$Routers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -34249,10 +34280,10 @@ export class Resource$Routers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Router>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Router>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Router>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Router>,
       callback?: BodyResponseCallback<Schema$Router>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Router>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Router>,
       callback?: BodyResponseCallback<Schema$Router>):
       void|AxiosPromise<Schema$Router> {
     if (typeof options === 'function') {
@@ -34302,14 +34333,14 @@ export class Resource$Routers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getRouterStatus(params: any, options?: MethodOptions):
+  getRouterStatus(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RouterStatusResponse>;
   getRouterStatus(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RouterStatusResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RouterStatusResponse>,
       callback?: BodyResponseCallback<Schema$RouterStatusResponse>): void;
   getRouterStatus(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RouterStatusResponse>,
       callback?: BodyResponseCallback<Schema$RouterStatusResponse>):
       void|AxiosPromise<Schema$RouterStatusResponse> {
@@ -34362,13 +34393,13 @@ export class Resource$Routers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -34422,13 +34453,13 @@ export class Resource$Routers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$RouterList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$RouterList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RouterList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RouterList>,
       callback?: BodyResponseCallback<Schema$RouterList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RouterList>,
       callback?: BodyResponseCallback<Schema$RouterList>):
       void|AxiosPromise<Schema$RouterList> {
@@ -34482,13 +34513,13 @@ export class Resource$Routers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -34541,15 +34572,15 @@ export class Resource$Routers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  preview(params: any, options?: MethodOptions):
+  preview(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RoutersPreviewResponse>;
   preview(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$RoutersPreviewResponse>,
       callback?: BodyResponseCallback<Schema$RoutersPreviewResponse>): void;
   preview(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$RoutersPreviewResponse>,
       callback?: BodyResponseCallback<Schema$RoutersPreviewResponse>):
@@ -34602,15 +34633,15 @@ export class Resource$Routers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -34665,13 +34696,13 @@ export class Resource$Routers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -34734,13 +34765,13 @@ export class Resource$Routes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -34790,10 +34821,10 @@ export class Resource$Routes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Route>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Route>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Route>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Route>,
       callback?: BodyResponseCallback<Schema$Route>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Route>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Route>,
       callback?: BodyResponseCallback<Schema$Route>):
       void|AxiosPromise<Schema$Route> {
     if (typeof options === 'function') {
@@ -34843,13 +34874,13 @@ export class Resource$Routes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -34901,13 +34932,13 @@ export class Resource$Routes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$RouteList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$RouteList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RouteList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RouteList>,
       callback?: BodyResponseCallback<Schema$RouteList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RouteList>,
       callback?: BodyResponseCallback<Schema$RouteList>):
       void|AxiosPromise<Schema$RouteList> {
@@ -34956,15 +34987,15 @@ export class Resource$Routes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -35029,13 +35060,14 @@ export class Resource$Securitypolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  addRule(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  addRule(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Operation>;
   addRule(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   addRule(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -35086,13 +35118,13 @@ export class Resource$Securitypolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -35142,12 +35174,12 @@ export class Resource$Securitypolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$SecurityPolicy>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SecurityPolicy>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SecurityPolicy>,
       callback?: BodyResponseCallback<Schema$SecurityPolicy>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SecurityPolicy>,
       callback?: BodyResponseCallback<Schema$SecurityPolicy>):
       void|AxiosPromise<Schema$SecurityPolicy> {
@@ -35198,14 +35230,14 @@ export class Resource$Securitypolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getRule(params: any, options?: MethodOptions):
+  getRule(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SecurityPolicyRule>;
   getRule(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SecurityPolicyRule>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SecurityPolicyRule>,
       callback?: BodyResponseCallback<Schema$SecurityPolicyRule>): void;
   getRule(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SecurityPolicyRule>,
       callback?: BodyResponseCallback<Schema$SecurityPolicyRule>):
       void|AxiosPromise<Schema$SecurityPolicyRule> {
@@ -35258,13 +35290,13 @@ export class Resource$Securitypolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -35317,14 +35349,14 @@ export class Resource$Securitypolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SecurityPolicyList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SecurityPolicyList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SecurityPolicyList>,
       callback?: BodyResponseCallback<Schema$SecurityPolicyList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SecurityPolicyList>,
       callback?: BodyResponseCallback<Schema$SecurityPolicyList>):
       void|AxiosPromise<Schema$SecurityPolicyList> {
@@ -35375,13 +35407,13 @@ export class Resource$Securitypolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -35434,14 +35466,14 @@ export class Resource$Securitypolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patchRule(params: any, options?: MethodOptions):
+  patchRule(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   patchRule(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patchRule(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -35492,14 +35524,14 @@ export class Resource$Securitypolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  removeRule(params: any, options?: MethodOptions):
+  removeRule(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   removeRule(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   removeRule(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -35550,15 +35582,15 @@ export class Resource$Securitypolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -35626,13 +35658,13 @@ export class Resource$Snapshots {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -35683,10 +35715,11 @@ export class Resource$Snapshots {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Snapshot>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Snapshot>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Snapshot>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Snapshot>,
       callback?: BodyResponseCallback<Schema$Snapshot>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Snapshot>,
       callback?: BodyResponseCallback<Schema$Snapshot>):
       void|AxiosPromise<Schema$Snapshot> {
@@ -35737,13 +35770,13 @@ export class Resource$Snapshots {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -35796,13 +35829,14 @@ export class Resource$Snapshots {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$SnapshotList>;
+  list(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$SnapshotList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SnapshotList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SnapshotList>,
       callback?: BodyResponseCallback<Schema$SnapshotList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SnapshotList>,
       callback?: BodyResponseCallback<Schema$SnapshotList>):
       void|AxiosPromise<Schema$SnapshotList> {
@@ -35853,13 +35887,13 @@ export class Resource$Snapshots {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -35910,14 +35944,14 @@ export class Resource$Snapshots {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setLabels(params: any, options?: MethodOptions):
+  setLabels(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setLabels(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setLabels(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -35968,15 +36002,15 @@ export class Resource$Snapshots {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -36040,13 +36074,13 @@ export class Resource$Sslcertificates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -36097,12 +36131,12 @@ export class Resource$Sslcertificates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$SslCertificate>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SslCertificate>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SslCertificate>,
       callback?: BodyResponseCallback<Schema$SslCertificate>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SslCertificate>,
       callback?: BodyResponseCallback<Schema$SslCertificate>):
       void|AxiosPromise<Schema$SslCertificate> {
@@ -36154,13 +36188,13 @@ export class Resource$Sslcertificates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -36213,14 +36247,14 @@ export class Resource$Sslcertificates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SslCertificateList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SslCertificateList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SslCertificateList>,
       callback?: BodyResponseCallback<Schema$SslCertificateList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SslCertificateList>,
       callback?: BodyResponseCallback<Schema$SslCertificateList>):
       void|AxiosPromise<Schema$SslCertificateList> {
@@ -36270,15 +36304,15 @@ export class Resource$Sslcertificates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -36344,13 +36378,13 @@ export class Resource$Sslpolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -36400,11 +36434,11 @@ export class Resource$Sslpolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$SslPolicy>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SslPolicy>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$SslPolicy>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SslPolicy>,
       callback?: BodyResponseCallback<Schema$SslPolicy>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SslPolicy>,
       callback?: BodyResponseCallback<Schema$SslPolicy>):
       void|AxiosPromise<Schema$SslPolicy> {
@@ -36456,13 +36490,13 @@ export class Resource$Sslpolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -36515,14 +36549,14 @@ export class Resource$Sslpolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SslPoliciesList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SslPoliciesList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SslPoliciesList>,
       callback?: BodyResponseCallback<Schema$SslPoliciesList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SslPoliciesList>,
       callback?: BodyResponseCallback<Schema$SslPoliciesList>):
       void|AxiosPromise<Schema$SslPoliciesList> {
@@ -36575,16 +36609,16 @@ export class Resource$Sslpolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listAvailableFeatures(params: any, options?: MethodOptions):
+  listAvailableFeatures(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SslPoliciesListAvailableFeaturesResponse>;
   listAvailableFeatures(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SslPoliciesListAvailableFeaturesResponse>,
       callback?: BodyResponseCallback<
           Schema$SslPoliciesListAvailableFeaturesResponse>): void;
   listAvailableFeatures(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SslPoliciesListAvailableFeaturesResponse>,
       callback?: BodyResponseCallback<
@@ -36641,13 +36675,13 @@ export class Resource$Sslpolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -36698,15 +36732,15 @@ export class Resource$Sslpolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -36772,15 +36806,15 @@ export class Resource$Subnetworks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SubnetworkAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SubnetworkAggregatedList>,
       callback?: BodyResponseCallback<Schema$SubnetworkAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SubnetworkAggregatedList>,
       callback?: BodyResponseCallback<Schema$SubnetworkAggregatedList>):
@@ -36832,13 +36866,13 @@ export class Resource$Subnetworks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -36891,14 +36925,14 @@ export class Resource$Subnetworks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  expandIpCidrRange(params: any, options?: MethodOptions):
+  expandIpCidrRange(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   expandIpCidrRange(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   expandIpCidrRange(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -36950,11 +36984,11 @@ export class Resource$Subnetworks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Subnetwork>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Subnetwork>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Subnetwork>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Subnetwork>,
       callback?: BodyResponseCallback<Schema$Subnetwork>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Subnetwork>,
       callback?: BodyResponseCallback<Schema$Subnetwork>):
       void|AxiosPromise<Schema$Subnetwork> {
@@ -37006,13 +37040,13 @@ export class Resource$Subnetworks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -37064,13 +37098,13 @@ export class Resource$Subnetworks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -37124,14 +37158,14 @@ export class Resource$Subnetworks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SubnetworkList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SubnetworkList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SubnetworkList>,
       callback?: BodyResponseCallback<Schema$SubnetworkList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SubnetworkList>,
       callback?: BodyResponseCallback<Schema$SubnetworkList>):
       void|AxiosPromise<Schema$SubnetworkList> {
@@ -37184,16 +37218,16 @@ export class Resource$Subnetworks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listUsable(params: any, options?: MethodOptions):
+  listUsable(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$UsableSubnetworksAggregatedList>;
   listUsable(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$UsableSubnetworksAggregatedList>,
       callback?: BodyResponseCallback<Schema$UsableSubnetworksAggregatedList>):
       void;
   listUsable(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$UsableSubnetworksAggregatedList>,
       callback?: BodyResponseCallback<Schema$UsableSubnetworksAggregatedList>):
@@ -37253,13 +37287,13 @@ export class Resource$Subnetworks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -37312,13 +37346,13 @@ export class Resource$Subnetworks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -37371,14 +37405,14 @@ export class Resource$Subnetworks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setPrivateIpGoogleAccess(params: any, options?: MethodOptions):
+  setPrivateIpGoogleAccess(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setPrivateIpGoogleAccess(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setPrivateIpGoogleAccess(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -37430,15 +37464,15 @@ export class Resource$Subnetworks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -37505,16 +37539,16 @@ export class Resource$Targethttpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetHttpProxyAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TargetHttpProxyAggregatedList>,
       callback?: BodyResponseCallback<Schema$TargetHttpProxyAggregatedList>):
       void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TargetHttpProxyAggregatedList>,
       callback?: BodyResponseCallback<Schema$TargetHttpProxyAggregatedList>):
@@ -37567,13 +37601,13 @@ export class Resource$Targethttpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -37624,12 +37658,12 @@ export class Resource$Targethttpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$TargetHttpProxy>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetHttpProxy>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetHttpProxy>,
       callback?: BodyResponseCallback<Schema$TargetHttpProxy>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetHttpProxy>,
       callback?: BodyResponseCallback<Schema$TargetHttpProxy>):
       void|AxiosPromise<Schema$TargetHttpProxy> {
@@ -37681,13 +37715,13 @@ export class Resource$Targethttpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -37740,14 +37774,14 @@ export class Resource$Targethttpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetHttpProxyList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetHttpProxyList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetHttpProxyList>,
       callback?: BodyResponseCallback<Schema$TargetHttpProxyList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetHttpProxyList>,
       callback?: BodyResponseCallback<Schema$TargetHttpProxyList>):
       void|AxiosPromise<Schema$TargetHttpProxyList> {
@@ -37798,14 +37832,14 @@ export class Resource$Targethttpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setUrlMap(params: any, options?: MethodOptions):
+  setUrlMap(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setUrlMap(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setUrlMap(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -37856,15 +37890,15 @@ export class Resource$Targethttpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -37928,13 +37962,13 @@ export class Resource$Targethttpsproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -37985,12 +38019,12 @@ export class Resource$Targethttpsproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$TargetHttpsProxy>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetHttpsProxy>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetHttpsProxy>,
       callback?: BodyResponseCallback<Schema$TargetHttpsProxy>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetHttpsProxy>,
       callback?: BodyResponseCallback<Schema$TargetHttpsProxy>):
       void|AxiosPromise<Schema$TargetHttpsProxy> {
@@ -38042,13 +38076,13 @@ export class Resource$Targethttpsproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -38101,14 +38135,14 @@ export class Resource$Targethttpsproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetHttpsProxyList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetHttpsProxyList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetHttpsProxyList>,
       callback?: BodyResponseCallback<Schema$TargetHttpsProxyList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetHttpsProxyList>,
       callback?: BodyResponseCallback<Schema$TargetHttpsProxyList>):
       void|AxiosPromise<Schema$TargetHttpsProxyList> {
@@ -38159,14 +38193,14 @@ export class Resource$Targethttpsproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setQuicOverride(params: any, options?: MethodOptions):
+  setQuicOverride(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setQuicOverride(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setQuicOverride(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -38218,14 +38252,14 @@ export class Resource$Targethttpsproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setSslCertificates(params: any, options?: MethodOptions):
+  setSslCertificates(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setSslCertificates(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setSslCertificates(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -38280,14 +38314,14 @@ export class Resource$Targethttpsproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setSslPolicy(params: any, options?: MethodOptions):
+  setSslPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setSslPolicy(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setSslPolicy(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -38339,14 +38373,14 @@ export class Resource$Targethttpsproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setUrlMap(params: any, options?: MethodOptions):
+  setUrlMap(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setUrlMap(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setUrlMap(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -38397,15 +38431,15 @@ export class Resource$Targethttpsproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -38471,16 +38505,16 @@ export class Resource$Targetinstances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetInstanceAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TargetInstanceAggregatedList>,
       callback?: BodyResponseCallback<Schema$TargetInstanceAggregatedList>):
       void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TargetInstanceAggregatedList>,
       callback?: BodyResponseCallback<Schema$TargetInstanceAggregatedList>):
@@ -38534,13 +38568,13 @@ export class Resource$Targetinstances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -38592,12 +38626,12 @@ export class Resource$Targetinstances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$TargetInstance>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetInstance>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetInstance>,
       callback?: BodyResponseCallback<Schema$TargetInstance>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetInstance>,
       callback?: BodyResponseCallback<Schema$TargetInstance>):
       void|AxiosPromise<Schema$TargetInstance> {
@@ -38650,13 +38684,13 @@ export class Resource$Targetinstances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -38711,14 +38745,14 @@ export class Resource$Targetinstances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetInstanceList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetInstanceList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetInstanceList>,
       callback?: BodyResponseCallback<Schema$TargetInstanceList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetInstanceList>,
       callback?: BodyResponseCallback<Schema$TargetInstanceList>):
       void|AxiosPromise<Schema$TargetInstanceList> {
@@ -38770,15 +38804,15 @@ export class Resource$Targetinstances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -38844,14 +38878,14 @@ export class Resource$Targetpools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  addHealthCheck(params: any, options?: MethodOptions):
+  addHealthCheck(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   addHealthCheck(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   addHealthCheck(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -38904,14 +38938,14 @@ export class Resource$Targetpools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  addInstance(params: any, options?: MethodOptions):
+  addInstance(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   addInstance(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   addInstance(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -38964,15 +38998,15 @@ export class Resource$Targetpools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetPoolAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TargetPoolAggregatedList>,
       callback?: BodyResponseCallback<Schema$TargetPoolAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TargetPoolAggregatedList>,
       callback?: BodyResponseCallback<Schema$TargetPoolAggregatedList>):
@@ -39024,13 +39058,13 @@ export class Resource$Targetpools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -39082,11 +39116,11 @@ export class Resource$Targetpools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$TargetPool>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetPool>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$TargetPool>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetPool>,
       callback?: BodyResponseCallback<Schema$TargetPool>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetPool>,
       callback?: BodyResponseCallback<Schema$TargetPool>):
       void|AxiosPromise<Schema$TargetPool> {
@@ -39139,15 +39173,15 @@ export class Resource$Targetpools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getHealth(params: any, options?: MethodOptions):
+  getHealth(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetPoolInstanceHealth>;
   getHealth(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TargetPoolInstanceHealth>,
       callback?: BodyResponseCallback<Schema$TargetPoolInstanceHealth>): void;
   getHealth(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TargetPoolInstanceHealth>,
       callback?: BodyResponseCallback<Schema$TargetPoolInstanceHealth>):
@@ -39201,13 +39235,13 @@ export class Resource$Targetpools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -39262,14 +39296,14 @@ export class Resource$Targetpools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetPoolList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetPoolList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetPoolList>,
       callback?: BodyResponseCallback<Schema$TargetPoolList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetPoolList>,
       callback?: BodyResponseCallback<Schema$TargetPoolList>):
       void|AxiosPromise<Schema$TargetPoolList> {
@@ -39322,14 +39356,14 @@ export class Resource$Targetpools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  removeHealthCheck(params: any, options?: MethodOptions):
+  removeHealthCheck(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   removeHealthCheck(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   removeHealthCheck(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -39382,14 +39416,14 @@ export class Resource$Targetpools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  removeInstance(params: any, options?: MethodOptions):
+  removeInstance(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   removeInstance(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   removeInstance(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -39443,14 +39477,14 @@ export class Resource$Targetpools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setBackup(params: any, options?: MethodOptions):
+  setBackup(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setBackup(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setBackup(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -39502,15 +39536,15 @@ export class Resource$Targetpools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -39574,13 +39608,13 @@ export class Resource$Targetsslproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -39631,12 +39665,12 @@ export class Resource$Targetsslproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$TargetSslProxy>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetSslProxy>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetSslProxy>,
       callback?: BodyResponseCallback<Schema$TargetSslProxy>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetSslProxy>,
       callback?: BodyResponseCallback<Schema$TargetSslProxy>):
       void|AxiosPromise<Schema$TargetSslProxy> {
@@ -39688,13 +39722,13 @@ export class Resource$Targetsslproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -39747,14 +39781,14 @@ export class Resource$Targetsslproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetSslProxyList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetSslProxyList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetSslProxyList>,
       callback?: BodyResponseCallback<Schema$TargetSslProxyList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetSslProxyList>,
       callback?: BodyResponseCallback<Schema$TargetSslProxyList>):
       void|AxiosPromise<Schema$TargetSslProxyList> {
@@ -39805,14 +39839,14 @@ export class Resource$Targetsslproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setBackendService(params: any, options?: MethodOptions):
+  setBackendService(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setBackendService(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setBackendService(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -39864,14 +39898,14 @@ export class Resource$Targetsslproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setProxyHeader(params: any, options?: MethodOptions):
+  setProxyHeader(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setProxyHeader(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setProxyHeader(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -39923,14 +39957,14 @@ export class Resource$Targetsslproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setSslCertificates(params: any, options?: MethodOptions):
+  setSslCertificates(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setSslCertificates(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setSslCertificates(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -39985,14 +40019,14 @@ export class Resource$Targetsslproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setSslPolicy(params: any, options?: MethodOptions):
+  setSslPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setSslPolicy(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setSslPolicy(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -40043,15 +40077,15 @@ export class Resource$Targetsslproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -40115,13 +40149,13 @@ export class Resource$Targettcpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -40172,12 +40206,12 @@ export class Resource$Targettcpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$TargetTcpProxy>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetTcpProxy>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetTcpProxy>,
       callback?: BodyResponseCallback<Schema$TargetTcpProxy>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetTcpProxy>,
       callback?: BodyResponseCallback<Schema$TargetTcpProxy>):
       void|AxiosPromise<Schema$TargetTcpProxy> {
@@ -40229,13 +40263,13 @@ export class Resource$Targettcpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -40288,14 +40322,14 @@ export class Resource$Targettcpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetTcpProxyList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetTcpProxyList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetTcpProxyList>,
       callback?: BodyResponseCallback<Schema$TargetTcpProxyList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetTcpProxyList>,
       callback?: BodyResponseCallback<Schema$TargetTcpProxyList>):
       void|AxiosPromise<Schema$TargetTcpProxyList> {
@@ -40346,14 +40380,14 @@ export class Resource$Targettcpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setBackendService(params: any, options?: MethodOptions):
+  setBackendService(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setBackendService(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setBackendService(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -40405,14 +40439,14 @@ export class Resource$Targettcpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setProxyHeader(params: any, options?: MethodOptions):
+  setProxyHeader(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setProxyHeader(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setProxyHeader(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -40463,15 +40497,15 @@ export class Resource$Targettcpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -40537,16 +40571,16 @@ export class Resource$Targetvpngateways {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetVpnGatewayAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TargetVpnGatewayAggregatedList>,
       callback?: BodyResponseCallback<Schema$TargetVpnGatewayAggregatedList>):
       void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TargetVpnGatewayAggregatedList>,
       callback?: BodyResponseCallback<Schema$TargetVpnGatewayAggregatedList>):
@@ -40601,13 +40635,13 @@ export class Resource$Targetvpngateways {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -40659,12 +40693,12 @@ export class Resource$Targetvpngateways {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$TargetVpnGateway>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetVpnGateway>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetVpnGateway>,
       callback?: BodyResponseCallback<Schema$TargetVpnGateway>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetVpnGateway>,
       callback?: BodyResponseCallback<Schema$TargetVpnGateway>):
       void|AxiosPromise<Schema$TargetVpnGateway> {
@@ -40717,13 +40751,13 @@ export class Resource$Targetvpngateways {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -40778,14 +40812,14 @@ export class Resource$Targetvpngateways {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetVpnGatewayList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetVpnGatewayList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetVpnGatewayList>,
       callback?: BodyResponseCallback<Schema$TargetVpnGatewayList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetVpnGatewayList>,
       callback?: BodyResponseCallback<Schema$TargetVpnGatewayList>):
       void|AxiosPromise<Schema$TargetVpnGatewayList> {
@@ -40839,14 +40873,14 @@ export class Resource$Targetvpngateways {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setLabels(params: any, options?: MethodOptions):
+  setLabels(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setLabels(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setLabels(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -40898,15 +40932,15 @@ export class Resource$Targetvpngateways {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -40970,13 +41004,13 @@ export class Resource$Urlmaps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -41026,10 +41060,10 @@ export class Resource$Urlmaps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$UrlMap>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$UrlMap>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$UrlMap>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$UrlMap>,
       callback?: BodyResponseCallback<Schema$UrlMap>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$UrlMap>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$UrlMap>,
       callback?: BodyResponseCallback<Schema$UrlMap>):
       void|AxiosPromise<Schema$UrlMap> {
     if (typeof options === 'function') {
@@ -41079,13 +41113,13 @@ export class Resource$Urlmaps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -41136,14 +41170,14 @@ export class Resource$Urlmaps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  invalidateCache(params: any, options?: MethodOptions):
+  invalidateCache(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   invalidateCache(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   invalidateCache(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -41197,13 +41231,13 @@ export class Resource$Urlmaps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$UrlMapList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$UrlMapList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UrlMapList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UrlMapList>,
       callback?: BodyResponseCallback<Schema$UrlMapList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UrlMapList>,
       callback?: BodyResponseCallback<Schema$UrlMapList>):
       void|AxiosPromise<Schema$UrlMapList> {
@@ -41255,13 +41289,13 @@ export class Resource$Urlmaps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -41311,15 +41345,15 @@ export class Resource$Urlmaps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -41373,13 +41407,13 @@ export class Resource$Urlmaps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -41431,15 +41465,15 @@ export class Resource$Urlmaps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  validate(params: any, options?: MethodOptions):
+  validate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$UrlMapsValidateResponse>;
   validate(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$UrlMapsValidateResponse>,
       callback?: BodyResponseCallback<Schema$UrlMapsValidateResponse>): void;
   validate(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$UrlMapsValidateResponse>,
       callback?: BodyResponseCallback<Schema$UrlMapsValidateResponse>):
@@ -41505,15 +41539,15 @@ export class Resource$Vpntunnels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$VpnTunnelAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$VpnTunnelAggregatedList>,
       callback?: BodyResponseCallback<Schema$VpnTunnelAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$VpnTunnelAggregatedList>,
       callback?: BodyResponseCallback<Schema$VpnTunnelAggregatedList>):
@@ -41565,13 +41599,13 @@ export class Resource$Vpntunnels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -41623,11 +41657,11 @@ export class Resource$Vpntunnels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$VpnTunnel>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$VpnTunnel>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$VpnTunnel>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$VpnTunnel>,
       callback?: BodyResponseCallback<Schema$VpnTunnel>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$VpnTunnel>,
       callback?: BodyResponseCallback<Schema$VpnTunnel>):
       void|AxiosPromise<Schema$VpnTunnel> {
@@ -41680,13 +41714,13 @@ export class Resource$Vpntunnels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -41741,14 +41775,14 @@ export class Resource$Vpntunnels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$VpnTunnelList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$VpnTunnelList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$VpnTunnelList>,
       callback?: BodyResponseCallback<Schema$VpnTunnelList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$VpnTunnelList>,
       callback?: BodyResponseCallback<Schema$VpnTunnelList>):
       void|AxiosPromise<Schema$VpnTunnelList> {
@@ -41802,14 +41836,14 @@ export class Resource$Vpntunnels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setLabels(params: any, options?: MethodOptions):
+  setLabels(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setLabels(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setLabels(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -41861,15 +41895,15 @@ export class Resource$Vpntunnels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -41933,12 +41967,12 @@ export class Resource$Zoneoperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -41987,11 +42021,11 @@ export class Resource$Zoneoperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -42046,14 +42080,14 @@ export class Resource$Zoneoperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OperationList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$OperationList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OperationList>,
       callback?: BodyResponseCallback<Schema$OperationList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$OperationList>,
       callback?: BodyResponseCallback<Schema$OperationList>):
       void|AxiosPromise<Schema$OperationList> {
@@ -42115,10 +42149,10 @@ export class Resource$Zones {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Zone>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Zone>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Zone>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Zone>,
       callback?: BodyResponseCallback<Schema$Zone>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Zone>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Zone>,
       callback?: BodyResponseCallback<Schema$Zone>):
       void|AxiosPromise<Schema$Zone> {
     if (typeof options === 'function') {
@@ -42169,12 +42203,13 @@ export class Resource$Zones {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$ZoneList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$ZoneList>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$ZoneList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ZoneList>,
       callback?: BodyResponseCallback<Schema$ZoneList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ZoneList>,
       callback?: BodyResponseCallback<Schema$ZoneList>):
       void|AxiosPromise<Schema$ZoneList> {
diff --git a/src/apis/compute/beta.ts b/src/apis/compute/beta.ts
index 5da65a054a..eace45e966 100644
--- a/src/apis/compute/beta.ts
+++ b/src/apis/compute/beta.ts
@@ -9768,16 +9768,16 @@ export class Resource$Acceleratortypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AcceleratorTypeAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AcceleratorTypeAggregatedList>,
       callback?: BodyResponseCallback<Schema$AcceleratorTypeAggregatedList>):
       void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AcceleratorTypeAggregatedList>,
       callback?: BodyResponseCallback<Schema$AcceleratorTypeAggregatedList>):
@@ -9890,12 +9890,12 @@ export class Resource$Acceleratortypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$AcceleratorType>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AcceleratorType>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AcceleratorType>,
       callback?: BodyResponseCallback<Schema$AcceleratorType>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AcceleratorType>,
       callback?: BodyResponseCallback<Schema$AcceleratorType>):
       void|AxiosPromise<Schema$AcceleratorType> {
@@ -10018,14 +10018,14 @@ export class Resource$Acceleratortypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AcceleratorTypeList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AcceleratorTypeList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AcceleratorTypeList>,
       callback?: BodyResponseCallback<Schema$AcceleratorTypeList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AcceleratorTypeList>,
       callback?: BodyResponseCallback<Schema$AcceleratorTypeList>):
       void|AxiosPromise<Schema$AcceleratorTypeList> {
@@ -10155,14 +10155,15 @@ export class Resource$Addresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AddressAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AddressAggregatedList>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$AddressAggregatedList>,
       callback?: BodyResponseCallback<Schema$AddressAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AddressAggregatedList>,
       callback?: BodyResponseCallback<Schema$AddressAggregatedList>):
@@ -10272,13 +10273,13 @@ export class Resource$Addresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -10387,10 +10388,12 @@ export class Resource$Addresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Address>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Address>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Address>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Address>,
       callback?: BodyResponseCallback<Schema$Address>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Address>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Address>,
       callback?: BodyResponseCallback<Schema$Address>):
       void|AxiosPromise<Schema$Address> {
     if (typeof options === 'function') {
@@ -10501,13 +10504,13 @@ export class Resource$Addresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -10628,13 +10631,13 @@ export class Resource$Addresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$AddressList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$AddressList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AddressList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AddressList>,
       callback?: BodyResponseCallback<Schema$AddressList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AddressList>,
       callback?: BodyResponseCallback<Schema$AddressList>):
       void|AxiosPromise<Schema$AddressList> {
@@ -10749,14 +10752,14 @@ export class Resource$Addresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setLabels(params: any, options?: MethodOptions):
+  setLabels(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setLabels(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setLabels(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -10870,15 +10873,15 @@ export class Resource$Addresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -11009,15 +11012,15 @@ export class Resource$Autoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AutoscalerAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AutoscalerAggregatedList>,
       callback?: BodyResponseCallback<Schema$AutoscalerAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AutoscalerAggregatedList>,
       callback?: BodyResponseCallback<Schema$AutoscalerAggregatedList>):
@@ -11127,13 +11130,13 @@ export class Resource$Autoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -11243,11 +11246,11 @@ export class Resource$Autoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Autoscaler>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Autoscaler>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Autoscaler>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Autoscaler>,
       callback?: BodyResponseCallback<Schema$Autoscaler>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Autoscaler>,
       callback?: BodyResponseCallback<Schema$Autoscaler>):
       void|AxiosPromise<Schema$Autoscaler> {
@@ -11359,13 +11362,13 @@ export class Resource$Autoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -11486,14 +11489,14 @@ export class Resource$Autoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AutoscalerList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AutoscalerList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AutoscalerList>,
       callback?: BodyResponseCallback<Schema$AutoscalerList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AutoscalerList>,
       callback?: BodyResponseCallback<Schema$AutoscalerList>):
       void|AxiosPromise<Schema$AutoscalerList> {
@@ -11608,13 +11611,13 @@ export class Resource$Autoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -11727,15 +11730,15 @@ export class Resource$Autoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -11851,13 +11854,13 @@ export class Resource$Autoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -11920,14 +11923,14 @@ export class Resource$Backendbuckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  addSignedUrlKey(params: any, options?: MethodOptions):
+  addSignedUrlKey(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   addSignedUrlKey(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   addSignedUrlKey(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -12033,13 +12036,13 @@ export class Resource$Backendbuckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -12091,14 +12094,14 @@ export class Resource$Backendbuckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  deleteSignedUrlKey(params: any, options?: MethodOptions):
+  deleteSignedUrlKey(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   deleteSignedUrlKey(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   deleteSignedUrlKey(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -12204,11 +12207,12 @@ export class Resource$Backendbuckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$BackendBucket>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BackendBucket>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$BackendBucket>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BackendBucket>,
       callback?: BodyResponseCallback<Schema$BackendBucket>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BackendBucket>,
       callback?: BodyResponseCallback<Schema$BackendBucket>):
       void|AxiosPromise<Schema$BackendBucket> {
@@ -12316,13 +12320,13 @@ export class Resource$Backendbuckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -12440,14 +12444,14 @@ export class Resource$Backendbuckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BackendBucketList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BackendBucketList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BackendBucketList>,
       callback?: BodyResponseCallback<Schema$BackendBucketList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BackendBucketList>,
       callback?: BodyResponseCallback<Schema$BackendBucketList>):
       void|AxiosPromise<Schema$BackendBucketList> {
@@ -12561,13 +12565,13 @@ export class Resource$Backendbuckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -12681,13 +12685,13 @@ export class Resource$Backendbuckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -12751,14 +12755,14 @@ export class Resource$Backendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  addSignedUrlKey(params: any, options?: MethodOptions):
+  addSignedUrlKey(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   addSignedUrlKey(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   addSignedUrlKey(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -12877,16 +12881,16 @@ export class Resource$Backendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BackendServiceAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$BackendServiceAggregatedList>,
       callback?: BodyResponseCallback<Schema$BackendServiceAggregatedList>):
       void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$BackendServiceAggregatedList>,
       callback?: BodyResponseCallback<Schema$BackendServiceAggregatedList>):
@@ -12994,13 +12998,13 @@ export class Resource$Backendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -13052,14 +13056,14 @@ export class Resource$Backendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  deleteSignedUrlKey(params: any, options?: MethodOptions):
+  deleteSignedUrlKey(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   deleteSignedUrlKey(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   deleteSignedUrlKey(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -13166,12 +13170,12 @@ export class Resource$Backendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$BackendService>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BackendService>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BackendService>,
       callback?: BodyResponseCallback<Schema$BackendService>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BackendService>,
       callback?: BodyResponseCallback<Schema$BackendService>):
       void|AxiosPromise<Schema$BackendService> {
@@ -13281,15 +13285,15 @@ export class Resource$Backendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getHealth(params: any, options?: MethodOptions):
+  getHealth(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BackendServiceGroupHealth>;
   getHealth(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$BackendServiceGroupHealth>,
       callback?: BodyResponseCallback<Schema$BackendServiceGroupHealth>): void;
   getHealth(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$BackendServiceGroupHealth>,
       callback?: BodyResponseCallback<Schema$BackendServiceGroupHealth>):
@@ -13400,13 +13404,13 @@ export class Resource$Backendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -13524,14 +13528,14 @@ export class Resource$Backendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BackendServiceList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BackendServiceList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BackendServiceList>,
       callback?: BodyResponseCallback<Schema$BackendServiceList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BackendServiceList>,
       callback?: BodyResponseCallback<Schema$BackendServiceList>):
       void|AxiosPromise<Schema$BackendServiceList> {
@@ -13648,13 +13652,13 @@ export class Resource$Backendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -13766,14 +13770,14 @@ export class Resource$Backendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setSecurityPolicy(params: any, options?: MethodOptions):
+  setSecurityPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setSecurityPolicy(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setSecurityPolicy(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -13881,15 +13885,15 @@ export class Resource$Backendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -14007,13 +14011,13 @@ export class Resource$Backendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -14143,14 +14147,14 @@ export class Resource$Disks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DiskAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DiskAggregatedList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DiskAggregatedList>,
       callback?: BodyResponseCallback<Schema$DiskAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DiskAggregatedList>,
       callback?: BodyResponseCallback<Schema$DiskAggregatedList>):
       void|AxiosPromise<Schema$DiskAggregatedList> {
@@ -14264,14 +14268,14 @@ export class Resource$Disks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  createSnapshot(params: any, options?: MethodOptions):
+  createSnapshot(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   createSnapshot(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   createSnapshot(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -14384,13 +14388,13 @@ export class Resource$Disks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -14499,10 +14503,10 @@ export class Resource$Disks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Disk>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Disk>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Disk>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Disk>,
       callback?: BodyResponseCallback<Schema$Disk>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Disk>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Disk>,
       callback?: BodyResponseCallback<Schema$Disk>):
       void|AxiosPromise<Schema$Disk> {
     if (typeof options === 'function') {
@@ -14616,13 +14620,13 @@ export class Resource$Disks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -14744,12 +14748,13 @@ export class Resource$Disks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$DiskList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$DiskList>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$DiskList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DiskList>,
       callback?: BodyResponseCallback<Schema$DiskList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DiskList>,
       callback?: BodyResponseCallback<Schema$DiskList>):
       void|AxiosPromise<Schema$DiskList> {
@@ -14864,13 +14869,13 @@ export class Resource$Disks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resize(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  resize(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   resize(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   resize(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -14986,14 +14991,14 @@ export class Resource$Disks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setLabels(params: any, options?: MethodOptions):
+  setLabels(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setLabels(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setLabels(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -15107,15 +15112,15 @@ export class Resource$Disks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -15246,15 +15251,15 @@ export class Resource$Disktypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DiskTypeAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$DiskTypeAggregatedList>,
       callback?: BodyResponseCallback<Schema$DiskTypeAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$DiskTypeAggregatedList>,
       callback?: BodyResponseCallback<Schema$DiskTypeAggregatedList>):
@@ -15364,10 +15369,11 @@ export class Resource$Disktypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$DiskType>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$DiskType>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$DiskType>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DiskType>,
       callback?: BodyResponseCallback<Schema$DiskType>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DiskType>,
       callback?: BodyResponseCallback<Schema$DiskType>):
       void|AxiosPromise<Schema$DiskType> {
@@ -15489,13 +15495,14 @@ export class Resource$Disktypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$DiskTypeList>;
+  list(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$DiskTypeList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DiskTypeList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DiskTypeList>,
       callback?: BodyResponseCallback<Schema$DiskTypeList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DiskTypeList>,
       callback?: BodyResponseCallback<Schema$DiskTypeList>):
       void|AxiosPromise<Schema$DiskTypeList> {
@@ -15612,13 +15619,13 @@ export class Resource$Firewalls {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -15723,10 +15730,11 @@ export class Resource$Firewalls {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Firewall>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Firewall>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Firewall>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Firewall>,
       callback?: BodyResponseCallback<Schema$Firewall>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Firewall>,
       callback?: BodyResponseCallback<Schema$Firewall>):
       void|AxiosPromise<Schema$Firewall> {
@@ -15834,13 +15842,13 @@ export class Resource$Firewalls {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -15957,13 +15965,14 @@ export class Resource$Firewalls {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$FirewallList>;
+  list(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$FirewallList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$FirewallList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$FirewallList>,
       callback?: BodyResponseCallback<Schema$FirewallList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$FirewallList>,
       callback?: BodyResponseCallback<Schema$FirewallList>):
       void|AxiosPromise<Schema$FirewallList> {
@@ -16076,13 +16085,13 @@ export class Resource$Firewalls {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -16192,15 +16201,15 @@ export class Resource$Firewalls {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -16316,13 +16325,13 @@ export class Resource$Firewalls {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -16452,16 +16461,16 @@ export class Resource$Forwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ForwardingRuleAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ForwardingRuleAggregatedList>,
       callback?: BodyResponseCallback<Schema$ForwardingRuleAggregatedList>):
       void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ForwardingRuleAggregatedList>,
       callback?: BodyResponseCallback<Schema$ForwardingRuleAggregatedList>):
@@ -16573,13 +16582,13 @@ export class Resource$Forwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -16689,12 +16698,12 @@ export class Resource$Forwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$ForwardingRule>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ForwardingRule>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ForwardingRule>,
       callback?: BodyResponseCallback<Schema$ForwardingRule>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ForwardingRule>,
       callback?: BodyResponseCallback<Schema$ForwardingRule>):
       void|AxiosPromise<Schema$ForwardingRule> {
@@ -16806,13 +16815,13 @@ export class Resource$Forwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -16935,14 +16944,14 @@ export class Resource$Forwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ForwardingRuleList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ForwardingRuleList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ForwardingRuleList>,
       callback?: BodyResponseCallback<Schema$ForwardingRuleList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ForwardingRuleList>,
       callback?: BodyResponseCallback<Schema$ForwardingRuleList>):
       void|AxiosPromise<Schema$ForwardingRuleList> {
@@ -17058,14 +17067,14 @@ export class Resource$Forwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setLabels(params: any, options?: MethodOptions):
+  setLabels(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setLabels(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setLabels(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -17182,14 +17191,14 @@ export class Resource$Forwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setTarget(params: any, options?: MethodOptions):
+  setTarget(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setTarget(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setTarget(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -17301,15 +17310,15 @@ export class Resource$Forwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -17428,13 +17437,13 @@ export class Resource$Globaladdresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -17539,10 +17548,12 @@ export class Resource$Globaladdresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Address>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Address>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Address>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Address>,
       callback?: BodyResponseCallback<Schema$Address>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Address>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Address>,
       callback?: BodyResponseCallback<Schema$Address>):
       void|AxiosPromise<Schema$Address> {
     if (typeof options === 'function') {
@@ -17648,13 +17659,13 @@ export class Resource$Globaladdresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -17770,13 +17781,13 @@ export class Resource$Globaladdresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$AddressList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$AddressList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AddressList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AddressList>,
       callback?: BodyResponseCallback<Schema$AddressList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AddressList>,
       callback?: BodyResponseCallback<Schema$AddressList>):
       void|AxiosPromise<Schema$AddressList> {
@@ -17885,14 +17896,14 @@ export class Resource$Globaladdresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setLabels(params: any, options?: MethodOptions):
+  setLabels(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setLabels(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setLabels(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -18000,15 +18011,15 @@ export class Resource$Globaladdresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -18128,13 +18139,13 @@ export class Resource$Globalforwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -18241,12 +18252,12 @@ export class Resource$Globalforwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$ForwardingRule>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ForwardingRule>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ForwardingRule>,
       callback?: BodyResponseCallback<Schema$ForwardingRule>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ForwardingRule>,
       callback?: BodyResponseCallback<Schema$ForwardingRule>):
       void|AxiosPromise<Schema$ForwardingRule> {
@@ -18354,13 +18365,13 @@ export class Resource$Globalforwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -18478,14 +18489,14 @@ export class Resource$Globalforwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ForwardingRuleList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ForwardingRuleList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ForwardingRuleList>,
       callback?: BodyResponseCallback<Schema$ForwardingRuleList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ForwardingRuleList>,
       callback?: BodyResponseCallback<Schema$ForwardingRuleList>):
       void|AxiosPromise<Schema$ForwardingRuleList> {
@@ -18593,14 +18604,14 @@ export class Resource$Globalforwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setLabels(params: any, options?: MethodOptions):
+  setLabels(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setLabels(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setLabels(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -18711,14 +18722,14 @@ export class Resource$Globalforwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setTarget(params: any, options?: MethodOptions):
+  setTarget(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setTarget(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setTarget(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -18826,15 +18837,15 @@ export class Resource$Globalforwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -18965,15 +18976,15 @@ export class Resource$Globaloperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OperationAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OperationAggregatedList>,
       callback?: BodyResponseCallback<Schema$OperationAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OperationAggregatedList>,
       callback?: BodyResponseCallback<Schema$OperationAggregatedList>):
@@ -19075,12 +19086,12 @@ export class Resource$Globaloperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -19184,11 +19195,11 @@ export class Resource$Globaloperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -19307,14 +19318,14 @@ export class Resource$Globaloperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OperationList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$OperationList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OperationList>,
       callback?: BodyResponseCallback<Schema$OperationList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$OperationList>,
       callback?: BodyResponseCallback<Schema$OperationList>):
       void|AxiosPromise<Schema$OperationList> {
@@ -19431,13 +19442,13 @@ export class Resource$Healthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -19543,11 +19554,11 @@ export class Resource$Healthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$HealthCheck>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$HealthCheck>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$HealthCheck>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$HealthCheck>,
       callback?: BodyResponseCallback<Schema$HealthCheck>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$HealthCheck>,
       callback?: BodyResponseCallback<Schema$HealthCheck>):
       void|AxiosPromise<Schema$HealthCheck> {
@@ -19655,13 +19666,13 @@ export class Resource$Healthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -19779,14 +19790,14 @@ export class Resource$Healthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$HealthCheckList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$HealthCheckList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$HealthCheckList>,
       callback?: BodyResponseCallback<Schema$HealthCheckList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$HealthCheckList>,
       callback?: BodyResponseCallback<Schema$HealthCheckList>):
       void|AxiosPromise<Schema$HealthCheckList> {
@@ -19900,13 +19911,13 @@ export class Resource$Healthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -20014,15 +20025,15 @@ export class Resource$Healthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -20137,13 +20148,13 @@ export class Resource$Healthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -20262,13 +20273,13 @@ export class Resource$Httphealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -20375,12 +20386,12 @@ export class Resource$Httphealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$HttpHealthCheck>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$HttpHealthCheck>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$HttpHealthCheck>,
       callback?: BodyResponseCallback<Schema$HttpHealthCheck>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$HttpHealthCheck>,
       callback?: BodyResponseCallback<Schema$HttpHealthCheck>):
       void|AxiosPromise<Schema$HttpHealthCheck> {
@@ -20488,13 +20499,13 @@ export class Resource$Httphealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -20612,14 +20623,14 @@ export class Resource$Httphealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$HttpHealthCheckList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$HttpHealthCheckList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$HttpHealthCheckList>,
       callback?: BodyResponseCallback<Schema$HttpHealthCheckList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$HttpHealthCheckList>,
       callback?: BodyResponseCallback<Schema$HttpHealthCheckList>):
       void|AxiosPromise<Schema$HttpHealthCheckList> {
@@ -20734,13 +20745,13 @@ export class Resource$Httphealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -20848,15 +20859,15 @@ export class Resource$Httphealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -20972,13 +20983,13 @@ export class Resource$Httphealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -21097,13 +21108,13 @@ export class Resource$Httpshealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -21210,12 +21221,12 @@ export class Resource$Httpshealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$HttpsHealthCheck>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$HttpsHealthCheck>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$HttpsHealthCheck>,
       callback?: BodyResponseCallback<Schema$HttpsHealthCheck>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$HttpsHealthCheck>,
       callback?: BodyResponseCallback<Schema$HttpsHealthCheck>):
       void|AxiosPromise<Schema$HttpsHealthCheck> {
@@ -21323,13 +21334,13 @@ export class Resource$Httpshealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -21447,14 +21458,14 @@ export class Resource$Httpshealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$HttpsHealthCheckList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$HttpsHealthCheckList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$HttpsHealthCheckList>,
       callback?: BodyResponseCallback<Schema$HttpsHealthCheckList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$HttpsHealthCheckList>,
       callback?: BodyResponseCallback<Schema$HttpsHealthCheckList>):
       void|AxiosPromise<Schema$HttpsHealthCheckList> {
@@ -21569,13 +21580,13 @@ export class Resource$Httpshealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -21683,15 +21694,15 @@ export class Resource$Httpshealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -21807,13 +21818,13 @@ export class Resource$Httpshealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -21931,13 +21942,13 @@ export class Resource$Images {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -22048,14 +22059,14 @@ export class Resource$Images {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  deprecate(params: any, options?: MethodOptions):
+  deprecate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   deprecate(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   deprecate(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -22161,10 +22172,10 @@ export class Resource$Images {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Image>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Image>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Image>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Image>,
       callback?: BodyResponseCallback<Schema$Image>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Image>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Image>,
       callback?: BodyResponseCallback<Schema$Image>):
       void|AxiosPromise<Schema$Image> {
     if (typeof options === 'function') {
@@ -22268,13 +22279,13 @@ export class Resource$Images {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getFromFamily(params: any, options?: MethodOptions):
+  getFromFamily(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Image>;
   getFromFamily(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Image>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Image>,
       callback?: BodyResponseCallback<Schema$Image>): void;
   getFromFamily(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Image>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Image>,
       callback?: BodyResponseCallback<Schema$Image>):
       void|AxiosPromise<Schema$Image> {
     if (typeof options === 'function') {
@@ -22382,13 +22393,13 @@ export class Resource$Images {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -22509,13 +22520,13 @@ export class Resource$Images {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$ImageList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$ImageList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ImageList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ImageList>,
       callback?: BodyResponseCallback<Schema$ImageList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ImageList>,
       callback?: BodyResponseCallback<Schema$ImageList>):
       void|AxiosPromise<Schema$ImageList> {
@@ -22624,14 +22635,14 @@ export class Resource$Images {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setLabels(params: any, options?: MethodOptions):
+  setLabels(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setLabels(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setLabels(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -22741,15 +22752,15 @@ export class Resource$Images {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -22887,14 +22898,14 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  abandonInstances(params: any, options?: MethodOptions):
+  abandonInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   abandonInstances(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   abandonInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -23013,17 +23024,17 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstanceGroupManagerAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InstanceGroupManagerAggregatedList>,
       callback?:
           BodyResponseCallback<Schema$InstanceGroupManagerAggregatedList>):
       void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InstanceGroupManagerAggregatedList>,
       callback?:
@@ -23140,13 +23151,13 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -23270,14 +23281,14 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  deleteInstances(params: any, options?: MethodOptions):
+  deleteInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   deleteInstances(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   deleteInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -23389,12 +23400,12 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$InstanceGroupManager>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InstanceGroupManager>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InstanceGroupManager>,
       callback?: BodyResponseCallback<Schema$InstanceGroupManager>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InstanceGroupManager>,
       callback?: BodyResponseCallback<Schema$InstanceGroupManager>):
       void|AxiosPromise<Schema$InstanceGroupManager> {
@@ -23512,13 +23523,13 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -23641,15 +23652,15 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstanceGroupManagerList>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InstanceGroupManagerList>,
       callback?: BodyResponseCallback<Schema$InstanceGroupManagerList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InstanceGroupManagerList>,
       callback?: BodyResponseCallback<Schema$InstanceGroupManagerList>):
@@ -23784,16 +23795,16 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listManagedInstances(params: any, options?: MethodOptions):
+  listManagedInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstanceGroupManagersListManagedInstancesResponse>;
   listManagedInstances(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$InstanceGroupManagersListManagedInstancesResponse>,
       callback?: BodyResponseCallback<
           Schema$InstanceGroupManagersListManagedInstancesResponse>): void;
   listManagedInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$InstanceGroupManagersListManagedInstancesResponse>,
       callback?: BodyResponseCallback<
@@ -23921,13 +23932,13 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -24050,14 +24061,14 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  recreateInstances(params: any, options?: MethodOptions):
+  recreateInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   recreateInstances(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   recreateInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -24184,13 +24195,13 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resize(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  resize(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   resize(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   resize(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -24315,14 +24326,14 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resizeAdvanced(params: any, options?: MethodOptions):
+  resizeAdvanced(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   resizeAdvanced(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   resizeAdvanced(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -24436,14 +24447,14 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setAutoHealingPolicies(params: any, options?: MethodOptions):
+  setAutoHealingPolicies(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setAutoHealingPolicies(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setAutoHealingPolicies(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -24559,14 +24570,14 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setInstanceTemplate(params: any, options?: MethodOptions):
+  setInstanceTemplate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setInstanceTemplate(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setInstanceTemplate(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -24685,14 +24696,14 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setTargetPools(params: any, options?: MethodOptions):
+  setTargetPools(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setTargetPools(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setTargetPools(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -24804,15 +24815,15 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -24935,13 +24946,13 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -25070,14 +25081,14 @@ export class Resource$Instancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  addInstances(params: any, options?: MethodOptions):
+  addInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   addInstances(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   addInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -25195,16 +25206,16 @@ export class Resource$Instancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstanceGroupAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InstanceGroupAggregatedList>,
       callback?: BodyResponseCallback<Schema$InstanceGroupAggregatedList>):
       void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InstanceGroupAggregatedList>,
       callback?: BodyResponseCallback<Schema$InstanceGroupAggregatedList>):
@@ -25317,13 +25328,13 @@ export class Resource$Instancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -25433,11 +25444,12 @@ export class Resource$Instancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$InstanceGroup>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InstanceGroup>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$InstanceGroup>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InstanceGroup>,
       callback?: BodyResponseCallback<Schema$InstanceGroup>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InstanceGroup>,
       callback?: BodyResponseCallback<Schema$InstanceGroup>):
       void|AxiosPromise<Schema$InstanceGroup> {
@@ -25549,13 +25561,13 @@ export class Resource$Instancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -25678,14 +25690,14 @@ export class Resource$Instancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstanceGroupList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InstanceGroupList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InstanceGroupList>,
       callback?: BodyResponseCallback<Schema$InstanceGroupList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InstanceGroupList>,
       callback?: BodyResponseCallback<Schema$InstanceGroupList>):
       void|AxiosPromise<Schema$InstanceGroupList> {
@@ -25817,16 +25829,16 @@ export class Resource$Instancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listInstances(params: any, options?: MethodOptions):
+  listInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstanceGroupsListInstances>;
   listInstances(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InstanceGroupsListInstances>,
       callback?: BodyResponseCallback<Schema$InstanceGroupsListInstances>):
       void;
   listInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InstanceGroupsListInstances>,
       callback?: BodyResponseCallback<Schema$InstanceGroupsListInstances>):
@@ -25948,14 +25960,14 @@ export class Resource$Instancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  removeInstances(params: any, options?: MethodOptions):
+  removeInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   removeInstances(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   removeInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -26070,14 +26082,14 @@ export class Resource$Instancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setNamedPorts(params: any, options?: MethodOptions):
+  setNamedPorts(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setNamedPorts(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setNamedPorts(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -26189,15 +26201,15 @@ export class Resource$Instancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -26329,14 +26341,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  addAccessConfig(params: any, options?: MethodOptions):
+  addAccessConfig(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   addAccessConfig(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   addAccessConfig(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -26454,15 +26466,15 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstanceAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InstanceAggregatedList>,
       callback?: BodyResponseCallback<Schema$InstanceAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InstanceAggregatedList>,
       callback?: BodyResponseCallback<Schema$InstanceAggregatedList>):
@@ -26581,14 +26593,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  attachDisk(params: any, options?: MethodOptions):
+  attachDisk(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   attachDisk(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   attachDisk(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -26699,13 +26711,13 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -26823,14 +26835,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  deleteAccessConfig(params: any, options?: MethodOptions):
+  deleteAccessConfig(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   deleteAccessConfig(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   deleteAccessConfig(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -26945,14 +26957,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  detachDisk(params: any, options?: MethodOptions):
+  detachDisk(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   detachDisk(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   detachDisk(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -27062,10 +27074,11 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Instance>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Instance>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Instance>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Instance>,
       callback?: BodyResponseCallback<Schema$Instance>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Instance>,
       callback?: BodyResponseCallback<Schema$Instance>):
       void|AxiosPromise<Schema$Instance> {
@@ -27176,14 +27189,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getSerialPortOutput(params: any, options?: MethodOptions):
+  getSerialPortOutput(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SerialPortOutput>;
   getSerialPortOutput(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SerialPortOutput>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SerialPortOutput>,
       callback?: BodyResponseCallback<Schema$SerialPortOutput>): void;
   getSerialPortOutput(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SerialPortOutput>,
       callback?: BodyResponseCallback<Schema$SerialPortOutput>):
       void|AxiosPromise<Schema$SerialPortOutput> {
@@ -27296,13 +27309,13 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -27423,13 +27436,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$InstanceList>;
+  list(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$InstanceList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InstanceList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InstanceList>,
       callback?: BodyResponseCallback<Schema$InstanceList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InstanceList>,
       callback?: BodyResponseCallback<Schema$InstanceList>):
       void|AxiosPromise<Schema$InstanceList> {
@@ -27557,14 +27571,15 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listReferrers(params: any, options?: MethodOptions):
+  listReferrers(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstanceListReferrers>;
   listReferrers(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InstanceListReferrers>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$InstanceListReferrers>,
       callback?: BodyResponseCallback<Schema$InstanceListReferrers>): void;
   listReferrers(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InstanceListReferrers>,
       callback?: BodyResponseCallback<Schema$InstanceListReferrers>):
@@ -27676,13 +27691,13 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  reset(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  reset(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   reset(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   reset(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -27791,14 +27806,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setDeletionProtection(params: any, options?: MethodOptions):
+  setDeletionProtection(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setDeletionProtection(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setDeletionProtection(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -27916,14 +27931,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setDiskAutoDelete(params: any, options?: MethodOptions):
+  setDiskAutoDelete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setDiskAutoDelete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setDiskAutoDelete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -28040,14 +28055,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setLabels(params: any, options?: MethodOptions):
+  setLabels(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setLabels(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setLabels(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -28163,14 +28178,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setMachineResources(params: any, options?: MethodOptions):
+  setMachineResources(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setMachineResources(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setMachineResources(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -28286,14 +28301,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setMachineType(params: any, options?: MethodOptions):
+  setMachineType(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setMachineType(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setMachineType(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -28409,14 +28424,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setMetadata(params: any, options?: MethodOptions):
+  setMetadata(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setMetadata(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setMetadata(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -28533,14 +28548,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setMinCpuPlatform(params: any, options?: MethodOptions):
+  setMinCpuPlatform(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setMinCpuPlatform(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setMinCpuPlatform(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -28655,14 +28670,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setScheduling(params: any, options?: MethodOptions):
+  setScheduling(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setScheduling(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setScheduling(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -28778,14 +28793,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setServiceAccount(params: any, options?: MethodOptions):
+  setServiceAccount(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setServiceAccount(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setServiceAccount(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -28901,13 +28916,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setTags(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  setTags(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Operation>;
   setTags(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setTags(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -28958,14 +28974,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  simulateMaintenanceEvent(params: any, options?: MethodOptions):
+  simulateMaintenanceEvent(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   simulateMaintenanceEvent(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   simulateMaintenanceEvent(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -29076,13 +29092,13 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  start(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  start(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   start(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   start(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -29196,14 +29212,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  startWithEncryptionKey(params: any, options?: MethodOptions):
+  startWithEncryptionKey(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   startWithEncryptionKey(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   startWithEncryptionKey(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -29318,13 +29334,13 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  stop(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  stop(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   stop(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   stop(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -29438,15 +29454,15 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -29568,14 +29584,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  updateAccessConfig(params: any, options?: MethodOptions):
+  updateAccessConfig(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   updateAccessConfig(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   updateAccessConfig(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -29695,14 +29711,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  updateNetworkInterface(params: any, options?: MethodOptions):
+  updateNetworkInterface(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   updateNetworkInterface(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   updateNetworkInterface(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -29823,13 +29839,13 @@ export class Resource$Instancetemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -29936,12 +29952,12 @@ export class Resource$Instancetemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$InstanceTemplate>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InstanceTemplate>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InstanceTemplate>,
       callback?: BodyResponseCallback<Schema$InstanceTemplate>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InstanceTemplate>,
       callback?: BodyResponseCallback<Schema$InstanceTemplate>):
       void|AxiosPromise<Schema$InstanceTemplate> {
@@ -30052,13 +30068,13 @@ export class Resource$Instancetemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -30176,14 +30192,14 @@ export class Resource$Instancetemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstanceTemplateList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InstanceTemplateList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InstanceTemplateList>,
       callback?: BodyResponseCallback<Schema$InstanceTemplateList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InstanceTemplateList>,
       callback?: BodyResponseCallback<Schema$InstanceTemplateList>):
       void|AxiosPromise<Schema$InstanceTemplateList> {
@@ -30290,15 +30306,15 @@ export class Resource$Instancetemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -30429,17 +30445,17 @@ export class Resource$Interconnectattachments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InterconnectAttachmentAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InterconnectAttachmentAggregatedList>,
       callback?:
           BodyResponseCallback<Schema$InterconnectAttachmentAggregatedList>):
       void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InterconnectAttachmentAggregatedList>,
       callback?:
@@ -30554,13 +30570,13 @@ export class Resource$Interconnectattachments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -30670,13 +30686,13 @@ export class Resource$Interconnectattachments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$InterconnectAttachment>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InterconnectAttachment>,
       callback?: BodyResponseCallback<Schema$InterconnectAttachment>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InterconnectAttachment>,
       callback?: BodyResponseCallback<Schema$InterconnectAttachment>):
@@ -30789,13 +30805,13 @@ export class Resource$Interconnectattachments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -30918,15 +30934,15 @@ export class Resource$Interconnectattachments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InterconnectAttachmentList>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InterconnectAttachmentList>,
       callback?: BodyResponseCallback<Schema$InterconnectAttachmentList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InterconnectAttachmentList>,
       callback?: BodyResponseCallback<Schema$InterconnectAttachmentList>):
@@ -30982,13 +30998,13 @@ export class Resource$Interconnectattachments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -31042,14 +31058,14 @@ export class Resource$Interconnectattachments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setLabels(params: any, options?: MethodOptions):
+  setLabels(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setLabels(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setLabels(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -31161,15 +31177,15 @@ export class Resource$Interconnectattachments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -31289,12 +31305,12 @@ export class Resource$Interconnectlocations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$InterconnectLocation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InterconnectLocation>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InterconnectLocation>,
       callback?: BodyResponseCallback<Schema$InterconnectLocation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InterconnectLocation>,
       callback?: BodyResponseCallback<Schema$InterconnectLocation>):
       void|AxiosPromise<Schema$InterconnectLocation> {
@@ -31413,15 +31429,15 @@ export class Resource$Interconnectlocations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InterconnectLocationList>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InterconnectLocationList>,
       callback?: BodyResponseCallback<Schema$InterconnectLocationList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InterconnectLocationList>,
       callback?: BodyResponseCallback<Schema$InterconnectLocationList>):
@@ -31540,13 +31556,13 @@ export class Resource$Interconnects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -31652,11 +31668,11 @@ export class Resource$Interconnects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Interconnect>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Interconnect>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Interconnect>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Interconnect>,
       callback?: BodyResponseCallback<Schema$Interconnect>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Interconnect>,
       callback?: BodyResponseCallback<Schema$Interconnect>):
       void|AxiosPromise<Schema$Interconnect> {
@@ -31764,13 +31780,13 @@ export class Resource$Interconnects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -31888,14 +31904,14 @@ export class Resource$Interconnects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InterconnectList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InterconnectList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InterconnectList>,
       callback?: BodyResponseCallback<Schema$InterconnectList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InterconnectList>,
       callback?: BodyResponseCallback<Schema$InterconnectList>):
       void|AxiosPromise<Schema$InterconnectList> {
@@ -32009,13 +32025,13 @@ export class Resource$Interconnects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -32067,14 +32083,14 @@ export class Resource$Interconnects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setLabels(params: any, options?: MethodOptions):
+  setLabels(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setLabels(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setLabels(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -32182,15 +32198,15 @@ export class Resource$Interconnects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -32254,11 +32270,11 @@ export class Resource$Licensecodes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$LicenseCode>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LicenseCode>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$LicenseCode>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LicenseCode>,
       callback?: BodyResponseCallback<Schema$LicenseCode>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LicenseCode>,
       callback?: BodyResponseCallback<Schema$LicenseCode>):
       void|AxiosPromise<Schema$LicenseCode> {
@@ -32321,13 +32337,13 @@ export class Resource$Licenses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -32431,10 +32447,12 @@ export class Resource$Licenses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$License>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$License>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$License>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$License>,
       callback?: BodyResponseCallback<Schema$License>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$License>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$License>,
       callback?: BodyResponseCallback<Schema$License>):
       void|AxiosPromise<Schema$License> {
     if (typeof options === 'function') {
@@ -32483,13 +32501,13 @@ export class Resource$Licenses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -32545,14 +32563,14 @@ export class Resource$Licenses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LicensesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LicensesListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LicensesListResponse>,
       callback?: BodyResponseCallback<Schema$LicensesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LicensesListResponse>,
       callback?: BodyResponseCallback<Schema$LicensesListResponse>):
       void|AxiosPromise<Schema$LicensesListResponse> {
@@ -32680,15 +32698,15 @@ export class Resource$Machinetypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$MachineTypeAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$MachineTypeAggregatedList>,
       callback?: BodyResponseCallback<Schema$MachineTypeAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$MachineTypeAggregatedList>,
       callback?: BodyResponseCallback<Schema$MachineTypeAggregatedList>):
@@ -32798,11 +32816,11 @@ export class Resource$Machinetypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$MachineType>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$MachineType>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$MachineType>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$MachineType>,
       callback?: BodyResponseCallback<Schema$MachineType>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$MachineType>,
       callback?: BodyResponseCallback<Schema$MachineType>):
       void|AxiosPromise<Schema$MachineType> {
@@ -32924,14 +32942,14 @@ export class Resource$Machinetypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$MachineTypeList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$MachineTypeList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$MachineTypeList>,
       callback?: BodyResponseCallback<Schema$MachineTypeList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$MachineTypeList>,
       callback?: BodyResponseCallback<Schema$MachineTypeList>):
       void|AxiosPromise<Schema$MachineTypeList> {
@@ -33053,14 +33071,14 @@ export class Resource$Networks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  addPeering(params: any, options?: MethodOptions):
+  addPeering(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   addPeering(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   addPeering(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -33166,13 +33184,13 @@ export class Resource$Networks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -33277,10 +33295,12 @@ export class Resource$Networks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Network>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Network>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Network>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Network>,
       callback?: BodyResponseCallback<Schema$Network>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Network>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Network>,
       callback?: BodyResponseCallback<Schema$Network>):
       void|AxiosPromise<Schema$Network> {
     if (typeof options === 'function') {
@@ -33386,13 +33406,13 @@ export class Resource$Networks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -33508,13 +33528,13 @@ export class Resource$Networks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$NetworkList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$NetworkList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$NetworkList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$NetworkList>,
       callback?: BodyResponseCallback<Schema$NetworkList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$NetworkList>,
       callback?: BodyResponseCallback<Schema$NetworkList>):
       void|AxiosPromise<Schema$NetworkList> {
@@ -33626,13 +33646,13 @@ export class Resource$Networks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -33742,14 +33762,14 @@ export class Resource$Networks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  removePeering(params: any, options?: MethodOptions):
+  removePeering(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   removePeering(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   removePeering(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -33856,14 +33876,14 @@ export class Resource$Networks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  switchToCustomMode(params: any, options?: MethodOptions):
+  switchToCustomMode(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   switchToCustomMode(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   switchToCustomMode(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -33973,15 +33993,15 @@ export class Resource$Networks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -34096,14 +34116,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  disableXpnHost(params: any, options?: MethodOptions):
+  disableXpnHost(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   disableXpnHost(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   disableXpnHost(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -34209,14 +34229,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  disableXpnResource(params: any, options?: MethodOptions):
+  disableXpnResource(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   disableXpnResource(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   disableXpnResource(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -34317,14 +34337,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  enableXpnHost(params: any, options?: MethodOptions):
+  enableXpnHost(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   enableXpnHost(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   enableXpnHost(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -34431,14 +34451,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  enableXpnResource(params: any, options?: MethodOptions):
+  enableXpnResource(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   enableXpnResource(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   enableXpnResource(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -34538,10 +34558,12 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Project>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Project>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Project>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Project>,
       callback?: BodyResponseCallback<Schema$Project>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Project>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Project>,
       callback?: BodyResponseCallback<Schema$Project>):
       void|AxiosPromise<Schema$Project> {
     if (typeof options === 'function') {
@@ -34640,13 +34662,15 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getXpnHost(params: any, options?: MethodOptions):
+  getXpnHost(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Project>;
   getXpnHost(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Project>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Project>,
       callback?: BodyResponseCallback<Schema$Project>): void;
   getXpnHost(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Project>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Project>,
       callback?: BodyResponseCallback<Schema$Project>):
       void|AxiosPromise<Schema$Project> {
     if (typeof options === 'function') {
@@ -34762,15 +34786,15 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getXpnResources(params: any, options?: MethodOptions):
+  getXpnResources(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ProjectsGetXpnResources>;
   getXpnResources(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ProjectsGetXpnResources>,
       callback?: BodyResponseCallback<Schema$ProjectsGetXpnResources>): void;
   getXpnResources(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ProjectsGetXpnResources>,
       callback?: BodyResponseCallback<Schema$ProjectsGetXpnResources>):
@@ -34893,14 +34917,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listXpnHosts(params: any, options?: MethodOptions):
+  listXpnHosts(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$XpnHostList>;
   listXpnHosts(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$XpnHostList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$XpnHostList>,
       callback?: BodyResponseCallback<Schema$XpnHostList>): void;
   listXpnHosts(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$XpnHostList>,
       callback?: BodyResponseCallback<Schema$XpnHostList>):
       void|AxiosPromise<Schema$XpnHostList> {
@@ -35005,14 +35029,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  moveDisk(params: any, options?: MethodOptions):
+  moveDisk(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   moveDisk(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   moveDisk(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -35118,14 +35142,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  moveInstance(params: any, options?: MethodOptions):
+  moveInstance(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   moveInstance(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   moveInstance(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -35229,14 +35253,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setCommonInstanceMetadata(params: any, options?: MethodOptions):
+  setCommonInstanceMetadata(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setCommonInstanceMetadata(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setCommonInstanceMetadata(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -35288,14 +35312,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setDefaultNetworkTier(params: any, options?: MethodOptions):
+  setDefaultNetworkTier(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setDefaultNetworkTier(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setDefaultNetworkTier(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -35403,14 +35427,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setUsageExportBucket(params: any, options?: MethodOptions):
+  setUsageExportBucket(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setUsageExportBucket(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setUsageExportBucket(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -35531,13 +35555,13 @@ export class Resource$Regionautoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -35646,11 +35670,11 @@ export class Resource$Regionautoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Autoscaler>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Autoscaler>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Autoscaler>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Autoscaler>,
       callback?: BodyResponseCallback<Schema$Autoscaler>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Autoscaler>,
       callback?: BodyResponseCallback<Schema$Autoscaler>):
       void|AxiosPromise<Schema$Autoscaler> {
@@ -35762,13 +35786,13 @@ export class Resource$Regionautoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -35891,14 +35915,14 @@ export class Resource$Regionautoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RegionAutoscalerList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RegionAutoscalerList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RegionAutoscalerList>,
       callback?: BodyResponseCallback<Schema$RegionAutoscalerList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RegionAutoscalerList>,
       callback?: BodyResponseCallback<Schema$RegionAutoscalerList>):
       void|AxiosPromise<Schema$RegionAutoscalerList> {
@@ -36014,13 +36038,13 @@ export class Resource$Regionautoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -36132,15 +36156,15 @@ export class Resource$Regionautoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -36256,13 +36280,13 @@ export class Resource$Regionautoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -36385,13 +36409,13 @@ export class Resource$Regionbackendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -36501,12 +36525,12 @@ export class Resource$Regionbackendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$BackendService>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BackendService>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BackendService>,
       callback?: BodyResponseCallback<Schema$BackendService>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BackendService>,
       callback?: BodyResponseCallback<Schema$BackendService>):
       void|AxiosPromise<Schema$BackendService> {
@@ -36619,15 +36643,15 @@ export class Resource$Regionbackendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getHealth(params: any, options?: MethodOptions):
+  getHealth(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BackendServiceGroupHealth>;
   getHealth(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$BackendServiceGroupHealth>,
       callback?: BodyResponseCallback<Schema$BackendServiceGroupHealth>): void;
   getHealth(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$BackendServiceGroupHealth>,
       callback?: BodyResponseCallback<Schema$BackendServiceGroupHealth>):
@@ -36742,13 +36766,13 @@ export class Resource$Regionbackendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -36871,14 +36895,14 @@ export class Resource$Regionbackendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BackendServiceList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BackendServiceList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BackendServiceList>,
       callback?: BodyResponseCallback<Schema$BackendServiceList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BackendServiceList>,
       callback?: BodyResponseCallback<Schema$BackendServiceList>):
       void|AxiosPromise<Schema$BackendServiceList> {
@@ -37000,13 +37024,13 @@ export class Resource$Regionbackendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -37118,15 +37142,15 @@ export class Resource$Regionbackendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -37248,13 +37272,13 @@ export class Resource$Regionbackendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -37384,15 +37408,15 @@ export class Resource$Regioncommitments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CommitmentAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$CommitmentAggregatedList>,
       callback?: BodyResponseCallback<Schema$CommitmentAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$CommitmentAggregatedList>,
       callback?: BodyResponseCallback<Schema$CommitmentAggregatedList>):
@@ -37502,11 +37526,11 @@ export class Resource$Regioncommitments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Commitment>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Commitment>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Commitment>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Commitment>,
       callback?: BodyResponseCallback<Schema$Commitment>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Commitment>,
       callback?: BodyResponseCallback<Schema$Commitment>):
       void|AxiosPromise<Schema$Commitment> {
@@ -37618,13 +37642,13 @@ export class Resource$Regioncommitments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -37747,14 +37771,14 @@ export class Resource$Regioncommitments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CommitmentList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CommitmentList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CommitmentList>,
       callback?: BodyResponseCallback<Schema$CommitmentList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CommitmentList>,
       callback?: BodyResponseCallback<Schema$CommitmentList>):
       void|AxiosPromise<Schema$CommitmentList> {
@@ -37819,14 +37843,14 @@ export class Resource$Regiondisks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  createSnapshot(params: any, options?: MethodOptions):
+  createSnapshot(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   createSnapshot(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   createSnapshot(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -37881,13 +37905,13 @@ export class Resource$Regiondisks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -37938,10 +37962,10 @@ export class Resource$Regiondisks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Disk>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Disk>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Disk>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Disk>,
       callback?: BodyResponseCallback<Schema$Disk>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Disk>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Disk>,
       callback?: BodyResponseCallback<Schema$Disk>):
       void|AxiosPromise<Schema$Disk> {
     if (typeof options === 'function') {
@@ -37994,13 +38018,13 @@ export class Resource$Regiondisks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -38054,12 +38078,13 @@ export class Resource$Regiondisks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$DiskList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$DiskList>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$DiskList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DiskList>,
       callback?: BodyResponseCallback<Schema$DiskList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DiskList>,
       callback?: BodyResponseCallback<Schema$DiskList>):
       void|AxiosPromise<Schema$DiskList> {
@@ -38111,13 +38136,13 @@ export class Resource$Regiondisks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resize(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  resize(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   resize(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   resize(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -38170,14 +38195,14 @@ export class Resource$Regiondisks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setLabels(params: any, options?: MethodOptions):
+  setLabels(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setLabels(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setLabels(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -38229,15 +38254,15 @@ export class Resource$Regiondisks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -38302,10 +38327,11 @@ export class Resource$Regiondisktypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$DiskType>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$DiskType>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$DiskType>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DiskType>,
       callback?: BodyResponseCallback<Schema$DiskType>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DiskType>,
       callback?: BodyResponseCallback<Schema$DiskType>):
       void|AxiosPromise<Schema$DiskType> {
@@ -38360,14 +38386,14 @@ export class Resource$Regiondisktypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RegionDiskTypeList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RegionDiskTypeList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RegionDiskTypeList>,
       callback?: BodyResponseCallback<Schema$RegionDiskTypeList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RegionDiskTypeList>,
       callback?: BodyResponseCallback<Schema$RegionDiskTypeList>):
       void|AxiosPromise<Schema$RegionDiskTypeList> {
@@ -38503,14 +38529,14 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  abandonInstances(params: any, options?: MethodOptions):
+  abandonInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   abandonInstances(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   abandonInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -38620,13 +38646,13 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -38750,14 +38776,14 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  deleteInstances(params: any, options?: MethodOptions):
+  deleteInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   deleteInstances(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   deleteInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -38866,12 +38892,12 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$InstanceGroupManager>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InstanceGroupManager>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InstanceGroupManager>,
       callback?: BodyResponseCallback<Schema$InstanceGroupManager>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InstanceGroupManager>,
       callback?: BodyResponseCallback<Schema$InstanceGroupManager>):
       void|AxiosPromise<Schema$InstanceGroupManager> {
@@ -38987,13 +39013,13 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -39116,16 +39142,16 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RegionInstanceGroupManagerList>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$RegionInstanceGroupManagerList>,
       callback?: BodyResponseCallback<Schema$RegionInstanceGroupManagerList>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$RegionInstanceGroupManagerList>,
       callback?: BodyResponseCallback<Schema$RegionInstanceGroupManagerList>):
@@ -39260,16 +39286,16 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listManagedInstances(params: any, options?: MethodOptions):
+  listManagedInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RegionInstanceGroupManagersListInstancesResponse>;
   listManagedInstances(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$RegionInstanceGroupManagersListInstancesResponse>,
       callback?: BodyResponseCallback<
           Schema$RegionInstanceGroupManagersListInstancesResponse>): void;
   listManagedInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$RegionInstanceGroupManagersListInstancesResponse>,
       callback?: BodyResponseCallback<
@@ -39394,13 +39420,13 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -39523,14 +39549,14 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  recreateInstances(params: any, options?: MethodOptions):
+  recreateInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   recreateInstances(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   recreateInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -39652,13 +39678,13 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resize(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  resize(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   resize(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   resize(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -39773,14 +39799,14 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setAutoHealingPolicies(params: any, options?: MethodOptions):
+  setAutoHealingPolicies(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setAutoHealingPolicies(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setAutoHealingPolicies(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -39895,14 +39921,14 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setInstanceTemplate(params: any, options?: MethodOptions):
+  setInstanceTemplate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setInstanceTemplate(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setInstanceTemplate(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -40017,14 +40043,14 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setTargetPools(params: any, options?: MethodOptions):
+  setTargetPools(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setTargetPools(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setTargetPools(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -40136,15 +40162,15 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -40265,13 +40291,13 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -40392,11 +40418,12 @@ export class Resource$Regioninstancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$InstanceGroup>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InstanceGroup>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$InstanceGroup>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InstanceGroup>,
       callback?: BodyResponseCallback<Schema$InstanceGroup>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InstanceGroup>,
       callback?: BodyResponseCallback<Schema$InstanceGroup>):
       void|AxiosPromise<Schema$InstanceGroup> {
@@ -40519,15 +40546,15 @@ export class Resource$Regioninstancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RegionInstanceGroupList>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$RegionInstanceGroupList>,
       callback?: BodyResponseCallback<Schema$RegionInstanceGroupList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$RegionInstanceGroupList>,
       callback?: BodyResponseCallback<Schema$RegionInstanceGroupList>):
@@ -40662,16 +40689,16 @@ export class Resource$Regioninstancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listInstances(params: any, options?: MethodOptions):
+  listInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RegionInstanceGroupsListInstances>;
   listInstances(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$RegionInstanceGroupsListInstances>,
       callback?:
           BodyResponseCallback<Schema$RegionInstanceGroupsListInstances>): void;
   listInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$RegionInstanceGroupsListInstances>,
       callback?:
@@ -40789,14 +40816,14 @@ export class Resource$Regioninstancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setNamedPorts(params: any, options?: MethodOptions):
+  setNamedPorts(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setNamedPorts(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setNamedPorts(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -40908,15 +40935,15 @@ export class Resource$Regioninstancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -41035,12 +41062,12 @@ export class Resource$Regionoperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -41147,11 +41174,11 @@ export class Resource$Regionoperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -41274,14 +41301,14 @@ export class Resource$Regionoperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OperationList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$OperationList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OperationList>,
       callback?: BodyResponseCallback<Schema$OperationList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$OperationList>,
       callback?: BodyResponseCallback<Schema$OperationList>):
       void|AxiosPromise<Schema$OperationList> {
@@ -41399,10 +41426,10 @@ export class Resource$Regions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Region>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Region>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Region>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Region>,
       callback?: BodyResponseCallback<Schema$Region>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Region>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Region>,
       callback?: BodyResponseCallback<Schema$Region>):
       void|AxiosPromise<Schema$Region> {
     if (typeof options === 'function') {
@@ -41518,13 +41545,13 @@ export class Resource$Regions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$RegionList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$RegionList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RegionList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RegionList>,
       callback?: BodyResponseCallback<Schema$RegionList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RegionList>,
       callback?: BodyResponseCallback<Schema$RegionList>):
       void|AxiosPromise<Schema$RegionList> {
@@ -41652,14 +41679,14 @@ export class Resource$Routers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RouterAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RouterAggregatedList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RouterAggregatedList>,
       callback?: BodyResponseCallback<Schema$RouterAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RouterAggregatedList>,
       callback?: BodyResponseCallback<Schema$RouterAggregatedList>):
       void|AxiosPromise<Schema$RouterAggregatedList> {
@@ -41768,13 +41795,13 @@ export class Resource$Routers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -41884,10 +41911,10 @@ export class Resource$Routers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Router>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Router>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Router>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Router>,
       callback?: BodyResponseCallback<Schema$Router>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Router>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Router>,
       callback?: BodyResponseCallback<Schema$Router>):
       void|AxiosPromise<Schema$Router> {
     if (typeof options === 'function') {
@@ -41995,14 +42022,14 @@ export class Resource$Routers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getRouterStatus(params: any, options?: MethodOptions):
+  getRouterStatus(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RouterStatusResponse>;
   getRouterStatus(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RouterStatusResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RouterStatusResponse>,
       callback?: BodyResponseCallback<Schema$RouterStatusResponse>): void;
   getRouterStatus(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RouterStatusResponse>,
       callback?: BodyResponseCallback<Schema$RouterStatusResponse>):
       void|AxiosPromise<Schema$RouterStatusResponse> {
@@ -42114,13 +42141,13 @@ export class Resource$Routers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -42242,13 +42269,13 @@ export class Resource$Routers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$RouterList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$RouterList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RouterList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RouterList>,
       callback?: BodyResponseCallback<Schema$RouterList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RouterList>,
       callback?: BodyResponseCallback<Schema$RouterList>):
       void|AxiosPromise<Schema$RouterList> {
@@ -42366,13 +42393,13 @@ export class Resource$Routers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -42487,15 +42514,15 @@ export class Resource$Routers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  preview(params: any, options?: MethodOptions):
+  preview(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RoutersPreviewResponse>;
   preview(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$RoutersPreviewResponse>,
       callback?: BodyResponseCallback<Schema$RoutersPreviewResponse>): void;
   preview(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$RoutersPreviewResponse>,
       callback?: BodyResponseCallback<Schema$RoutersPreviewResponse>):
@@ -42610,15 +42637,15 @@ export class Resource$Routers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -42737,13 +42764,13 @@ export class Resource$Routers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -42861,13 +42888,13 @@ export class Resource$Routes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -42972,10 +42999,10 @@ export class Resource$Routes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Route>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Route>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Route>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Route>,
       callback?: BodyResponseCallback<Schema$Route>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Route>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Route>,
       callback?: BodyResponseCallback<Schema$Route>):
       void|AxiosPromise<Schema$Route> {
     if (typeof options === 'function') {
@@ -43081,13 +43108,13 @@ export class Resource$Routes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -43204,13 +43231,13 @@ export class Resource$Routes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$RouteList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$RouteList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RouteList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RouteList>,
       callback?: BodyResponseCallback<Schema$RouteList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RouteList>,
       callback?: BodyResponseCallback<Schema$RouteList>):
       void|AxiosPromise<Schema$RouteList> {
@@ -43318,15 +43345,15 @@ export class Resource$Routes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -43390,13 +43417,14 @@ export class Resource$Securitypolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  addRule(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  addRule(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Operation>;
   addRule(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   addRule(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -43503,13 +43531,13 @@ export class Resource$Securitypolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -43615,12 +43643,12 @@ export class Resource$Securitypolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$SecurityPolicy>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SecurityPolicy>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SecurityPolicy>,
       callback?: BodyResponseCallback<Schema$SecurityPolicy>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SecurityPolicy>,
       callback?: BodyResponseCallback<Schema$SecurityPolicy>):
       void|AxiosPromise<Schema$SecurityPolicy> {
@@ -43671,14 +43699,14 @@ export class Resource$Securitypolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getRule(params: any, options?: MethodOptions):
+  getRule(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SecurityPolicyRule>;
   getRule(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SecurityPolicyRule>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SecurityPolicyRule>,
       callback?: BodyResponseCallback<Schema$SecurityPolicyRule>): void;
   getRule(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SecurityPolicyRule>,
       callback?: BodyResponseCallback<Schema$SecurityPolicyRule>):
       void|AxiosPromise<Schema$SecurityPolicyRule> {
@@ -43786,13 +43814,13 @@ export class Resource$Securitypolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -43910,14 +43938,14 @@ export class Resource$Securitypolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SecurityPolicyList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SecurityPolicyList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SecurityPolicyList>,
       callback?: BodyResponseCallback<Schema$SecurityPolicyList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SecurityPolicyList>,
       callback?: BodyResponseCallback<Schema$SecurityPolicyList>):
       void|AxiosPromise<Schema$SecurityPolicyList> {
@@ -44030,13 +44058,13 @@ export class Resource$Securitypolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -44088,14 +44116,14 @@ export class Resource$Securitypolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patchRule(params: any, options?: MethodOptions):
+  patchRule(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   patchRule(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patchRule(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -44146,14 +44174,14 @@ export class Resource$Securitypolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  removeRule(params: any, options?: MethodOptions):
+  removeRule(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   removeRule(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   removeRule(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -44261,15 +44289,15 @@ export class Resource$Securitypolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -44392,13 +44420,13 @@ export class Resource$Snapshots {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -44504,10 +44532,11 @@ export class Resource$Snapshots {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Snapshot>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Snapshot>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Snapshot>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Snapshot>,
       callback?: BodyResponseCallback<Schema$Snapshot>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Snapshot>,
       callback?: BodyResponseCallback<Schema$Snapshot>):
       void|AxiosPromise<Schema$Snapshot> {
@@ -44626,13 +44655,14 @@ export class Resource$Snapshots {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$SnapshotList>;
+  list(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$SnapshotList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SnapshotList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SnapshotList>,
       callback?: BodyResponseCallback<Schema$SnapshotList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SnapshotList>,
       callback?: BodyResponseCallback<Schema$SnapshotList>):
       void|AxiosPromise<Schema$SnapshotList> {
@@ -44741,14 +44771,14 @@ export class Resource$Snapshots {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setLabels(params: any, options?: MethodOptions):
+  setLabels(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setLabels(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setLabels(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -44858,15 +44888,15 @@ export class Resource$Snapshots {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -44986,13 +45016,13 @@ export class Resource$Sslcertificates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -45099,12 +45129,12 @@ export class Resource$Sslcertificates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$SslCertificate>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SslCertificate>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SslCertificate>,
       callback?: BodyResponseCallback<Schema$SslCertificate>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SslCertificate>,
       callback?: BodyResponseCallback<Schema$SslCertificate>):
       void|AxiosPromise<Schema$SslCertificate> {
@@ -45212,13 +45242,13 @@ export class Resource$Sslcertificates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -45336,14 +45366,14 @@ export class Resource$Sslcertificates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SslCertificateList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SslCertificateList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SslCertificateList>,
       callback?: BodyResponseCallback<Schema$SslCertificateList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SslCertificateList>,
       callback?: BodyResponseCallback<Schema$SslCertificateList>):
       void|AxiosPromise<Schema$SslCertificateList> {
@@ -45450,15 +45480,15 @@ export class Resource$Sslcertificates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -45524,13 +45554,13 @@ export class Resource$Sslpolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -45580,11 +45610,11 @@ export class Resource$Sslpolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$SslPolicy>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SslPolicy>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$SslPolicy>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SslPolicy>,
       callback?: BodyResponseCallback<Schema$SslPolicy>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SslPolicy>,
       callback?: BodyResponseCallback<Schema$SslPolicy>):
       void|AxiosPromise<Schema$SslPolicy> {
@@ -45636,13 +45666,13 @@ export class Resource$Sslpolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -45695,14 +45725,14 @@ export class Resource$Sslpolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SslPoliciesList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SslPoliciesList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SslPoliciesList>,
       callback?: BodyResponseCallback<Schema$SslPoliciesList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SslPoliciesList>,
       callback?: BodyResponseCallback<Schema$SslPoliciesList>):
       void|AxiosPromise<Schema$SslPoliciesList> {
@@ -45755,16 +45785,16 @@ export class Resource$Sslpolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listAvailableFeatures(params: any, options?: MethodOptions):
+  listAvailableFeatures(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SslPoliciesListAvailableFeaturesResponse>;
   listAvailableFeatures(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SslPoliciesListAvailableFeaturesResponse>,
       callback?: BodyResponseCallback<
           Schema$SslPoliciesListAvailableFeaturesResponse>): void;
   listAvailableFeatures(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SslPoliciesListAvailableFeaturesResponse>,
       callback?: BodyResponseCallback<
@@ -45821,13 +45851,13 @@ export class Resource$Sslpolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -45878,15 +45908,15 @@ export class Resource$Sslpolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -46017,15 +46047,15 @@ export class Resource$Subnetworks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SubnetworkAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SubnetworkAggregatedList>,
       callback?: BodyResponseCallback<Schema$SubnetworkAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SubnetworkAggregatedList>,
       callback?: BodyResponseCallback<Schema$SubnetworkAggregatedList>):
@@ -46135,13 +46165,13 @@ export class Resource$Subnetworks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -46256,14 +46286,14 @@ export class Resource$Subnetworks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  expandIpCidrRange(params: any, options?: MethodOptions):
+  expandIpCidrRange(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   expandIpCidrRange(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   expandIpCidrRange(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -46373,11 +46403,11 @@ export class Resource$Subnetworks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Subnetwork>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Subnetwork>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Subnetwork>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Subnetwork>,
       callback?: BodyResponseCallback<Schema$Subnetwork>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Subnetwork>,
       callback?: BodyResponseCallback<Schema$Subnetwork>):
       void|AxiosPromise<Schema$Subnetwork> {
@@ -46487,13 +46517,13 @@ export class Resource$Subnetworks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -46604,13 +46634,13 @@ export class Resource$Subnetworks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -46732,14 +46762,14 @@ export class Resource$Subnetworks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SubnetworkList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SubnetworkList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SubnetworkList>,
       callback?: BodyResponseCallback<Schema$SubnetworkList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SubnetworkList>,
       callback?: BodyResponseCallback<Schema$SubnetworkList>):
       void|AxiosPromise<Schema$SubnetworkList> {
@@ -46792,16 +46822,16 @@ export class Resource$Subnetworks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listUsable(params: any, options?: MethodOptions):
+  listUsable(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$UsableSubnetworksAggregatedList>;
   listUsable(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$UsableSubnetworksAggregatedList>,
       callback?: BodyResponseCallback<Schema$UsableSubnetworksAggregatedList>):
       void;
   listUsable(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$UsableSubnetworksAggregatedList>,
       callback?: BodyResponseCallback<Schema$UsableSubnetworksAggregatedList>):
@@ -46925,13 +46955,13 @@ export class Resource$Subnetworks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -47046,13 +47076,13 @@ export class Resource$Subnetworks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -47165,14 +47195,14 @@ export class Resource$Subnetworks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setPrivateIpGoogleAccess(params: any, options?: MethodOptions):
+  setPrivateIpGoogleAccess(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setPrivateIpGoogleAccess(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setPrivateIpGoogleAccess(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -47286,15 +47316,15 @@ export class Resource$Subnetworks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -47414,13 +47444,13 @@ export class Resource$Targethttpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -47527,12 +47557,12 @@ export class Resource$Targethttpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$TargetHttpProxy>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetHttpProxy>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetHttpProxy>,
       callback?: BodyResponseCallback<Schema$TargetHttpProxy>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetHttpProxy>,
       callback?: BodyResponseCallback<Schema$TargetHttpProxy>):
       void|AxiosPromise<Schema$TargetHttpProxy> {
@@ -47640,13 +47670,13 @@ export class Resource$Targethttpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -47764,14 +47794,14 @@ export class Resource$Targethttpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetHttpProxyList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetHttpProxyList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetHttpProxyList>,
       callback?: BodyResponseCallback<Schema$TargetHttpProxyList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetHttpProxyList>,
       callback?: BodyResponseCallback<Schema$TargetHttpProxyList>):
       void|AxiosPromise<Schema$TargetHttpProxyList> {
@@ -47882,14 +47912,14 @@ export class Resource$Targethttpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setUrlMap(params: any, options?: MethodOptions):
+  setUrlMap(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setUrlMap(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setUrlMap(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -47997,15 +48027,15 @@ export class Resource$Targethttpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -48125,13 +48155,13 @@ export class Resource$Targethttpsproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -48238,12 +48268,12 @@ export class Resource$Targethttpsproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$TargetHttpsProxy>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetHttpsProxy>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetHttpsProxy>,
       callback?: BodyResponseCallback<Schema$TargetHttpsProxy>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetHttpsProxy>,
       callback?: BodyResponseCallback<Schema$TargetHttpsProxy>):
       void|AxiosPromise<Schema$TargetHttpsProxy> {
@@ -48351,13 +48381,13 @@ export class Resource$Targethttpsproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -48475,14 +48505,14 @@ export class Resource$Targethttpsproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetHttpsProxyList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetHttpsProxyList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetHttpsProxyList>,
       callback?: BodyResponseCallback<Schema$TargetHttpsProxyList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetHttpsProxyList>,
       callback?: BodyResponseCallback<Schema$TargetHttpsProxyList>):
       void|AxiosPromise<Schema$TargetHttpsProxyList> {
@@ -48533,14 +48563,14 @@ export class Resource$Targethttpsproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setQuicOverride(params: any, options?: MethodOptions):
+  setQuicOverride(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setQuicOverride(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setQuicOverride(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -48650,14 +48680,14 @@ export class Resource$Targethttpsproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setSslCertificates(params: any, options?: MethodOptions):
+  setSslCertificates(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setSslCertificates(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setSslCertificates(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -48712,14 +48742,14 @@ export class Resource$Targethttpsproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setSslPolicy(params: any, options?: MethodOptions):
+  setSslPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setSslPolicy(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setSslPolicy(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -48831,14 +48861,14 @@ export class Resource$Targethttpsproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setUrlMap(params: any, options?: MethodOptions):
+  setUrlMap(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setUrlMap(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setUrlMap(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -48946,15 +48976,15 @@ export class Resource$Targethttpsproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -49085,16 +49115,16 @@ export class Resource$Targetinstances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetInstanceAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TargetInstanceAggregatedList>,
       callback?: BodyResponseCallback<Schema$TargetInstanceAggregatedList>):
       void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TargetInstanceAggregatedList>,
       callback?: BodyResponseCallback<Schema$TargetInstanceAggregatedList>):
@@ -49206,13 +49236,13 @@ export class Resource$Targetinstances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -49323,12 +49353,12 @@ export class Resource$Targetinstances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$TargetInstance>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetInstance>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetInstance>,
       callback?: BodyResponseCallback<Schema$TargetInstance>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetInstance>,
       callback?: BodyResponseCallback<Schema$TargetInstance>):
       void|AxiosPromise<Schema$TargetInstance> {
@@ -49440,13 +49470,13 @@ export class Resource$Targetinstances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -49569,14 +49599,14 @@ export class Resource$Targetinstances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetInstanceList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetInstanceList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetInstanceList>,
       callback?: BodyResponseCallback<Schema$TargetInstanceList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetInstanceList>,
       callback?: BodyResponseCallback<Schema$TargetInstanceList>):
       void|AxiosPromise<Schema$TargetInstanceList> {
@@ -49688,15 +49718,15 @@ export class Resource$Targetinstances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -49824,14 +49854,14 @@ export class Resource$Targetpools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  addHealthCheck(params: any, options?: MethodOptions):
+  addHealthCheck(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   addHealthCheck(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   addHealthCheck(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -49946,14 +49976,14 @@ export class Resource$Targetpools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  addInstance(params: any, options?: MethodOptions):
+  addInstance(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   addInstance(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   addInstance(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -50071,15 +50101,15 @@ export class Resource$Targetpools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetPoolAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TargetPoolAggregatedList>,
       callback?: BodyResponseCallback<Schema$TargetPoolAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TargetPoolAggregatedList>,
       callback?: BodyResponseCallback<Schema$TargetPoolAggregatedList>):
@@ -50189,13 +50219,13 @@ export class Resource$Targetpools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -50305,11 +50335,11 @@ export class Resource$Targetpools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$TargetPool>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetPool>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$TargetPool>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetPool>,
       callback?: BodyResponseCallback<Schema$TargetPool>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetPool>,
       callback?: BodyResponseCallback<Schema$TargetPool>):
       void|AxiosPromise<Schema$TargetPool> {
@@ -50424,15 +50454,15 @@ export class Resource$Targetpools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getHealth(params: any, options?: MethodOptions):
+  getHealth(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetPoolInstanceHealth>;
   getHealth(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TargetPoolInstanceHealth>,
       callback?: BodyResponseCallback<Schema$TargetPoolInstanceHealth>): void;
   getHealth(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TargetPoolInstanceHealth>,
       callback?: BodyResponseCallback<Schema$TargetPoolInstanceHealth>):
@@ -50545,13 +50575,13 @@ export class Resource$Targetpools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -50674,14 +50704,14 @@ export class Resource$Targetpools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetPoolList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetPoolList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetPoolList>,
       callback?: BodyResponseCallback<Schema$TargetPoolList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetPoolList>,
       callback?: BodyResponseCallback<Schema$TargetPoolList>):
       void|AxiosPromise<Schema$TargetPoolList> {
@@ -50796,14 +50826,14 @@ export class Resource$Targetpools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  removeHealthCheck(params: any, options?: MethodOptions):
+  removeHealthCheck(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   removeHealthCheck(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   removeHealthCheck(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -50918,14 +50948,14 @@ export class Resource$Targetpools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  removeInstance(params: any, options?: MethodOptions):
+  removeInstance(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   removeInstance(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   removeInstance(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -51041,14 +51071,14 @@ export class Resource$Targetpools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setBackup(params: any, options?: MethodOptions):
+  setBackup(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setBackup(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setBackup(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -51162,15 +51192,15 @@ export class Resource$Targetpools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -51290,13 +51320,13 @@ export class Resource$Targetsslproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -51403,12 +51433,12 @@ export class Resource$Targetsslproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$TargetSslProxy>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetSslProxy>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetSslProxy>,
       callback?: BodyResponseCallback<Schema$TargetSslProxy>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetSslProxy>,
       callback?: BodyResponseCallback<Schema$TargetSslProxy>):
       void|AxiosPromise<Schema$TargetSslProxy> {
@@ -51516,13 +51546,13 @@ export class Resource$Targetsslproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -51640,14 +51670,14 @@ export class Resource$Targetsslproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetSslProxyList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetSslProxyList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetSslProxyList>,
       callback?: BodyResponseCallback<Schema$TargetSslProxyList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetSslProxyList>,
       callback?: BodyResponseCallback<Schema$TargetSslProxyList>):
       void|AxiosPromise<Schema$TargetSslProxyList> {
@@ -51756,14 +51786,14 @@ export class Resource$Targetsslproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setBackendService(params: any, options?: MethodOptions):
+  setBackendService(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setBackendService(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setBackendService(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -51873,14 +51903,14 @@ export class Resource$Targetsslproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setProxyHeader(params: any, options?: MethodOptions):
+  setProxyHeader(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setProxyHeader(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setProxyHeader(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -51990,14 +52020,14 @@ export class Resource$Targetsslproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setSslCertificates(params: any, options?: MethodOptions):
+  setSslCertificates(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setSslCertificates(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setSslCertificates(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -52052,14 +52082,14 @@ export class Resource$Targetsslproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setSslPolicy(params: any, options?: MethodOptions):
+  setSslPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setSslPolicy(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setSslPolicy(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -52167,15 +52197,15 @@ export class Resource$Targetsslproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -52295,13 +52325,13 @@ export class Resource$Targettcpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -52408,12 +52438,12 @@ export class Resource$Targettcpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$TargetTcpProxy>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetTcpProxy>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetTcpProxy>,
       callback?: BodyResponseCallback<Schema$TargetTcpProxy>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetTcpProxy>,
       callback?: BodyResponseCallback<Schema$TargetTcpProxy>):
       void|AxiosPromise<Schema$TargetTcpProxy> {
@@ -52521,13 +52551,13 @@ export class Resource$Targettcpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -52645,14 +52675,14 @@ export class Resource$Targettcpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetTcpProxyList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetTcpProxyList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetTcpProxyList>,
       callback?: BodyResponseCallback<Schema$TargetTcpProxyList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetTcpProxyList>,
       callback?: BodyResponseCallback<Schema$TargetTcpProxyList>):
       void|AxiosPromise<Schema$TargetTcpProxyList> {
@@ -52761,14 +52791,14 @@ export class Resource$Targettcpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setBackendService(params: any, options?: MethodOptions):
+  setBackendService(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setBackendService(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setBackendService(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -52878,14 +52908,14 @@ export class Resource$Targettcpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setProxyHeader(params: any, options?: MethodOptions):
+  setProxyHeader(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setProxyHeader(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setProxyHeader(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -53015,16 +53045,16 @@ export class Resource$Targetvpngateways {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetVpnGatewayAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TargetVpnGatewayAggregatedList>,
       callback?: BodyResponseCallback<Schema$TargetVpnGatewayAggregatedList>):
       void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TargetVpnGatewayAggregatedList>,
       callback?: BodyResponseCallback<Schema$TargetVpnGatewayAggregatedList>):
@@ -53138,13 +53168,13 @@ export class Resource$Targetvpngateways {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -53255,12 +53285,12 @@ export class Resource$Targetvpngateways {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$TargetVpnGateway>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetVpnGateway>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetVpnGateway>,
       callback?: BodyResponseCallback<Schema$TargetVpnGateway>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetVpnGateway>,
       callback?: BodyResponseCallback<Schema$TargetVpnGateway>):
       void|AxiosPromise<Schema$TargetVpnGateway> {
@@ -53372,13 +53402,13 @@ export class Resource$Targetvpngateways {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -53501,14 +53531,14 @@ export class Resource$Targetvpngateways {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetVpnGatewayList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetVpnGatewayList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetVpnGatewayList>,
       callback?: BodyResponseCallback<Schema$TargetVpnGatewayList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetVpnGatewayList>,
       callback?: BodyResponseCallback<Schema$TargetVpnGatewayList>):
       void|AxiosPromise<Schema$TargetVpnGatewayList> {
@@ -53562,14 +53592,14 @@ export class Resource$Targetvpngateways {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setLabels(params: any, options?: MethodOptions):
+  setLabels(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setLabels(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setLabels(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -53681,15 +53711,15 @@ export class Resource$Targetvpngateways {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -53808,13 +53838,13 @@ export class Resource$Urlmaps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -53919,10 +53949,10 @@ export class Resource$Urlmaps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$UrlMap>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$UrlMap>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$UrlMap>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$UrlMap>,
       callback?: BodyResponseCallback<Schema$UrlMap>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$UrlMap>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$UrlMap>,
       callback?: BodyResponseCallback<Schema$UrlMap>):
       void|AxiosPromise<Schema$UrlMap> {
     if (typeof options === 'function') {
@@ -54028,13 +54058,13 @@ export class Resource$Urlmaps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -54144,14 +54174,14 @@ export class Resource$Urlmaps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  invalidateCache(params: any, options?: MethodOptions):
+  invalidateCache(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   invalidateCache(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   invalidateCache(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -54270,13 +54300,13 @@ export class Resource$Urlmaps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$UrlMapList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$UrlMapList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UrlMapList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UrlMapList>,
       callback?: BodyResponseCallback<Schema$UrlMapList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UrlMapList>,
       callback?: BodyResponseCallback<Schema$UrlMapList>):
       void|AxiosPromise<Schema$UrlMapList> {
@@ -54389,13 +54419,13 @@ export class Resource$Urlmaps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -54504,15 +54534,15 @@ export class Resource$Urlmaps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -54627,13 +54657,13 @@ export class Resource$Urlmaps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -54744,15 +54774,15 @@ export class Resource$Urlmaps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  validate(params: any, options?: MethodOptions):
+  validate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$UrlMapsValidateResponse>;
   validate(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$UrlMapsValidateResponse>,
       callback?: BodyResponseCallback<Schema$UrlMapsValidateResponse>): void;
   validate(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$UrlMapsValidateResponse>,
       callback?: BodyResponseCallback<Schema$UrlMapsValidateResponse>):
@@ -54883,15 +54913,15 @@ export class Resource$Vpntunnels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$VpnTunnelAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$VpnTunnelAggregatedList>,
       callback?: BodyResponseCallback<Schema$VpnTunnelAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$VpnTunnelAggregatedList>,
       callback?: BodyResponseCallback<Schema$VpnTunnelAggregatedList>):
@@ -55001,13 +55031,13 @@ export class Resource$Vpntunnels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -55117,11 +55147,11 @@ export class Resource$Vpntunnels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$VpnTunnel>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$VpnTunnel>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$VpnTunnel>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$VpnTunnel>,
       callback?: BodyResponseCallback<Schema$VpnTunnel>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$VpnTunnel>,
       callback?: BodyResponseCallback<Schema$VpnTunnel>):
       void|AxiosPromise<Schema$VpnTunnel> {
@@ -55233,13 +55263,13 @@ export class Resource$Vpntunnels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -55362,14 +55392,14 @@ export class Resource$Vpntunnels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$VpnTunnelList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$VpnTunnelList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$VpnTunnelList>,
       callback?: BodyResponseCallback<Schema$VpnTunnelList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$VpnTunnelList>,
       callback?: BodyResponseCallback<Schema$VpnTunnelList>):
       void|AxiosPromise<Schema$VpnTunnelList> {
@@ -55423,14 +55453,14 @@ export class Resource$Vpntunnels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setLabels(params: any, options?: MethodOptions):
+  setLabels(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setLabels(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setLabels(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -55544,15 +55574,15 @@ export class Resource$Vpntunnels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -55671,12 +55701,12 @@ export class Resource$Zoneoperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -55783,11 +55813,11 @@ export class Resource$Zoneoperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -55910,14 +55940,14 @@ export class Resource$Zoneoperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OperationList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$OperationList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OperationList>,
       callback?: BodyResponseCallback<Schema$OperationList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$OperationList>,
       callback?: BodyResponseCallback<Schema$OperationList>):
       void|AxiosPromise<Schema$OperationList> {
@@ -56034,10 +56064,10 @@ export class Resource$Zones {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Zone>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Zone>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Zone>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Zone>,
       callback?: BodyResponseCallback<Schema$Zone>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Zone>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Zone>,
       callback?: BodyResponseCallback<Schema$Zone>):
       void|AxiosPromise<Schema$Zone> {
     if (typeof options === 'function') {
@@ -56153,12 +56183,13 @@ export class Resource$Zones {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$ZoneList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$ZoneList>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$ZoneList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ZoneList>,
       callback?: BodyResponseCallback<Schema$ZoneList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ZoneList>,
       callback?: BodyResponseCallback<Schema$ZoneList>):
       void|AxiosPromise<Schema$ZoneList> {
diff --git a/src/apis/compute/v1.ts b/src/apis/compute/v1.ts
index 8435a48e38..49711efd9a 100644
--- a/src/apis/compute/v1.ts
+++ b/src/apis/compute/v1.ts
@@ -8458,16 +8458,16 @@ export class Resource$Acceleratortypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AcceleratorTypeAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AcceleratorTypeAggregatedList>,
       callback?: BodyResponseCallback<Schema$AcceleratorTypeAggregatedList>):
       void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AcceleratorTypeAggregatedList>,
       callback?: BodyResponseCallback<Schema$AcceleratorTypeAggregatedList>):
@@ -8579,12 +8579,12 @@ export class Resource$Acceleratortypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$AcceleratorType>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AcceleratorType>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AcceleratorType>,
       callback?: BodyResponseCallback<Schema$AcceleratorType>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AcceleratorType>,
       callback?: BodyResponseCallback<Schema$AcceleratorType>):
       void|AxiosPromise<Schema$AcceleratorType> {
@@ -8707,14 +8707,14 @@ export class Resource$Acceleratortypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AcceleratorTypeList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AcceleratorTypeList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AcceleratorTypeList>,
       callback?: BodyResponseCallback<Schema$AcceleratorTypeList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AcceleratorTypeList>,
       callback?: BodyResponseCallback<Schema$AcceleratorTypeList>):
       void|AxiosPromise<Schema$AcceleratorTypeList> {
@@ -8844,14 +8844,15 @@ export class Resource$Addresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AddressAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AddressAggregatedList>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$AddressAggregatedList>,
       callback?: BodyResponseCallback<Schema$AddressAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AddressAggregatedList>,
       callback?: BodyResponseCallback<Schema$AddressAggregatedList>):
@@ -8961,13 +8962,13 @@ export class Resource$Addresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -9076,10 +9077,12 @@ export class Resource$Addresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Address>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Address>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Address>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Address>,
       callback?: BodyResponseCallback<Schema$Address>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Address>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Address>,
       callback?: BodyResponseCallback<Schema$Address>):
       void|AxiosPromise<Schema$Address> {
     if (typeof options === 'function') {
@@ -9190,13 +9193,13 @@ export class Resource$Addresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -9317,13 +9320,13 @@ export class Resource$Addresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$AddressList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$AddressList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AddressList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AddressList>,
       callback?: BodyResponseCallback<Schema$AddressList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AddressList>,
       callback?: BodyResponseCallback<Schema$AddressList>):
       void|AxiosPromise<Schema$AddressList> {
@@ -9452,15 +9455,15 @@ export class Resource$Autoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AutoscalerAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AutoscalerAggregatedList>,
       callback?: BodyResponseCallback<Schema$AutoscalerAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AutoscalerAggregatedList>,
       callback?: BodyResponseCallback<Schema$AutoscalerAggregatedList>):
@@ -9570,13 +9573,13 @@ export class Resource$Autoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -9686,11 +9689,11 @@ export class Resource$Autoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Autoscaler>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Autoscaler>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Autoscaler>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Autoscaler>,
       callback?: BodyResponseCallback<Schema$Autoscaler>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Autoscaler>,
       callback?: BodyResponseCallback<Schema$Autoscaler>):
       void|AxiosPromise<Schema$Autoscaler> {
@@ -9802,13 +9805,13 @@ export class Resource$Autoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -9929,14 +9932,14 @@ export class Resource$Autoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AutoscalerList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AutoscalerList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AutoscalerList>,
       callback?: BodyResponseCallback<Schema$AutoscalerList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AutoscalerList>,
       callback?: BodyResponseCallback<Schema$AutoscalerList>):
       void|AxiosPromise<Schema$AutoscalerList> {
@@ -10051,13 +10054,13 @@ export class Resource$Autoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -10171,13 +10174,13 @@ export class Resource$Autoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -10294,13 +10297,13 @@ export class Resource$Backendbuckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -10406,11 +10409,12 @@ export class Resource$Backendbuckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$BackendBucket>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BackendBucket>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$BackendBucket>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BackendBucket>,
       callback?: BodyResponseCallback<Schema$BackendBucket>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BackendBucket>,
       callback?: BodyResponseCallback<Schema$BackendBucket>):
       void|AxiosPromise<Schema$BackendBucket> {
@@ -10518,13 +10522,13 @@ export class Resource$Backendbuckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -10642,14 +10646,14 @@ export class Resource$Backendbuckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BackendBucketList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BackendBucketList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BackendBucketList>,
       callback?: BodyResponseCallback<Schema$BackendBucketList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BackendBucketList>,
       callback?: BodyResponseCallback<Schema$BackendBucketList>):
       void|AxiosPromise<Schema$BackendBucketList> {
@@ -10763,13 +10767,13 @@ export class Resource$Backendbuckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -10883,13 +10887,13 @@ export class Resource$Backendbuckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -11020,16 +11024,16 @@ export class Resource$Backendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BackendServiceAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$BackendServiceAggregatedList>,
       callback?: BodyResponseCallback<Schema$BackendServiceAggregatedList>):
       void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$BackendServiceAggregatedList>,
       callback?: BodyResponseCallback<Schema$BackendServiceAggregatedList>):
@@ -11137,13 +11141,13 @@ export class Resource$Backendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -11250,12 +11254,12 @@ export class Resource$Backendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$BackendService>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BackendService>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BackendService>,
       callback?: BodyResponseCallback<Schema$BackendService>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BackendService>,
       callback?: BodyResponseCallback<Schema$BackendService>):
       void|AxiosPromise<Schema$BackendService> {
@@ -11365,15 +11369,15 @@ export class Resource$Backendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getHealth(params: any, options?: MethodOptions):
+  getHealth(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BackendServiceGroupHealth>;
   getHealth(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$BackendServiceGroupHealth>,
       callback?: BodyResponseCallback<Schema$BackendServiceGroupHealth>): void;
   getHealth(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$BackendServiceGroupHealth>,
       callback?: BodyResponseCallback<Schema$BackendServiceGroupHealth>):
@@ -11484,13 +11488,13 @@ export class Resource$Backendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -11608,14 +11612,14 @@ export class Resource$Backendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BackendServiceList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BackendServiceList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BackendServiceList>,
       callback?: BodyResponseCallback<Schema$BackendServiceList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BackendServiceList>,
       callback?: BodyResponseCallback<Schema$BackendServiceList>):
       void|AxiosPromise<Schema$BackendServiceList> {
@@ -11732,13 +11736,13 @@ export class Resource$Backendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -11855,13 +11859,13 @@ export class Resource$Backendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -11991,14 +11995,14 @@ export class Resource$Disks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DiskAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DiskAggregatedList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DiskAggregatedList>,
       callback?: BodyResponseCallback<Schema$DiskAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DiskAggregatedList>,
       callback?: BodyResponseCallback<Schema$DiskAggregatedList>):
       void|AxiosPromise<Schema$DiskAggregatedList> {
@@ -12112,14 +12116,14 @@ export class Resource$Disks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  createSnapshot(params: any, options?: MethodOptions):
+  createSnapshot(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   createSnapshot(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   createSnapshot(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -12232,13 +12236,13 @@ export class Resource$Disks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -12347,10 +12351,10 @@ export class Resource$Disks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Disk>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Disk>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Disk>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Disk>,
       callback?: BodyResponseCallback<Schema$Disk>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Disk>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Disk>,
       callback?: BodyResponseCallback<Schema$Disk>):
       void|AxiosPromise<Schema$Disk> {
     if (typeof options === 'function') {
@@ -12464,13 +12468,13 @@ export class Resource$Disks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -12591,12 +12595,13 @@ export class Resource$Disks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$DiskList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$DiskList>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$DiskList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DiskList>,
       callback?: BodyResponseCallback<Schema$DiskList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DiskList>,
       callback?: BodyResponseCallback<Schema$DiskList>):
       void|AxiosPromise<Schema$DiskList> {
@@ -12710,13 +12715,13 @@ export class Resource$Disks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resize(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  resize(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   resize(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   resize(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -12832,14 +12837,14 @@ export class Resource$Disks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setLabels(params: any, options?: MethodOptions):
+  setLabels(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setLabels(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setLabels(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -12969,15 +12974,15 @@ export class Resource$Disktypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DiskTypeAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$DiskTypeAggregatedList>,
       callback?: BodyResponseCallback<Schema$DiskTypeAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$DiskTypeAggregatedList>,
       callback?: BodyResponseCallback<Schema$DiskTypeAggregatedList>):
@@ -13087,10 +13092,11 @@ export class Resource$Disktypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$DiskType>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$DiskType>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$DiskType>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DiskType>,
       callback?: BodyResponseCallback<Schema$DiskType>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DiskType>,
       callback?: BodyResponseCallback<Schema$DiskType>):
       void|AxiosPromise<Schema$DiskType> {
@@ -13212,13 +13218,14 @@ export class Resource$Disktypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$DiskTypeList>;
+  list(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$DiskTypeList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DiskTypeList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DiskTypeList>,
       callback?: BodyResponseCallback<Schema$DiskTypeList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DiskTypeList>,
       callback?: BodyResponseCallback<Schema$DiskTypeList>):
       void|AxiosPromise<Schema$DiskTypeList> {
@@ -13335,13 +13342,13 @@ export class Resource$Firewalls {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -13445,10 +13452,11 @@ export class Resource$Firewalls {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Firewall>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Firewall>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Firewall>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Firewall>,
       callback?: BodyResponseCallback<Schema$Firewall>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Firewall>,
       callback?: BodyResponseCallback<Schema$Firewall>):
       void|AxiosPromise<Schema$Firewall> {
@@ -13555,13 +13563,13 @@ export class Resource$Firewalls {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -13678,13 +13686,14 @@ export class Resource$Firewalls {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$FirewallList>;
+  list(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$FirewallList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$FirewallList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$FirewallList>,
       callback?: BodyResponseCallback<Schema$FirewallList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$FirewallList>,
       callback?: BodyResponseCallback<Schema$FirewallList>):
       void|AxiosPromise<Schema$FirewallList> {
@@ -13797,13 +13806,13 @@ export class Resource$Firewalls {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -13917,13 +13926,13 @@ export class Resource$Firewalls {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -14052,16 +14061,16 @@ export class Resource$Forwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ForwardingRuleAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ForwardingRuleAggregatedList>,
       callback?: BodyResponseCallback<Schema$ForwardingRuleAggregatedList>):
       void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ForwardingRuleAggregatedList>,
       callback?: BodyResponseCallback<Schema$ForwardingRuleAggregatedList>):
@@ -14173,13 +14182,13 @@ export class Resource$Forwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -14289,12 +14298,12 @@ export class Resource$Forwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$ForwardingRule>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ForwardingRule>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ForwardingRule>,
       callback?: BodyResponseCallback<Schema$ForwardingRule>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ForwardingRule>,
       callback?: BodyResponseCallback<Schema$ForwardingRule>):
       void|AxiosPromise<Schema$ForwardingRule> {
@@ -14406,13 +14415,13 @@ export class Resource$Forwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -14535,14 +14544,14 @@ export class Resource$Forwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ForwardingRuleList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ForwardingRuleList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ForwardingRuleList>,
       callback?: BodyResponseCallback<Schema$ForwardingRuleList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ForwardingRuleList>,
       callback?: BodyResponseCallback<Schema$ForwardingRuleList>):
       void|AxiosPromise<Schema$ForwardingRuleList> {
@@ -14659,14 +14668,14 @@ export class Resource$Forwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setTarget(params: any, options?: MethodOptions):
+  setTarget(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setTarget(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setTarget(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -14784,13 +14793,13 @@ export class Resource$Globaladdresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -14895,10 +14904,12 @@ export class Resource$Globaladdresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Address>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Address>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Address>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Address>,
       callback?: BodyResponseCallback<Schema$Address>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Address>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Address>,
       callback?: BodyResponseCallback<Schema$Address>):
       void|AxiosPromise<Schema$Address> {
     if (typeof options === 'function') {
@@ -15004,13 +15015,13 @@ export class Resource$Globaladdresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -15126,13 +15137,13 @@ export class Resource$Globaladdresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$AddressList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$AddressList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AddressList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AddressList>,
       callback?: BodyResponseCallback<Schema$AddressList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AddressList>,
       callback?: BodyResponseCallback<Schema$AddressList>):
       void|AxiosPromise<Schema$AddressList> {
@@ -15249,13 +15260,13 @@ export class Resource$Globalforwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -15362,12 +15373,12 @@ export class Resource$Globalforwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$ForwardingRule>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ForwardingRule>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ForwardingRule>,
       callback?: BodyResponseCallback<Schema$ForwardingRule>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ForwardingRule>,
       callback?: BodyResponseCallback<Schema$ForwardingRule>):
       void|AxiosPromise<Schema$ForwardingRule> {
@@ -15475,13 +15486,13 @@ export class Resource$Globalforwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -15599,14 +15610,14 @@ export class Resource$Globalforwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ForwardingRuleList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ForwardingRuleList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ForwardingRuleList>,
       callback?: BodyResponseCallback<Schema$ForwardingRuleList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ForwardingRuleList>,
       callback?: BodyResponseCallback<Schema$ForwardingRuleList>):
       void|AxiosPromise<Schema$ForwardingRuleList> {
@@ -15716,14 +15727,14 @@ export class Resource$Globalforwardingrules {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setTarget(params: any, options?: MethodOptions):
+  setTarget(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setTarget(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setTarget(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -15853,15 +15864,15 @@ export class Resource$Globaloperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OperationAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OperationAggregatedList>,
       callback?: BodyResponseCallback<Schema$OperationAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OperationAggregatedList>,
       callback?: BodyResponseCallback<Schema$OperationAggregatedList>):
@@ -15963,12 +15974,12 @@ export class Resource$Globaloperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -16072,11 +16083,11 @@ export class Resource$Globaloperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -16195,14 +16206,14 @@ export class Resource$Globaloperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OperationList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$OperationList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OperationList>,
       callback?: BodyResponseCallback<Schema$OperationList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$OperationList>,
       callback?: BodyResponseCallback<Schema$OperationList>):
       void|AxiosPromise<Schema$OperationList> {
@@ -16318,13 +16329,13 @@ export class Resource$Healthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -16430,11 +16441,11 @@ export class Resource$Healthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$HealthCheck>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$HealthCheck>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$HealthCheck>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$HealthCheck>,
       callback?: BodyResponseCallback<Schema$HealthCheck>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$HealthCheck>,
       callback?: BodyResponseCallback<Schema$HealthCheck>):
       void|AxiosPromise<Schema$HealthCheck> {
@@ -16542,13 +16553,13 @@ export class Resource$Healthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -16666,14 +16677,14 @@ export class Resource$Healthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$HealthCheckList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$HealthCheckList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$HealthCheckList>,
       callback?: BodyResponseCallback<Schema$HealthCheckList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$HealthCheckList>,
       callback?: BodyResponseCallback<Schema$HealthCheckList>):
       void|AxiosPromise<Schema$HealthCheckList> {
@@ -16787,13 +16798,13 @@ export class Resource$Healthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -16907,13 +16918,13 @@ export class Resource$Healthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -17032,13 +17043,13 @@ export class Resource$Httphealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -17145,12 +17156,12 @@ export class Resource$Httphealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$HttpHealthCheck>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$HttpHealthCheck>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$HttpHealthCheck>,
       callback?: BodyResponseCallback<Schema$HttpHealthCheck>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$HttpHealthCheck>,
       callback?: BodyResponseCallback<Schema$HttpHealthCheck>):
       void|AxiosPromise<Schema$HttpHealthCheck> {
@@ -17258,13 +17269,13 @@ export class Resource$Httphealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -17382,14 +17393,14 @@ export class Resource$Httphealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$HttpHealthCheckList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$HttpHealthCheckList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$HttpHealthCheckList>,
       callback?: BodyResponseCallback<Schema$HttpHealthCheckList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$HttpHealthCheckList>,
       callback?: BodyResponseCallback<Schema$HttpHealthCheckList>):
       void|AxiosPromise<Schema$HttpHealthCheckList> {
@@ -17504,13 +17515,13 @@ export class Resource$Httphealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -17625,13 +17636,13 @@ export class Resource$Httphealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -17750,13 +17761,13 @@ export class Resource$Httpshealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -17863,12 +17874,12 @@ export class Resource$Httpshealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$HttpsHealthCheck>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$HttpsHealthCheck>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$HttpsHealthCheck>,
       callback?: BodyResponseCallback<Schema$HttpsHealthCheck>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$HttpsHealthCheck>,
       callback?: BodyResponseCallback<Schema$HttpsHealthCheck>):
       void|AxiosPromise<Schema$HttpsHealthCheck> {
@@ -17976,13 +17987,13 @@ export class Resource$Httpshealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -18100,14 +18111,14 @@ export class Resource$Httpshealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$HttpsHealthCheckList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$HttpsHealthCheckList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$HttpsHealthCheckList>,
       callback?: BodyResponseCallback<Schema$HttpsHealthCheckList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$HttpsHealthCheckList>,
       callback?: BodyResponseCallback<Schema$HttpsHealthCheckList>):
       void|AxiosPromise<Schema$HttpsHealthCheckList> {
@@ -18222,13 +18233,13 @@ export class Resource$Httpshealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -18343,13 +18354,13 @@ export class Resource$Httpshealthchecks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -18467,13 +18478,13 @@ export class Resource$Images {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -18584,14 +18595,14 @@ export class Resource$Images {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  deprecate(params: any, options?: MethodOptions):
+  deprecate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   deprecate(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   deprecate(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -18697,10 +18708,10 @@ export class Resource$Images {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Image>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Image>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Image>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Image>,
       callback?: BodyResponseCallback<Schema$Image>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Image>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Image>,
       callback?: BodyResponseCallback<Schema$Image>):
       void|AxiosPromise<Schema$Image> {
     if (typeof options === 'function') {
@@ -18804,13 +18815,13 @@ export class Resource$Images {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getFromFamily(params: any, options?: MethodOptions):
+  getFromFamily(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Image>;
   getFromFamily(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Image>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Image>,
       callback?: BodyResponseCallback<Schema$Image>): void;
   getFromFamily(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Image>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Image>,
       callback?: BodyResponseCallback<Schema$Image>):
       void|AxiosPromise<Schema$Image> {
     if (typeof options === 'function') {
@@ -18918,13 +18929,13 @@ export class Resource$Images {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -19045,13 +19056,13 @@ export class Resource$Images {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$ImageList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$ImageList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ImageList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ImageList>,
       callback?: BodyResponseCallback<Schema$ImageList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ImageList>,
       callback?: BodyResponseCallback<Schema$ImageList>):
       void|AxiosPromise<Schema$ImageList> {
@@ -19160,14 +19171,14 @@ export class Resource$Images {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setLabels(params: any, options?: MethodOptions):
+  setLabels(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setLabels(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setLabels(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -19304,14 +19315,14 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  abandonInstances(params: any, options?: MethodOptions):
+  abandonInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   abandonInstances(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   abandonInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -19430,17 +19441,17 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstanceGroupManagerAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InstanceGroupManagerAggregatedList>,
       callback?:
           BodyResponseCallback<Schema$InstanceGroupManagerAggregatedList>):
       void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InstanceGroupManagerAggregatedList>,
       callback?:
@@ -19557,13 +19568,13 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -19687,14 +19698,14 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  deleteInstances(params: any, options?: MethodOptions):
+  deleteInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   deleteInstances(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   deleteInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -19806,12 +19817,12 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$InstanceGroupManager>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InstanceGroupManager>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InstanceGroupManager>,
       callback?: BodyResponseCallback<Schema$InstanceGroupManager>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InstanceGroupManager>,
       callback?: BodyResponseCallback<Schema$InstanceGroupManager>):
       void|AxiosPromise<Schema$InstanceGroupManager> {
@@ -19929,13 +19940,13 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -20058,15 +20069,15 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstanceGroupManagerList>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InstanceGroupManagerList>,
       callback?: BodyResponseCallback<Schema$InstanceGroupManagerList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InstanceGroupManagerList>,
       callback?: BodyResponseCallback<Schema$InstanceGroupManagerList>):
@@ -20184,16 +20195,16 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listManagedInstances(params: any, options?: MethodOptions):
+  listManagedInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstanceGroupManagersListManagedInstancesResponse>;
   listManagedInstances(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$InstanceGroupManagersListManagedInstancesResponse>,
       callback?: BodyResponseCallback<
           Schema$InstanceGroupManagersListManagedInstancesResponse>): void;
   listManagedInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$InstanceGroupManagersListManagedInstancesResponse>,
       callback?: BodyResponseCallback<
@@ -20321,14 +20332,14 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  recreateInstances(params: any, options?: MethodOptions):
+  recreateInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   recreateInstances(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   recreateInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -20455,13 +20466,13 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resize(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  resize(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   resize(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   resize(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -20577,14 +20588,14 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setInstanceTemplate(params: any, options?: MethodOptions):
+  setInstanceTemplate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setInstanceTemplate(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setInstanceTemplate(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -20703,14 +20714,14 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setTargetPools(params: any, options?: MethodOptions):
+  setTargetPools(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setTargetPools(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setTargetPools(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -20839,14 +20850,14 @@ export class Resource$Instancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  addInstances(params: any, options?: MethodOptions):
+  addInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   addInstances(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   addInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -20964,16 +20975,16 @@ export class Resource$Instancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstanceGroupAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InstanceGroupAggregatedList>,
       callback?: BodyResponseCallback<Schema$InstanceGroupAggregatedList>):
       void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InstanceGroupAggregatedList>,
       callback?: BodyResponseCallback<Schema$InstanceGroupAggregatedList>):
@@ -21086,13 +21097,13 @@ export class Resource$Instancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -21202,11 +21213,12 @@ export class Resource$Instancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$InstanceGroup>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InstanceGroup>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$InstanceGroup>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InstanceGroup>,
       callback?: BodyResponseCallback<Schema$InstanceGroup>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InstanceGroup>,
       callback?: BodyResponseCallback<Schema$InstanceGroup>):
       void|AxiosPromise<Schema$InstanceGroup> {
@@ -21318,13 +21330,13 @@ export class Resource$Instancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -21446,14 +21458,14 @@ export class Resource$Instancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstanceGroupList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InstanceGroupList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InstanceGroupList>,
       callback?: BodyResponseCallback<Schema$InstanceGroupList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InstanceGroupList>,
       callback?: BodyResponseCallback<Schema$InstanceGroupList>):
       void|AxiosPromise<Schema$InstanceGroupList> {
@@ -21584,16 +21596,16 @@ export class Resource$Instancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listInstances(params: any, options?: MethodOptions):
+  listInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstanceGroupsListInstances>;
   listInstances(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InstanceGroupsListInstances>,
       callback?: BodyResponseCallback<Schema$InstanceGroupsListInstances>):
       void;
   listInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InstanceGroupsListInstances>,
       callback?: BodyResponseCallback<Schema$InstanceGroupsListInstances>):
@@ -21715,14 +21727,14 @@ export class Resource$Instancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  removeInstances(params: any, options?: MethodOptions):
+  removeInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   removeInstances(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   removeInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -21837,14 +21849,14 @@ export class Resource$Instancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setNamedPorts(params: any, options?: MethodOptions):
+  setNamedPorts(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setNamedPorts(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setNamedPorts(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -21975,14 +21987,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  addAccessConfig(params: any, options?: MethodOptions):
+  addAccessConfig(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   addAccessConfig(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   addAccessConfig(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -22100,15 +22112,15 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstanceAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InstanceAggregatedList>,
       callback?: BodyResponseCallback<Schema$InstanceAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InstanceAggregatedList>,
       callback?: BodyResponseCallback<Schema$InstanceAggregatedList>):
@@ -22226,14 +22238,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  attachDisk(params: any, options?: MethodOptions):
+  attachDisk(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   attachDisk(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   attachDisk(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -22344,13 +22356,13 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -22468,14 +22480,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  deleteAccessConfig(params: any, options?: MethodOptions):
+  deleteAccessConfig(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   deleteAccessConfig(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   deleteAccessConfig(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -22590,14 +22602,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  detachDisk(params: any, options?: MethodOptions):
+  detachDisk(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   detachDisk(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   detachDisk(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -22707,10 +22719,11 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Instance>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Instance>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Instance>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Instance>,
       callback?: BodyResponseCallback<Schema$Instance>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Instance>,
       callback?: BodyResponseCallback<Schema$Instance>):
       void|AxiosPromise<Schema$Instance> {
@@ -22821,14 +22834,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getSerialPortOutput(params: any, options?: MethodOptions):
+  getSerialPortOutput(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SerialPortOutput>;
   getSerialPortOutput(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SerialPortOutput>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SerialPortOutput>,
       callback?: BodyResponseCallback<Schema$SerialPortOutput>): void;
   getSerialPortOutput(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SerialPortOutput>,
       callback?: BodyResponseCallback<Schema$SerialPortOutput>):
       void|AxiosPromise<Schema$SerialPortOutput> {
@@ -22941,13 +22954,13 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -23068,13 +23081,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$InstanceList>;
+  list(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$InstanceList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InstanceList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InstanceList>,
       callback?: BodyResponseCallback<Schema$InstanceList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InstanceList>,
       callback?: BodyResponseCallback<Schema$InstanceList>):
       void|AxiosPromise<Schema$InstanceList> {
@@ -23129,14 +23143,15 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listReferrers(params: any, options?: MethodOptions):
+  listReferrers(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstanceListReferrers>;
   listReferrers(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InstanceListReferrers>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$InstanceListReferrers>,
       callback?: BodyResponseCallback<Schema$InstanceListReferrers>): void;
   listReferrers(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InstanceListReferrers>,
       callback?: BodyResponseCallback<Schema$InstanceListReferrers>):
@@ -23248,13 +23263,13 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  reset(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  reset(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   reset(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   reset(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -23363,14 +23378,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setDeletionProtection(params: any, options?: MethodOptions):
+  setDeletionProtection(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setDeletionProtection(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setDeletionProtection(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -23488,14 +23503,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setDiskAutoDelete(params: any, options?: MethodOptions):
+  setDiskAutoDelete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setDiskAutoDelete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setDiskAutoDelete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -23612,14 +23627,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setLabels(params: any, options?: MethodOptions):
+  setLabels(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setLabels(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setLabels(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -23735,14 +23750,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setMachineResources(params: any, options?: MethodOptions):
+  setMachineResources(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setMachineResources(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setMachineResources(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -23858,14 +23873,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setMachineType(params: any, options?: MethodOptions):
+  setMachineType(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setMachineType(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setMachineType(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -23981,14 +23996,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setMetadata(params: any, options?: MethodOptions):
+  setMetadata(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setMetadata(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setMetadata(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -24105,14 +24120,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setMinCpuPlatform(params: any, options?: MethodOptions):
+  setMinCpuPlatform(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setMinCpuPlatform(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setMinCpuPlatform(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -24227,14 +24242,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setScheduling(params: any, options?: MethodOptions):
+  setScheduling(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setScheduling(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setScheduling(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -24350,14 +24365,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setServiceAccount(params: any, options?: MethodOptions):
+  setServiceAccount(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setServiceAccount(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setServiceAccount(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -24473,13 +24488,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setTags(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  setTags(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Operation>;
   setTags(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setTags(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -24590,13 +24606,13 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  start(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  start(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   start(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   start(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -24710,14 +24726,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  startWithEncryptionKey(params: any, options?: MethodOptions):
+  startWithEncryptionKey(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   startWithEncryptionKey(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   startWithEncryptionKey(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -24832,13 +24848,13 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  stop(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  stop(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   stop(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   stop(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -24894,14 +24910,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  updateAccessConfig(params: any, options?: MethodOptions):
+  updateAccessConfig(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   updateAccessConfig(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   updateAccessConfig(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -24956,14 +24972,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  updateNetworkInterface(params: any, options?: MethodOptions):
+  updateNetworkInterface(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   updateNetworkInterface(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   updateNetworkInterface(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -25084,13 +25100,13 @@ export class Resource$Instancetemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -25197,12 +25213,12 @@ export class Resource$Instancetemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$InstanceTemplate>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InstanceTemplate>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InstanceTemplate>,
       callback?: BodyResponseCallback<Schema$InstanceTemplate>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InstanceTemplate>,
       callback?: BodyResponseCallback<Schema$InstanceTemplate>):
       void|AxiosPromise<Schema$InstanceTemplate> {
@@ -25313,13 +25329,13 @@ export class Resource$Instancetemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -25437,14 +25453,14 @@ export class Resource$Instancetemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstanceTemplateList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InstanceTemplateList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InstanceTemplateList>,
       callback?: BodyResponseCallback<Schema$InstanceTemplateList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InstanceTemplateList>,
       callback?: BodyResponseCallback<Schema$InstanceTemplateList>):
       void|AxiosPromise<Schema$InstanceTemplateList> {
@@ -25573,17 +25589,17 @@ export class Resource$Interconnectattachments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InterconnectAttachmentAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InterconnectAttachmentAggregatedList>,
       callback?:
           BodyResponseCallback<Schema$InterconnectAttachmentAggregatedList>):
       void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InterconnectAttachmentAggregatedList>,
       callback?:
@@ -25698,13 +25714,13 @@ export class Resource$Interconnectattachments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -25814,13 +25830,13 @@ export class Resource$Interconnectattachments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$InterconnectAttachment>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InterconnectAttachment>,
       callback?: BodyResponseCallback<Schema$InterconnectAttachment>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InterconnectAttachment>,
       callback?: BodyResponseCallback<Schema$InterconnectAttachment>):
@@ -25933,13 +25949,13 @@ export class Resource$Interconnectattachments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -26062,15 +26078,15 @@ export class Resource$Interconnectattachments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InterconnectAttachmentList>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InterconnectAttachmentList>,
       callback?: BodyResponseCallback<Schema$InterconnectAttachmentList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InterconnectAttachmentList>,
       callback?: BodyResponseCallback<Schema$InterconnectAttachmentList>):
@@ -26190,12 +26206,12 @@ export class Resource$Interconnectlocations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$InterconnectLocation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InterconnectLocation>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InterconnectLocation>,
       callback?: BodyResponseCallback<Schema$InterconnectLocation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InterconnectLocation>,
       callback?: BodyResponseCallback<Schema$InterconnectLocation>):
       void|AxiosPromise<Schema$InterconnectLocation> {
@@ -26314,15 +26330,15 @@ export class Resource$Interconnectlocations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InterconnectLocationList>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InterconnectLocationList>,
       callback?: BodyResponseCallback<Schema$InterconnectLocationList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InterconnectLocationList>,
       callback?: BodyResponseCallback<Schema$InterconnectLocationList>):
@@ -26440,13 +26456,13 @@ export class Resource$Interconnects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -26552,11 +26568,11 @@ export class Resource$Interconnects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Interconnect>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Interconnect>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Interconnect>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Interconnect>,
       callback?: BodyResponseCallback<Schema$Interconnect>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Interconnect>,
       callback?: BodyResponseCallback<Schema$Interconnect>):
       void|AxiosPromise<Schema$Interconnect> {
@@ -26664,13 +26680,13 @@ export class Resource$Interconnects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -26788,14 +26804,14 @@ export class Resource$Interconnects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InterconnectList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InterconnectList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InterconnectList>,
       callback?: BodyResponseCallback<Schema$InterconnectList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InterconnectList>,
       callback?: BodyResponseCallback<Schema$InterconnectList>):
       void|AxiosPromise<Schema$InterconnectList> {
@@ -26909,13 +26925,13 @@ export class Resource$Interconnects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -26978,11 +26994,11 @@ export class Resource$Licensecodes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$LicenseCode>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LicenseCode>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$LicenseCode>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LicenseCode>,
       callback?: BodyResponseCallback<Schema$LicenseCode>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LicenseCode>,
       callback?: BodyResponseCallback<Schema$LicenseCode>):
       void|AxiosPromise<Schema$LicenseCode> {
@@ -27033,15 +27049,15 @@ export class Resource$Licensecodes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -27105,13 +27121,13 @@ export class Resource$Licenses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -27215,10 +27231,12 @@ export class Resource$Licenses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$License>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$License>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$License>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$License>,
       callback?: BodyResponseCallback<Schema$License>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$License>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$License>,
       callback?: BodyResponseCallback<Schema$License>):
       void|AxiosPromise<Schema$License> {
     if (typeof options === 'function') {
@@ -27267,13 +27285,13 @@ export class Resource$Licenses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -27329,14 +27347,14 @@ export class Resource$Licenses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LicensesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LicensesListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LicensesListResponse>,
       callback?: BodyResponseCallback<Schema$LicensesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LicensesListResponse>,
       callback?: BodyResponseCallback<Schema$LicensesListResponse>):
       void|AxiosPromise<Schema$LicensesListResponse> {
@@ -27385,15 +27403,15 @@ export class Resource$Licenses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -27524,15 +27542,15 @@ export class Resource$Machinetypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$MachineTypeAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$MachineTypeAggregatedList>,
       callback?: BodyResponseCallback<Schema$MachineTypeAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$MachineTypeAggregatedList>,
       callback?: BodyResponseCallback<Schema$MachineTypeAggregatedList>):
@@ -27642,11 +27660,11 @@ export class Resource$Machinetypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$MachineType>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$MachineType>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$MachineType>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$MachineType>,
       callback?: BodyResponseCallback<Schema$MachineType>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$MachineType>,
       callback?: BodyResponseCallback<Schema$MachineType>):
       void|AxiosPromise<Schema$MachineType> {
@@ -27768,14 +27786,14 @@ export class Resource$Machinetypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$MachineTypeList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$MachineTypeList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$MachineTypeList>,
       callback?: BodyResponseCallback<Schema$MachineTypeList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$MachineTypeList>,
       callback?: BodyResponseCallback<Schema$MachineTypeList>):
       void|AxiosPromise<Schema$MachineTypeList> {
@@ -27897,14 +27915,14 @@ export class Resource$Networks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  addPeering(params: any, options?: MethodOptions):
+  addPeering(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   addPeering(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   addPeering(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -28010,13 +28028,13 @@ export class Resource$Networks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -28121,10 +28139,12 @@ export class Resource$Networks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Network>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Network>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Network>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Network>,
       callback?: BodyResponseCallback<Schema$Network>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Network>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Network>,
       callback?: BodyResponseCallback<Schema$Network>):
       void|AxiosPromise<Schema$Network> {
     if (typeof options === 'function') {
@@ -28230,13 +28250,13 @@ export class Resource$Networks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -28352,13 +28372,13 @@ export class Resource$Networks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$NetworkList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$NetworkList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$NetworkList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$NetworkList>,
       callback?: BodyResponseCallback<Schema$NetworkList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$NetworkList>,
       callback?: BodyResponseCallback<Schema$NetworkList>):
       void|AxiosPromise<Schema$NetworkList> {
@@ -28470,13 +28490,13 @@ export class Resource$Networks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -28586,14 +28606,14 @@ export class Resource$Networks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  removePeering(params: any, options?: MethodOptions):
+  removePeering(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   removePeering(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   removePeering(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -28700,14 +28720,14 @@ export class Resource$Networks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  switchToCustomMode(params: any, options?: MethodOptions):
+  switchToCustomMode(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   switchToCustomMode(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   switchToCustomMode(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -28821,14 +28841,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  disableXpnHost(params: any, options?: MethodOptions):
+  disableXpnHost(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   disableXpnHost(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   disableXpnHost(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -28934,14 +28954,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  disableXpnResource(params: any, options?: MethodOptions):
+  disableXpnResource(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   disableXpnResource(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   disableXpnResource(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -29041,14 +29061,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  enableXpnHost(params: any, options?: MethodOptions):
+  enableXpnHost(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   enableXpnHost(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   enableXpnHost(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -29155,14 +29175,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  enableXpnResource(params: any, options?: MethodOptions):
+  enableXpnResource(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   enableXpnResource(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   enableXpnResource(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -29261,10 +29281,12 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Project>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Project>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Project>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Project>,
       callback?: BodyResponseCallback<Schema$Project>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Project>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Project>,
       callback?: BodyResponseCallback<Schema$Project>):
       void|AxiosPromise<Schema$Project> {
     if (typeof options === 'function') {
@@ -29363,13 +29385,15 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getXpnHost(params: any, options?: MethodOptions):
+  getXpnHost(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Project>;
   getXpnHost(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Project>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Project>,
       callback?: BodyResponseCallback<Schema$Project>): void;
   getXpnHost(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Project>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Project>,
       callback?: BodyResponseCallback<Schema$Project>):
       void|AxiosPromise<Schema$Project> {
     if (typeof options === 'function') {
@@ -29485,15 +29509,15 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getXpnResources(params: any, options?: MethodOptions):
+  getXpnResources(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ProjectsGetXpnResources>;
   getXpnResources(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ProjectsGetXpnResources>,
       callback?: BodyResponseCallback<Schema$ProjectsGetXpnResources>): void;
   getXpnResources(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ProjectsGetXpnResources>,
       callback?: BodyResponseCallback<Schema$ProjectsGetXpnResources>):
@@ -29616,14 +29640,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listXpnHosts(params: any, options?: MethodOptions):
+  listXpnHosts(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$XpnHostList>;
   listXpnHosts(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$XpnHostList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$XpnHostList>,
       callback?: BodyResponseCallback<Schema$XpnHostList>): void;
   listXpnHosts(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$XpnHostList>,
       callback?: BodyResponseCallback<Schema$XpnHostList>):
       void|AxiosPromise<Schema$XpnHostList> {
@@ -29728,14 +29752,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  moveDisk(params: any, options?: MethodOptions):
+  moveDisk(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   moveDisk(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   moveDisk(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -29841,14 +29865,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  moveInstance(params: any, options?: MethodOptions):
+  moveInstance(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   moveInstance(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   moveInstance(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -29952,14 +29976,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setCommonInstanceMetadata(params: any, options?: MethodOptions):
+  setCommonInstanceMetadata(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setCommonInstanceMetadata(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setCommonInstanceMetadata(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -30067,14 +30091,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setUsageExportBucket(params: any, options?: MethodOptions):
+  setUsageExportBucket(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setUsageExportBucket(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setUsageExportBucket(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -30195,13 +30219,13 @@ export class Resource$Regionautoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -30310,11 +30334,11 @@ export class Resource$Regionautoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Autoscaler>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Autoscaler>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Autoscaler>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Autoscaler>,
       callback?: BodyResponseCallback<Schema$Autoscaler>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Autoscaler>,
       callback?: BodyResponseCallback<Schema$Autoscaler>):
       void|AxiosPromise<Schema$Autoscaler> {
@@ -30426,13 +30450,13 @@ export class Resource$Regionautoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -30554,14 +30578,14 @@ export class Resource$Regionautoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RegionAutoscalerList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RegionAutoscalerList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RegionAutoscalerList>,
       callback?: BodyResponseCallback<Schema$RegionAutoscalerList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RegionAutoscalerList>,
       callback?: BodyResponseCallback<Schema$RegionAutoscalerList>):
       void|AxiosPromise<Schema$RegionAutoscalerList> {
@@ -30676,13 +30700,13 @@ export class Resource$Regionautoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -30796,13 +30820,13 @@ export class Resource$Regionautoscalers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -30924,13 +30948,13 @@ export class Resource$Regionbackendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -31040,12 +31064,12 @@ export class Resource$Regionbackendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$BackendService>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BackendService>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BackendService>,
       callback?: BodyResponseCallback<Schema$BackendService>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BackendService>,
       callback?: BodyResponseCallback<Schema$BackendService>):
       void|AxiosPromise<Schema$BackendService> {
@@ -31158,15 +31182,15 @@ export class Resource$Regionbackendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getHealth(params: any, options?: MethodOptions):
+  getHealth(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BackendServiceGroupHealth>;
   getHealth(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$BackendServiceGroupHealth>,
       callback?: BodyResponseCallback<Schema$BackendServiceGroupHealth>): void;
   getHealth(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$BackendServiceGroupHealth>,
       callback?: BodyResponseCallback<Schema$BackendServiceGroupHealth>):
@@ -31281,13 +31305,13 @@ export class Resource$Regionbackendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -31410,14 +31434,14 @@ export class Resource$Regionbackendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BackendServiceList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BackendServiceList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BackendServiceList>,
       callback?: BodyResponseCallback<Schema$BackendServiceList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BackendServiceList>,
       callback?: BodyResponseCallback<Schema$BackendServiceList>):
       void|AxiosPromise<Schema$BackendServiceList> {
@@ -31539,13 +31563,13 @@ export class Resource$Regionbackendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -31666,13 +31690,13 @@ export class Resource$Regionbackendservices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -31802,15 +31826,15 @@ export class Resource$Regioncommitments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CommitmentAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$CommitmentAggregatedList>,
       callback?: BodyResponseCallback<Schema$CommitmentAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$CommitmentAggregatedList>,
       callback?: BodyResponseCallback<Schema$CommitmentAggregatedList>):
@@ -31920,11 +31944,11 @@ export class Resource$Regioncommitments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Commitment>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Commitment>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Commitment>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Commitment>,
       callback?: BodyResponseCallback<Schema$Commitment>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Commitment>,
       callback?: BodyResponseCallback<Schema$Commitment>):
       void|AxiosPromise<Schema$Commitment> {
@@ -32036,13 +32060,13 @@ export class Resource$Regioncommitments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -32164,14 +32188,14 @@ export class Resource$Regioncommitments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CommitmentList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CommitmentList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CommitmentList>,
       callback?: BodyResponseCallback<Schema$CommitmentList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CommitmentList>,
       callback?: BodyResponseCallback<Schema$CommitmentList>):
       void|AxiosPromise<Schema$CommitmentList> {
@@ -32307,14 +32331,14 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  abandonInstances(params: any, options?: MethodOptions):
+  abandonInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   abandonInstances(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   abandonInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -32424,13 +32448,13 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -32554,14 +32578,14 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  deleteInstances(params: any, options?: MethodOptions):
+  deleteInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   deleteInstances(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   deleteInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -32670,12 +32694,12 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$InstanceGroupManager>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InstanceGroupManager>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InstanceGroupManager>,
       callback?: BodyResponseCallback<Schema$InstanceGroupManager>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InstanceGroupManager>,
       callback?: BodyResponseCallback<Schema$InstanceGroupManager>):
       void|AxiosPromise<Schema$InstanceGroupManager> {
@@ -32791,13 +32815,13 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -32920,16 +32944,16 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RegionInstanceGroupManagerList>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$RegionInstanceGroupManagerList>,
       callback?: BodyResponseCallback<Schema$RegionInstanceGroupManagerList>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$RegionInstanceGroupManagerList>,
       callback?: BodyResponseCallback<Schema$RegionInstanceGroupManagerList>):
@@ -33046,16 +33070,16 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listManagedInstances(params: any, options?: MethodOptions):
+  listManagedInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RegionInstanceGroupManagersListInstancesResponse>;
   listManagedInstances(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$RegionInstanceGroupManagersListInstancesResponse>,
       callback?: BodyResponseCallback<
           Schema$RegionInstanceGroupManagersListInstancesResponse>): void;
   listManagedInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$RegionInstanceGroupManagersListInstancesResponse>,
       callback?: BodyResponseCallback<
@@ -33182,14 +33206,14 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  recreateInstances(params: any, options?: MethodOptions):
+  recreateInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   recreateInstances(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   recreateInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -33311,13 +33335,13 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resize(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  resize(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   resize(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   resize(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -33432,14 +33456,14 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setInstanceTemplate(params: any, options?: MethodOptions):
+  setInstanceTemplate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setInstanceTemplate(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setInstanceTemplate(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -33554,14 +33578,14 @@ export class Resource$Regioninstancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setTargetPools(params: any, options?: MethodOptions):
+  setTargetPools(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setTargetPools(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setTargetPools(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -33682,11 +33706,12 @@ export class Resource$Regioninstancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$InstanceGroup>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InstanceGroup>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$InstanceGroup>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InstanceGroup>,
       callback?: BodyResponseCallback<Schema$InstanceGroup>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InstanceGroup>,
       callback?: BodyResponseCallback<Schema$InstanceGroup>):
       void|AxiosPromise<Schema$InstanceGroup> {
@@ -33809,15 +33834,15 @@ export class Resource$Regioninstancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RegionInstanceGroupList>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$RegionInstanceGroupList>,
       callback?: BodyResponseCallback<Schema$RegionInstanceGroupList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$RegionInstanceGroupList>,
       callback?: BodyResponseCallback<Schema$RegionInstanceGroupList>):
@@ -33952,16 +33977,16 @@ export class Resource$Regioninstancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listInstances(params: any, options?: MethodOptions):
+  listInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RegionInstanceGroupsListInstances>;
   listInstances(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$RegionInstanceGroupsListInstances>,
       callback?:
           BodyResponseCallback<Schema$RegionInstanceGroupsListInstances>): void;
   listInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$RegionInstanceGroupsListInstances>,
       callback?:
@@ -34079,14 +34104,14 @@ export class Resource$Regioninstancegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setNamedPorts(params: any, options?: MethodOptions):
+  setNamedPorts(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setNamedPorts(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setNamedPorts(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -34204,12 +34229,12 @@ export class Resource$Regionoperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -34316,11 +34341,11 @@ export class Resource$Regionoperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -34443,14 +34468,14 @@ export class Resource$Regionoperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OperationList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$OperationList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OperationList>,
       callback?: BodyResponseCallback<Schema$OperationList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$OperationList>,
       callback?: BodyResponseCallback<Schema$OperationList>):
       void|AxiosPromise<Schema$OperationList> {
@@ -34567,10 +34592,10 @@ export class Resource$Regions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Region>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Region>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Region>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Region>,
       callback?: BodyResponseCallback<Schema$Region>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Region>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Region>,
       callback?: BodyResponseCallback<Schema$Region>):
       void|AxiosPromise<Schema$Region> {
     if (typeof options === 'function') {
@@ -34686,13 +34711,13 @@ export class Resource$Regions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$RegionList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$RegionList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RegionList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RegionList>,
       callback?: BodyResponseCallback<Schema$RegionList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RegionList>,
       callback?: BodyResponseCallback<Schema$RegionList>):
       void|AxiosPromise<Schema$RegionList> {
@@ -34820,14 +34845,14 @@ export class Resource$Routers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RouterAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RouterAggregatedList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RouterAggregatedList>,
       callback?: BodyResponseCallback<Schema$RouterAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RouterAggregatedList>,
       callback?: BodyResponseCallback<Schema$RouterAggregatedList>):
       void|AxiosPromise<Schema$RouterAggregatedList> {
@@ -34935,13 +34960,13 @@ export class Resource$Routers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -35051,10 +35076,10 @@ export class Resource$Routers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Router>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Router>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Router>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Router>,
       callback?: BodyResponseCallback<Schema$Router>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Router>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Router>,
       callback?: BodyResponseCallback<Schema$Router>):
       void|AxiosPromise<Schema$Router> {
     if (typeof options === 'function') {
@@ -35162,14 +35187,14 @@ export class Resource$Routers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getRouterStatus(params: any, options?: MethodOptions):
+  getRouterStatus(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RouterStatusResponse>;
   getRouterStatus(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RouterStatusResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RouterStatusResponse>,
       callback?: BodyResponseCallback<Schema$RouterStatusResponse>): void;
   getRouterStatus(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RouterStatusResponse>,
       callback?: BodyResponseCallback<Schema$RouterStatusResponse>):
       void|AxiosPromise<Schema$RouterStatusResponse> {
@@ -35281,13 +35306,13 @@ export class Resource$Routers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -35409,13 +35434,13 @@ export class Resource$Routers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$RouterList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$RouterList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RouterList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RouterList>,
       callback?: BodyResponseCallback<Schema$RouterList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RouterList>,
       callback?: BodyResponseCallback<Schema$RouterList>):
       void|AxiosPromise<Schema$RouterList> {
@@ -35533,13 +35558,13 @@ export class Resource$Routers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -35654,15 +35679,15 @@ export class Resource$Routers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  preview(params: any, options?: MethodOptions):
+  preview(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RoutersPreviewResponse>;
   preview(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$RoutersPreviewResponse>,
       callback?: BodyResponseCallback<Schema$RoutersPreviewResponse>): void;
   preview(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$RoutersPreviewResponse>,
       callback?: BodyResponseCallback<Schema$RoutersPreviewResponse>):
@@ -35781,13 +35806,13 @@ export class Resource$Routers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -35905,13 +35930,13 @@ export class Resource$Routes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -36016,10 +36041,10 @@ export class Resource$Routes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Route>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Route>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Route>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Route>,
       callback?: BodyResponseCallback<Schema$Route>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Route>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Route>,
       callback?: BodyResponseCallback<Schema$Route>):
       void|AxiosPromise<Schema$Route> {
     if (typeof options === 'function') {
@@ -36125,13 +36150,13 @@ export class Resource$Routes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -36248,13 +36273,13 @@ export class Resource$Routes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$RouteList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$RouteList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RouteList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RouteList>,
       callback?: BodyResponseCallback<Schema$RouteList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RouteList>,
       callback?: BodyResponseCallback<Schema$RouteList>):
       void|AxiosPromise<Schema$RouteList> {
@@ -36374,13 +36399,13 @@ export class Resource$Snapshots {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -36485,10 +36510,11 @@ export class Resource$Snapshots {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Snapshot>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Snapshot>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Snapshot>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Snapshot>,
       callback?: BodyResponseCallback<Schema$Snapshot>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Snapshot>,
       callback?: BodyResponseCallback<Schema$Snapshot>):
       void|AxiosPromise<Schema$Snapshot> {
@@ -36606,13 +36632,14 @@ export class Resource$Snapshots {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$SnapshotList>;
+  list(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$SnapshotList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SnapshotList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SnapshotList>,
       callback?: BodyResponseCallback<Schema$SnapshotList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SnapshotList>,
       callback?: BodyResponseCallback<Schema$SnapshotList>):
       void|AxiosPromise<Schema$SnapshotList> {
@@ -36721,14 +36748,14 @@ export class Resource$Snapshots {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setLabels(params: any, options?: MethodOptions):
+  setLabels(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setLabels(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setLabels(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -36847,13 +36874,13 @@ export class Resource$Sslcertificates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -36960,12 +36987,12 @@ export class Resource$Sslcertificates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$SslCertificate>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SslCertificate>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SslCertificate>,
       callback?: BodyResponseCallback<Schema$SslCertificate>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SslCertificate>,
       callback?: BodyResponseCallback<Schema$SslCertificate>):
       void|AxiosPromise<Schema$SslCertificate> {
@@ -37073,13 +37100,13 @@ export class Resource$Sslcertificates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -37197,14 +37224,14 @@ export class Resource$Sslcertificates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SslCertificateList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SslCertificateList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SslCertificateList>,
       callback?: BodyResponseCallback<Schema$SslCertificateList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SslCertificateList>,
       callback?: BodyResponseCallback<Schema$SslCertificateList>):
       void|AxiosPromise<Schema$SslCertificateList> {
@@ -37268,13 +37295,13 @@ export class Resource$Sslpolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -37324,11 +37351,11 @@ export class Resource$Sslpolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$SslPolicy>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SslPolicy>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$SslPolicy>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SslPolicy>,
       callback?: BodyResponseCallback<Schema$SslPolicy>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SslPolicy>,
       callback?: BodyResponseCallback<Schema$SslPolicy>):
       void|AxiosPromise<Schema$SslPolicy> {
@@ -37380,13 +37407,13 @@ export class Resource$Sslpolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -37438,14 +37465,14 @@ export class Resource$Sslpolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SslPoliciesList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SslPoliciesList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SslPoliciesList>,
       callback?: BodyResponseCallback<Schema$SslPoliciesList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SslPoliciesList>,
       callback?: BodyResponseCallback<Schema$SslPoliciesList>):
       void|AxiosPromise<Schema$SslPoliciesList> {
@@ -37497,16 +37524,16 @@ export class Resource$Sslpolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listAvailableFeatures(params: any, options?: MethodOptions):
+  listAvailableFeatures(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SslPoliciesListAvailableFeaturesResponse>;
   listAvailableFeatures(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SslPoliciesListAvailableFeaturesResponse>,
       callback?: BodyResponseCallback<
           Schema$SslPoliciesListAvailableFeaturesResponse>): void;
   listAvailableFeatures(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SslPoliciesListAvailableFeaturesResponse>,
       callback?: BodyResponseCallback<
@@ -37563,13 +37590,13 @@ export class Resource$Sslpolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -37699,15 +37726,15 @@ export class Resource$Subnetworks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SubnetworkAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SubnetworkAggregatedList>,
       callback?: BodyResponseCallback<Schema$SubnetworkAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SubnetworkAggregatedList>,
       callback?: BodyResponseCallback<Schema$SubnetworkAggregatedList>):
@@ -37817,13 +37844,13 @@ export class Resource$Subnetworks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -37938,14 +37965,14 @@ export class Resource$Subnetworks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  expandIpCidrRange(params: any, options?: MethodOptions):
+  expandIpCidrRange(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   expandIpCidrRange(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   expandIpCidrRange(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -38055,11 +38082,11 @@ export class Resource$Subnetworks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Subnetwork>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Subnetwork>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Subnetwork>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Subnetwork>,
       callback?: BodyResponseCallback<Schema$Subnetwork>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Subnetwork>,
       callback?: BodyResponseCallback<Schema$Subnetwork>):
       void|AxiosPromise<Schema$Subnetwork> {
@@ -38171,13 +38198,13 @@ export class Resource$Subnetworks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -38298,14 +38325,14 @@ export class Resource$Subnetworks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SubnetworkList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SubnetworkList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SubnetworkList>,
       callback?: BodyResponseCallback<Schema$SubnetworkList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SubnetworkList>,
       callback?: BodyResponseCallback<Schema$SubnetworkList>):
       void|AxiosPromise<Schema$SubnetworkList> {
@@ -38361,13 +38388,13 @@ export class Resource$Subnetworks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -38481,14 +38508,14 @@ export class Resource$Subnetworks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setPrivateIpGoogleAccess(params: any, options?: MethodOptions):
+  setPrivateIpGoogleAccess(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setPrivateIpGoogleAccess(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setPrivateIpGoogleAccess(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -38607,13 +38634,13 @@ export class Resource$Targethttpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -38720,12 +38747,12 @@ export class Resource$Targethttpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$TargetHttpProxy>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetHttpProxy>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetHttpProxy>,
       callback?: BodyResponseCallback<Schema$TargetHttpProxy>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetHttpProxy>,
       callback?: BodyResponseCallback<Schema$TargetHttpProxy>):
       void|AxiosPromise<Schema$TargetHttpProxy> {
@@ -38833,13 +38860,13 @@ export class Resource$Targethttpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -38957,14 +38984,14 @@ export class Resource$Targethttpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetHttpProxyList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetHttpProxyList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetHttpProxyList>,
       callback?: BodyResponseCallback<Schema$TargetHttpProxyList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetHttpProxyList>,
       callback?: BodyResponseCallback<Schema$TargetHttpProxyList>):
       void|AxiosPromise<Schema$TargetHttpProxyList> {
@@ -39075,14 +39102,14 @@ export class Resource$Targethttpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setUrlMap(params: any, options?: MethodOptions):
+  setUrlMap(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setUrlMap(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setUrlMap(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -39201,13 +39228,13 @@ export class Resource$Targethttpsproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -39314,12 +39341,12 @@ export class Resource$Targethttpsproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$TargetHttpsProxy>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetHttpsProxy>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetHttpsProxy>,
       callback?: BodyResponseCallback<Schema$TargetHttpsProxy>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetHttpsProxy>,
       callback?: BodyResponseCallback<Schema$TargetHttpsProxy>):
       void|AxiosPromise<Schema$TargetHttpsProxy> {
@@ -39427,13 +39454,13 @@ export class Resource$Targethttpsproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -39551,14 +39578,14 @@ export class Resource$Targethttpsproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetHttpsProxyList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetHttpsProxyList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetHttpsProxyList>,
       callback?: BodyResponseCallback<Schema$TargetHttpsProxyList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetHttpsProxyList>,
       callback?: BodyResponseCallback<Schema$TargetHttpsProxyList>):
       void|AxiosPromise<Schema$TargetHttpsProxyList> {
@@ -39667,14 +39694,14 @@ export class Resource$Targethttpsproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setSslCertificates(params: any, options?: MethodOptions):
+  setSslCertificates(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setSslCertificates(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setSslCertificates(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -39729,14 +39756,14 @@ export class Resource$Targethttpsproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setSslPolicy(params: any, options?: MethodOptions):
+  setSslPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setSslPolicy(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setSslPolicy(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -39848,14 +39875,14 @@ export class Resource$Targethttpsproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setUrlMap(params: any, options?: MethodOptions):
+  setUrlMap(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setUrlMap(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setUrlMap(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -39985,16 +40012,16 @@ export class Resource$Targetinstances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetInstanceAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TargetInstanceAggregatedList>,
       callback?: BodyResponseCallback<Schema$TargetInstanceAggregatedList>):
       void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TargetInstanceAggregatedList>,
       callback?: BodyResponseCallback<Schema$TargetInstanceAggregatedList>):
@@ -40106,13 +40133,13 @@ export class Resource$Targetinstances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -40223,12 +40250,12 @@ export class Resource$Targetinstances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$TargetInstance>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetInstance>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetInstance>,
       callback?: BodyResponseCallback<Schema$TargetInstance>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetInstance>,
       callback?: BodyResponseCallback<Schema$TargetInstance>):
       void|AxiosPromise<Schema$TargetInstance> {
@@ -40340,13 +40367,13 @@ export class Resource$Targetinstances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -40468,14 +40495,14 @@ export class Resource$Targetinstances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetInstanceList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetInstanceList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetInstanceList>,
       callback?: BodyResponseCallback<Schema$TargetInstanceList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetInstanceList>,
       callback?: BodyResponseCallback<Schema$TargetInstanceList>):
       void|AxiosPromise<Schema$TargetInstanceList> {
@@ -40601,14 +40628,14 @@ export class Resource$Targetpools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  addHealthCheck(params: any, options?: MethodOptions):
+  addHealthCheck(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   addHealthCheck(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   addHealthCheck(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -40723,14 +40750,14 @@ export class Resource$Targetpools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  addInstance(params: any, options?: MethodOptions):
+  addInstance(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   addInstance(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   addInstance(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -40848,15 +40875,15 @@ export class Resource$Targetpools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetPoolAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TargetPoolAggregatedList>,
       callback?: BodyResponseCallback<Schema$TargetPoolAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TargetPoolAggregatedList>,
       callback?: BodyResponseCallback<Schema$TargetPoolAggregatedList>):
@@ -40966,13 +40993,13 @@ export class Resource$Targetpools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -41082,11 +41109,11 @@ export class Resource$Targetpools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$TargetPool>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetPool>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$TargetPool>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetPool>,
       callback?: BodyResponseCallback<Schema$TargetPool>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetPool>,
       callback?: BodyResponseCallback<Schema$TargetPool>):
       void|AxiosPromise<Schema$TargetPool> {
@@ -41201,15 +41228,15 @@ export class Resource$Targetpools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getHealth(params: any, options?: MethodOptions):
+  getHealth(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetPoolInstanceHealth>;
   getHealth(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TargetPoolInstanceHealth>,
       callback?: BodyResponseCallback<Schema$TargetPoolInstanceHealth>): void;
   getHealth(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TargetPoolInstanceHealth>,
       callback?: BodyResponseCallback<Schema$TargetPoolInstanceHealth>):
@@ -41322,13 +41349,13 @@ export class Resource$Targetpools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -41450,14 +41477,14 @@ export class Resource$Targetpools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetPoolList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetPoolList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetPoolList>,
       callback?: BodyResponseCallback<Schema$TargetPoolList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetPoolList>,
       callback?: BodyResponseCallback<Schema$TargetPoolList>):
       void|AxiosPromise<Schema$TargetPoolList> {
@@ -41571,14 +41598,14 @@ export class Resource$Targetpools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  removeHealthCheck(params: any, options?: MethodOptions):
+  removeHealthCheck(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   removeHealthCheck(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   removeHealthCheck(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -41693,14 +41720,14 @@ export class Resource$Targetpools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  removeInstance(params: any, options?: MethodOptions):
+  removeInstance(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   removeInstance(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   removeInstance(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -41816,14 +41843,14 @@ export class Resource$Targetpools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setBackup(params: any, options?: MethodOptions):
+  setBackup(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setBackup(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setBackup(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -41942,13 +41969,13 @@ export class Resource$Targetsslproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -42055,12 +42082,12 @@ export class Resource$Targetsslproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$TargetSslProxy>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetSslProxy>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetSslProxy>,
       callback?: BodyResponseCallback<Schema$TargetSslProxy>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetSslProxy>,
       callback?: BodyResponseCallback<Schema$TargetSslProxy>):
       void|AxiosPromise<Schema$TargetSslProxy> {
@@ -42168,13 +42195,13 @@ export class Resource$Targetsslproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -42292,14 +42319,14 @@ export class Resource$Targetsslproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetSslProxyList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetSslProxyList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetSslProxyList>,
       callback?: BodyResponseCallback<Schema$TargetSslProxyList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetSslProxyList>,
       callback?: BodyResponseCallback<Schema$TargetSslProxyList>):
       void|AxiosPromise<Schema$TargetSslProxyList> {
@@ -42408,14 +42435,14 @@ export class Resource$Targetsslproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setBackendService(params: any, options?: MethodOptions):
+  setBackendService(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setBackendService(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setBackendService(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -42525,14 +42552,14 @@ export class Resource$Targetsslproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setProxyHeader(params: any, options?: MethodOptions):
+  setProxyHeader(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setProxyHeader(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setProxyHeader(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -42642,14 +42669,14 @@ export class Resource$Targetsslproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setSslCertificates(params: any, options?: MethodOptions):
+  setSslCertificates(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setSslCertificates(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setSslCertificates(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -42704,14 +42731,14 @@ export class Resource$Targetsslproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setSslPolicy(params: any, options?: MethodOptions):
+  setSslPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setSslPolicy(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setSslPolicy(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -42830,13 +42857,13 @@ export class Resource$Targettcpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -42943,12 +42970,12 @@ export class Resource$Targettcpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$TargetTcpProxy>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetTcpProxy>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetTcpProxy>,
       callback?: BodyResponseCallback<Schema$TargetTcpProxy>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetTcpProxy>,
       callback?: BodyResponseCallback<Schema$TargetTcpProxy>):
       void|AxiosPromise<Schema$TargetTcpProxy> {
@@ -43056,13 +43083,13 @@ export class Resource$Targettcpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -43180,14 +43207,14 @@ export class Resource$Targettcpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetTcpProxyList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetTcpProxyList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetTcpProxyList>,
       callback?: BodyResponseCallback<Schema$TargetTcpProxyList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetTcpProxyList>,
       callback?: BodyResponseCallback<Schema$TargetTcpProxyList>):
       void|AxiosPromise<Schema$TargetTcpProxyList> {
@@ -43296,14 +43323,14 @@ export class Resource$Targettcpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setBackendService(params: any, options?: MethodOptions):
+  setBackendService(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setBackendService(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setBackendService(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -43413,14 +43440,14 @@ export class Resource$Targettcpproxies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setProxyHeader(params: any, options?: MethodOptions):
+  setProxyHeader(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setProxyHeader(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setProxyHeader(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -43550,16 +43577,16 @@ export class Resource$Targetvpngateways {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetVpnGatewayAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TargetVpnGatewayAggregatedList>,
       callback?: BodyResponseCallback<Schema$TargetVpnGatewayAggregatedList>):
       void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TargetVpnGatewayAggregatedList>,
       callback?: BodyResponseCallback<Schema$TargetVpnGatewayAggregatedList>):
@@ -43672,13 +43699,13 @@ export class Resource$Targetvpngateways {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -43789,12 +43816,12 @@ export class Resource$Targetvpngateways {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$TargetVpnGateway>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetVpnGateway>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetVpnGateway>,
       callback?: BodyResponseCallback<Schema$TargetVpnGateway>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetVpnGateway>,
       callback?: BodyResponseCallback<Schema$TargetVpnGateway>):
       void|AxiosPromise<Schema$TargetVpnGateway> {
@@ -43906,13 +43933,13 @@ export class Resource$Targetvpngateways {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -44035,14 +44062,14 @@ export class Resource$Targetvpngateways {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetVpnGatewayList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetVpnGatewayList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetVpnGatewayList>,
       callback?: BodyResponseCallback<Schema$TargetVpnGatewayList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetVpnGatewayList>,
       callback?: BodyResponseCallback<Schema$TargetVpnGatewayList>):
       void|AxiosPromise<Schema$TargetVpnGatewayList> {
@@ -44160,13 +44187,13 @@ export class Resource$Urlmaps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -44271,10 +44298,10 @@ export class Resource$Urlmaps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$UrlMap>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$UrlMap>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$UrlMap>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$UrlMap>,
       callback?: BodyResponseCallback<Schema$UrlMap>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$UrlMap>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$UrlMap>,
       callback?: BodyResponseCallback<Schema$UrlMap>):
       void|AxiosPromise<Schema$UrlMap> {
     if (typeof options === 'function') {
@@ -44380,13 +44407,13 @@ export class Resource$Urlmaps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -44496,14 +44523,14 @@ export class Resource$Urlmaps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  invalidateCache(params: any, options?: MethodOptions):
+  invalidateCache(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   invalidateCache(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   invalidateCache(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -44622,13 +44649,13 @@ export class Resource$Urlmaps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$UrlMapList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$UrlMapList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UrlMapList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UrlMapList>,
       callback?: BodyResponseCallback<Schema$UrlMapList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UrlMapList>,
       callback?: BodyResponseCallback<Schema$UrlMapList>):
       void|AxiosPromise<Schema$UrlMapList> {
@@ -44741,13 +44768,13 @@ export class Resource$Urlmaps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -44860,13 +44887,13 @@ export class Resource$Urlmaps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -44977,15 +45004,15 @@ export class Resource$Urlmaps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  validate(params: any, options?: MethodOptions):
+  validate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$UrlMapsValidateResponse>;
   validate(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$UrlMapsValidateResponse>,
       callback?: BodyResponseCallback<Schema$UrlMapsValidateResponse>): void;
   validate(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$UrlMapsValidateResponse>,
       callback?: BodyResponseCallback<Schema$UrlMapsValidateResponse>):
@@ -45116,15 +45143,15 @@ export class Resource$Vpntunnels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregatedList(params: any, options?: MethodOptions):
+  aggregatedList(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$VpnTunnelAggregatedList>;
   aggregatedList(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$VpnTunnelAggregatedList>,
       callback?: BodyResponseCallback<Schema$VpnTunnelAggregatedList>): void;
   aggregatedList(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$VpnTunnelAggregatedList>,
       callback?: BodyResponseCallback<Schema$VpnTunnelAggregatedList>):
@@ -45234,13 +45261,13 @@ export class Resource$Vpntunnels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -45350,11 +45377,11 @@ export class Resource$Vpntunnels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$VpnTunnel>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$VpnTunnel>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$VpnTunnel>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$VpnTunnel>,
       callback?: BodyResponseCallback<Schema$VpnTunnel>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$VpnTunnel>,
       callback?: BodyResponseCallback<Schema$VpnTunnel>):
       void|AxiosPromise<Schema$VpnTunnel> {
@@ -45466,13 +45493,13 @@ export class Resource$Vpntunnels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -45594,14 +45621,14 @@ export class Resource$Vpntunnels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$VpnTunnelList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$VpnTunnelList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$VpnTunnelList>,
       callback?: BodyResponseCallback<Schema$VpnTunnelList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$VpnTunnelList>,
       callback?: BodyResponseCallback<Schema$VpnTunnelList>):
       void|AxiosPromise<Schema$VpnTunnelList> {
@@ -45718,12 +45745,12 @@ export class Resource$Zoneoperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -45830,11 +45857,11 @@ export class Resource$Zoneoperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -45957,14 +45984,14 @@ export class Resource$Zoneoperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OperationList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$OperationList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OperationList>,
       callback?: BodyResponseCallback<Schema$OperationList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$OperationList>,
       callback?: BodyResponseCallback<Schema$OperationList>):
       void|AxiosPromise<Schema$OperationList> {
@@ -46081,10 +46108,10 @@ export class Resource$Zones {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Zone>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Zone>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Zone>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Zone>,
       callback?: BodyResponseCallback<Schema$Zone>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Zone>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Zone>,
       callback?: BodyResponseCallback<Schema$Zone>):
       void|AxiosPromise<Schema$Zone> {
     if (typeof options === 'function') {
@@ -46200,12 +46227,13 @@ export class Resource$Zones {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$ZoneList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$ZoneList>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$ZoneList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ZoneList>,
       callback?: BodyResponseCallback<Schema$ZoneList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ZoneList>,
       callback?: BodyResponseCallback<Schema$ZoneList>):
       void|AxiosPromise<Schema$ZoneList> {
diff --git a/src/apis/container/v1.ts b/src/apis/container/v1.ts
index 00ec7620e1..934ee37778 100644
--- a/src/apis/container/v1.ts
+++ b/src/apis/container/v1.ts
@@ -1773,14 +1773,14 @@ export class Resource$Projects$Locations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getServerConfig(params: any, options?: MethodOptions):
+  getServerConfig(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ServerConfig>;
   getServerConfig(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ServerConfig>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ServerConfig>,
       callback?: BodyResponseCallback<Schema$ServerConfig>): void;
   getServerConfig(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ServerConfig>,
       callback?: BodyResponseCallback<Schema$ServerConfig>):
       void|AxiosPromise<Schema$ServerConfig> {
@@ -1841,14 +1841,14 @@ export class Resource$Projects$Locations$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  completeIpRotation(params: any, options?: MethodOptions):
+  completeIpRotation(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   completeIpRotation(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   completeIpRotation(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1903,13 +1903,13 @@ export class Resource$Projects$Locations$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1963,13 +1963,13 @@ export class Resource$Projects$Locations$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2018,10 +2018,12 @@ export class Resource$Projects$Locations$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Cluster>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Cluster>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Cluster>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Cluster>,
       callback?: BodyResponseCallback<Schema$Cluster>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Cluster>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Cluster>,
       callback?: BodyResponseCallback<Schema$Cluster>):
       void|AxiosPromise<Schema$Cluster> {
     if (typeof options === 'function') {
@@ -2069,14 +2071,14 @@ export class Resource$Projects$Locations$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListClustersResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListClustersResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListClustersResponse>,
       callback?: BodyResponseCallback<Schema$ListClustersResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListClustersResponse>,
       callback?: BodyResponseCallback<Schema$ListClustersResponse>):
       void|AxiosPromise<Schema$ListClustersResponse> {
@@ -2124,14 +2126,14 @@ export class Resource$Projects$Locations$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setAddons(params: any, options?: MethodOptions):
+  setAddons(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setAddons(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setAddons(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2179,14 +2181,14 @@ export class Resource$Projects$Locations$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setLegacyAbac(params: any, options?: MethodOptions):
+  setLegacyAbac(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setLegacyAbac(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setLegacyAbac(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2234,14 +2236,14 @@ export class Resource$Projects$Locations$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setLocations(params: any, options?: MethodOptions):
+  setLocations(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setLocations(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setLocations(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2289,14 +2291,14 @@ export class Resource$Projects$Locations$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setLogging(params: any, options?: MethodOptions):
+  setLogging(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setLogging(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setLogging(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2344,14 +2346,14 @@ export class Resource$Projects$Locations$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setMaintenancePolicy(params: any, options?: MethodOptions):
+  setMaintenancePolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setMaintenancePolicy(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setMaintenancePolicy(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2401,14 +2403,14 @@ export class Resource$Projects$Locations$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setMasterAuth(params: any, options?: MethodOptions):
+  setMasterAuth(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setMasterAuth(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setMasterAuth(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2456,14 +2458,14 @@ export class Resource$Projects$Locations$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setMonitoring(params: any, options?: MethodOptions):
+  setMonitoring(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setMonitoring(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setMonitoring(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2511,14 +2513,14 @@ export class Resource$Projects$Locations$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setNetworkPolicy(params: any, options?: MethodOptions):
+  setNetworkPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setNetworkPolicy(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setNetworkPolicy(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2566,14 +2568,14 @@ export class Resource$Projects$Locations$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setResourceLabels(params: any, options?: MethodOptions):
+  setResourceLabels(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setResourceLabels(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setResourceLabels(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2621,14 +2623,14 @@ export class Resource$Projects$Locations$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  startIpRotation(params: any, options?: MethodOptions):
+  startIpRotation(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   startIpRotation(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   startIpRotation(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2676,13 +2678,13 @@ export class Resource$Projects$Locations$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2729,14 +2731,14 @@ export class Resource$Projects$Locations$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  updateMaster(params: any, options?: MethodOptions):
+  updateMaster(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   updateMaster(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   updateMaster(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2795,13 +2797,13 @@ export class Resource$Projects$Locations$Clusters$Nodepools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2852,13 +2854,13 @@ export class Resource$Projects$Locations$Clusters$Nodepools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2908,10 +2910,11 @@ export class Resource$Projects$Locations$Clusters$Nodepools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$NodePool>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$NodePool>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$NodePool>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$NodePool>,
       callback?: BodyResponseCallback<Schema$NodePool>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$NodePool>,
       callback?: BodyResponseCallback<Schema$NodePool>):
       void|AxiosPromise<Schema$NodePool> {
@@ -2960,14 +2963,15 @@ export class Resource$Projects$Locations$Clusters$Nodepools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListNodePoolsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListNodePoolsResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ListNodePoolsResponse>,
       callback?: BodyResponseCallback<Schema$ListNodePoolsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListNodePoolsResponse>,
       callback?: BodyResponseCallback<Schema$ListNodePoolsResponse>):
@@ -3017,14 +3021,14 @@ export class Resource$Projects$Locations$Clusters$Nodepools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  rollback(params: any, options?: MethodOptions):
+  rollback(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   rollback(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   rollback(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3072,14 +3076,14 @@ export class Resource$Projects$Locations$Clusters$Nodepools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setAutoscaling(params: any, options?: MethodOptions):
+  setAutoscaling(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setAutoscaling(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setAutoscaling(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3127,14 +3131,14 @@ export class Resource$Projects$Locations$Clusters$Nodepools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setManagement(params: any, options?: MethodOptions):
+  setManagement(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setManagement(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setManagement(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3182,13 +3186,14 @@ export class Resource$Projects$Locations$Clusters$Nodepools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setSize(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  setSize(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Operation>;
   setSize(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setSize(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3235,13 +3240,13 @@ export class Resource$Projects$Locations$Clusters$Nodepools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3301,12 +3306,12 @@ export class Resource$Projects$Locations$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancel(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  cancel(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   cancel(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   cancel(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -3354,11 +3359,11 @@ export class Resource$Projects$Locations$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3406,15 +3411,15 @@ export class Resource$Projects$Locations$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListOperationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>):
@@ -3537,14 +3542,14 @@ export class Resource$Projects$Zones {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getServerconfig(params: any, options?: MethodOptions):
+  getServerconfig(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ServerConfig>;
   getServerconfig(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ServerConfig>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ServerConfig>,
       callback?: BodyResponseCallback<Schema$ServerConfig>): void;
   getServerconfig(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ServerConfig>,
       callback?: BodyResponseCallback<Schema$ServerConfig>):
       void|AxiosPromise<Schema$ServerConfig> {
@@ -3671,13 +3676,13 @@ export class Resource$Projects$Zones$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  addons(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  addons(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   addons(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   addons(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3793,14 +3798,14 @@ export class Resource$Projects$Zones$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  completeIpRotation(params: any, options?: MethodOptions):
+  completeIpRotation(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   completeIpRotation(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   completeIpRotation(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3918,13 +3923,13 @@ export class Resource$Projects$Zones$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -4037,13 +4042,13 @@ export class Resource$Projects$Zones$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -4155,10 +4160,12 @@ export class Resource$Projects$Zones$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Cluster>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Cluster>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Cluster>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Cluster>,
       callback?: BodyResponseCallback<Schema$Cluster>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Cluster>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Cluster>,
       callback?: BodyResponseCallback<Schema$Cluster>):
       void|AxiosPromise<Schema$Cluster> {
     if (typeof options === 'function') {
@@ -4271,14 +4278,14 @@ export class Resource$Projects$Zones$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  legacyAbac(params: any, options?: MethodOptions):
+  legacyAbac(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   legacyAbac(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   legacyAbac(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -4388,14 +4395,14 @@ export class Resource$Projects$Zones$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListClustersResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListClustersResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListClustersResponse>,
       callback?: BodyResponseCallback<Schema$ListClustersResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListClustersResponse>,
       callback?: BodyResponseCallback<Schema$ListClustersResponse>):
       void|AxiosPromise<Schema$ListClustersResponse> {
@@ -4508,14 +4515,14 @@ export class Resource$Projects$Zones$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  locations(params: any, options?: MethodOptions):
+  locations(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   locations(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   locations(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -4630,13 +4637,14 @@ export class Resource$Projects$Zones$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  logging(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  logging(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Operation>;
   logging(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   logging(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -4751,13 +4759,13 @@ export class Resource$Projects$Zones$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  master(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  master(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   master(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   master(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -4872,14 +4880,14 @@ export class Resource$Projects$Zones$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  monitoring(params: any, options?: MethodOptions):
+  monitoring(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   monitoring(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   monitoring(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -4995,14 +5003,14 @@ export class Resource$Projects$Zones$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resourceLabels(params: any, options?: MethodOptions):
+  resourceLabels(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   resourceLabels(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   resourceLabels(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -5117,14 +5125,14 @@ export class Resource$Projects$Zones$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setMaintenancePolicy(params: any, options?: MethodOptions):
+  setMaintenancePolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setMaintenancePolicy(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setMaintenancePolicy(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -5241,14 +5249,14 @@ export class Resource$Projects$Zones$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setMasterAuth(params: any, options?: MethodOptions):
+  setMasterAuth(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setMasterAuth(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setMasterAuth(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -5364,14 +5372,14 @@ export class Resource$Projects$Zones$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setNetworkPolicy(params: any, options?: MethodOptions):
+  setNetworkPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setNetworkPolicy(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setNetworkPolicy(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -5487,14 +5495,14 @@ export class Resource$Projects$Zones$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  startIpRotation(params: any, options?: MethodOptions):
+  startIpRotation(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   startIpRotation(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   startIpRotation(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -5611,13 +5619,13 @@ export class Resource$Projects$Zones$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -5746,14 +5754,14 @@ export class Resource$Projects$Zones$Clusters$Nodepools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  autoscaling(params: any, options?: MethodOptions):
+  autoscaling(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   autoscaling(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   autoscaling(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -5869,13 +5877,13 @@ export class Resource$Projects$Zones$Clusters$Nodepools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -5991,13 +5999,13 @@ export class Resource$Projects$Zones$Clusters$Nodepools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -6113,10 +6121,11 @@ export class Resource$Projects$Zones$Clusters$Nodepools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$NodePool>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$NodePool>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$NodePool>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$NodePool>,
       callback?: BodyResponseCallback<Schema$NodePool>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$NodePool>,
       callback?: BodyResponseCallback<Schema$NodePool>):
       void|AxiosPromise<Schema$NodePool> {
@@ -6228,14 +6237,15 @@ export class Resource$Projects$Zones$Clusters$Nodepools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListNodePoolsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListNodePoolsResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ListNodePoolsResponse>,
       callback?: BodyResponseCallback<Schema$ListNodePoolsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListNodePoolsResponse>,
       callback?: BodyResponseCallback<Schema$ListNodePoolsResponse>):
@@ -6356,14 +6366,14 @@ export class Resource$Projects$Zones$Clusters$Nodepools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  rollback(params: any, options?: MethodOptions):
+  rollback(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   rollback(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   rollback(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -6482,14 +6492,14 @@ export class Resource$Projects$Zones$Clusters$Nodepools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setManagement(params: any, options?: MethodOptions):
+  setManagement(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setManagement(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setManagement(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -6608,13 +6618,14 @@ export class Resource$Projects$Zones$Clusters$Nodepools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setSize(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  setSize(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Operation>;
   setSize(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setSize(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -6733,13 +6744,13 @@ export class Resource$Projects$Zones$Clusters$Nodepools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -6865,12 +6876,12 @@ export class Resource$Projects$Zones$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancel(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  cancel(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   cancel(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   cancel(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -6980,11 +6991,11 @@ export class Resource$Projects$Zones$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -7091,15 +7102,15 @@ export class Resource$Projects$Zones$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListOperationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>):
diff --git a/src/apis/container/v1beta1.ts b/src/apis/container/v1beta1.ts
index 25027ec067..6c99f1937f 100644
--- a/src/apis/container/v1beta1.ts
+++ b/src/apis/container/v1beta1.ts
@@ -1848,14 +1848,14 @@ export class Resource$Projects$Locations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getServerConfig(params: any, options?: MethodOptions):
+  getServerConfig(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ServerConfig>;
   getServerConfig(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ServerConfig>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ServerConfig>,
       callback?: BodyResponseCallback<Schema$ServerConfig>): void;
   getServerConfig(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ServerConfig>,
       callback?: BodyResponseCallback<Schema$ServerConfig>):
       void|AxiosPromise<Schema$ServerConfig> {
@@ -1916,14 +1916,14 @@ export class Resource$Projects$Locations$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  completeIpRotation(params: any, options?: MethodOptions):
+  completeIpRotation(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   completeIpRotation(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   completeIpRotation(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1978,13 +1978,13 @@ export class Resource$Projects$Locations$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2038,13 +2038,13 @@ export class Resource$Projects$Locations$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2093,10 +2093,12 @@ export class Resource$Projects$Locations$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Cluster>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Cluster>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Cluster>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Cluster>,
       callback?: BodyResponseCallback<Schema$Cluster>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Cluster>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Cluster>,
       callback?: BodyResponseCallback<Schema$Cluster>):
       void|AxiosPromise<Schema$Cluster> {
     if (typeof options === 'function') {
@@ -2144,14 +2146,14 @@ export class Resource$Projects$Locations$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListClustersResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListClustersResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListClustersResponse>,
       callback?: BodyResponseCallback<Schema$ListClustersResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListClustersResponse>,
       callback?: BodyResponseCallback<Schema$ListClustersResponse>):
       void|AxiosPromise<Schema$ListClustersResponse> {
@@ -2199,14 +2201,14 @@ export class Resource$Projects$Locations$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setAddons(params: any, options?: MethodOptions):
+  setAddons(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setAddons(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setAddons(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2254,14 +2256,14 @@ export class Resource$Projects$Locations$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setLegacyAbac(params: any, options?: MethodOptions):
+  setLegacyAbac(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setLegacyAbac(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setLegacyAbac(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2309,14 +2311,14 @@ export class Resource$Projects$Locations$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setLocations(params: any, options?: MethodOptions):
+  setLocations(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setLocations(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setLocations(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2364,14 +2366,14 @@ export class Resource$Projects$Locations$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setLogging(params: any, options?: MethodOptions):
+  setLogging(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setLogging(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setLogging(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2419,14 +2421,14 @@ export class Resource$Projects$Locations$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setMaintenancePolicy(params: any, options?: MethodOptions):
+  setMaintenancePolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setMaintenancePolicy(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setMaintenancePolicy(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2477,14 +2479,14 @@ export class Resource$Projects$Locations$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setMasterAuth(params: any, options?: MethodOptions):
+  setMasterAuth(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setMasterAuth(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setMasterAuth(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2532,14 +2534,14 @@ export class Resource$Projects$Locations$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setMonitoring(params: any, options?: MethodOptions):
+  setMonitoring(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setMonitoring(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setMonitoring(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2587,14 +2589,14 @@ export class Resource$Projects$Locations$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setNetworkPolicy(params: any, options?: MethodOptions):
+  setNetworkPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setNetworkPolicy(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setNetworkPolicy(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2642,14 +2644,14 @@ export class Resource$Projects$Locations$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setResourceLabels(params: any, options?: MethodOptions):
+  setResourceLabels(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setResourceLabels(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setResourceLabels(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2697,14 +2699,14 @@ export class Resource$Projects$Locations$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  startIpRotation(params: any, options?: MethodOptions):
+  startIpRotation(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   startIpRotation(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   startIpRotation(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2752,13 +2754,13 @@ export class Resource$Projects$Locations$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2805,14 +2807,14 @@ export class Resource$Projects$Locations$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  updateMaster(params: any, options?: MethodOptions):
+  updateMaster(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   updateMaster(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   updateMaster(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2871,13 +2873,13 @@ export class Resource$Projects$Locations$Clusters$Nodepools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2928,13 +2930,13 @@ export class Resource$Projects$Locations$Clusters$Nodepools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2984,10 +2986,11 @@ export class Resource$Projects$Locations$Clusters$Nodepools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$NodePool>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$NodePool>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$NodePool>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$NodePool>,
       callback?: BodyResponseCallback<Schema$NodePool>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$NodePool>,
       callback?: BodyResponseCallback<Schema$NodePool>):
       void|AxiosPromise<Schema$NodePool> {
@@ -3036,14 +3039,15 @@ export class Resource$Projects$Locations$Clusters$Nodepools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListNodePoolsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListNodePoolsResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ListNodePoolsResponse>,
       callback?: BodyResponseCallback<Schema$ListNodePoolsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListNodePoolsResponse>,
       callback?: BodyResponseCallback<Schema$ListNodePoolsResponse>):
@@ -3093,14 +3097,14 @@ export class Resource$Projects$Locations$Clusters$Nodepools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  rollback(params: any, options?: MethodOptions):
+  rollback(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   rollback(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   rollback(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3148,14 +3152,14 @@ export class Resource$Projects$Locations$Clusters$Nodepools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setAutoscaling(params: any, options?: MethodOptions):
+  setAutoscaling(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setAutoscaling(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setAutoscaling(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3203,14 +3207,14 @@ export class Resource$Projects$Locations$Clusters$Nodepools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setManagement(params: any, options?: MethodOptions):
+  setManagement(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setManagement(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setManagement(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3258,13 +3262,14 @@ export class Resource$Projects$Locations$Clusters$Nodepools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setSize(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  setSize(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Operation>;
   setSize(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setSize(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3312,13 +3317,13 @@ export class Resource$Projects$Locations$Clusters$Nodepools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3378,12 +3383,12 @@ export class Resource$Projects$Locations$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancel(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  cancel(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   cancel(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   cancel(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -3432,11 +3437,11 @@ export class Resource$Projects$Locations$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3484,15 +3489,15 @@ export class Resource$Projects$Locations$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListOperationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>):
@@ -3559,14 +3564,14 @@ export class Resource$Projects$Zones {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getServerconfig(params: any, options?: MethodOptions):
+  getServerconfig(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ServerConfig>;
   getServerconfig(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ServerConfig>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ServerConfig>,
       callback?: BodyResponseCallback<Schema$ServerConfig>): void;
   getServerconfig(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ServerConfig>,
       callback?: BodyResponseCallback<Schema$ServerConfig>):
       void|AxiosPromise<Schema$ServerConfig> {
@@ -3630,13 +3635,13 @@ export class Resource$Projects$Zones$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  addons(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  addons(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   addons(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   addons(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3688,14 +3693,14 @@ export class Resource$Projects$Zones$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  completeIpRotation(params: any, options?: MethodOptions):
+  completeIpRotation(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   completeIpRotation(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   completeIpRotation(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3753,13 +3758,13 @@ export class Resource$Projects$Zones$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3814,13 +3819,13 @@ export class Resource$Projects$Zones$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3872,10 +3877,12 @@ export class Resource$Projects$Zones$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Cluster>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Cluster>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Cluster>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Cluster>,
       callback?: BodyResponseCallback<Schema$Cluster>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Cluster>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Cluster>,
       callback?: BodyResponseCallback<Schema$Cluster>):
       void|AxiosPromise<Schema$Cluster> {
     if (typeof options === 'function') {
@@ -3926,14 +3933,14 @@ export class Resource$Projects$Zones$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  legacyAbac(params: any, options?: MethodOptions):
+  legacyAbac(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   legacyAbac(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   legacyAbac(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3985,14 +3992,14 @@ export class Resource$Projects$Zones$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListClustersResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListClustersResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListClustersResponse>,
       callback?: BodyResponseCallback<Schema$ListClustersResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListClustersResponse>,
       callback?: BodyResponseCallback<Schema$ListClustersResponse>):
       void|AxiosPromise<Schema$ListClustersResponse> {
@@ -4043,14 +4050,14 @@ export class Resource$Projects$Zones$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  locations(params: any, options?: MethodOptions):
+  locations(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   locations(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   locations(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -4102,13 +4109,14 @@ export class Resource$Projects$Zones$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  logging(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  logging(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Operation>;
   logging(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   logging(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -4160,13 +4168,13 @@ export class Resource$Projects$Zones$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  master(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  master(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   master(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   master(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -4218,14 +4226,14 @@ export class Resource$Projects$Zones$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  monitoring(params: any, options?: MethodOptions):
+  monitoring(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   monitoring(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   monitoring(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -4277,14 +4285,14 @@ export class Resource$Projects$Zones$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resourceLabels(params: any, options?: MethodOptions):
+  resourceLabels(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   resourceLabels(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   resourceLabels(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -4336,14 +4344,14 @@ export class Resource$Projects$Zones$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setMaintenancePolicy(params: any, options?: MethodOptions):
+  setMaintenancePolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setMaintenancePolicy(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setMaintenancePolicy(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -4398,14 +4406,14 @@ export class Resource$Projects$Zones$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setMasterAuth(params: any, options?: MethodOptions):
+  setMasterAuth(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setMasterAuth(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setMasterAuth(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -4457,14 +4465,14 @@ export class Resource$Projects$Zones$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setNetworkPolicy(params: any, options?: MethodOptions):
+  setNetworkPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setNetworkPolicy(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setNetworkPolicy(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -4516,14 +4524,14 @@ export class Resource$Projects$Zones$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  startIpRotation(params: any, options?: MethodOptions):
+  startIpRotation(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   startIpRotation(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   startIpRotation(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -4575,13 +4583,13 @@ export class Resource$Projects$Zones$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -4645,14 +4653,14 @@ export class Resource$Projects$Zones$Clusters$Nodepools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  autoscaling(params: any, options?: MethodOptions):
+  autoscaling(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   autoscaling(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   autoscaling(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -4704,13 +4712,13 @@ export class Resource$Projects$Zones$Clusters$Nodepools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -4763,13 +4771,13 @@ export class Resource$Projects$Zones$Clusters$Nodepools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -4822,10 +4830,11 @@ export class Resource$Projects$Zones$Clusters$Nodepools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$NodePool>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$NodePool>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$NodePool>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$NodePool>,
       callback?: BodyResponseCallback<Schema$NodePool>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$NodePool>,
       callback?: BodyResponseCallback<Schema$NodePool>):
       void|AxiosPromise<Schema$NodePool> {
@@ -4877,14 +4886,15 @@ export class Resource$Projects$Zones$Clusters$Nodepools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListNodePoolsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListNodePoolsResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ListNodePoolsResponse>,
       callback?: BodyResponseCallback<Schema$ListNodePoolsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListNodePoolsResponse>,
       callback?: BodyResponseCallback<Schema$ListNodePoolsResponse>):
@@ -4939,14 +4949,14 @@ export class Resource$Projects$Zones$Clusters$Nodepools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  rollback(params: any, options?: MethodOptions):
+  rollback(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   rollback(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   rollback(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -4999,14 +5009,14 @@ export class Resource$Projects$Zones$Clusters$Nodepools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setManagement(params: any, options?: MethodOptions):
+  setManagement(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setManagement(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setManagement(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -5059,13 +5069,14 @@ export class Resource$Projects$Zones$Clusters$Nodepools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setSize(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  setSize(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Operation>;
   setSize(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setSize(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -5118,13 +5129,13 @@ export class Resource$Projects$Zones$Clusters$Nodepools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -5189,12 +5200,12 @@ export class Resource$Projects$Zones$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancel(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  cancel(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   cancel(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   cancel(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -5245,11 +5256,11 @@ export class Resource$Projects$Zones$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -5300,15 +5311,15 @@ export class Resource$Projects$Zones$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListOperationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>):
diff --git a/src/apis/content/v2.ts b/src/apis/content/v2.ts
index f3191cf3f5..9ea14cf490 100644
--- a/src/apis/content/v2.ts
+++ b/src/apis/content/v2.ts
@@ -4754,15 +4754,15 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  authinfo(params: any, options?: MethodOptions):
+  authinfo(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AccountsAuthInfoResponse>;
   authinfo(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AccountsAuthInfoResponse>,
       callback?: BodyResponseCallback<Schema$AccountsAuthInfoResponse>): void;
   authinfo(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AccountsAuthInfoResponse>,
       callback?: BodyResponseCallback<Schema$AccountsAuthInfoResponse>):
@@ -4812,16 +4812,16 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  claimwebsite(params: any, options?: MethodOptions):
+  claimwebsite(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AccountsClaimWebsiteResponse>;
   claimwebsite(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AccountsClaimWebsiteResponse>,
       callback?: BodyResponseCallback<Schema$AccountsClaimWebsiteResponse>):
       void;
   claimwebsite(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AccountsClaimWebsiteResponse>,
       callback?: BodyResponseCallback<Schema$AccountsClaimWebsiteResponse>):
@@ -4873,16 +4873,16 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  custombatch(params: any, options?: MethodOptions):
+  custombatch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AccountsCustomBatchResponse>;
   custombatch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AccountsCustomBatchResponse>,
       callback?: BodyResponseCallback<Schema$AccountsCustomBatchResponse>):
       void;
   custombatch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AccountsCustomBatchResponse>,
       callback?: BodyResponseCallback<Schema$AccountsCustomBatchResponse>):
@@ -4934,12 +4934,12 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -4985,10 +4985,12 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Account>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Account>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>):
       void|AxiosPromise<Schema$Account> {
     if (typeof options === 'function') {
@@ -5036,12 +5038,14 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Account>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Account>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>):
       void|AxiosPromise<Schema$Account> {
     if (typeof options === 'function') {
@@ -5089,14 +5093,14 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AccountsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AccountsListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AccountsListResponse>,
       callback?: BodyResponseCallback<Schema$AccountsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AccountsListResponse>,
       callback?: BodyResponseCallback<Schema$AccountsListResponse>):
       void|AxiosPromise<Schema$AccountsListResponse> {
@@ -5147,12 +5151,14 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Account>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Account>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>):
       void|AxiosPromise<Schema$Account> {
     if (typeof options === 'function') {
@@ -5201,12 +5207,14 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Account>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Account>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>):
       void|AxiosPromise<Schema$Account> {
     if (typeof options === 'function') {
@@ -5263,17 +5271,17 @@ export class Resource$Accountstatuses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  custombatch(params: any, options?: MethodOptions):
+  custombatch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AccountstatusesCustomBatchResponse>;
   custombatch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AccountstatusesCustomBatchResponse>,
       callback?:
           BodyResponseCallback<Schema$AccountstatusesCustomBatchResponse>):
       void;
   custombatch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AccountstatusesCustomBatchResponse>,
       callback?:
@@ -5325,11 +5333,12 @@ export class Resource$Accountstatuses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$AccountStatus>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AccountStatus>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$AccountStatus>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AccountStatus>,
       callback?: BodyResponseCallback<Schema$AccountStatus>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AccountStatus>,
       callback?: BodyResponseCallback<Schema$AccountStatus>):
       void|AxiosPromise<Schema$AccountStatus> {
@@ -5380,16 +5389,16 @@ export class Resource$Accountstatuses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AccountstatusesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AccountstatusesListResponse>,
       callback?: BodyResponseCallback<Schema$AccountstatusesListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AccountstatusesListResponse>,
       callback?: BodyResponseCallback<Schema$AccountstatusesListResponse>):
@@ -5452,16 +5461,16 @@ export class Resource$Accounttax {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  custombatch(params: any, options?: MethodOptions):
+  custombatch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AccounttaxCustomBatchResponse>;
   custombatch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AccounttaxCustomBatchResponse>,
       callback?: BodyResponseCallback<Schema$AccounttaxCustomBatchResponse>):
       void;
   custombatch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AccounttaxCustomBatchResponse>,
       callback?: BodyResponseCallback<Schema$AccounttaxCustomBatchResponse>):
@@ -5511,11 +5520,11 @@ export class Resource$Accounttax {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$AccountTax>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AccountTax>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$AccountTax>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AccountTax>,
       callback?: BodyResponseCallback<Schema$AccountTax>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AccountTax>,
       callback?: BodyResponseCallback<Schema$AccountTax>):
       void|AxiosPromise<Schema$AccountTax> {
@@ -5565,15 +5574,15 @@ export class Resource$Accounttax {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AccounttaxListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AccounttaxListResponse>,
       callback?: BodyResponseCallback<Schema$AccounttaxListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AccounttaxListResponse>,
       callback?: BodyResponseCallback<Schema$AccounttaxListResponse>):
@@ -5625,13 +5634,13 @@ export class Resource$Accounttax {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$AccountTax>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$AccountTax>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AccountTax>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AccountTax>,
       callback?: BodyResponseCallback<Schema$AccountTax>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AccountTax>,
       callback?: BodyResponseCallback<Schema$AccountTax>):
       void|AxiosPromise<Schema$AccountTax> {
@@ -5681,13 +5690,14 @@ export class Resource$Accounttax {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$AccountTax>;
+  update(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$AccountTax>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AccountTax>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AccountTax>,
       callback?: BodyResponseCallback<Schema$AccountTax>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AccountTax>,
       callback?: BodyResponseCallback<Schema$AccountTax>):
       void|AxiosPromise<Schema$AccountTax> {
@@ -5746,16 +5756,16 @@ export class Resource$Datafeeds {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  custombatch(params: any, options?: MethodOptions):
+  custombatch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DatafeedsCustomBatchResponse>;
   custombatch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$DatafeedsCustomBatchResponse>,
       callback?: BodyResponseCallback<Schema$DatafeedsCustomBatchResponse>):
       void;
   custombatch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$DatafeedsCustomBatchResponse>,
       callback?: BodyResponseCallback<Schema$DatafeedsCustomBatchResponse>):
@@ -5806,12 +5816,12 @@ export class Resource$Datafeeds {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -5857,10 +5867,11 @@ export class Resource$Datafeeds {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Datafeed>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Datafeed>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Datafeed>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Datafeed>,
       callback?: BodyResponseCallback<Schema$Datafeed>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Datafeed>,
       callback?: BodyResponseCallback<Schema$Datafeed>):
       void|AxiosPromise<Schema$Datafeed> {
@@ -5909,12 +5920,13 @@ export class Resource$Datafeeds {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Datafeed>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Datafeed>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Datafeed>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Datafeed>,
       callback?: BodyResponseCallback<Schema$Datafeed>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Datafeed>,
       callback?: BodyResponseCallback<Schema$Datafeed>):
       void|AxiosPromise<Schema$Datafeed> {
@@ -5964,14 +5976,15 @@ export class Resource$Datafeeds {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DatafeedsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DatafeedsListResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$DatafeedsListResponse>,
       callback?: BodyResponseCallback<Schema$DatafeedsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$DatafeedsListResponse>,
       callback?: BodyResponseCallback<Schema$DatafeedsListResponse>):
@@ -6023,12 +6036,13 @@ export class Resource$Datafeeds {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Datafeed>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Datafeed>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Datafeed>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Datafeed>,
       callback?: BodyResponseCallback<Schema$Datafeed>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Datafeed>,
       callback?: BodyResponseCallback<Schema$Datafeed>):
       void|AxiosPromise<Schema$Datafeed> {
@@ -6078,12 +6092,13 @@ export class Resource$Datafeeds {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Datafeed>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Datafeed>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Datafeed>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Datafeed>,
       callback?: BodyResponseCallback<Schema$Datafeed>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Datafeed>,
       callback?: BodyResponseCallback<Schema$Datafeed>):
       void|AxiosPromise<Schema$Datafeed> {
@@ -6141,17 +6156,17 @@ export class Resource$Datafeedstatuses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  custombatch(params: any, options?: MethodOptions):
+  custombatch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DatafeedstatusesCustomBatchResponse>;
   custombatch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$DatafeedstatusesCustomBatchResponse>,
       callback?:
           BodyResponseCallback<Schema$DatafeedstatusesCustomBatchResponse>):
       void;
   custombatch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$DatafeedstatusesCustomBatchResponse>,
       callback?:
@@ -6205,12 +6220,12 @@ export class Resource$Datafeedstatuses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$DatafeedStatus>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DatafeedStatus>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DatafeedStatus>,
       callback?: BodyResponseCallback<Schema$DatafeedStatus>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DatafeedStatus>,
       callback?: BodyResponseCallback<Schema$DatafeedStatus>):
       void|AxiosPromise<Schema$DatafeedStatus> {
@@ -6260,16 +6275,16 @@ export class Resource$Datafeedstatuses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DatafeedstatusesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$DatafeedstatusesListResponse>,
       callback?: BodyResponseCallback<Schema$DatafeedstatusesListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$DatafeedstatusesListResponse>,
       callback?: BodyResponseCallback<Schema$DatafeedstatusesListResponse>):
@@ -6333,16 +6348,16 @@ export class Resource$Inventory {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  custombatch(params: any, options?: MethodOptions):
+  custombatch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InventoryCustomBatchResponse>;
   custombatch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InventoryCustomBatchResponse>,
       callback?: BodyResponseCallback<Schema$InventoryCustomBatchResponse>):
       void;
   custombatch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InventoryCustomBatchResponse>,
       callback?: BodyResponseCallback<Schema$InventoryCustomBatchResponse>):
@@ -6396,12 +6411,12 @@ export class Resource$Inventory {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  set(params: any,
+  set(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$InventorySetResponse>;
-  set(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InventorySetResponse>,
+  set(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InventorySetResponse>,
       callback?: BodyResponseCallback<Schema$InventorySetResponse>): void;
-  set(params: any,
+  set(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InventorySetResponse>,
       callback?: BodyResponseCallback<Schema$InventorySetResponse>):
       void|AxiosPromise<Schema$InventorySetResponse> {
@@ -6464,16 +6479,16 @@ export class Resource$Liasettings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  custombatch(params: any, options?: MethodOptions):
+  custombatch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LiasettingsCustomBatchResponse>;
   custombatch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$LiasettingsCustomBatchResponse>,
       callback?: BodyResponseCallback<Schema$LiasettingsCustomBatchResponse>):
       void;
   custombatch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$LiasettingsCustomBatchResponse>,
       callback?: BodyResponseCallback<Schema$LiasettingsCustomBatchResponse>):
@@ -6524,11 +6539,11 @@ export class Resource$Liasettings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$LiaSettings>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LiaSettings>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$LiaSettings>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LiaSettings>,
       callback?: BodyResponseCallback<Schema$LiaSettings>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LiaSettings>,
       callback?: BodyResponseCallback<Schema$LiaSettings>):
       void|AxiosPromise<Schema$LiaSettings> {
@@ -6576,16 +6591,16 @@ export class Resource$Liasettings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getaccessiblegmbaccounts(params: any, options?: MethodOptions):
+  getaccessiblegmbaccounts(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LiasettingsGetAccessibleGmbAccountsResponse>;
   getaccessiblegmbaccounts(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$LiasettingsGetAccessibleGmbAccountsResponse>,
       callback?: BodyResponseCallback<
           Schema$LiasettingsGetAccessibleGmbAccountsResponse>): void;
   getaccessiblegmbaccounts(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$LiasettingsGetAccessibleGmbAccountsResponse>,
       callback?: BodyResponseCallback<
@@ -6641,15 +6656,15 @@ export class Resource$Liasettings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LiasettingsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$LiasettingsListResponse>,
       callback?: BodyResponseCallback<Schema$LiasettingsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$LiasettingsListResponse>,
       callback?: BodyResponseCallback<Schema$LiasettingsListResponse>):
@@ -6701,13 +6716,14 @@ export class Resource$Liasettings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$LiaSettings>;
+  patch(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$LiaSettings>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LiaSettings>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LiaSettings>,
       callback?: BodyResponseCallback<Schema$LiaSettings>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LiaSettings>,
       callback?: BodyResponseCallback<Schema$LiaSettings>):
       void|AxiosPromise<Schema$LiaSettings> {
@@ -6756,17 +6772,17 @@ export class Resource$Liasettings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  requestgmbaccess(params: any, options?: MethodOptions):
+  requestgmbaccess(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LiasettingsRequestGmbAccessResponse>;
   requestgmbaccess(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$LiasettingsRequestGmbAccessResponse>,
       callback?:
           BodyResponseCallback<Schema$LiasettingsRequestGmbAccessResponse>):
       void;
   requestgmbaccess(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$LiasettingsRequestGmbAccessResponse>,
       callback?:
@@ -6821,16 +6837,16 @@ export class Resource$Liasettings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  requestinventoryverification(params: any, options?: MethodOptions):
+  requestinventoryverification(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LiasettingsRequestInventoryVerificationResponse>;
   requestinventoryverification(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$LiasettingsRequestInventoryVerificationResponse>,
       callback?: BodyResponseCallback<
           Schema$LiasettingsRequestInventoryVerificationResponse>): void;
   requestinventoryverification(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$LiasettingsRequestInventoryVerificationResponse>,
       callback?: BodyResponseCallback<
@@ -6888,16 +6904,16 @@ export class Resource$Liasettings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setinventoryverificationcontact(params: any, options?: MethodOptions):
+  setinventoryverificationcontact(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LiasettingsSetInventoryVerificationContactResponse>;
   setinventoryverificationcontact(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$LiasettingsSetInventoryVerificationContactResponse>,
       callback?: BodyResponseCallback<
           Schema$LiasettingsSetInventoryVerificationContactResponse>): void;
   setinventoryverificationcontact(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$LiasettingsSetInventoryVerificationContactResponse>,
       callback?: BodyResponseCallback<
@@ -6955,14 +6971,14 @@ export class Resource$Liasettings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LiaSettings>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LiaSettings>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LiaSettings>,
       callback?: BodyResponseCallback<Schema$LiaSettings>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LiaSettings>,
       callback?: BodyResponseCallback<Schema$LiaSettings>):
       void|AxiosPromise<Schema$LiaSettings> {
@@ -7023,15 +7039,15 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  acknowledge(params: any, options?: MethodOptions):
+  acknowledge(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersAcknowledgeResponse>;
   acknowledge(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersAcknowledgeResponse>,
       callback?: BodyResponseCallback<Schema$OrdersAcknowledgeResponse>): void;
   acknowledge(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersAcknowledgeResponse>,
       callback?: BodyResponseCallback<Schema$OrdersAcknowledgeResponse>):
@@ -7082,16 +7098,16 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  advancetestorder(params: any, options?: MethodOptions):
+  advancetestorder(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersAdvanceTestOrderResponse>;
   advancetestorder(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersAdvanceTestOrderResponse>,
       callback?: BodyResponseCallback<Schema$OrdersAdvanceTestOrderResponse>):
       void;
   advancetestorder(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersAdvanceTestOrderResponse>,
       callback?: BodyResponseCallback<Schema$OrdersAdvanceTestOrderResponse>):
@@ -7144,14 +7160,14 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancel(params: any, options?: MethodOptions):
+  cancel(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersCancelResponse>;
   cancel(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$OrdersCancelResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OrdersCancelResponse>,
       callback?: BodyResponseCallback<Schema$OrdersCancelResponse>): void;
   cancel(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$OrdersCancelResponse>,
       callback?: BodyResponseCallback<Schema$OrdersCancelResponse>):
       void|AxiosPromise<Schema$OrdersCancelResponse> {
@@ -7200,16 +7216,16 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancellineitem(params: any, options?: MethodOptions):
+  cancellineitem(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersCancelLineItemResponse>;
   cancellineitem(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersCancelLineItemResponse>,
       callback?: BodyResponseCallback<Schema$OrdersCancelLineItemResponse>):
       void;
   cancellineitem(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersCancelLineItemResponse>,
       callback?: BodyResponseCallback<Schema$OrdersCancelLineItemResponse>):
@@ -7260,16 +7276,16 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  createtestorder(params: any, options?: MethodOptions):
+  createtestorder(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersCreateTestOrderResponse>;
   createtestorder(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersCreateTestOrderResponse>,
       callback?: BodyResponseCallback<Schema$OrdersCreateTestOrderResponse>):
       void;
   createtestorder(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersCreateTestOrderResponse>,
       callback?: BodyResponseCallback<Schema$OrdersCreateTestOrderResponse>):
@@ -7318,15 +7334,15 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  custombatch(params: any, options?: MethodOptions):
+  custombatch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersCustomBatchResponse>;
   custombatch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersCustomBatchResponse>,
       callback?: BodyResponseCallback<Schema$OrdersCustomBatchResponse>): void;
   custombatch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersCustomBatchResponse>,
       callback?: BodyResponseCallback<Schema$OrdersCustomBatchResponse>):
@@ -7375,10 +7391,10 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Order>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Order>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Order>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Order>,
       callback?: BodyResponseCallback<Schema$Order>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Order>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Order>,
       callback?: BodyResponseCallback<Schema$Order>):
       void|AxiosPromise<Schema$Order> {
     if (typeof options === 'function') {
@@ -7425,17 +7441,17 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getbymerchantorderid(params: any, options?: MethodOptions):
+  getbymerchantorderid(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersGetByMerchantOrderIdResponse>;
   getbymerchantorderid(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersGetByMerchantOrderIdResponse>,
       callback?:
           BodyResponseCallback<Schema$OrdersGetByMerchantOrderIdResponse>):
       void;
   getbymerchantorderid(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersGetByMerchantOrderIdResponse>,
       callback?:
@@ -7490,17 +7506,17 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  gettestordertemplate(params: any, options?: MethodOptions):
+  gettestordertemplate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersGetTestOrderTemplateResponse>;
   gettestordertemplate(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersGetTestOrderTemplateResponse>,
       callback?:
           BodyResponseCallback<Schema$OrdersGetTestOrderTemplateResponse>):
       void;
   gettestordertemplate(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersGetTestOrderTemplateResponse>,
       callback?:
@@ -7554,17 +7570,17 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  instorerefundlineitem(params: any, options?: MethodOptions):
+  instorerefundlineitem(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersInStoreRefundLineItemResponse>;
   instorerefundlineitem(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersInStoreRefundLineItemResponse>,
       callback?:
           BodyResponseCallback<Schema$OrdersInStoreRefundLineItemResponse>):
       void;
   instorerefundlineitem(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersInStoreRefundLineItemResponse>,
       callback?:
@@ -7624,14 +7640,14 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$OrdersListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OrdersListResponse>,
       callback?: BodyResponseCallback<Schema$OrdersListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$OrdersListResponse>,
       callback?: BodyResponseCallback<Schema$OrdersListResponse>):
       void|AxiosPromise<Schema$OrdersListResponse> {
@@ -7680,14 +7696,14 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  refund(params: any, options?: MethodOptions):
+  refund(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersRefundResponse>;
   refund(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$OrdersRefundResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OrdersRefundResponse>,
       callback?: BodyResponseCallback<Schema$OrdersRefundResponse>): void;
   refund(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$OrdersRefundResponse>,
       callback?: BodyResponseCallback<Schema$OrdersRefundResponse>):
       void|AxiosPromise<Schema$OrdersRefundResponse> {
@@ -7736,17 +7752,17 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  rejectreturnlineitem(params: any, options?: MethodOptions):
+  rejectreturnlineitem(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersRejectReturnLineItemResponse>;
   rejectreturnlineitem(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersRejectReturnLineItemResponse>,
       callback?:
           BodyResponseCallback<Schema$OrdersRejectReturnLineItemResponse>):
       void;
   rejectreturnlineitem(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersRejectReturnLineItemResponse>,
       callback?:
@@ -7801,16 +7817,16 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  returnlineitem(params: any, options?: MethodOptions):
+  returnlineitem(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersReturnLineItemResponse>;
   returnlineitem(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersReturnLineItemResponse>,
       callback?: BodyResponseCallback<Schema$OrdersReturnLineItemResponse>):
       void;
   returnlineitem(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersReturnLineItemResponse>,
       callback?: BodyResponseCallback<Schema$OrdersReturnLineItemResponse>):
@@ -7863,17 +7879,17 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  returnrefundlineitem(params: any, options?: MethodOptions):
+  returnrefundlineitem(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersReturnRefundLineItemResponse>;
   returnrefundlineitem(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersReturnRefundLineItemResponse>,
       callback?:
           BodyResponseCallback<Schema$OrdersReturnRefundLineItemResponse>):
       void;
   returnrefundlineitem(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersReturnRefundLineItemResponse>,
       callback?:
@@ -7928,16 +7944,16 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setlineitemmetadata(params: any, options?: MethodOptions):
+  setlineitemmetadata(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersSetLineItemMetadataResponse>;
   setlineitemmetadata(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersSetLineItemMetadataResponse>,
       callback?:
           BodyResponseCallback<Schema$OrdersSetLineItemMetadataResponse>): void;
   setlineitemmetadata(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersSetLineItemMetadataResponse>,
       callback?:
@@ -7992,16 +8008,16 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  shiplineitems(params: any, options?: MethodOptions):
+  shiplineitems(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersShipLineItemsResponse>;
   shiplineitems(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersShipLineItemsResponse>,
       callback?: BodyResponseCallback<Schema$OrdersShipLineItemsResponse>):
       void;
   shiplineitems(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersShipLineItemsResponse>,
       callback?: BodyResponseCallback<Schema$OrdersShipLineItemsResponse>):
@@ -8053,16 +8069,16 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  updatelineitemshippingdetails(params: any, options?: MethodOptions):
+  updatelineitemshippingdetails(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersUpdateLineItemShippingDetailsResponse>;
   updatelineitemshippingdetails(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersUpdateLineItemShippingDetailsResponse>,
       callback?: BodyResponseCallback<
           Schema$OrdersUpdateLineItemShippingDetailsResponse>): void;
   updatelineitemshippingdetails(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersUpdateLineItemShippingDetailsResponse>,
       callback?: BodyResponseCallback<
@@ -8117,17 +8133,17 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  updatemerchantorderid(params: any, options?: MethodOptions):
+  updatemerchantorderid(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersUpdateMerchantOrderIdResponse>;
   updatemerchantorderid(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersUpdateMerchantOrderIdResponse>,
       callback?:
           BodyResponseCallback<Schema$OrdersUpdateMerchantOrderIdResponse>):
       void;
   updatemerchantorderid(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersUpdateMerchantOrderIdResponse>,
       callback?:
@@ -8182,16 +8198,16 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  updateshipment(params: any, options?: MethodOptions):
+  updateshipment(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersUpdateShipmentResponse>;
   updateshipment(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersUpdateShipmentResponse>,
       callback?: BodyResponseCallback<Schema$OrdersUpdateShipmentResponse>):
       void;
   updateshipment(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersUpdateShipmentResponse>,
       callback?: BodyResponseCallback<Schema$OrdersUpdateShipmentResponse>):
@@ -8254,15 +8270,15 @@ export class Resource$Pos {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  custombatch(params: any, options?: MethodOptions):
+  custombatch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PosCustomBatchResponse>;
   custombatch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$PosCustomBatchResponse>,
       callback?: BodyResponseCallback<Schema$PosCustomBatchResponse>): void;
   custombatch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$PosCustomBatchResponse>,
       callback?: BodyResponseCallback<Schema$PosCustomBatchResponse>):
@@ -8313,12 +8329,12 @@ export class Resource$Pos {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -8367,10 +8383,11 @@ export class Resource$Pos {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$PosStore>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$PosStore>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$PosStore>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PosStore>,
       callback?: BodyResponseCallback<Schema$PosStore>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PosStore>,
       callback?: BodyResponseCallback<Schema$PosStore>):
       void|AxiosPromise<Schema$PosStore> {
@@ -8422,12 +8439,13 @@ export class Resource$Pos {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$PosStore>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$PosStore>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$PosStore>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PosStore>,
       callback?: BodyResponseCallback<Schema$PosStore>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PosStore>,
       callback?: BodyResponseCallback<Schema$PosStore>):
       void|AxiosPromise<Schema$PosStore> {
@@ -8478,14 +8496,14 @@ export class Resource$Pos {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  inventory(params: any, options?: MethodOptions):
+  inventory(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PosInventoryResponse>;
   inventory(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PosInventoryResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PosInventoryResponse>,
       callback?: BodyResponseCallback<Schema$PosInventoryResponse>): void;
   inventory(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PosInventoryResponse>,
       callback?: BodyResponseCallback<Schema$PosInventoryResponse>):
       void|AxiosPromise<Schema$PosInventoryResponse> {
@@ -8534,14 +8552,14 @@ export class Resource$Pos {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PosListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PosListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PosListResponse>,
       callback?: BodyResponseCallback<Schema$PosListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PosListResponse>,
       callback?: BodyResponseCallback<Schema$PosListResponse>):
       void|AxiosPromise<Schema$PosListResponse> {
@@ -8592,14 +8610,14 @@ export class Resource$Pos {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  sale(params: any, options?: MethodOptions):
+  sale(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PosSaleResponse>;
   sale(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PosSaleResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PosSaleResponse>,
       callback?: BodyResponseCallback<Schema$PosSaleResponse>): void;
   sale(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PosSaleResponse>,
       callback?: BodyResponseCallback<Schema$PosSaleResponse>):
       void|AxiosPromise<Schema$PosSaleResponse> {
@@ -8661,16 +8679,16 @@ export class Resource$Products {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  custombatch(params: any, options?: MethodOptions):
+  custombatch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ProductsCustomBatchResponse>;
   custombatch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ProductsCustomBatchResponse>,
       callback?: BodyResponseCallback<Schema$ProductsCustomBatchResponse>):
       void;
   custombatch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ProductsCustomBatchResponse>,
       callback?: BodyResponseCallback<Schema$ProductsCustomBatchResponse>):
@@ -8721,12 +8739,12 @@ export class Resource$Products {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -8772,10 +8790,12 @@ export class Resource$Products {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Product>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Product>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Product>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Product>,
       callback?: BodyResponseCallback<Schema$Product>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Product>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Product>,
       callback?: BodyResponseCallback<Schema$Product>):
       void|AxiosPromise<Schema$Product> {
     if (typeof options === 'function') {
@@ -8825,12 +8845,14 @@ export class Resource$Products {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Product>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Product>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Product>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Product>,
       callback?: BodyResponseCallback<Schema$Product>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Product>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Product>,
       callback?: BodyResponseCallback<Schema$Product>):
       void|AxiosPromise<Schema$Product> {
     if (typeof options === 'function') {
@@ -8879,14 +8901,14 @@ export class Resource$Products {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ProductsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ProductsListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ProductsListResponse>,
       callback?: BodyResponseCallback<Schema$ProductsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ProductsListResponse>,
       callback?: BodyResponseCallback<Schema$ProductsListResponse>):
       void|AxiosPromise<Schema$ProductsListResponse> {
@@ -8946,17 +8968,17 @@ export class Resource$Productstatuses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  custombatch(params: any, options?: MethodOptions):
+  custombatch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ProductstatusesCustomBatchResponse>;
   custombatch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ProductstatusesCustomBatchResponse>,
       callback?:
           BodyResponseCallback<Schema$ProductstatusesCustomBatchResponse>):
       void;
   custombatch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ProductstatusesCustomBatchResponse>,
       callback?:
@@ -9009,11 +9031,12 @@ export class Resource$Productstatuses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$ProductStatus>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ProductStatus>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$ProductStatus>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ProductStatus>,
       callback?: BodyResponseCallback<Schema$ProductStatus>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ProductStatus>,
       callback?: BodyResponseCallback<Schema$ProductStatus>):
       void|AxiosPromise<Schema$ProductStatus> {
@@ -9065,16 +9088,16 @@ export class Resource$Productstatuses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ProductstatusesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ProductstatusesListResponse>,
       callback?: BodyResponseCallback<Schema$ProductstatusesListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ProductstatusesListResponse>,
       callback?: BodyResponseCallback<Schema$ProductstatusesListResponse>):
@@ -9137,17 +9160,17 @@ export class Resource$Shippingsettings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  custombatch(params: any, options?: MethodOptions):
+  custombatch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ShippingsettingsCustomBatchResponse>;
   custombatch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ShippingsettingsCustomBatchResponse>,
       callback?:
           BodyResponseCallback<Schema$ShippingsettingsCustomBatchResponse>):
       void;
   custombatch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ShippingsettingsCustomBatchResponse>,
       callback?:
@@ -9199,12 +9222,12 @@ export class Resource$Shippingsettings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$ShippingSettings>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ShippingSettings>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ShippingSettings>,
       callback?: BodyResponseCallback<Schema$ShippingSettings>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ShippingSettings>,
       callback?: BodyResponseCallback<Schema$ShippingSettings>):
       void|AxiosPromise<Schema$ShippingSettings> {
@@ -9252,16 +9275,16 @@ export class Resource$Shippingsettings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getsupportedcarriers(params: any, options?: MethodOptions):
+  getsupportedcarriers(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ShippingsettingsGetSupportedCarriersResponse>;
   getsupportedcarriers(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ShippingsettingsGetSupportedCarriersResponse>,
       callback?: BodyResponseCallback<
           Schema$ShippingsettingsGetSupportedCarriersResponse>): void;
   getsupportedcarriers(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ShippingsettingsGetSupportedCarriersResponse>,
       callback?: BodyResponseCallback<
@@ -9312,16 +9335,16 @@ export class Resource$Shippingsettings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getsupportedholidays(params: any, options?: MethodOptions):
+  getsupportedholidays(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ShippingsettingsGetSupportedHolidaysResponse>;
   getsupportedholidays(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ShippingsettingsGetSupportedHolidaysResponse>,
       callback?: BodyResponseCallback<
           Schema$ShippingsettingsGetSupportedHolidaysResponse>): void;
   getsupportedholidays(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ShippingsettingsGetSupportedHolidaysResponse>,
       callback?: BodyResponseCallback<
@@ -9375,16 +9398,16 @@ export class Resource$Shippingsettings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ShippingsettingsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ShippingsettingsListResponse>,
       callback?: BodyResponseCallback<Schema$ShippingsettingsListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ShippingsettingsListResponse>,
       callback?: BodyResponseCallback<Schema$ShippingsettingsListResponse>):
@@ -9437,14 +9460,14 @@ export class Resource$Shippingsettings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ShippingSettings>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ShippingSettings>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ShippingSettings>,
       callback?: BodyResponseCallback<Schema$ShippingSettings>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ShippingSettings>,
       callback?: BodyResponseCallback<Schema$ShippingSettings>):
       void|AxiosPromise<Schema$ShippingSettings> {
@@ -9495,14 +9518,14 @@ export class Resource$Shippingsettings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ShippingSettings>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ShippingSettings>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ShippingSettings>,
       callback?: BodyResponseCallback<Schema$ShippingSettings>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ShippingSettings>,
       callback?: BodyResponseCallback<Schema$ShippingSettings>):
       void|AxiosPromise<Schema$ShippingSettings> {
diff --git a/src/apis/content/v2sandbox.ts b/src/apis/content/v2sandbox.ts
index 1f7e095973..dbabfcfdc7 100644
--- a/src/apis/content/v2sandbox.ts
+++ b/src/apis/content/v2sandbox.ts
@@ -1788,15 +1788,15 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  acknowledge(params: any, options?: MethodOptions):
+  acknowledge(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersAcknowledgeResponse>;
   acknowledge(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersAcknowledgeResponse>,
       callback?: BodyResponseCallback<Schema$OrdersAcknowledgeResponse>): void;
   acknowledge(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersAcknowledgeResponse>,
       callback?: BodyResponseCallback<Schema$OrdersAcknowledgeResponse>):
@@ -1848,16 +1848,16 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  advancetestorder(params: any, options?: MethodOptions):
+  advancetestorder(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersAdvanceTestOrderResponse>;
   advancetestorder(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersAdvanceTestOrderResponse>,
       callback?: BodyResponseCallback<Schema$OrdersAdvanceTestOrderResponse>):
       void;
   advancetestorder(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersAdvanceTestOrderResponse>,
       callback?: BodyResponseCallback<Schema$OrdersAdvanceTestOrderResponse>):
@@ -1911,14 +1911,14 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancel(params: any, options?: MethodOptions):
+  cancel(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersCancelResponse>;
   cancel(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$OrdersCancelResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OrdersCancelResponse>,
       callback?: BodyResponseCallback<Schema$OrdersCancelResponse>): void;
   cancel(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$OrdersCancelResponse>,
       callback?: BodyResponseCallback<Schema$OrdersCancelResponse>):
       void|AxiosPromise<Schema$OrdersCancelResponse> {
@@ -1968,16 +1968,16 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancellineitem(params: any, options?: MethodOptions):
+  cancellineitem(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersCancelLineItemResponse>;
   cancellineitem(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersCancelLineItemResponse>,
       callback?: BodyResponseCallback<Schema$OrdersCancelLineItemResponse>):
       void;
   cancellineitem(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersCancelLineItemResponse>,
       callback?: BodyResponseCallback<Schema$OrdersCancelLineItemResponse>):
@@ -2029,16 +2029,16 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  createtestorder(params: any, options?: MethodOptions):
+  createtestorder(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersCreateTestOrderResponse>;
   createtestorder(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersCreateTestOrderResponse>,
       callback?: BodyResponseCallback<Schema$OrdersCreateTestOrderResponse>):
       void;
   createtestorder(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersCreateTestOrderResponse>,
       callback?: BodyResponseCallback<Schema$OrdersCreateTestOrderResponse>):
@@ -2087,15 +2087,15 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  custombatch(params: any, options?: MethodOptions):
+  custombatch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersCustomBatchResponse>;
   custombatch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersCustomBatchResponse>,
       callback?: BodyResponseCallback<Schema$OrdersCustomBatchResponse>): void;
   custombatch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersCustomBatchResponse>,
       callback?: BodyResponseCallback<Schema$OrdersCustomBatchResponse>):
@@ -2144,10 +2144,10 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Order>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Order>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Order>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Order>,
       callback?: BodyResponseCallback<Schema$Order>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Order>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Order>,
       callback?: BodyResponseCallback<Schema$Order>):
       void|AxiosPromise<Schema$Order> {
     if (typeof options === 'function') {
@@ -2194,17 +2194,17 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getbymerchantorderid(params: any, options?: MethodOptions):
+  getbymerchantorderid(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersGetByMerchantOrderIdResponse>;
   getbymerchantorderid(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersGetByMerchantOrderIdResponse>,
       callback?:
           BodyResponseCallback<Schema$OrdersGetByMerchantOrderIdResponse>):
       void;
   getbymerchantorderid(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersGetByMerchantOrderIdResponse>,
       callback?:
@@ -2259,17 +2259,17 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  gettestordertemplate(params: any, options?: MethodOptions):
+  gettestordertemplate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersGetTestOrderTemplateResponse>;
   gettestordertemplate(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersGetTestOrderTemplateResponse>,
       callback?:
           BodyResponseCallback<Schema$OrdersGetTestOrderTemplateResponse>):
       void;
   gettestordertemplate(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersGetTestOrderTemplateResponse>,
       callback?:
@@ -2324,17 +2324,17 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  instorerefundlineitem(params: any, options?: MethodOptions):
+  instorerefundlineitem(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersInStoreRefundLineItemResponse>;
   instorerefundlineitem(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersInStoreRefundLineItemResponse>,
       callback?:
           BodyResponseCallback<Schema$OrdersInStoreRefundLineItemResponse>):
       void;
   instorerefundlineitem(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersInStoreRefundLineItemResponse>,
       callback?:
@@ -2394,14 +2394,14 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$OrdersListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OrdersListResponse>,
       callback?: BodyResponseCallback<Schema$OrdersListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$OrdersListResponse>,
       callback?: BodyResponseCallback<Schema$OrdersListResponse>):
       void|AxiosPromise<Schema$OrdersListResponse> {
@@ -2450,14 +2450,14 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  refund(params: any, options?: MethodOptions):
+  refund(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersRefundResponse>;
   refund(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$OrdersRefundResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OrdersRefundResponse>,
       callback?: BodyResponseCallback<Schema$OrdersRefundResponse>): void;
   refund(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$OrdersRefundResponse>,
       callback?: BodyResponseCallback<Schema$OrdersRefundResponse>):
       void|AxiosPromise<Schema$OrdersRefundResponse> {
@@ -2507,17 +2507,17 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  rejectreturnlineitem(params: any, options?: MethodOptions):
+  rejectreturnlineitem(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersRejectReturnLineItemResponse>;
   rejectreturnlineitem(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersRejectReturnLineItemResponse>,
       callback?:
           BodyResponseCallback<Schema$OrdersRejectReturnLineItemResponse>):
       void;
   rejectreturnlineitem(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersRejectReturnLineItemResponse>,
       callback?:
@@ -2572,16 +2572,16 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  returnlineitem(params: any, options?: MethodOptions):
+  returnlineitem(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersReturnLineItemResponse>;
   returnlineitem(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersReturnLineItemResponse>,
       callback?: BodyResponseCallback<Schema$OrdersReturnLineItemResponse>):
       void;
   returnlineitem(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersReturnLineItemResponse>,
       callback?: BodyResponseCallback<Schema$OrdersReturnLineItemResponse>):
@@ -2635,17 +2635,17 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  returnrefundlineitem(params: any, options?: MethodOptions):
+  returnrefundlineitem(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersReturnRefundLineItemResponse>;
   returnrefundlineitem(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersReturnRefundLineItemResponse>,
       callback?:
           BodyResponseCallback<Schema$OrdersReturnRefundLineItemResponse>):
       void;
   returnrefundlineitem(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersReturnRefundLineItemResponse>,
       callback?:
@@ -2700,16 +2700,16 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setlineitemmetadata(params: any, options?: MethodOptions):
+  setlineitemmetadata(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersSetLineItemMetadataResponse>;
   setlineitemmetadata(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersSetLineItemMetadataResponse>,
       callback?:
           BodyResponseCallback<Schema$OrdersSetLineItemMetadataResponse>): void;
   setlineitemmetadata(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersSetLineItemMetadataResponse>,
       callback?:
@@ -2764,16 +2764,16 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  shiplineitems(params: any, options?: MethodOptions):
+  shiplineitems(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersShipLineItemsResponse>;
   shiplineitems(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersShipLineItemsResponse>,
       callback?: BodyResponseCallback<Schema$OrdersShipLineItemsResponse>):
       void;
   shiplineitems(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersShipLineItemsResponse>,
       callback?: BodyResponseCallback<Schema$OrdersShipLineItemsResponse>):
@@ -2826,16 +2826,16 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  updatelineitemshippingdetails(params: any, options?: MethodOptions):
+  updatelineitemshippingdetails(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersUpdateLineItemShippingDetailsResponse>;
   updatelineitemshippingdetails(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersUpdateLineItemShippingDetailsResponse>,
       callback?: BodyResponseCallback<
           Schema$OrdersUpdateLineItemShippingDetailsResponse>): void;
   updatelineitemshippingdetails(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersUpdateLineItemShippingDetailsResponse>,
       callback?: BodyResponseCallback<
@@ -2890,17 +2890,17 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  updatemerchantorderid(params: any, options?: MethodOptions):
+  updatemerchantorderid(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersUpdateMerchantOrderIdResponse>;
   updatemerchantorderid(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersUpdateMerchantOrderIdResponse>,
       callback?:
           BodyResponseCallback<Schema$OrdersUpdateMerchantOrderIdResponse>):
       void;
   updatemerchantorderid(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersUpdateMerchantOrderIdResponse>,
       callback?:
@@ -2955,16 +2955,16 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  updateshipment(params: any, options?: MethodOptions):
+  updateshipment(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersUpdateShipmentResponse>;
   updateshipment(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersUpdateShipmentResponse>,
       callback?: BodyResponseCallback<Schema$OrdersUpdateShipmentResponse>):
       void;
   updateshipment(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OrdersUpdateShipmentResponse>,
       callback?: BodyResponseCallback<Schema$OrdersUpdateShipmentResponse>):
diff --git a/src/apis/customsearch/v1.ts b/src/apis/customsearch/v1.ts
index deb332f09c..9005aa6975 100644
--- a/src/apis/customsearch/v1.ts
+++ b/src/apis/customsearch/v1.ts
@@ -198,12 +198,12 @@ export class Resource$Cse {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Search>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Search>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Search>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Search>,
       callback?: BodyResponseCallback<Schema$Search>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Search>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Search>,
       callback?: BodyResponseCallback<Schema$Search>):
       void|AxiosPromise<Schema$Search> {
     if (typeof options === 'function') {
@@ -291,12 +291,12 @@ export class Resource$Cse$Siterestrict {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Search>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Search>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Search>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Search>,
       callback?: BodyResponseCallback<Schema$Search>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Search>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Search>,
       callback?: BodyResponseCallback<Schema$Search>):
       void|AxiosPromise<Schema$Search> {
     if (typeof options === 'function') {
diff --git a/src/apis/dataflow/v1b3.ts b/src/apis/dataflow/v1b3.ts
index 7ab3970f12..96365c83e9 100644
--- a/src/apis/dataflow/v1b3.ts
+++ b/src/apis/dataflow/v1b3.ts
@@ -3236,15 +3236,15 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  workerMessages(params: any, options?: MethodOptions):
+  workerMessages(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SendWorkerMessagesResponse>;
   workerMessages(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SendWorkerMessagesResponse>,
       callback?: BodyResponseCallback<Schema$SendWorkerMessagesResponse>): void;
   workerMessages(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SendWorkerMessagesResponse>,
       callback?: BodyResponseCallback<Schema$SendWorkerMessagesResponse>):
@@ -3314,14 +3314,14 @@ export class Resource$Projects$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregated(params: any, options?: MethodOptions):
+  aggregated(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListJobsResponse>;
   aggregated(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListJobsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListJobsResponse>,
       callback?: BodyResponseCallback<Schema$ListJobsResponse>): void;
   aggregated(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListJobsResponse>,
       callback?: BodyResponseCallback<Schema$ListJobsResponse>):
       void|AxiosPromise<Schema$ListJobsResponse> {
@@ -3372,12 +3372,12 @@ export class Resource$Projects$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Job>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>):
       void|AxiosPromise<Schema$Job> {
     if (typeof options === 'function') {
@@ -3426,10 +3426,10 @@ export class Resource$Projects$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Job>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>):
       void|AxiosPromise<Schema$Job> {
     if (typeof options === 'function') {
@@ -3478,14 +3478,14 @@ export class Resource$Projects$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getMetrics(params: any, options?: MethodOptions):
+  getMetrics(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$JobMetrics>;
   getMetrics(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$JobMetrics>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$JobMetrics>,
       callback?: BodyResponseCallback<Schema$JobMetrics>): void;
   getMetrics(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$JobMetrics>,
       callback?: BodyResponseCallback<Schema$JobMetrics>):
       void|AxiosPromise<Schema$JobMetrics> {
@@ -3537,14 +3537,14 @@ export class Resource$Projects$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListJobsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListJobsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListJobsResponse>,
       callback?: BodyResponseCallback<Schema$ListJobsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListJobsResponse>,
       callback?: BodyResponseCallback<Schema$ListJobsResponse>):
       void|AxiosPromise<Schema$ListJobsResponse> {
@@ -3594,12 +3594,12 @@ export class Resource$Projects$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Job>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>):
       void|AxiosPromise<Schema$Job> {
     if (typeof options === 'function') {
@@ -3658,15 +3658,15 @@ export class Resource$Projects$Jobs$Debug {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getConfig(params: any, options?: MethodOptions):
+  getConfig(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GetDebugConfigResponse>;
   getConfig(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GetDebugConfigResponse>,
       callback?: BodyResponseCallback<Schema$GetDebugConfigResponse>): void;
   getConfig(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GetDebugConfigResponse>,
       callback?: BodyResponseCallback<Schema$GetDebugConfigResponse>):
@@ -3717,15 +3717,15 @@ export class Resource$Projects$Jobs$Debug {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  sendCapture(params: any, options?: MethodOptions):
+  sendCapture(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SendDebugCaptureResponse>;
   sendCapture(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SendDebugCaptureResponse>,
       callback?: BodyResponseCallback<Schema$SendDebugCaptureResponse>): void;
   sendCapture(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SendDebugCaptureResponse>,
       callback?: BodyResponseCallback<Schema$SendDebugCaptureResponse>):
@@ -3793,15 +3793,15 @@ export class Resource$Projects$Jobs$Messages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListJobMessagesResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListJobMessagesResponse>,
       callback?: BodyResponseCallback<Schema$ListJobMessagesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListJobMessagesResponse>,
       callback?: BodyResponseCallback<Schema$ListJobMessagesResponse>):
@@ -3863,14 +3863,15 @@ export class Resource$Projects$Jobs$Workitems {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  lease(params: any, options?: MethodOptions):
+  lease(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LeaseWorkItemResponse>;
   lease(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LeaseWorkItemResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$LeaseWorkItemResponse>,
       callback?: BodyResponseCallback<Schema$LeaseWorkItemResponse>): void;
   lease(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$LeaseWorkItemResponse>,
       callback?: BodyResponseCallback<Schema$LeaseWorkItemResponse>):
@@ -3921,16 +3922,16 @@ export class Resource$Projects$Jobs$Workitems {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  reportStatus(params: any, options?: MethodOptions):
+  reportStatus(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ReportWorkItemStatusResponse>;
   reportStatus(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ReportWorkItemStatusResponse>,
       callback?: BodyResponseCallback<Schema$ReportWorkItemStatusResponse>):
       void;
   reportStatus(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ReportWorkItemStatusResponse>,
       callback?: BodyResponseCallback<Schema$ReportWorkItemStatusResponse>):
@@ -4000,15 +4001,15 @@ export class Resource$Projects$Locations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  workerMessages(params: any, options?: MethodOptions):
+  workerMessages(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SendWorkerMessagesResponse>;
   workerMessages(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SendWorkerMessagesResponse>,
       callback?: BodyResponseCallback<Schema$SendWorkerMessagesResponse>): void;
   workerMessages(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SendWorkerMessagesResponse>,
       callback?: BodyResponseCallback<Schema$SendWorkerMessagesResponse>):
@@ -4079,12 +4080,12 @@ export class Resource$Projects$Locations$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Job>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>):
       void|AxiosPromise<Schema$Job> {
     if (typeof options === 'function') {
@@ -4134,10 +4135,10 @@ export class Resource$Projects$Locations$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Job>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>):
       void|AxiosPromise<Schema$Job> {
     if (typeof options === 'function') {
@@ -4188,14 +4189,14 @@ export class Resource$Projects$Locations$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getMetrics(params: any, options?: MethodOptions):
+  getMetrics(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$JobMetrics>;
   getMetrics(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$JobMetrics>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$JobMetrics>,
       callback?: BodyResponseCallback<Schema$JobMetrics>): void;
   getMetrics(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$JobMetrics>,
       callback?: BodyResponseCallback<Schema$JobMetrics>):
       void|AxiosPromise<Schema$JobMetrics> {
@@ -4249,14 +4250,14 @@ export class Resource$Projects$Locations$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListJobsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListJobsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListJobsResponse>,
       callback?: BodyResponseCallback<Schema$ListJobsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListJobsResponse>,
       callback?: BodyResponseCallback<Schema$ListJobsResponse>):
       void|AxiosPromise<Schema$ListJobsResponse> {
@@ -4307,12 +4308,12 @@ export class Resource$Projects$Locations$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Job>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>):
       void|AxiosPromise<Schema$Job> {
     if (typeof options === 'function') {
@@ -4374,15 +4375,15 @@ export class Resource$Projects$Locations$Jobs$Debug {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getConfig(params: any, options?: MethodOptions):
+  getConfig(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GetDebugConfigResponse>;
   getConfig(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GetDebugConfigResponse>,
       callback?: BodyResponseCallback<Schema$GetDebugConfigResponse>): void;
   getConfig(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GetDebugConfigResponse>,
       callback?: BodyResponseCallback<Schema$GetDebugConfigResponse>):
@@ -4435,15 +4436,15 @@ export class Resource$Projects$Locations$Jobs$Debug {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  sendCapture(params: any, options?: MethodOptions):
+  sendCapture(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SendDebugCaptureResponse>;
   sendCapture(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SendDebugCaptureResponse>,
       callback?: BodyResponseCallback<Schema$SendDebugCaptureResponse>): void;
   sendCapture(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SendDebugCaptureResponse>,
       callback?: BodyResponseCallback<Schema$SendDebugCaptureResponse>):
@@ -4512,15 +4513,15 @@ export class Resource$Projects$Locations$Jobs$Messages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListJobMessagesResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListJobMessagesResponse>,
       callback?: BodyResponseCallback<Schema$ListJobMessagesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListJobMessagesResponse>,
       callback?: BodyResponseCallback<Schema$ListJobMessagesResponse>):
@@ -4585,14 +4586,15 @@ export class Resource$Projects$Locations$Jobs$Workitems {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  lease(params: any, options?: MethodOptions):
+  lease(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LeaseWorkItemResponse>;
   lease(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LeaseWorkItemResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$LeaseWorkItemResponse>,
       callback?: BodyResponseCallback<Schema$LeaseWorkItemResponse>): void;
   lease(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$LeaseWorkItemResponse>,
       callback?: BodyResponseCallback<Schema$LeaseWorkItemResponse>):
@@ -4645,16 +4647,16 @@ export class Resource$Projects$Locations$Jobs$Workitems {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  reportStatus(params: any, options?: MethodOptions):
+  reportStatus(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ReportWorkItemStatusResponse>;
   reportStatus(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ReportWorkItemStatusResponse>,
       callback?: BodyResponseCallback<Schema$ReportWorkItemStatusResponse>):
       void;
   reportStatus(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ReportWorkItemStatusResponse>,
       callback?: BodyResponseCallback<Schema$ReportWorkItemStatusResponse>):
@@ -4720,12 +4722,12 @@ export class Resource$Projects$Locations$Templates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Job>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>):
       void|AxiosPromise<Schema$Job> {
     if (typeof options === 'function') {
@@ -4775,12 +4777,12 @@ export class Resource$Projects$Locations$Templates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$GetTemplateResponse>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GetTemplateResponse>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GetTemplateResponse>,
       callback?: BodyResponseCallback<Schema$GetTemplateResponse>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GetTemplateResponse>,
       callback?: BodyResponseCallback<Schema$GetTemplateResponse>):
       void|AxiosPromise<Schema$GetTemplateResponse> {
@@ -4833,15 +4835,15 @@ export class Resource$Projects$Locations$Templates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  launch(params: any, options?: MethodOptions):
+  launch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LaunchTemplateResponse>;
   launch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$LaunchTemplateResponse>,
       callback?: BodyResponseCallback<Schema$LaunchTemplateResponse>): void;
   launch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$LaunchTemplateResponse>,
       callback?: BodyResponseCallback<Schema$LaunchTemplateResponse>):
@@ -4905,12 +4907,12 @@ export class Resource$Projects$Templates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Job>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>):
       void|AxiosPromise<Schema$Job> {
     if (typeof options === 'function') {
@@ -4959,12 +4961,12 @@ export class Resource$Projects$Templates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$GetTemplateResponse>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GetTemplateResponse>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GetTemplateResponse>,
       callback?: BodyResponseCallback<Schema$GetTemplateResponse>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GetTemplateResponse>,
       callback?: BodyResponseCallback<Schema$GetTemplateResponse>):
       void|AxiosPromise<Schema$GetTemplateResponse> {
@@ -5015,15 +5017,15 @@ export class Resource$Projects$Templates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  launch(params: any, options?: MethodOptions):
+  launch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LaunchTemplateResponse>;
   launch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$LaunchTemplateResponse>,
       callback?: BodyResponseCallback<Schema$LaunchTemplateResponse>): void;
   launch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$LaunchTemplateResponse>,
       callback?: BodyResponseCallback<Schema$LaunchTemplateResponse>):
diff --git a/src/apis/dataproc/v1.ts b/src/apis/dataproc/v1.ts
index ed8eb31680..514a81e14c 100644
--- a/src/apis/dataproc/v1.ts
+++ b/src/apis/dataproc/v1.ts
@@ -1226,13 +1226,13 @@ export class Resource$Projects$Regions$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1341,13 +1341,13 @@ export class Resource$Projects$Regions$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1461,14 +1461,14 @@ export class Resource$Projects$Regions$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  diagnose(params: any, options?: MethodOptions):
+  diagnose(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   diagnose(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   diagnose(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1578,10 +1578,12 @@ export class Resource$Projects$Regions$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Cluster>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Cluster>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Cluster>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Cluster>,
       callback?: BodyResponseCallback<Schema$Cluster>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Cluster>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Cluster>,
       callback?: BodyResponseCallback<Schema$Cluster>):
       void|AxiosPromise<Schema$Cluster> {
     if (typeof options === 'function') {
@@ -1702,14 +1704,14 @@ export class Resource$Projects$Regions$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListClustersResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListClustersResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListClustersResponse>,
       callback?: BodyResponseCallback<Schema$ListClustersResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListClustersResponse>,
       callback?: BodyResponseCallback<Schema$ListClustersResponse>):
       void|AxiosPromise<Schema$ListClustersResponse> {
@@ -1825,13 +1827,13 @@ export class Resource$Projects$Regions$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1958,12 +1960,12 @@ export class Resource$Projects$Regions$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancel(params: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
+  cancel(params?: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
   cancel(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Job>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>): void;
   cancel(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>):
       void|AxiosPromise<Schema$Job> {
     if (typeof options === 'function') {
@@ -2069,12 +2071,12 @@ export class Resource$Projects$Regions$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2181,10 +2183,10 @@ export class Resource$Projects$Regions$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Job>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>):
       void|AxiosPromise<Schema$Job> {
     if (typeof options === 'function') {
@@ -2305,14 +2307,14 @@ export class Resource$Projects$Regions$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListJobsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListJobsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListJobsResponse>,
       callback?: BodyResponseCallback<Schema$ListJobsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListJobsResponse>,
       callback?: BodyResponseCallback<Schema$ListJobsResponse>):
       void|AxiosPromise<Schema$ListJobsResponse> {
@@ -2427,12 +2429,12 @@ export class Resource$Projects$Regions$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Job>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>):
       void|AxiosPromise<Schema$Job> {
     if (typeof options === 'function') {
@@ -2540,12 +2542,12 @@ export class Resource$Projects$Regions$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  submit(params: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
+  submit(params?: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
   submit(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Job>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>): void;
   submit(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>):
       void|AxiosPromise<Schema$Job> {
     if (typeof options === 'function') {
@@ -2662,12 +2664,12 @@ export class Resource$Projects$Regions$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancel(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  cancel(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   cancel(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   cancel(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2765,12 +2767,12 @@ export class Resource$Projects$Regions$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2868,11 +2870,11 @@ export class Resource$Projects$Regions$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2995,15 +2997,15 @@ export class Resource$Projects$Regions$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListOperationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>):
diff --git a/src/apis/dataproc/v1beta2.ts b/src/apis/dataproc/v1beta2.ts
index 5b2cb0cd58..6601417e0f 100644
--- a/src/apis/dataproc/v1beta2.ts
+++ b/src/apis/dataproc/v1beta2.ts
@@ -1587,14 +1587,14 @@ export class Resource$Projects$Locations$Workflowtemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$WorkflowTemplate>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$WorkflowTemplate>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$WorkflowTemplate>,
       callback?: BodyResponseCallback<Schema$WorkflowTemplate>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$WorkflowTemplate>,
       callback?: BodyResponseCallback<Schema$WorkflowTemplate>):
       void|AxiosPromise<Schema$WorkflowTemplate> {
@@ -1643,12 +1643,12 @@ export class Resource$Projects$Locations$Workflowtemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1695,12 +1695,12 @@ export class Resource$Projects$Locations$Workflowtemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$WorkflowTemplate>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$WorkflowTemplate>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$WorkflowTemplate>,
       callback?: BodyResponseCallback<Schema$WorkflowTemplate>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$WorkflowTemplate>,
       callback?: BodyResponseCallback<Schema$WorkflowTemplate>):
       void|AxiosPromise<Schema$WorkflowTemplate> {
@@ -1747,13 +1747,13 @@ export class Resource$Projects$Locations$Workflowtemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -1806,14 +1806,14 @@ export class Resource$Projects$Locations$Workflowtemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  instantiate(params: any, options?: MethodOptions):
+  instantiate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   instantiate(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   instantiate(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1870,14 +1870,14 @@ export class Resource$Projects$Locations$Workflowtemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  instantiateInline(params: any, options?: MethodOptions):
+  instantiateInline(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   instantiateInline(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   instantiateInline(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1927,16 +1927,16 @@ export class Resource$Projects$Locations$Workflowtemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListWorkflowTemplatesResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListWorkflowTemplatesResponse>,
       callback?: BodyResponseCallback<Schema$ListWorkflowTemplatesResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListWorkflowTemplatesResponse>,
       callback?: BodyResponseCallback<Schema$ListWorkflowTemplatesResponse>):
@@ -1987,13 +1987,13 @@ export class Resource$Projects$Locations$Workflowtemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -2044,15 +2044,15 @@ export class Resource$Projects$Locations$Workflowtemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestIamPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>):
@@ -2102,14 +2102,14 @@ export class Resource$Projects$Locations$Workflowtemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$WorkflowTemplate>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$WorkflowTemplate>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$WorkflowTemplate>,
       callback?: BodyResponseCallback<Schema$WorkflowTemplate>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$WorkflowTemplate>,
       callback?: BodyResponseCallback<Schema$WorkflowTemplate>):
       void|AxiosPromise<Schema$WorkflowTemplate> {
@@ -2191,13 +2191,13 @@ export class Resource$Projects$Regions$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2249,13 +2249,13 @@ export class Resource$Projects$Regions$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2308,14 +2308,14 @@ export class Resource$Projects$Regions$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  diagnose(params: any, options?: MethodOptions):
+  diagnose(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   diagnose(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   diagnose(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2366,10 +2366,12 @@ export class Resource$Projects$Regions$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Cluster>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Cluster>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Cluster>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Cluster>,
       callback?: BodyResponseCallback<Schema$Cluster>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Cluster>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Cluster>,
       callback?: BodyResponseCallback<Schema$Cluster>):
       void|AxiosPromise<Schema$Cluster> {
     if (typeof options === 'function') {
@@ -2418,13 +2420,13 @@ export class Resource$Projects$Regions$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -2474,14 +2476,14 @@ export class Resource$Projects$Regions$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListClustersResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListClustersResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListClustersResponse>,
       callback?: BodyResponseCallback<Schema$ListClustersResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListClustersResponse>,
       callback?: BodyResponseCallback<Schema$ListClustersResponse>):
       void|AxiosPromise<Schema$ListClustersResponse> {
@@ -2535,13 +2537,13 @@ export class Resource$Projects$Regions$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2592,13 +2594,13 @@ export class Resource$Projects$Regions$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -2649,15 +2651,15 @@ export class Resource$Projects$Regions$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestIamPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>):
@@ -2721,12 +2723,12 @@ export class Resource$Projects$Regions$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancel(params: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
+  cancel(params?: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
   cancel(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Job>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>): void;
   cancel(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>):
       void|AxiosPromise<Schema$Job> {
     if (typeof options === 'function') {
@@ -2777,12 +2779,12 @@ export class Resource$Projects$Regions$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2831,10 +2833,10 @@ export class Resource$Projects$Regions$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Job>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>):
       void|AxiosPromise<Schema$Job> {
     if (typeof options === 'function') {
@@ -2882,13 +2884,13 @@ export class Resource$Projects$Regions$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -2940,14 +2942,14 @@ export class Resource$Projects$Regions$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListJobsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListJobsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListJobsResponse>,
       callback?: BodyResponseCallback<Schema$ListJobsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListJobsResponse>,
       callback?: BodyResponseCallback<Schema$ListJobsResponse>):
       void|AxiosPromise<Schema$ListJobsResponse> {
@@ -2999,12 +3001,12 @@ export class Resource$Projects$Regions$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Job>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>):
       void|AxiosPromise<Schema$Job> {
     if (typeof options === 'function') {
@@ -3053,13 +3055,13 @@ export class Resource$Projects$Regions$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -3107,12 +3109,12 @@ export class Resource$Projects$Regions$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  submit(params: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
+  submit(params?: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
   submit(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Job>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>): void;
   submit(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>):
       void|AxiosPromise<Schema$Job> {
     if (typeof options === 'function') {
@@ -3164,15 +3166,15 @@ export class Resource$Projects$Regions$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestIamPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>):
@@ -3240,12 +3242,12 @@ export class Resource$Projects$Regions$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancel(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  cancel(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   cancel(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   cancel(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -3294,12 +3296,12 @@ export class Resource$Projects$Regions$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -3346,11 +3348,11 @@ export class Resource$Projects$Regions$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3397,13 +3399,13 @@ export class Resource$Projects$Regions$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -3460,15 +3462,15 @@ export class Resource$Projects$Regions$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListOperationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>):
@@ -3517,13 +3519,13 @@ export class Resource$Projects$Regions$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -3574,15 +3576,15 @@ export class Resource$Projects$Regions$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestIamPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>):
@@ -3643,14 +3645,14 @@ export class Resource$Projects$Regions$Workflowtemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$WorkflowTemplate>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$WorkflowTemplate>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$WorkflowTemplate>,
       callback?: BodyResponseCallback<Schema$WorkflowTemplate>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$WorkflowTemplate>,
       callback?: BodyResponseCallback<Schema$WorkflowTemplate>):
       void|AxiosPromise<Schema$WorkflowTemplate> {
@@ -3699,12 +3701,12 @@ export class Resource$Projects$Regions$Workflowtemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -3751,12 +3753,12 @@ export class Resource$Projects$Regions$Workflowtemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$WorkflowTemplate>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$WorkflowTemplate>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$WorkflowTemplate>,
       callback?: BodyResponseCallback<Schema$WorkflowTemplate>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$WorkflowTemplate>,
       callback?: BodyResponseCallback<Schema$WorkflowTemplate>):
       void|AxiosPromise<Schema$WorkflowTemplate> {
@@ -3803,13 +3805,13 @@ export class Resource$Projects$Regions$Workflowtemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -3862,14 +3864,14 @@ export class Resource$Projects$Regions$Workflowtemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  instantiate(params: any, options?: MethodOptions):
+  instantiate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   instantiate(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   instantiate(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3926,14 +3928,14 @@ export class Resource$Projects$Regions$Workflowtemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  instantiateInline(params: any, options?: MethodOptions):
+  instantiateInline(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   instantiateInline(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   instantiateInline(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3983,16 +3985,16 @@ export class Resource$Projects$Regions$Workflowtemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListWorkflowTemplatesResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListWorkflowTemplatesResponse>,
       callback?: BodyResponseCallback<Schema$ListWorkflowTemplatesResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListWorkflowTemplatesResponse>,
       callback?: BodyResponseCallback<Schema$ListWorkflowTemplatesResponse>):
@@ -4043,13 +4045,13 @@ export class Resource$Projects$Regions$Workflowtemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -4100,15 +4102,15 @@ export class Resource$Projects$Regions$Workflowtemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestIamPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>):
@@ -4158,14 +4160,14 @@ export class Resource$Projects$Regions$Workflowtemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$WorkflowTemplate>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$WorkflowTemplate>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$WorkflowTemplate>,
       callback?: BodyResponseCallback<Schema$WorkflowTemplate>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$WorkflowTemplate>,
       callback?: BodyResponseCallback<Schema$WorkflowTemplate>):
       void|AxiosPromise<Schema$WorkflowTemplate> {
diff --git a/src/apis/datastore/v1.ts b/src/apis/datastore/v1.ts
index f2eae199ee..2c5cc0ead7 100644
--- a/src/apis/datastore/v1.ts
+++ b/src/apis/datastore/v1.ts
@@ -1242,14 +1242,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  allocateIds(params: any, options?: MethodOptions):
+  allocateIds(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AllocateIdsResponse>;
   allocateIds(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AllocateIdsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AllocateIdsResponse>,
       callback?: BodyResponseCallback<Schema$AllocateIdsResponse>): void;
   allocateIds(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AllocateIdsResponse>,
       callback?: BodyResponseCallback<Schema$AllocateIdsResponse>):
       void|AxiosPromise<Schema$AllocateIdsResponse> {
@@ -1297,15 +1297,15 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  beginTransaction(params: any, options?: MethodOptions):
+  beginTransaction(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BeginTransactionResponse>;
   beginTransaction(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$BeginTransactionResponse>,
       callback?: BodyResponseCallback<Schema$BeginTransactionResponse>): void;
   beginTransaction(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$BeginTransactionResponse>,
       callback?: BodyResponseCallback<Schema$BeginTransactionResponse>):
@@ -1355,14 +1355,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  commit(params: any, options?: MethodOptions):
+  commit(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CommitResponse>;
   commit(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CommitResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CommitResponse>,
       callback?: BodyResponseCallback<Schema$CommitResponse>): void;
   commit(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CommitResponse>,
       callback?: BodyResponseCallback<Schema$CommitResponse>):
       void|AxiosPromise<Schema$CommitResponse> {
@@ -1417,15 +1417,15 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  export(params: any, options?: MethodOptions):
+  export(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleLongrunningOperation>;
   export(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
   export(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>):
@@ -1478,9 +1478,9 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-import(params: any, options?: MethodOptions): AxiosPromise<Schema$GoogleLongrunningOperation>;
-import(params: any, options: MethodOptions|BodyResponseCallback<Schema$GoogleLongrunningOperation>, callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
-import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$GoogleLongrunningOperation>, callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void|AxiosPromise<Schema$GoogleLongrunningOperation> {if(typeof options === 'function') {
+import(params?: any, options?: MethodOptions): AxiosPromise<Schema$GoogleLongrunningOperation>;
+import(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$GoogleLongrunningOperation>, callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
+import(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$GoogleLongrunningOperation>, callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void|AxiosPromise<Schema$GoogleLongrunningOperation> {if(typeof options === 'function') {
     callback = options;
     options = {};
   } if(typeof params === 'function') {
@@ -1506,13 +1506,13 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$GoogleLo
  * @param {callback} callback The callback that handles the response.
  * @return {object} Request object
  */
-  lookup(params: any, options?: MethodOptions): AxiosPromise<Schema$LookupResponse>;
+  lookup(params?: any, options?: MethodOptions): AxiosPromise<Schema$LookupResponse>;
   lookup(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LookupResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LookupResponse>,
       callback?: BodyResponseCallback<Schema$LookupResponse>): void;
   lookup(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LookupResponse>,
       callback?: BodyResponseCallback<Schema$LookupResponse>):
       void|AxiosPromise<Schema$LookupResponse> {
@@ -1561,14 +1561,14 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$GoogleLo
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  reserveIds(params: any, options?: MethodOptions):
+  reserveIds(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ReserveIdsResponse>;
   reserveIds(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ReserveIdsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ReserveIdsResponse>,
       callback?: BodyResponseCallback<Schema$ReserveIdsResponse>): void;
   reserveIds(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ReserveIdsResponse>,
       callback?: BodyResponseCallback<Schema$ReserveIdsResponse>):
       void|AxiosPromise<Schema$ReserveIdsResponse> {
@@ -1616,14 +1616,14 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$GoogleLo
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  rollback(params: any, options?: MethodOptions):
+  rollback(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RollbackResponse>;
   rollback(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RollbackResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RollbackResponse>,
       callback?: BodyResponseCallback<Schema$RollbackResponse>): void;
   rollback(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RollbackResponse>,
       callback?: BodyResponseCallback<Schema$RollbackResponse>):
       void|AxiosPromise<Schema$RollbackResponse> {
@@ -1671,14 +1671,14 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$GoogleLo
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  runQuery(params: any, options?: MethodOptions):
+  runQuery(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RunQueryResponse>;
   runQuery(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RunQueryResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RunQueryResponse>,
       callback?: BodyResponseCallback<Schema$RunQueryResponse>): void;
   runQuery(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RunQueryResponse>,
       callback?: BodyResponseCallback<Schema$RunQueryResponse>):
       void|AxiosPromise<Schema$RunQueryResponse> {
@@ -1744,12 +1744,12 @@ export class Resource$Projects$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancel(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  cancel(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   cancel(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   cancel(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1797,12 +1797,12 @@ export class Resource$Projects$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1849,13 +1849,13 @@ export class Resource$Projects$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$GoogleLongrunningOperation>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>):
@@ -1913,17 +1913,17 @@ export class Resource$Projects$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleLongrunningListOperationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningListOperationsResponse>,
       callback?:
           BodyResponseCallback<Schema$GoogleLongrunningListOperationsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningListOperationsResponse>,
       callback?:
diff --git a/src/apis/datastore/v1beta1.ts b/src/apis/datastore/v1beta1.ts
index 95d3a241f0..3bb73bf012 100644
--- a/src/apis/datastore/v1beta1.ts
+++ b/src/apis/datastore/v1beta1.ts
@@ -519,15 +519,15 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  export(params: any, options?: MethodOptions):
+  export(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleLongrunningOperation>;
   export(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
   export(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>):
@@ -580,9 +580,9 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-import(params: any, options?: MethodOptions): AxiosPromise<Schema$GoogleLongrunningOperation>;
-import(params: any, options: MethodOptions|BodyResponseCallback<Schema$GoogleLongrunningOperation>, callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
-import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$GoogleLongrunningOperation>, callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void|AxiosPromise<Schema$GoogleLongrunningOperation> {
+import(params?: any, options?: MethodOptions): AxiosPromise<Schema$GoogleLongrunningOperation>;
+import(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$GoogleLongrunningOperation>, callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
+import(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$GoogleLongrunningOperation>, callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void|AxiosPromise<Schema$GoogleLongrunningOperation> {
   if (typeof options === 'function') {
     callback = options;
     options = {};
diff --git a/src/apis/datastore/v1beta3.ts b/src/apis/datastore/v1beta3.ts
index 658841c9c3..a4f303f83a 100644
--- a/src/apis/datastore/v1beta3.ts
+++ b/src/apis/datastore/v1beta3.ts
@@ -1068,14 +1068,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  allocateIds(params: any, options?: MethodOptions):
+  allocateIds(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AllocateIdsResponse>;
   allocateIds(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AllocateIdsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AllocateIdsResponse>,
       callback?: BodyResponseCallback<Schema$AllocateIdsResponse>): void;
   allocateIds(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AllocateIdsResponse>,
       callback?: BodyResponseCallback<Schema$AllocateIdsResponse>):
       void|AxiosPromise<Schema$AllocateIdsResponse> {
@@ -1123,15 +1123,15 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  beginTransaction(params: any, options?: MethodOptions):
+  beginTransaction(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BeginTransactionResponse>;
   beginTransaction(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$BeginTransactionResponse>,
       callback?: BodyResponseCallback<Schema$BeginTransactionResponse>): void;
   beginTransaction(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$BeginTransactionResponse>,
       callback?: BodyResponseCallback<Schema$BeginTransactionResponse>):
@@ -1181,14 +1181,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  commit(params: any, options?: MethodOptions):
+  commit(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CommitResponse>;
   commit(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CommitResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CommitResponse>,
       callback?: BodyResponseCallback<Schema$CommitResponse>): void;
   commit(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CommitResponse>,
       callback?: BodyResponseCallback<Schema$CommitResponse>):
       void|AxiosPromise<Schema$CommitResponse> {
@@ -1236,14 +1236,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  lookup(params: any, options?: MethodOptions):
+  lookup(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LookupResponse>;
   lookup(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LookupResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LookupResponse>,
       callback?: BodyResponseCallback<Schema$LookupResponse>): void;
   lookup(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LookupResponse>,
       callback?: BodyResponseCallback<Schema$LookupResponse>):
       void|AxiosPromise<Schema$LookupResponse> {
@@ -1292,14 +1292,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  reserveIds(params: any, options?: MethodOptions):
+  reserveIds(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ReserveIdsResponse>;
   reserveIds(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ReserveIdsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ReserveIdsResponse>,
       callback?: BodyResponseCallback<Schema$ReserveIdsResponse>): void;
   reserveIds(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ReserveIdsResponse>,
       callback?: BodyResponseCallback<Schema$ReserveIdsResponse>):
       void|AxiosPromise<Schema$ReserveIdsResponse> {
@@ -1347,14 +1347,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  rollback(params: any, options?: MethodOptions):
+  rollback(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RollbackResponse>;
   rollback(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RollbackResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RollbackResponse>,
       callback?: BodyResponseCallback<Schema$RollbackResponse>): void;
   rollback(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RollbackResponse>,
       callback?: BodyResponseCallback<Schema$RollbackResponse>):
       void|AxiosPromise<Schema$RollbackResponse> {
@@ -1402,14 +1402,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  runQuery(params: any, options?: MethodOptions):
+  runQuery(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RunQueryResponse>;
   runQuery(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RunQueryResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RunQueryResponse>,
       callback?: BodyResponseCallback<Schema$RunQueryResponse>): void;
   runQuery(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RunQueryResponse>,
       callback?: BodyResponseCallback<Schema$RunQueryResponse>):
       void|AxiosPromise<Schema$RunQueryResponse> {
diff --git a/src/apis/deploymentmanager/alpha.ts b/src/apis/deploymentmanager/alpha.ts
index 73d5fdb800..3306d2dee3 100644
--- a/src/apis/deploymentmanager/alpha.ts
+++ b/src/apis/deploymentmanager/alpha.ts
@@ -1455,13 +1455,13 @@ export class Resource$Compositetypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1511,11 +1511,12 @@ export class Resource$Compositetypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$CompositeType>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CompositeType>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$CompositeType>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CompositeType>,
       callback?: BodyResponseCallback<Schema$CompositeType>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CompositeType>,
       callback?: BodyResponseCallback<Schema$CompositeType>):
       void|AxiosPromise<Schema$CompositeType> {
@@ -1565,13 +1566,13 @@ export class Resource$Compositetypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1624,15 +1625,15 @@ export class Resource$Compositetypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CompositeTypesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$CompositeTypesListResponse>,
       callback?: BodyResponseCallback<Schema$CompositeTypesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$CompositeTypesListResponse>,
       callback?: BodyResponseCallback<Schema$CompositeTypesListResponse>):
@@ -1684,13 +1685,13 @@ export class Resource$Compositetypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1741,13 +1742,13 @@ export class Resource$Compositetypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1811,14 +1812,14 @@ export class Resource$Deployments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancelPreview(params: any, options?: MethodOptions):
+  cancelPreview(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   cancelPreview(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   cancelPreview(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1869,13 +1870,13 @@ export class Resource$Deployments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1925,11 +1926,11 @@ export class Resource$Deployments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Deployment>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Deployment>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Deployment>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Deployment>,
       callback?: BodyResponseCallback<Schema$Deployment>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Deployment>,
       callback?: BodyResponseCallback<Schema$Deployment>):
       void|AxiosPromise<Schema$Deployment> {
@@ -1980,13 +1981,13 @@ export class Resource$Deployments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -2038,13 +2039,13 @@ export class Resource$Deployments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2097,15 +2098,15 @@ export class Resource$Deployments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DeploymentsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$DeploymentsListResponse>,
       callback?: BodyResponseCallback<Schema$DeploymentsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$DeploymentsListResponse>,
       callback?: BodyResponseCallback<Schema$DeploymentsListResponse>):
@@ -2161,13 +2162,13 @@ export class Resource$Deployments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2219,13 +2220,13 @@ export class Resource$Deployments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -2276,13 +2277,13 @@ export class Resource$Deployments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  stop(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  stop(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   stop(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   stop(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2333,15 +2334,15 @@ export class Resource$Deployments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -2397,13 +2398,13 @@ export class Resource$Deployments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2466,10 +2467,11 @@ export class Resource$Manifests {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Manifest>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Manifest>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Manifest>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Manifest>,
       callback?: BodyResponseCallback<Schema$Manifest>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Manifest>,
       callback?: BodyResponseCallback<Schema$Manifest>):
       void|AxiosPromise<Schema$Manifest> {
@@ -2523,14 +2525,15 @@ export class Resource$Manifests {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ManifestsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ManifestsListResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ManifestsListResponse>,
       callback?: BodyResponseCallback<Schema$ManifestsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ManifestsListResponse>,
       callback?: BodyResponseCallback<Schema$ManifestsListResponse>):
@@ -2593,11 +2596,11 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2650,15 +2653,15 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OperationsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OperationsListResponse>,
       callback?: BodyResponseCallback<Schema$OperationsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OperationsListResponse>,
       callback?: BodyResponseCallback<Schema$OperationsListResponse>):
@@ -2722,10 +2725,11 @@ export class Resource$Resources {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Resource>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Resource>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Resource>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Resource>,
       callback?: BodyResponseCallback<Schema$Resource>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Resource>,
       callback?: BodyResponseCallback<Schema$Resource>):
       void|AxiosPromise<Schema$Resource> {
@@ -2779,14 +2783,15 @@ export class Resource$Resources {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ResourcesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ResourcesListResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ResourcesListResponse>,
       callback?: BodyResponseCallback<Schema$ResourcesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ResourcesListResponse>,
       callback?: BodyResponseCallback<Schema$ResourcesListResponse>):
@@ -2849,13 +2854,13 @@ export class Resource$Typeproviders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2905,11 +2910,11 @@ export class Resource$Typeproviders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$TypeProvider>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TypeProvider>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$TypeProvider>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TypeProvider>,
       callback?: BodyResponseCallback<Schema$TypeProvider>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TypeProvider>,
       callback?: BodyResponseCallback<Schema$TypeProvider>):
       void|AxiosPromise<Schema$TypeProvider> {
@@ -2960,12 +2965,13 @@ export class Resource$Typeproviders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getType(params: any, options?: MethodOptions): AxiosPromise<Schema$TypeInfo>;
+  getType(params?: any, options?: MethodOptions): AxiosPromise<Schema$TypeInfo>;
   getType(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$TypeInfo>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TypeInfo>,
       callback?: BodyResponseCallback<Schema$TypeInfo>): void;
   getType(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TypeInfo>,
       callback?: BodyResponseCallback<Schema$TypeInfo>):
       void|AxiosPromise<Schema$TypeInfo> {
@@ -3015,13 +3021,13 @@ export class Resource$Typeproviders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3074,15 +3080,15 @@ export class Resource$Typeproviders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TypeProvidersListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TypeProvidersListResponse>,
       callback?: BodyResponseCallback<Schema$TypeProvidersListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TypeProvidersListResponse>,
       callback?: BodyResponseCallback<Schema$TypeProvidersListResponse>):
@@ -3137,16 +3143,16 @@ export class Resource$Typeproviders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listTypes(params: any, options?: MethodOptions):
+  listTypes(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TypeProvidersListTypesResponse>;
   listTypes(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TypeProvidersListTypesResponse>,
       callback?: BodyResponseCallback<Schema$TypeProvidersListTypesResponse>):
       void;
   listTypes(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TypeProvidersListTypesResponse>,
       callback?: BodyResponseCallback<Schema$TypeProvidersListTypesResponse>):
@@ -3200,13 +3206,13 @@ export class Resource$Typeproviders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3257,13 +3263,13 @@ export class Resource$Typeproviders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3325,13 +3331,13 @@ export class Resource$Types {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3381,10 +3387,10 @@ export class Resource$Types {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Type>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Type>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Type>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Type>,
       callback?: BodyResponseCallback<Schema$Type>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Type>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Type>,
       callback?: BodyResponseCallback<Schema$Type>):
       void|AxiosPromise<Schema$Type> {
     if (typeof options === 'function') {
@@ -3433,13 +3439,13 @@ export class Resource$Types {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3491,14 +3497,14 @@ export class Resource$Types {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TypesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TypesListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TypesListResponse>,
       callback?: BodyResponseCallback<Schema$TypesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TypesListResponse>,
       callback?: BodyResponseCallback<Schema$TypesListResponse>):
       void|AxiosPromise<Schema$TypesListResponse> {
@@ -3548,13 +3554,13 @@ export class Resource$Types {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3605,13 +3611,13 @@ export class Resource$Types {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
diff --git a/src/apis/deploymentmanager/v2.ts b/src/apis/deploymentmanager/v2.ts
index c57cf6ca37..5b63f83ced 100644
--- a/src/apis/deploymentmanager/v2.ts
+++ b/src/apis/deploymentmanager/v2.ts
@@ -1007,14 +1007,14 @@ export class Resource$Deployments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancelPreview(params: any, options?: MethodOptions):
+  cancelPreview(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   cancelPreview(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   cancelPreview(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1120,13 +1120,13 @@ export class Resource$Deployments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1231,11 +1231,11 @@ export class Resource$Deployments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Deployment>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Deployment>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Deployment>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Deployment>,
       callback?: BodyResponseCallback<Schema$Deployment>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Deployment>,
       callback?: BodyResponseCallback<Schema$Deployment>):
       void|AxiosPromise<Schema$Deployment> {
@@ -1339,13 +1339,13 @@ export class Resource$Deployments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -1453,13 +1453,13 @@ export class Resource$Deployments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1577,15 +1577,15 @@ export class Resource$Deployments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DeploymentsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$DeploymentsListResponse>,
       callback?: BodyResponseCallback<Schema$DeploymentsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$DeploymentsListResponse>,
       callback?: BodyResponseCallback<Schema$DeploymentsListResponse>):
@@ -1701,13 +1701,13 @@ export class Resource$Deployments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1816,13 +1816,13 @@ export class Resource$Deployments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -1932,13 +1932,13 @@ export class Resource$Deployments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  stop(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  stop(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   stop(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   stop(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2046,15 +2046,15 @@ export class Resource$Deployments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -2171,13 +2171,13 @@ export class Resource$Deployments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2298,10 +2298,11 @@ export class Resource$Manifests {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Manifest>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Manifest>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Manifest>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Manifest>,
       callback?: BodyResponseCallback<Schema$Manifest>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Manifest>,
       callback?: BodyResponseCallback<Schema$Manifest>):
       void|AxiosPromise<Schema$Manifest> {
@@ -2423,14 +2424,15 @@ export class Resource$Manifests {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ManifestsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ManifestsListResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ManifestsListResponse>,
       callback?: BodyResponseCallback<Schema$ManifestsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ManifestsListResponse>,
       callback?: BodyResponseCallback<Schema$ManifestsListResponse>):
@@ -2548,11 +2550,11 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2670,15 +2672,15 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OperationsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OperationsListResponse>,
       callback?: BodyResponseCallback<Schema$OperationsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OperationsListResponse>,
       callback?: BodyResponseCallback<Schema$OperationsListResponse>):
@@ -2799,10 +2801,11 @@ export class Resource$Resources {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Resource>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Resource>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Resource>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Resource>,
       callback?: BodyResponseCallback<Schema$Resource>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Resource>,
       callback?: BodyResponseCallback<Schema$Resource>):
       void|AxiosPromise<Schema$Resource> {
@@ -2924,14 +2927,15 @@ export class Resource$Resources {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ResourcesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ResourcesListResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ResourcesListResponse>,
       callback?: BodyResponseCallback<Schema$ResourcesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ResourcesListResponse>,
       callback?: BodyResponseCallback<Schema$ResourcesListResponse>):
@@ -3062,14 +3066,14 @@ export class Resource$Types {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TypesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TypesListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TypesListResponse>,
       callback?: BodyResponseCallback<Schema$TypesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TypesListResponse>,
       callback?: BodyResponseCallback<Schema$TypesListResponse>):
       void|AxiosPromise<Schema$TypesListResponse> {
diff --git a/src/apis/deploymentmanager/v2beta.ts b/src/apis/deploymentmanager/v2beta.ts
index 5d0d75834c..938f335e7a 100644
--- a/src/apis/deploymentmanager/v2beta.ts
+++ b/src/apis/deploymentmanager/v2beta.ts
@@ -1390,13 +1390,13 @@ export class Resource$Compositetypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1446,11 +1446,12 @@ export class Resource$Compositetypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$CompositeType>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CompositeType>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$CompositeType>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CompositeType>,
       callback?: BodyResponseCallback<Schema$CompositeType>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CompositeType>,
       callback?: BodyResponseCallback<Schema$CompositeType>):
       void|AxiosPromise<Schema$CompositeType> {
@@ -1500,13 +1501,13 @@ export class Resource$Compositetypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1559,15 +1560,15 @@ export class Resource$Compositetypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CompositeTypesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$CompositeTypesListResponse>,
       callback?: BodyResponseCallback<Schema$CompositeTypesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$CompositeTypesListResponse>,
       callback?: BodyResponseCallback<Schema$CompositeTypesListResponse>):
@@ -1619,13 +1620,13 @@ export class Resource$Compositetypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1676,13 +1677,13 @@ export class Resource$Compositetypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1746,14 +1747,14 @@ export class Resource$Deployments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancelPreview(params: any, options?: MethodOptions):
+  cancelPreview(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   cancelPreview(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   cancelPreview(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1804,13 +1805,13 @@ export class Resource$Deployments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1860,11 +1861,11 @@ export class Resource$Deployments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Deployment>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Deployment>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Deployment>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Deployment>,
       callback?: BodyResponseCallback<Schema$Deployment>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Deployment>,
       callback?: BodyResponseCallback<Schema$Deployment>):
       void|AxiosPromise<Schema$Deployment> {
@@ -1915,13 +1916,13 @@ export class Resource$Deployments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -1973,13 +1974,13 @@ export class Resource$Deployments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2032,15 +2033,15 @@ export class Resource$Deployments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DeploymentsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$DeploymentsListResponse>,
       callback?: BodyResponseCallback<Schema$DeploymentsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$DeploymentsListResponse>,
       callback?: BodyResponseCallback<Schema$DeploymentsListResponse>):
@@ -2096,13 +2097,13 @@ export class Resource$Deployments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2154,13 +2155,13 @@ export class Resource$Deployments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -2211,13 +2212,13 @@ export class Resource$Deployments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  stop(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  stop(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   stop(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   stop(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2268,15 +2269,15 @@ export class Resource$Deployments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestPermissionsResponse>):
@@ -2332,13 +2333,13 @@ export class Resource$Deployments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2401,10 +2402,11 @@ export class Resource$Manifests {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Manifest>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Manifest>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Manifest>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Manifest>,
       callback?: BodyResponseCallback<Schema$Manifest>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Manifest>,
       callback?: BodyResponseCallback<Schema$Manifest>):
       void|AxiosPromise<Schema$Manifest> {
@@ -2458,14 +2460,15 @@ export class Resource$Manifests {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ManifestsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ManifestsListResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ManifestsListResponse>,
       callback?: BodyResponseCallback<Schema$ManifestsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ManifestsListResponse>,
       callback?: BodyResponseCallback<Schema$ManifestsListResponse>):
@@ -2528,11 +2531,11 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2585,15 +2588,15 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OperationsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OperationsListResponse>,
       callback?: BodyResponseCallback<Schema$OperationsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OperationsListResponse>,
       callback?: BodyResponseCallback<Schema$OperationsListResponse>):
@@ -2657,10 +2660,11 @@ export class Resource$Resources {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Resource>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Resource>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Resource>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Resource>,
       callback?: BodyResponseCallback<Schema$Resource>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Resource>,
       callback?: BodyResponseCallback<Schema$Resource>):
       void|AxiosPromise<Schema$Resource> {
@@ -2714,14 +2718,15 @@ export class Resource$Resources {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ResourcesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ResourcesListResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ResourcesListResponse>,
       callback?: BodyResponseCallback<Schema$ResourcesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ResourcesListResponse>,
       callback?: BodyResponseCallback<Schema$ResourcesListResponse>):
@@ -2784,13 +2789,13 @@ export class Resource$Typeproviders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2840,11 +2845,11 @@ export class Resource$Typeproviders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$TypeProvider>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TypeProvider>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$TypeProvider>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TypeProvider>,
       callback?: BodyResponseCallback<Schema$TypeProvider>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TypeProvider>,
       callback?: BodyResponseCallback<Schema$TypeProvider>):
       void|AxiosPromise<Schema$TypeProvider> {
@@ -2895,12 +2900,13 @@ export class Resource$Typeproviders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getType(params: any, options?: MethodOptions): AxiosPromise<Schema$TypeInfo>;
+  getType(params?: any, options?: MethodOptions): AxiosPromise<Schema$TypeInfo>;
   getType(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$TypeInfo>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TypeInfo>,
       callback?: BodyResponseCallback<Schema$TypeInfo>): void;
   getType(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TypeInfo>,
       callback?: BodyResponseCallback<Schema$TypeInfo>):
       void|AxiosPromise<Schema$TypeInfo> {
@@ -2950,13 +2956,13 @@ export class Resource$Typeproviders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3009,15 +3015,15 @@ export class Resource$Typeproviders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TypeProvidersListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TypeProvidersListResponse>,
       callback?: BodyResponseCallback<Schema$TypeProvidersListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TypeProvidersListResponse>,
       callback?: BodyResponseCallback<Schema$TypeProvidersListResponse>):
@@ -3072,16 +3078,16 @@ export class Resource$Typeproviders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listTypes(params: any, options?: MethodOptions):
+  listTypes(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TypeProvidersListTypesResponse>;
   listTypes(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TypeProvidersListTypesResponse>,
       callback?: BodyResponseCallback<Schema$TypeProvidersListTypesResponse>):
       void;
   listTypes(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TypeProvidersListTypesResponse>,
       callback?: BodyResponseCallback<Schema$TypeProvidersListTypesResponse>):
@@ -3135,13 +3141,13 @@ export class Resource$Typeproviders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3192,13 +3198,13 @@ export class Resource$Typeproviders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3263,14 +3269,14 @@ export class Resource$Types {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TypesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TypesListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TypesListResponse>,
       callback?: BodyResponseCallback<Schema$TypesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TypesListResponse>,
       callback?: BodyResponseCallback<Schema$TypesListResponse>):
       void|AxiosPromise<Schema$TypesListResponse> {
diff --git a/src/apis/dfareporting/v2.8.ts b/src/apis/dfareporting/v2.8.ts
index 9a08b49e75..bb10ee43c6 100644
--- a/src/apis/dfareporting/v2.8.ts
+++ b/src/apis/dfareporting/v2.8.ts
@@ -7495,13 +7495,13 @@ export class Resource$Accountactiveadsummaries {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$AccountActiveAdSummary>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AccountActiveAdSummary>,
       callback?: BodyResponseCallback<Schema$AccountActiveAdSummary>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AccountActiveAdSummary>,
       callback?: BodyResponseCallback<Schema$AccountActiveAdSummary>):
@@ -7612,13 +7612,13 @@ export class Resource$Accountpermissiongroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$AccountPermissionGroup>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AccountPermissionGroup>,
       callback?: BodyResponseCallback<Schema$AccountPermissionGroup>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AccountPermissionGroup>,
       callback?: BodyResponseCallback<Schema$AccountPermissionGroup>):
@@ -7713,17 +7713,17 @@ export class Resource$Accountpermissiongroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AccountPermissionGroupsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AccountPermissionGroupsListResponse>,
       callback?:
           BodyResponseCallback<Schema$AccountPermissionGroupsListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AccountPermissionGroupsListResponse>,
       callback?:
@@ -7839,12 +7839,12 @@ export class Resource$Accountpermissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$AccountPermission>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AccountPermission>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AccountPermission>,
       callback?: BodyResponseCallback<Schema$AccountPermission>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AccountPermission>,
       callback?: BodyResponseCallback<Schema$AccountPermission>):
       void|AxiosPromise<Schema$AccountPermission> {
@@ -7940,16 +7940,16 @@ export class Resource$Accountpermissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AccountPermissionsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AccountPermissionsListResponse>,
       callback?: BodyResponseCallback<Schema$AccountPermissionsListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AccountPermissionsListResponse>,
       callback?: BodyResponseCallback<Schema$AccountPermissionsListResponse>):
@@ -8064,10 +8064,12 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Account>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Account>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>):
       void|AxiosPromise<Schema$Account> {
     if (typeof options === 'function') {
@@ -8182,14 +8184,14 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AccountsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AccountsListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AccountsListResponse>,
       callback?: BodyResponseCallback<Schema$AccountsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AccountsListResponse>,
       callback?: BodyResponseCallback<Schema$AccountsListResponse>):
       void|AxiosPromise<Schema$AccountsListResponse> {
@@ -8295,12 +8297,14 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Account>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Account>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>):
       void|AxiosPromise<Schema$Account> {
     if (typeof options === 'function') {
@@ -8401,12 +8405,14 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Account>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Account>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>):
       void|AxiosPromise<Schema$Account> {
     if (typeof options === 'function') {
@@ -8516,12 +8522,12 @@ export class Resource$Accountuserprofiles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$AccountUserProfile>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AccountUserProfile>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AccountUserProfile>,
       callback?: BodyResponseCallback<Schema$AccountUserProfile>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AccountUserProfile>,
       callback?: BodyResponseCallback<Schema$AccountUserProfile>):
       void|AxiosPromise<Schema$AccountUserProfile> {
@@ -8620,14 +8626,14 @@ export class Resource$Accountuserprofiles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AccountUserProfile>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AccountUserProfile>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AccountUserProfile>,
       callback?: BodyResponseCallback<Schema$AccountUserProfile>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AccountUserProfile>,
       callback?: BodyResponseCallback<Schema$AccountUserProfile>):
       void|AxiosPromise<Schema$AccountUserProfile> {
@@ -8747,16 +8753,16 @@ export class Resource$Accountuserprofiles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AccountUserProfilesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AccountUserProfilesListResponse>,
       callback?: BodyResponseCallback<Schema$AccountUserProfilesListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AccountUserProfilesListResponse>,
       callback?: BodyResponseCallback<Schema$AccountUserProfilesListResponse>):
@@ -8867,14 +8873,14 @@ export class Resource$Accountuserprofiles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AccountUserProfile>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AccountUserProfile>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AccountUserProfile>,
       callback?: BodyResponseCallback<Schema$AccountUserProfile>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AccountUserProfile>,
       callback?: BodyResponseCallback<Schema$AccountUserProfile>):
       void|AxiosPromise<Schema$AccountUserProfile> {
@@ -8975,14 +8981,14 @@ export class Resource$Accountuserprofiles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AccountUserProfile>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AccountUserProfile>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AccountUserProfile>,
       callback?: BodyResponseCallback<Schema$AccountUserProfile>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AccountUserProfile>,
       callback?: BodyResponseCallback<Schema$AccountUserProfile>):
       void|AxiosPromise<Schema$AccountUserProfile> {
@@ -9094,10 +9100,10 @@ export class Resource$Ads {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Ad>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Ad>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Ad>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Ad>,
       callback?: BodyResponseCallback<Schema$Ad>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Ad>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Ad>,
       callback?: BodyResponseCallback<Schema$Ad>):
       void|AxiosPromise<Schema$Ad> {
     if (typeof options === 'function') {
@@ -9196,12 +9202,12 @@ export class Resource$Ads {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Ad>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Ad>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Ad>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Ad>,
       callback?: BodyResponseCallback<Schema$Ad>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Ad>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Ad>,
       callback?: BodyResponseCallback<Schema$Ad>):
       void|AxiosPromise<Schema$Ad> {
     if (typeof options === 'function') {
@@ -9331,14 +9337,14 @@ export class Resource$Ads {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AdsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AdsListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AdsListResponse>,
       callback?: BodyResponseCallback<Schema$AdsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AdsListResponse>,
       callback?: BodyResponseCallback<Schema$AdsListResponse>):
       void|AxiosPromise<Schema$AdsListResponse> {
@@ -9443,12 +9449,12 @@ export class Resource$Ads {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Ad>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Ad>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Ad>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Ad>,
       callback?: BodyResponseCallback<Schema$Ad>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Ad>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Ad>,
       callback?: BodyResponseCallback<Schema$Ad>):
       void|AxiosPromise<Schema$Ad> {
     if (typeof options === 'function') {
@@ -9548,12 +9554,12 @@ export class Resource$Ads {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Ad>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Ad>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Ad>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Ad>,
       callback?: BodyResponseCallback<Schema$Ad>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Ad>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Ad>,
       callback?: BodyResponseCallback<Schema$Ad>):
       void|AxiosPromise<Schema$Ad> {
     if (typeof options === 'function') {
@@ -9659,12 +9665,12 @@ export class Resource$Advertisergroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -9762,12 +9768,12 @@ export class Resource$Advertisergroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$AdvertiserGroup>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AdvertiserGroup>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AdvertiserGroup>,
       callback?: BodyResponseCallback<Schema$AdvertiserGroup>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AdvertiserGroup>,
       callback?: BodyResponseCallback<Schema$AdvertiserGroup>):
       void|AxiosPromise<Schema$AdvertiserGroup> {
@@ -9868,14 +9874,14 @@ export class Resource$Advertisergroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AdvertiserGroup>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AdvertiserGroup>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AdvertiserGroup>,
       callback?: BodyResponseCallback<Schema$AdvertiserGroup>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AdvertiserGroup>,
       callback?: BodyResponseCallback<Schema$AdvertiserGroup>):
       void|AxiosPromise<Schema$AdvertiserGroup> {
@@ -9992,16 +9998,16 @@ export class Resource$Advertisergroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AdvertiserGroupsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AdvertiserGroupsListResponse>,
       callback?: BodyResponseCallback<Schema$AdvertiserGroupsListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AdvertiserGroupsListResponse>,
       callback?: BodyResponseCallback<Schema$AdvertiserGroupsListResponse>):
@@ -10111,14 +10117,14 @@ export class Resource$Advertisergroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AdvertiserGroup>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AdvertiserGroup>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AdvertiserGroup>,
       callback?: BodyResponseCallback<Schema$AdvertiserGroup>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AdvertiserGroup>,
       callback?: BodyResponseCallback<Schema$AdvertiserGroup>):
       void|AxiosPromise<Schema$AdvertiserGroup> {
@@ -10221,14 +10227,14 @@ export class Resource$Advertisergroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AdvertiserGroup>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AdvertiserGroup>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AdvertiserGroup>,
       callback?: BodyResponseCallback<Schema$AdvertiserGroup>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AdvertiserGroup>,
       callback?: BodyResponseCallback<Schema$AdvertiserGroup>):
       void|AxiosPromise<Schema$AdvertiserGroup> {
@@ -10340,11 +10346,11 @@ export class Resource$Advertisers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Advertiser>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Advertiser>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Advertiser>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Advertiser>,
       callback?: BodyResponseCallback<Schema$Advertiser>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Advertiser>,
       callback?: BodyResponseCallback<Schema$Advertiser>):
       void|AxiosPromise<Schema$Advertiser> {
@@ -10445,13 +10451,14 @@ export class Resource$Advertisers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Advertiser>;
+  insert(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Advertiser>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Advertiser>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Advertiser>,
       callback?: BodyResponseCallback<Schema$Advertiser>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Advertiser>,
       callback?: BodyResponseCallback<Schema$Advertiser>):
       void|AxiosPromise<Schema$Advertiser> {
@@ -10573,15 +10580,15 @@ export class Resource$Advertisers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AdvertisersListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AdvertisersListResponse>,
       callback?: BodyResponseCallback<Schema$AdvertisersListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AdvertisersListResponse>,
       callback?: BodyResponseCallback<Schema$AdvertisersListResponse>):
@@ -10688,13 +10695,13 @@ export class Resource$Advertisers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Advertiser>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Advertiser>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Advertiser>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Advertiser>,
       callback?: BodyResponseCallback<Schema$Advertiser>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Advertiser>,
       callback?: BodyResponseCallback<Schema$Advertiser>):
       void|AxiosPromise<Schema$Advertiser> {
@@ -10796,13 +10803,14 @@ export class Resource$Advertisers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Advertiser>;
+  update(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Advertiser>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Advertiser>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Advertiser>,
       callback?: BodyResponseCallback<Schema$Advertiser>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Advertiser>,
       callback?: BodyResponseCallback<Schema$Advertiser>):
       void|AxiosPromise<Schema$Advertiser> {
@@ -10909,14 +10917,14 @@ export class Resource$Browsers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BrowsersListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BrowsersListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BrowsersListResponse>,
       callback?: BodyResponseCallback<Schema$BrowsersListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BrowsersListResponse>,
       callback?: BodyResponseCallback<Schema$BrowsersListResponse>):
       void|AxiosPromise<Schema$BrowsersListResponse> {
@@ -11032,16 +11040,16 @@ export class Resource$Campaigncreativeassociations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CampaignCreativeAssociation>;
   insert(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$CampaignCreativeAssociation>,
       callback?: BodyResponseCallback<Schema$CampaignCreativeAssociation>):
       void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$CampaignCreativeAssociation>,
       callback?: BodyResponseCallback<Schema$CampaignCreativeAssociation>):
@@ -11162,16 +11170,16 @@ export class Resource$Campaigncreativeassociations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CampaignCreativeAssociationsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$CampaignCreativeAssociationsListResponse>,
       callback?: BodyResponseCallback<
           Schema$CampaignCreativeAssociationsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$CampaignCreativeAssociationsListResponse>,
       callback?: BodyResponseCallback<
@@ -11287,10 +11295,11 @@ export class Resource$Campaigns {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Campaign>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Campaign>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Campaign>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Campaign>,
       callback?: BodyResponseCallback<Schema$Campaign>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Campaign>,
       callback?: BodyResponseCallback<Schema$Campaign>):
       void|AxiosPromise<Schema$Campaign> {
@@ -11399,12 +11408,13 @@ export class Resource$Campaigns {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Campaign>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Campaign>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Campaign>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Campaign>,
       callback?: BodyResponseCallback<Schema$Campaign>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Campaign>,
       callback?: BodyResponseCallback<Schema$Campaign>):
       void|AxiosPromise<Schema$Campaign> {
@@ -11527,14 +11537,15 @@ export class Resource$Campaigns {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CampaignsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CampaignsListResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$CampaignsListResponse>,
       callback?: BodyResponseCallback<Schema$CampaignsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$CampaignsListResponse>,
       callback?: BodyResponseCallback<Schema$CampaignsListResponse>):
@@ -11641,12 +11652,13 @@ export class Resource$Campaigns {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Campaign>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Campaign>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Campaign>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Campaign>,
       callback?: BodyResponseCallback<Schema$Campaign>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Campaign>,
       callback?: BodyResponseCallback<Schema$Campaign>):
       void|AxiosPromise<Schema$Campaign> {
@@ -11748,12 +11760,13 @@ export class Resource$Campaigns {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Campaign>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Campaign>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Campaign>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Campaign>,
       callback?: BodyResponseCallback<Schema$Campaign>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Campaign>,
       callback?: BodyResponseCallback<Schema$Campaign>):
       void|AxiosPromise<Schema$Campaign> {
@@ -11864,11 +11877,11 @@ export class Resource$Changelogs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$ChangeLog>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ChangeLog>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$ChangeLog>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ChangeLog>,
       callback?: BodyResponseCallback<Schema$ChangeLog>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ChangeLog>,
       callback?: BodyResponseCallback<Schema$ChangeLog>):
       void|AxiosPromise<Schema$ChangeLog> {
@@ -11986,15 +11999,15 @@ export class Resource$Changelogs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ChangeLogsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ChangeLogsListResponse>,
       callback?: BodyResponseCallback<Schema$ChangeLogsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ChangeLogsListResponse>,
       callback?: BodyResponseCallback<Schema$ChangeLogsListResponse>):
@@ -12106,14 +12119,14 @@ export class Resource$Cities {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CitiesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CitiesListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CitiesListResponse>,
       callback?: BodyResponseCallback<Schema$CitiesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CitiesListResponse>,
       callback?: BodyResponseCallback<Schema$CitiesListResponse>):
       void|AxiosPromise<Schema$CitiesListResponse> {
@@ -12224,12 +12237,12 @@ export class Resource$Connectiontypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$ConnectionType>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ConnectionType>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ConnectionType>,
       callback?: BodyResponseCallback<Schema$ConnectionType>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ConnectionType>,
       callback?: BodyResponseCallback<Schema$ConnectionType>):
       void|AxiosPromise<Schema$ConnectionType> {
@@ -12325,16 +12338,16 @@ export class Resource$Connectiontypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ConnectionTypesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ConnectionTypesListResponse>,
       callback?: BodyResponseCallback<Schema$ConnectionTypesListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ConnectionTypesListResponse>,
       callback?: BodyResponseCallback<Schema$ConnectionTypesListResponse>):
@@ -12444,12 +12457,12 @@ export class Resource$Contentcategories {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -12547,12 +12560,12 @@ export class Resource$Contentcategories {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$ContentCategory>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ContentCategory>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ContentCategory>,
       callback?: BodyResponseCallback<Schema$ContentCategory>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ContentCategory>,
       callback?: BodyResponseCallback<Schema$ContentCategory>):
       void|AxiosPromise<Schema$ContentCategory> {
@@ -12653,14 +12666,14 @@ export class Resource$Contentcategories {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ContentCategory>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ContentCategory>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ContentCategory>,
       callback?: BodyResponseCallback<Schema$ContentCategory>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ContentCategory>,
       callback?: BodyResponseCallback<Schema$ContentCategory>):
       void|AxiosPromise<Schema$ContentCategory> {
@@ -12777,16 +12790,16 @@ export class Resource$Contentcategories {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ContentCategoriesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ContentCategoriesListResponse>,
       callback?: BodyResponseCallback<Schema$ContentCategoriesListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ContentCategoriesListResponse>,
       callback?: BodyResponseCallback<Schema$ContentCategoriesListResponse>):
@@ -12896,14 +12909,14 @@ export class Resource$Contentcategories {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ContentCategory>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ContentCategory>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ContentCategory>,
       callback?: BodyResponseCallback<Schema$ContentCategory>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ContentCategory>,
       callback?: BodyResponseCallback<Schema$ContentCategory>):
       void|AxiosPromise<Schema$ContentCategory> {
@@ -13006,14 +13019,14 @@ export class Resource$Contentcategories {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ContentCategory>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ContentCategory>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ContentCategory>,
       callback?: BodyResponseCallback<Schema$ContentCategory>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ContentCategory>,
       callback?: BodyResponseCallback<Schema$ContentCategory>):
       void|AxiosPromise<Schema$ContentCategory> {
@@ -13126,16 +13139,16 @@ export class Resource$Conversions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchinsert(params: any, options?: MethodOptions):
+  batchinsert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ConversionsBatchInsertResponse>;
   batchinsert(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ConversionsBatchInsertResponse>,
       callback?: BodyResponseCallback<Schema$ConversionsBatchInsertResponse>):
       void;
   batchinsert(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ConversionsBatchInsertResponse>,
       callback?: BodyResponseCallback<Schema$ConversionsBatchInsertResponse>):
@@ -13239,16 +13252,16 @@ export class Resource$Conversions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchupdate(params: any, options?: MethodOptions):
+  batchupdate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ConversionsBatchUpdateResponse>;
   batchupdate(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ConversionsBatchUpdateResponse>,
       callback?: BodyResponseCallback<Schema$ConversionsBatchUpdateResponse>):
       void;
   batchupdate(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ConversionsBatchUpdateResponse>,
       callback?: BodyResponseCallback<Schema$ConversionsBatchUpdateResponse>):
@@ -13363,10 +13376,12 @@ export class Resource$Countries {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Country>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Country>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Country>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Country>,
       callback?: BodyResponseCallback<Schema$Country>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Country>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Country>,
       callback?: BodyResponseCallback<Schema$Country>):
       void|AxiosPromise<Schema$Country> {
     if (typeof options === 'function') {
@@ -13461,14 +13476,15 @@ export class Resource$Countries {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CountriesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CountriesListResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$CountriesListResponse>,
       callback?: BodyResponseCallback<Schema$CountriesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$CountriesListResponse>,
       callback?: BodyResponseCallback<Schema$CountriesListResponse>):
@@ -13595,14 +13611,15 @@ export class Resource$Creativeassets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreativeAssetMetadata>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CreativeAssetMetadata>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$CreativeAssetMetadata>,
       callback?: BodyResponseCallback<Schema$CreativeAssetMetadata>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$CreativeAssetMetadata>,
       callback?: BodyResponseCallback<Schema$CreativeAssetMetadata>):
@@ -13716,12 +13733,12 @@ export class Resource$Creativefields {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -13819,11 +13836,12 @@ export class Resource$Creativefields {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$CreativeField>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CreativeField>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$CreativeField>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CreativeField>,
       callback?: BodyResponseCallback<Schema$CreativeField>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CreativeField>,
       callback?: BodyResponseCallback<Schema$CreativeField>):
       void|AxiosPromise<Schema$CreativeField> {
@@ -13924,14 +13942,14 @@ export class Resource$Creativefields {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreativeField>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CreativeField>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CreativeField>,
       callback?: BodyResponseCallback<Schema$CreativeField>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CreativeField>,
       callback?: BodyResponseCallback<Schema$CreativeField>):
       void|AxiosPromise<Schema$CreativeField> {
@@ -14048,15 +14066,15 @@ export class Resource$Creativefields {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreativeFieldsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$CreativeFieldsListResponse>,
       callback?: BodyResponseCallback<Schema$CreativeFieldsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$CreativeFieldsListResponse>,
       callback?: BodyResponseCallback<Schema$CreativeFieldsListResponse>):
@@ -14164,14 +14182,14 @@ export class Resource$Creativefields {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreativeField>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CreativeField>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CreativeField>,
       callback?: BodyResponseCallback<Schema$CreativeField>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CreativeField>,
       callback?: BodyResponseCallback<Schema$CreativeField>):
       void|AxiosPromise<Schema$CreativeField> {
@@ -14273,14 +14291,14 @@ export class Resource$Creativefields {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreativeField>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CreativeField>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CreativeField>,
       callback?: BodyResponseCallback<Schema$CreativeField>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CreativeField>,
       callback?: BodyResponseCallback<Schema$CreativeField>):
       void|AxiosPromise<Schema$CreativeField> {
@@ -14392,12 +14410,12 @@ export class Resource$Creativefieldvalues {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -14499,12 +14517,12 @@ export class Resource$Creativefieldvalues {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$CreativeFieldValue>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CreativeFieldValue>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CreativeFieldValue>,
       callback?: BodyResponseCallback<Schema$CreativeFieldValue>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CreativeFieldValue>,
       callback?: BodyResponseCallback<Schema$CreativeFieldValue>):
       void|AxiosPromise<Schema$CreativeFieldValue> {
@@ -14607,14 +14625,14 @@ export class Resource$Creativefieldvalues {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreativeFieldValue>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CreativeFieldValue>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CreativeFieldValue>,
       callback?: BodyResponseCallback<Schema$CreativeFieldValue>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CreativeFieldValue>,
       callback?: BodyResponseCallback<Schema$CreativeFieldValue>):
       void|AxiosPromise<Schema$CreativeFieldValue> {
@@ -14735,16 +14753,16 @@ export class Resource$Creativefieldvalues {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreativeFieldValuesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$CreativeFieldValuesListResponse>,
       callback?: BodyResponseCallback<Schema$CreativeFieldValuesListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$CreativeFieldValuesListResponse>,
       callback?: BodyResponseCallback<Schema$CreativeFieldValuesListResponse>):
@@ -14859,14 +14877,14 @@ export class Resource$Creativefieldvalues {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreativeFieldValue>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CreativeFieldValue>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CreativeFieldValue>,
       callback?: BodyResponseCallback<Schema$CreativeFieldValue>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CreativeFieldValue>,
       callback?: BodyResponseCallback<Schema$CreativeFieldValue>):
       void|AxiosPromise<Schema$CreativeFieldValue> {
@@ -14971,14 +14989,14 @@ export class Resource$Creativefieldvalues {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreativeFieldValue>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CreativeFieldValue>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CreativeFieldValue>,
       callback?: BodyResponseCallback<Schema$CreativeFieldValue>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CreativeFieldValue>,
       callback?: BodyResponseCallback<Schema$CreativeFieldValue>):
       void|AxiosPromise<Schema$CreativeFieldValue> {
@@ -15090,11 +15108,12 @@ export class Resource$Creativegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$CreativeGroup>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CreativeGroup>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$CreativeGroup>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CreativeGroup>,
       callback?: BodyResponseCallback<Schema$CreativeGroup>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CreativeGroup>,
       callback?: BodyResponseCallback<Schema$CreativeGroup>):
       void|AxiosPromise<Schema$CreativeGroup> {
@@ -15195,14 +15214,14 @@ export class Resource$Creativegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreativeGroup>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CreativeGroup>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CreativeGroup>,
       callback?: BodyResponseCallback<Schema$CreativeGroup>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CreativeGroup>,
       callback?: BodyResponseCallback<Schema$CreativeGroup>):
       void|AxiosPromise<Schema$CreativeGroup> {
@@ -15320,15 +15339,15 @@ export class Resource$Creativegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreativeGroupsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$CreativeGroupsListResponse>,
       callback?: BodyResponseCallback<Schema$CreativeGroupsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$CreativeGroupsListResponse>,
       callback?: BodyResponseCallback<Schema$CreativeGroupsListResponse>):
@@ -15436,14 +15455,14 @@ export class Resource$Creativegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreativeGroup>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CreativeGroup>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CreativeGroup>,
       callback?: BodyResponseCallback<Schema$CreativeGroup>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CreativeGroup>,
       callback?: BodyResponseCallback<Schema$CreativeGroup>):
       void|AxiosPromise<Schema$CreativeGroup> {
@@ -15545,14 +15564,14 @@ export class Resource$Creativegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreativeGroup>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CreativeGroup>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CreativeGroup>,
       callback?: BodyResponseCallback<Schema$CreativeGroup>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CreativeGroup>,
       callback?: BodyResponseCallback<Schema$CreativeGroup>):
       void|AxiosPromise<Schema$CreativeGroup> {
@@ -15663,10 +15682,11 @@ export class Resource$Creatives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Creative>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Creative>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Creative>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Creative>,
       callback?: BodyResponseCallback<Schema$Creative>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Creative>,
       callback?: BodyResponseCallback<Schema$Creative>):
       void|AxiosPromise<Schema$Creative> {
@@ -15766,12 +15786,13 @@ export class Resource$Creatives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Creative>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Creative>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Creative>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Creative>,
       callback?: BodyResponseCallback<Schema$Creative>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Creative>,
       callback?: BodyResponseCallback<Schema$Creative>):
       void|AxiosPromise<Schema$Creative> {
@@ -15896,14 +15917,15 @@ export class Resource$Creatives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreativesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CreativesListResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$CreativesListResponse>,
       callback?: BodyResponseCallback<Schema$CreativesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$CreativesListResponse>,
       callback?: BodyResponseCallback<Schema$CreativesListResponse>):
@@ -16010,12 +16032,13 @@ export class Resource$Creatives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Creative>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Creative>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Creative>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Creative>,
       callback?: BodyResponseCallback<Schema$Creative>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Creative>,
       callback?: BodyResponseCallback<Schema$Creative>):
       void|AxiosPromise<Schema$Creative> {
@@ -16117,12 +16140,13 @@ export class Resource$Creatives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Creative>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Creative>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Creative>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Creative>,
       callback?: BodyResponseCallback<Schema$Creative>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Creative>,
       callback?: BodyResponseCallback<Schema$Creative>):
       void|AxiosPromise<Schema$Creative> {
@@ -16249,14 +16273,14 @@ export class Resource$Dimensionvalues {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  query(params: any, options?: MethodOptions):
+  query(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DimensionValueList>;
   query(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DimensionValueList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DimensionValueList>,
       callback?: BodyResponseCallback<Schema$DimensionValueList>): void;
   query(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DimensionValueList>,
       callback?: BodyResponseCallback<Schema$DimensionValueList>):
       void|AxiosPromise<Schema$DimensionValueList> {
@@ -16368,12 +16392,12 @@ export class Resource$Directorysitecontacts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$DirectorySiteContact>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DirectorySiteContact>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DirectorySiteContact>,
       callback?: BodyResponseCallback<Schema$DirectorySiteContact>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DirectorySiteContact>,
       callback?: BodyResponseCallback<Schema$DirectorySiteContact>):
       void|AxiosPromise<Schema$DirectorySiteContact> {
@@ -16491,16 +16515,16 @@ export class Resource$Directorysitecontacts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DirectorySiteContactsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$DirectorySiteContactsListResponse>,
       callback?:
           BodyResponseCallback<Schema$DirectorySiteContactsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$DirectorySiteContactsListResponse>,
       callback?:
@@ -16616,11 +16640,12 @@ export class Resource$Directorysites {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$DirectorySite>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DirectorySite>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$DirectorySite>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DirectorySite>,
       callback?: BodyResponseCallback<Schema$DirectorySite>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DirectorySite>,
       callback?: BodyResponseCallback<Schema$DirectorySite>):
       void|AxiosPromise<Schema$DirectorySite> {
@@ -16721,14 +16746,14 @@ export class Resource$Directorysites {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DirectorySite>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DirectorySite>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DirectorySite>,
       callback?: BodyResponseCallback<Schema$DirectorySite>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DirectorySite>,
       callback?: BodyResponseCallback<Schema$DirectorySite>):
       void|AxiosPromise<Schema$DirectorySite> {
@@ -16851,15 +16876,15 @@ export class Resource$Directorysites {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DirectorySitesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$DirectorySitesListResponse>,
       callback?: BodyResponseCallback<Schema$DirectorySitesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$DirectorySitesListResponse>,
       callback?: BodyResponseCallback<Schema$DirectorySitesListResponse>):
@@ -16978,12 +17003,12 @@ export class Resource$Dynamictargetingkeys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -17083,14 +17108,14 @@ export class Resource$Dynamictargetingkeys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DynamicTargetingKey>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DynamicTargetingKey>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DynamicTargetingKey>,
       callback?: BodyResponseCallback<Schema$DynamicTargetingKey>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DynamicTargetingKey>,
       callback?: BodyResponseCallback<Schema$DynamicTargetingKey>):
       void|AxiosPromise<Schema$DynamicTargetingKey> {
@@ -17190,16 +17215,16 @@ export class Resource$Dynamictargetingkeys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DynamicTargetingKeysListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$DynamicTargetingKeysListResponse>,
       callback?: BodyResponseCallback<Schema$DynamicTargetingKeysListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$DynamicTargetingKeysListResponse>,
       callback?: BodyResponseCallback<Schema$DynamicTargetingKeysListResponse>):
@@ -17311,12 +17336,12 @@ export class Resource$Eventtags {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -17413,10 +17438,11 @@ export class Resource$Eventtags {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$EventTag>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$EventTag>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$EventTag>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$EventTag>,
       callback?: BodyResponseCallback<Schema$EventTag>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$EventTag>,
       callback?: BodyResponseCallback<Schema$EventTag>):
       void|AxiosPromise<Schema$EventTag> {
@@ -17516,12 +17542,13 @@ export class Resource$Eventtags {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$EventTag>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$EventTag>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$EventTag>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$EventTag>,
       callback?: BodyResponseCallback<Schema$EventTag>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$EventTag>,
       callback?: BodyResponseCallback<Schema$EventTag>):
       void|AxiosPromise<Schema$EventTag> {
@@ -17626,14 +17653,15 @@ export class Resource$Eventtags {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$EventTagsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$EventTagsListResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$EventTagsListResponse>,
       callback?: BodyResponseCallback<Schema$EventTagsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$EventTagsListResponse>,
       callback?: BodyResponseCallback<Schema$EventTagsListResponse>):
@@ -17740,12 +17768,13 @@ export class Resource$Eventtags {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$EventTag>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$EventTag>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$EventTag>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$EventTag>,
       callback?: BodyResponseCallback<Schema$EventTag>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$EventTag>,
       callback?: BodyResponseCallback<Schema$EventTag>):
       void|AxiosPromise<Schema$EventTag> {
@@ -17847,12 +17876,13 @@ export class Resource$Eventtags {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$EventTag>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$EventTag>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$EventTag>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$EventTag>,
       callback?: BodyResponseCallback<Schema$EventTag>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$EventTag>,
       callback?: BodyResponseCallback<Schema$EventTag>):
       void|AxiosPromise<Schema$EventTag> {
@@ -17968,10 +17998,10 @@ export class Resource$Files {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$File>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$File>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$File>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
       callback?: BodyResponseCallback<Schema$File>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
       callback?: BodyResponseCallback<Schema$File>):
       void|AxiosPromise<Schema$File> {
     if (typeof options === 'function') {
@@ -18083,12 +18113,13 @@ export class Resource$Files {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$FileList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$FileList>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$FileList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$FileList>,
       callback?: BodyResponseCallback<Schema$FileList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$FileList>,
       callback?: BodyResponseCallback<Schema$FileList>):
       void|AxiosPromise<Schema$FileList> {
@@ -18195,12 +18226,12 @@ export class Resource$Floodlightactivities {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -18293,17 +18324,17 @@ export class Resource$Floodlightactivities {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  generatetag(params: any, options?: MethodOptions):
+  generatetag(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FloodlightActivitiesGenerateTagResponse>;
   generatetag(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightActivitiesGenerateTagResponse>,
       callback?:
           BodyResponseCallback<Schema$FloodlightActivitiesGenerateTagResponse>):
       void;
   generatetag(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightActivitiesGenerateTagResponse>,
       callback?:
@@ -18407,12 +18438,12 @@ export class Resource$Floodlightactivities {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$FloodlightActivity>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$FloodlightActivity>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$FloodlightActivity>,
       callback?: BodyResponseCallback<Schema$FloodlightActivity>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$FloodlightActivity>,
       callback?: BodyResponseCallback<Schema$FloodlightActivity>):
       void|AxiosPromise<Schema$FloodlightActivity> {
@@ -18511,14 +18542,14 @@ export class Resource$Floodlightactivities {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FloodlightActivity>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$FloodlightActivity>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$FloodlightActivity>,
       callback?: BodyResponseCallback<Schema$FloodlightActivity>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$FloodlightActivity>,
       callback?: BodyResponseCallback<Schema$FloodlightActivity>):
       void|AxiosPromise<Schema$FloodlightActivity> {
@@ -18642,16 +18673,16 @@ export class Resource$Floodlightactivities {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FloodlightActivitiesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightActivitiesListResponse>,
       callback?: BodyResponseCallback<Schema$FloodlightActivitiesListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightActivitiesListResponse>,
       callback?: BodyResponseCallback<Schema$FloodlightActivitiesListResponse>):
@@ -18760,14 +18791,14 @@ export class Resource$Floodlightactivities {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FloodlightActivity>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$FloodlightActivity>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$FloodlightActivity>,
       callback?: BodyResponseCallback<Schema$FloodlightActivity>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$FloodlightActivity>,
       callback?: BodyResponseCallback<Schema$FloodlightActivity>):
       void|AxiosPromise<Schema$FloodlightActivity> {
@@ -18868,14 +18899,14 @@ export class Resource$Floodlightactivities {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FloodlightActivity>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$FloodlightActivity>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$FloodlightActivity>,
       callback?: BodyResponseCallback<Schema$FloodlightActivity>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$FloodlightActivity>,
       callback?: BodyResponseCallback<Schema$FloodlightActivity>):
       void|AxiosPromise<Schema$FloodlightActivity> {
@@ -18985,13 +19016,13 @@ export class Resource$Floodlightactivitygroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$FloodlightActivityGroup>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightActivityGroup>,
       callback?: BodyResponseCallback<Schema$FloodlightActivityGroup>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightActivityGroup>,
       callback?: BodyResponseCallback<Schema$FloodlightActivityGroup>):
@@ -19091,15 +19122,15 @@ export class Resource$Floodlightactivitygroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FloodlightActivityGroup>;
   insert(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightActivityGroup>,
       callback?: BodyResponseCallback<Schema$FloodlightActivityGroup>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightActivityGroup>,
       callback?: BodyResponseCallback<Schema$FloodlightActivityGroup>):
@@ -19221,17 +19252,17 @@ export class Resource$Floodlightactivitygroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FloodlightActivityGroupsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightActivityGroupsListResponse>,
       callback?:
           BodyResponseCallback<Schema$FloodlightActivityGroupsListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightActivityGroupsListResponse>,
       callback?:
@@ -19341,15 +19372,15 @@ export class Resource$Floodlightactivitygroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FloodlightActivityGroup>;
   patch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightActivityGroup>,
       callback?: BodyResponseCallback<Schema$FloodlightActivityGroup>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightActivityGroup>,
       callback?: BodyResponseCallback<Schema$FloodlightActivityGroup>):
@@ -19451,15 +19482,15 @@ export class Resource$Floodlightactivitygroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FloodlightActivityGroup>;
   update(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightActivityGroup>,
       callback?: BodyResponseCallback<Schema$FloodlightActivityGroup>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightActivityGroup>,
       callback?: BodyResponseCallback<Schema$FloodlightActivityGroup>):
@@ -19570,13 +19601,13 @@ export class Resource$Floodlightconfigurations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$FloodlightConfiguration>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightConfiguration>,
       callback?: BodyResponseCallback<Schema$FloodlightConfiguration>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightConfiguration>,
       callback?: BodyResponseCallback<Schema$FloodlightConfiguration>):
@@ -19672,17 +19703,17 @@ export class Resource$Floodlightconfigurations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FloodlightConfigurationsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightConfigurationsListResponse>,
       callback?:
           BodyResponseCallback<Schema$FloodlightConfigurationsListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightConfigurationsListResponse>,
       callback?:
@@ -19792,15 +19823,15 @@ export class Resource$Floodlightconfigurations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FloodlightConfiguration>;
   patch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightConfiguration>,
       callback?: BodyResponseCallback<Schema$FloodlightConfiguration>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightConfiguration>,
       callback?: BodyResponseCallback<Schema$FloodlightConfiguration>):
@@ -19902,15 +19933,15 @@ export class Resource$Floodlightconfigurations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FloodlightConfiguration>;
   update(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightConfiguration>,
       callback?: BodyResponseCallback<Schema$FloodlightConfiguration>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightConfiguration>,
       callback?: BodyResponseCallback<Schema$FloodlightConfiguration>):
@@ -20027,11 +20058,12 @@ export class Resource$Inventoryitems {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$InventoryItem>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InventoryItem>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$InventoryItem>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InventoryItem>,
       callback?: BodyResponseCallback<Schema$InventoryItem>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InventoryItem>,
       callback?: BodyResponseCallback<Schema$InventoryItem>):
       void|AxiosPromise<Schema$InventoryItem> {
@@ -20155,15 +20187,15 @@ export class Resource$Inventoryitems {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InventoryItemsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InventoryItemsListResponse>,
       callback?: BodyResponseCallback<Schema$InventoryItemsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InventoryItemsListResponse>,
       callback?: BodyResponseCallback<Schema$InventoryItemsListResponse>):
@@ -20277,12 +20309,12 @@ export class Resource$Landingpages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -20384,11 +20416,11 @@ export class Resource$Landingpages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$LandingPage>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LandingPage>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$LandingPage>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LandingPage>,
       callback?: BodyResponseCallback<Schema$LandingPage>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LandingPage>,
       callback?: BodyResponseCallback<Schema$LandingPage>):
       void|AxiosPromise<Schema$LandingPage> {
@@ -20493,14 +20525,14 @@ export class Resource$Landingpages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LandingPage>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LandingPage>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LandingPage>,
       callback?: BodyResponseCallback<Schema$LandingPage>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LandingPage>,
       callback?: BodyResponseCallback<Schema$LandingPage>):
       void|AxiosPromise<Schema$LandingPage> {
@@ -20600,15 +20632,15 @@ export class Resource$Landingpages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LandingPagesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$LandingPagesListResponse>,
       callback?: BodyResponseCallback<Schema$LandingPagesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$LandingPagesListResponse>,
       callback?: BodyResponseCallback<Schema$LandingPagesListResponse>):
@@ -20721,13 +20753,14 @@ export class Resource$Landingpages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$LandingPage>;
+  patch(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$LandingPage>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LandingPage>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LandingPage>,
       callback?: BodyResponseCallback<Schema$LandingPage>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LandingPage>,
       callback?: BodyResponseCallback<Schema$LandingPage>):
       void|AxiosPromise<Schema$LandingPage> {
@@ -20834,14 +20867,14 @@ export class Resource$Landingpages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LandingPage>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LandingPage>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LandingPage>,
       callback?: BodyResponseCallback<Schema$LandingPage>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LandingPage>,
       callback?: BodyResponseCallback<Schema$LandingPage>):
       void|AxiosPromise<Schema$LandingPage> {
@@ -20949,14 +20982,15 @@ export class Resource$Languages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LanguagesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LanguagesListResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$LanguagesListResponse>,
       callback?: BodyResponseCallback<Schema$LanguagesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$LanguagesListResponse>,
       callback?: BodyResponseCallback<Schema$LanguagesListResponse>):
@@ -21064,14 +21098,14 @@ export class Resource$Metros {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$MetrosListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$MetrosListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$MetrosListResponse>,
       callback?: BodyResponseCallback<Schema$MetrosListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$MetrosListResponse>,
       callback?: BodyResponseCallback<Schema$MetrosListResponse>):
       void|AxiosPromise<Schema$MetrosListResponse> {
@@ -21182,11 +21216,12 @@ export class Resource$Mobilecarriers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$MobileCarrier>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$MobileCarrier>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$MobileCarrier>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$MobileCarrier>,
       callback?: BodyResponseCallback<Schema$MobileCarrier>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$MobileCarrier>,
       callback?: BodyResponseCallback<Schema$MobileCarrier>):
       void|AxiosPromise<Schema$MobileCarrier> {
@@ -21282,15 +21317,15 @@ export class Resource$Mobilecarriers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$MobileCarriersListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$MobileCarriersListResponse>,
       callback?: BodyResponseCallback<Schema$MobileCarriersListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$MobileCarriersListResponse>,
       callback?: BodyResponseCallback<Schema$MobileCarriersListResponse>):
@@ -21402,12 +21437,12 @@ export class Resource$Operatingsystems {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$OperatingSystem>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$OperatingSystem>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OperatingSystem>,
       callback?: BodyResponseCallback<Schema$OperatingSystem>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$OperatingSystem>,
       callback?: BodyResponseCallback<Schema$OperatingSystem>):
       void|AxiosPromise<Schema$OperatingSystem> {
@@ -21503,16 +21538,16 @@ export class Resource$Operatingsystems {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OperatingSystemsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OperatingSystemsListResponse>,
       callback?: BodyResponseCallback<Schema$OperatingSystemsListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OperatingSystemsListResponse>,
       callback?: BodyResponseCallback<Schema$OperatingSystemsListResponse>):
@@ -21624,13 +21659,13 @@ export class Resource$Operatingsystemversions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$OperatingSystemVersion>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OperatingSystemVersion>,
       callback?: BodyResponseCallback<Schema$OperatingSystemVersion>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OperatingSystemVersion>,
       callback?: BodyResponseCallback<Schema$OperatingSystemVersion>):
@@ -21725,17 +21760,17 @@ export class Resource$Operatingsystemversions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OperatingSystemVersionsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OperatingSystemVersionsListResponse>,
       callback?:
           BodyResponseCallback<Schema$OperatingSystemVersionsListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OperatingSystemVersionsListResponse>,
       callback?:
@@ -21855,11 +21890,12 @@ export class Resource$Orderdocuments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$OrderDocument>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$OrderDocument>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$OrderDocument>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OrderDocument>,
       callback?: BodyResponseCallback<Schema$OrderDocument>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$OrderDocument>,
       callback?: BodyResponseCallback<Schema$OrderDocument>):
       void|AxiosPromise<Schema$OrderDocument> {
@@ -21983,15 +22019,15 @@ export class Resource$Orderdocuments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrderDocumentsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OrderDocumentsListResponse>,
       callback?: BodyResponseCallback<Schema$OrderDocumentsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OrderDocumentsListResponse>,
       callback?: BodyResponseCallback<Schema$OrderDocumentsListResponse>):
@@ -22108,10 +22144,10 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Order>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Order>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Order>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Order>,
       callback?: BodyResponseCallback<Schema$Order>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Order>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Order>,
       callback?: BodyResponseCallback<Schema$Order>):
       void|AxiosPromise<Schema$Order> {
     if (typeof options === 'function') {
@@ -22231,14 +22267,14 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$OrdersListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OrdersListResponse>,
       callback?: BodyResponseCallback<Schema$OrdersListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$OrdersListResponse>,
       callback?: BodyResponseCallback<Schema$OrdersListResponse>):
       void|AxiosPromise<Schema$OrdersListResponse> {
@@ -22350,12 +22386,12 @@ export class Resource$Placementgroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$PlacementGroup>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PlacementGroup>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PlacementGroup>,
       callback?: BodyResponseCallback<Schema$PlacementGroup>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PlacementGroup>,
       callback?: BodyResponseCallback<Schema$PlacementGroup>):
       void|AxiosPromise<Schema$PlacementGroup> {
@@ -22456,14 +22492,14 @@ export class Resource$Placementgroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PlacementGroup>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PlacementGroup>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PlacementGroup>,
       callback?: BodyResponseCallback<Schema$PlacementGroup>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PlacementGroup>,
       callback?: BodyResponseCallback<Schema$PlacementGroup>):
       void|AxiosPromise<Schema$PlacementGroup> {
@@ -22592,16 +22628,16 @@ export class Resource$Placementgroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PlacementGroupsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$PlacementGroupsListResponse>,
       callback?: BodyResponseCallback<Schema$PlacementGroupsListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$PlacementGroupsListResponse>,
       callback?: BodyResponseCallback<Schema$PlacementGroupsListResponse>):
@@ -22710,14 +22746,14 @@ export class Resource$Placementgroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PlacementGroup>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PlacementGroup>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PlacementGroup>,
       callback?: BodyResponseCallback<Schema$PlacementGroup>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PlacementGroup>,
       callback?: BodyResponseCallback<Schema$PlacementGroup>):
       void|AxiosPromise<Schema$PlacementGroup> {
@@ -22819,14 +22855,14 @@ export class Resource$Placementgroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PlacementGroup>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PlacementGroup>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PlacementGroup>,
       callback?: BodyResponseCallback<Schema$PlacementGroup>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PlacementGroup>,
       callback?: BodyResponseCallback<Schema$PlacementGroup>):
       void|AxiosPromise<Schema$PlacementGroup> {
@@ -22936,16 +22972,16 @@ export class Resource$Placements {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  generatetags(params: any, options?: MethodOptions):
+  generatetags(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PlacementsGenerateTagsResponse>;
   generatetags(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$PlacementsGenerateTagsResponse>,
       callback?: BodyResponseCallback<Schema$PlacementsGenerateTagsResponse>):
       void;
   generatetags(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$PlacementsGenerateTagsResponse>,
       callback?: BodyResponseCallback<Schema$PlacementsGenerateTagsResponse>):
@@ -23048,11 +23084,11 @@ export class Resource$Placements {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Placement>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Placement>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Placement>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Placement>,
       callback?: BodyResponseCallback<Schema$Placement>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Placement>,
       callback?: BodyResponseCallback<Schema$Placement>):
       void|AxiosPromise<Schema$Placement> {
@@ -23152,13 +23188,13 @@ export class Resource$Placements {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Placement>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Placement>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Placement>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Placement>,
       callback?: BodyResponseCallback<Schema$Placement>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Placement>,
       callback?: BodyResponseCallback<Schema$Placement>):
       void|AxiosPromise<Schema$Placement> {
@@ -23289,15 +23325,15 @@ export class Resource$Placements {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PlacementsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$PlacementsListResponse>,
       callback?: BodyResponseCallback<Schema$PlacementsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$PlacementsListResponse>,
       callback?: BodyResponseCallback<Schema$PlacementsListResponse>):
@@ -23404,13 +23440,13 @@ export class Resource$Placements {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Placement>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Placement>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Placement>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Placement>,
       callback?: BodyResponseCallback<Schema$Placement>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Placement>,
       callback?: BodyResponseCallback<Schema$Placement>):
       void|AxiosPromise<Schema$Placement> {
@@ -23512,13 +23548,13 @@ export class Resource$Placements {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Placement>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Placement>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Placement>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Placement>,
       callback?: BodyResponseCallback<Schema$Placement>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Placement>,
       callback?: BodyResponseCallback<Schema$Placement>):
       void|AxiosPromise<Schema$Placement> {
@@ -23626,12 +23662,12 @@ export class Resource$Placementstrategies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -23729,12 +23765,12 @@ export class Resource$Placementstrategies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$PlacementStrategy>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PlacementStrategy>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PlacementStrategy>,
       callback?: BodyResponseCallback<Schema$PlacementStrategy>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PlacementStrategy>,
       callback?: BodyResponseCallback<Schema$PlacementStrategy>):
       void|AxiosPromise<Schema$PlacementStrategy> {
@@ -23833,14 +23869,14 @@ export class Resource$Placementstrategies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PlacementStrategy>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PlacementStrategy>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PlacementStrategy>,
       callback?: BodyResponseCallback<Schema$PlacementStrategy>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PlacementStrategy>,
       callback?: BodyResponseCallback<Schema$PlacementStrategy>):
       void|AxiosPromise<Schema$PlacementStrategy> {
@@ -23957,16 +23993,16 @@ export class Resource$Placementstrategies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PlacementStrategiesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$PlacementStrategiesListResponse>,
       callback?: BodyResponseCallback<Schema$PlacementStrategiesListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$PlacementStrategiesListResponse>,
       callback?: BodyResponseCallback<Schema$PlacementStrategiesListResponse>):
@@ -24077,14 +24113,14 @@ export class Resource$Placementstrategies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PlacementStrategy>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PlacementStrategy>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PlacementStrategy>,
       callback?: BodyResponseCallback<Schema$PlacementStrategy>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PlacementStrategy>,
       callback?: BodyResponseCallback<Schema$PlacementStrategy>):
       void|AxiosPromise<Schema$PlacementStrategy> {
@@ -24185,14 +24221,14 @@ export class Resource$Placementstrategies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PlacementStrategy>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PlacementStrategy>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PlacementStrategy>,
       callback?: BodyResponseCallback<Schema$PlacementStrategy>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PlacementStrategy>,
       callback?: BodyResponseCallback<Schema$PlacementStrategy>):
       void|AxiosPromise<Schema$PlacementStrategy> {
@@ -24304,11 +24340,11 @@ export class Resource$Platformtypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$PlatformType>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PlatformType>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$PlatformType>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PlatformType>,
       callback?: BodyResponseCallback<Schema$PlatformType>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PlatformType>,
       callback?: BodyResponseCallback<Schema$PlatformType>):
       void|AxiosPromise<Schema$PlatformType> {
@@ -24404,15 +24440,15 @@ export class Resource$Platformtypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PlatformTypesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$PlatformTypesListResponse>,
       callback?: BodyResponseCallback<Schema$PlatformTypesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$PlatformTypesListResponse>,
       callback?: BodyResponseCallback<Schema$PlatformTypesListResponse>):
@@ -24524,11 +24560,11 @@ export class Resource$Postalcodes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$PostalCode>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PostalCode>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$PostalCode>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PostalCode>,
       callback?: BodyResponseCallback<Schema$PostalCode>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PostalCode>,
       callback?: BodyResponseCallback<Schema$PostalCode>):
       void|AxiosPromise<Schema$PostalCode> {
@@ -24624,15 +24660,15 @@ export class Resource$Postalcodes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PostalCodesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$PostalCodesListResponse>,
       callback?: BodyResponseCallback<Schema$PostalCodesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$PostalCodesListResponse>,
       callback?: BodyResponseCallback<Schema$PostalCodesListResponse>):
@@ -24744,10 +24780,12 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Project>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Project>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Project>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Project>,
       callback?: BodyResponseCallback<Schema$Project>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Project>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Project>,
       callback?: BodyResponseCallback<Schema$Project>):
       void|AxiosPromise<Schema$Project> {
     if (typeof options === 'function') {
@@ -24862,14 +24900,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ProjectsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ProjectsListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ProjectsListResponse>,
       callback?: BodyResponseCallback<Schema$ProjectsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ProjectsListResponse>,
       callback?: BodyResponseCallback<Schema$ProjectsListResponse>):
       void|AxiosPromise<Schema$ProjectsListResponse> {
@@ -24976,14 +25014,14 @@ export class Resource$Regions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RegionsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RegionsListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RegionsListResponse>,
       callback?: BodyResponseCallback<Schema$RegionsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RegionsListResponse>,
       callback?: BodyResponseCallback<Schema$RegionsListResponse>):
       void|AxiosPromise<Schema$RegionsListResponse> {
@@ -25094,12 +25132,12 @@ export class Resource$Remarketinglists {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$RemarketingList>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RemarketingList>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RemarketingList>,
       callback?: BodyResponseCallback<Schema$RemarketingList>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RemarketingList>,
       callback?: BodyResponseCallback<Schema$RemarketingList>):
       void|AxiosPromise<Schema$RemarketingList> {
@@ -25200,14 +25238,14 @@ export class Resource$Remarketinglists {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RemarketingList>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RemarketingList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RemarketingList>,
       callback?: BodyResponseCallback<Schema$RemarketingList>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RemarketingList>,
       callback?: BodyResponseCallback<Schema$RemarketingList>):
       void|AxiosPromise<Schema$RemarketingList> {
@@ -25329,16 +25367,16 @@ export class Resource$Remarketinglists {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RemarketingListsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$RemarketingListsListResponse>,
       callback?: BodyResponseCallback<Schema$RemarketingListsListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$RemarketingListsListResponse>,
       callback?: BodyResponseCallback<Schema$RemarketingListsListResponse>):
@@ -25448,14 +25486,14 @@ export class Resource$Remarketinglists {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RemarketingList>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RemarketingList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RemarketingList>,
       callback?: BodyResponseCallback<Schema$RemarketingList>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RemarketingList>,
       callback?: BodyResponseCallback<Schema$RemarketingList>):
       void|AxiosPromise<Schema$RemarketingList> {
@@ -25558,14 +25596,14 @@ export class Resource$Remarketinglists {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RemarketingList>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RemarketingList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RemarketingList>,
       callback?: BodyResponseCallback<Schema$RemarketingList>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RemarketingList>,
       callback?: BodyResponseCallback<Schema$RemarketingList>):
       void|AxiosPromise<Schema$RemarketingList> {
@@ -25677,12 +25715,12 @@ export class Resource$Remarketinglistshares {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$RemarketingListShare>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RemarketingListShare>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RemarketingListShare>,
       callback?: BodyResponseCallback<Schema$RemarketingListShare>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RemarketingListShare>,
       callback?: BodyResponseCallback<Schema$RemarketingListShare>):
       void|AxiosPromise<Schema$RemarketingListShare> {
@@ -25788,14 +25826,14 @@ export class Resource$Remarketinglistshares {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RemarketingListShare>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RemarketingListShare>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RemarketingListShare>,
       callback?: BodyResponseCallback<Schema$RemarketingListShare>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RemarketingListShare>,
       callback?: BodyResponseCallback<Schema$RemarketingListShare>):
       void|AxiosPromise<Schema$RemarketingListShare> {
@@ -25896,14 +25934,14 @@ export class Resource$Remarketinglistshares {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RemarketingListShare>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RemarketingListShare>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RemarketingListShare>,
       callback?: BodyResponseCallback<Schema$RemarketingListShare>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RemarketingListShare>,
       callback?: BodyResponseCallback<Schema$RemarketingListShare>):
       void|AxiosPromise<Schema$RemarketingListShare> {
@@ -26016,12 +26054,12 @@ export class Resource$Reports {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -26119,10 +26157,10 @@ export class Resource$Reports {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Report>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>):
       void|AxiosPromise<Schema$Report> {
     if (typeof options === 'function') {
@@ -26222,12 +26260,12 @@ export class Resource$Reports {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Report>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>):
       void|AxiosPromise<Schema$Report> {
     if (typeof options === 'function') {
@@ -26339,13 +26377,13 @@ export class Resource$Reports {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$ReportList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$ReportList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ReportList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ReportList>,
       callback?: BodyResponseCallback<Schema$ReportList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ReportList>,
       callback?: BodyResponseCallback<Schema$ReportList>):
       void|AxiosPromise<Schema$ReportList> {
@@ -26451,12 +26489,12 @@ export class Resource$Reports {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Report>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>):
       void|AxiosPromise<Schema$Report> {
     if (typeof options === 'function') {
@@ -26556,10 +26594,10 @@ export class Resource$Reports {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  run(params: any, options?: MethodOptions): AxiosPromise<Schema$File>;
-  run(params: any, options: MethodOptions|BodyResponseCallback<Schema$File>,
+  run(params?: any, options?: MethodOptions): AxiosPromise<Schema$File>;
+  run(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
       callback?: BodyResponseCallback<Schema$File>): void;
-  run(params: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
+  run(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
       callback?: BodyResponseCallback<Schema$File>):
       void|AxiosPromise<Schema$File> {
     if (typeof options === 'function') {
@@ -26665,12 +26703,12 @@ export class Resource$Reports {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Report>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>):
       void|AxiosPromise<Schema$Report> {
     if (typeof options === 'function') {
@@ -26781,14 +26819,14 @@ export class Resource$Reports$Compatiblefields {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  query(params: any, options?: MethodOptions):
+  query(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CompatibleFields>;
   query(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CompatibleFields>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CompatibleFields>,
       callback?: BodyResponseCallback<Schema$CompatibleFields>): void;
   query(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CompatibleFields>,
       callback?: BodyResponseCallback<Schema$CompatibleFields>):
       void|AxiosPromise<Schema$CompatibleFields> {
@@ -26908,10 +26946,10 @@ export class Resource$Reports$Files {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$File>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$File>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$File>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
       callback?: BodyResponseCallback<Schema$File>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
       callback?: BodyResponseCallback<Schema$File>):
       void|AxiosPromise<Schema$File> {
     if (typeof options === 'function') {
@@ -27027,12 +27065,13 @@ export class Resource$Reports$Files {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$FileList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$FileList>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$FileList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$FileList>,
       callback?: BodyResponseCallback<Schema$FileList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$FileList>,
       callback?: BodyResponseCallback<Schema$FileList>):
       void|AxiosPromise<Schema$FileList> {
@@ -27145,10 +27184,10 @@ export class Resource$Sites {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Site>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Site>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Site>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Site>,
       callback?: BodyResponseCallback<Schema$Site>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Site>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Site>,
       callback?: BodyResponseCallback<Schema$Site>):
       void|AxiosPromise<Schema$Site> {
     if (typeof options === 'function') {
@@ -27247,12 +27286,12 @@ export class Resource$Sites {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Site>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Site>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Site>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Site>,
       callback?: BodyResponseCallback<Schema$Site>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Site>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Site>,
       callback?: BodyResponseCallback<Schema$Site>):
       void|AxiosPromise<Schema$Site> {
     if (typeof options === 'function') {
@@ -27374,14 +27413,14 @@ export class Resource$Sites {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SitesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SitesListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SitesListResponse>,
       callback?: BodyResponseCallback<Schema$SitesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SitesListResponse>,
       callback?: BodyResponseCallback<Schema$SitesListResponse>):
       void|AxiosPromise<Schema$SitesListResponse> {
@@ -27486,12 +27525,12 @@ export class Resource$Sites {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Site>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Site>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Site>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Site>,
       callback?: BodyResponseCallback<Schema$Site>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Site>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Site>,
       callback?: BodyResponseCallback<Schema$Site>):
       void|AxiosPromise<Schema$Site> {
     if (typeof options === 'function') {
@@ -27591,12 +27630,12 @@ export class Resource$Sites {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Site>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Site>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Site>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Site>,
       callback?: BodyResponseCallback<Schema$Site>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Site>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Site>,
       callback?: BodyResponseCallback<Schema$Site>):
       void|AxiosPromise<Schema$Site> {
     if (typeof options === 'function') {
@@ -27705,10 +27744,10 @@ export class Resource$Sizes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Size>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Size>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Size>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Size>,
       callback?: BodyResponseCallback<Schema$Size>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Size>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Size>,
       callback?: BodyResponseCallback<Schema$Size>):
       void|AxiosPromise<Schema$Size> {
     if (typeof options === 'function') {
@@ -27807,12 +27846,12 @@ export class Resource$Sizes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Size>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Size>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Size>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Size>,
       callback?: BodyResponseCallback<Schema$Size>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Size>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Size>,
       callback?: BodyResponseCallback<Schema$Size>):
       void|AxiosPromise<Schema$Size> {
     if (typeof options === 'function') {
@@ -27909,14 +27948,14 @@ export class Resource$Sizes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SizesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SizesListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SizesListResponse>,
       callback?: BodyResponseCallback<Schema$SizesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SizesListResponse>,
       callback?: BodyResponseCallback<Schema$SizesListResponse>):
       void|AxiosPromise<Schema$SizesListResponse> {
@@ -28026,11 +28065,11 @@ export class Resource$Subaccounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Subaccount>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Subaccount>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Subaccount>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Subaccount>,
       callback?: BodyResponseCallback<Schema$Subaccount>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Subaccount>,
       callback?: BodyResponseCallback<Schema$Subaccount>):
       void|AxiosPromise<Schema$Subaccount> {
@@ -28131,13 +28170,14 @@ export class Resource$Subaccounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Subaccount>;
+  insert(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Subaccount>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Subaccount>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Subaccount>,
       callback?: BodyResponseCallback<Schema$Subaccount>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Subaccount>,
       callback?: BodyResponseCallback<Schema$Subaccount>):
       void|AxiosPromise<Schema$Subaccount> {
@@ -28253,15 +28293,15 @@ export class Resource$Subaccounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SubaccountsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SubaccountsListResponse>,
       callback?: BodyResponseCallback<Schema$SubaccountsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SubaccountsListResponse>,
       callback?: BodyResponseCallback<Schema$SubaccountsListResponse>):
@@ -28368,13 +28408,13 @@ export class Resource$Subaccounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Subaccount>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Subaccount>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Subaccount>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Subaccount>,
       callback?: BodyResponseCallback<Schema$Subaccount>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Subaccount>,
       callback?: BodyResponseCallback<Schema$Subaccount>):
       void|AxiosPromise<Schema$Subaccount> {
@@ -28476,13 +28516,14 @@ export class Resource$Subaccounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Subaccount>;
+  update(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Subaccount>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Subaccount>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Subaccount>,
       callback?: BodyResponseCallback<Schema$Subaccount>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Subaccount>,
       callback?: BodyResponseCallback<Schema$Subaccount>):
       void|AxiosPromise<Schema$Subaccount> {
@@ -28591,13 +28632,13 @@ export class Resource$Targetableremarketinglists {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$TargetableRemarketingList>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TargetableRemarketingList>,
       callback?: BodyResponseCallback<Schema$TargetableRemarketingList>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TargetableRemarketingList>,
       callback?: BodyResponseCallback<Schema$TargetableRemarketingList>):
@@ -28720,17 +28761,17 @@ export class Resource$Targetableremarketinglists {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetableRemarketingListsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TargetableRemarketingListsListResponse>,
       callback?:
           BodyResponseCallback<Schema$TargetableRemarketingListsListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TargetableRemarketingListsListResponse>,
       callback?:
@@ -28846,12 +28887,12 @@ export class Resource$Targetingtemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$TargetingTemplate>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetingTemplate>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetingTemplate>,
       callback?: BodyResponseCallback<Schema$TargetingTemplate>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetingTemplate>,
       callback?: BodyResponseCallback<Schema$TargetingTemplate>):
       void|AxiosPromise<Schema$TargetingTemplate> {
@@ -28952,14 +28993,14 @@ export class Resource$Targetingtemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetingTemplate>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetingTemplate>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetingTemplate>,
       callback?: BodyResponseCallback<Schema$TargetingTemplate>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetingTemplate>,
       callback?: BodyResponseCallback<Schema$TargetingTemplate>):
       void|AxiosPromise<Schema$TargetingTemplate> {
@@ -29077,16 +29118,16 @@ export class Resource$Targetingtemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetingTemplatesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TargetingTemplatesListResponse>,
       callback?: BodyResponseCallback<Schema$TargetingTemplatesListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TargetingTemplatesListResponse>,
       callback?: BodyResponseCallback<Schema$TargetingTemplatesListResponse>):
@@ -29197,14 +29238,14 @@ export class Resource$Targetingtemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetingTemplate>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetingTemplate>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetingTemplate>,
       callback?: BodyResponseCallback<Schema$TargetingTemplate>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetingTemplate>,
       callback?: BodyResponseCallback<Schema$TargetingTemplate>):
       void|AxiosPromise<Schema$TargetingTemplate> {
@@ -29307,14 +29348,14 @@ export class Resource$Targetingtemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetingTemplate>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetingTemplate>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetingTemplate>,
       callback?: BodyResponseCallback<Schema$TargetingTemplate>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetingTemplate>,
       callback?: BodyResponseCallback<Schema$TargetingTemplate>):
       void|AxiosPromise<Schema$TargetingTemplate> {
@@ -29423,11 +29464,11 @@ export class Resource$Userprofiles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$UserProfile>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UserProfile>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$UserProfile>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UserProfile>,
       callback?: BodyResponseCallback<Schema$UserProfile>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UserProfile>,
       callback?: BodyResponseCallback<Schema$UserProfile>):
       void|AxiosPromise<Schema$UserProfile> {
@@ -29518,14 +29559,14 @@ export class Resource$Userprofiles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$UserProfileList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UserProfileList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UserProfileList>,
       callback?: BodyResponseCallback<Schema$UserProfileList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UserProfileList>,
       callback?: BodyResponseCallback<Schema$UserProfileList>):
       void|AxiosPromise<Schema$UserProfileList> {
@@ -29633,13 +29674,13 @@ export class Resource$Userrolepermissiongroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$UserRolePermissionGroup>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$UserRolePermissionGroup>,
       callback?: BodyResponseCallback<Schema$UserRolePermissionGroup>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$UserRolePermissionGroup>,
       callback?: BodyResponseCallback<Schema$UserRolePermissionGroup>):
@@ -29734,17 +29775,17 @@ export class Resource$Userrolepermissiongroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$UserRolePermissionGroupsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$UserRolePermissionGroupsListResponse>,
       callback?:
           BodyResponseCallback<Schema$UserRolePermissionGroupsListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$UserRolePermissionGroupsListResponse>,
       callback?:
@@ -29860,12 +29901,12 @@ export class Resource$Userrolepermissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$UserRolePermission>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UserRolePermission>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UserRolePermission>,
       callback?: BodyResponseCallback<Schema$UserRolePermission>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UserRolePermission>,
       callback?: BodyResponseCallback<Schema$UserRolePermission>):
       void|AxiosPromise<Schema$UserRolePermission> {
@@ -29962,16 +30003,16 @@ export class Resource$Userrolepermissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$UserRolePermissionsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$UserRolePermissionsListResponse>,
       callback?: BodyResponseCallback<Schema$UserRolePermissionsListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$UserRolePermissionsListResponse>,
       callback?: BodyResponseCallback<Schema$UserRolePermissionsListResponse>):
@@ -30083,12 +30124,12 @@ export class Resource$Userroles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -30185,10 +30226,11 @@ export class Resource$Userroles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$UserRole>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$UserRole>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$UserRole>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UserRole>,
       callback?: BodyResponseCallback<Schema$UserRole>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UserRole>,
       callback?: BodyResponseCallback<Schema$UserRole>):
       void|AxiosPromise<Schema$UserRole> {
@@ -30288,12 +30330,13 @@ export class Resource$Userroles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$UserRole>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$UserRole>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$UserRole>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UserRole>,
       callback?: BodyResponseCallback<Schema$UserRole>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UserRole>,
       callback?: BodyResponseCallback<Schema$UserRole>):
       void|AxiosPromise<Schema$UserRole> {
@@ -30410,14 +30453,15 @@ export class Resource$Userroles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$UserRolesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UserRolesListResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$UserRolesListResponse>,
       callback?: BodyResponseCallback<Schema$UserRolesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$UserRolesListResponse>,
       callback?: BodyResponseCallback<Schema$UserRolesListResponse>):
@@ -30524,12 +30568,13 @@ export class Resource$Userroles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$UserRole>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$UserRole>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$UserRole>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UserRole>,
       callback?: BodyResponseCallback<Schema$UserRole>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UserRole>,
       callback?: BodyResponseCallback<Schema$UserRole>):
       void|AxiosPromise<Schema$UserRole> {
@@ -30631,12 +30676,13 @@ export class Resource$Userroles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$UserRole>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$UserRole>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$UserRole>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UserRole>,
       callback?: BodyResponseCallback<Schema$UserRole>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UserRole>,
       callback?: BodyResponseCallback<Schema$UserRole>):
       void|AxiosPromise<Schema$UserRole> {
@@ -30747,11 +30793,11 @@ export class Resource$Videoformats {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$VideoFormat>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$VideoFormat>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$VideoFormat>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$VideoFormat>,
       callback?: BodyResponseCallback<Schema$VideoFormat>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$VideoFormat>,
       callback?: BodyResponseCallback<Schema$VideoFormat>):
       void|AxiosPromise<Schema$VideoFormat> {
@@ -30847,15 +30893,15 @@ export class Resource$Videoformats {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$VideoFormatsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$VideoFormatsListResponse>,
       callback?: BodyResponseCallback<Schema$VideoFormatsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$VideoFormatsListResponse>,
       callback?: BodyResponseCallback<Schema$VideoFormatsListResponse>):
diff --git a/src/apis/dfareporting/v3.0.ts b/src/apis/dfareporting/v3.0.ts
index 7c0c8d6bc0..b65175d298 100644
--- a/src/apis/dfareporting/v3.0.ts
+++ b/src/apis/dfareporting/v3.0.ts
@@ -7498,13 +7498,13 @@ export class Resource$Accountactiveadsummaries {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$AccountActiveAdSummary>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AccountActiveAdSummary>,
       callback?: BodyResponseCallback<Schema$AccountActiveAdSummary>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AccountActiveAdSummary>,
       callback?: BodyResponseCallback<Schema$AccountActiveAdSummary>):
@@ -7567,13 +7567,13 @@ export class Resource$Accountpermissiongroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$AccountPermissionGroup>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AccountPermissionGroup>,
       callback?: BodyResponseCallback<Schema$AccountPermissionGroup>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AccountPermissionGroup>,
       callback?: BodyResponseCallback<Schema$AccountPermissionGroup>):
@@ -7623,17 +7623,17 @@ export class Resource$Accountpermissiongroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AccountPermissionGroupsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AccountPermissionGroupsListResponse>,
       callback?:
           BodyResponseCallback<Schema$AccountPermissionGroupsListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AccountPermissionGroupsListResponse>,
       callback?:
@@ -7699,12 +7699,12 @@ export class Resource$Accountpermissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$AccountPermission>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AccountPermission>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AccountPermission>,
       callback?: BodyResponseCallback<Schema$AccountPermission>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AccountPermission>,
       callback?: BodyResponseCallback<Schema$AccountPermission>):
       void|AxiosPromise<Schema$AccountPermission> {
@@ -7753,16 +7753,16 @@ export class Resource$Accountpermissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AccountPermissionsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AccountPermissionsListResponse>,
       callback?: BodyResponseCallback<Schema$AccountPermissionsListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AccountPermissionsListResponse>,
       callback?: BodyResponseCallback<Schema$AccountPermissionsListResponse>):
@@ -7827,10 +7827,12 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Account>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Account>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>):
       void|AxiosPromise<Schema$Account> {
     if (typeof options === 'function') {
@@ -7885,14 +7887,14 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AccountsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AccountsListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AccountsListResponse>,
       callback?: BodyResponseCallback<Schema$AccountsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AccountsListResponse>,
       callback?: BodyResponseCallback<Schema$AccountsListResponse>):
       void|AxiosPromise<Schema$AccountsListResponse> {
@@ -7942,12 +7944,14 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Account>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Account>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>):
       void|AxiosPromise<Schema$Account> {
     if (typeof options === 'function') {
@@ -7995,12 +7999,14 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Account>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Account>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>):
       void|AxiosPromise<Schema$Account> {
     if (typeof options === 'function') {
@@ -8060,12 +8066,12 @@ export class Resource$Accountuserprofiles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$AccountUserProfile>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AccountUserProfile>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AccountUserProfile>,
       callback?: BodyResponseCallback<Schema$AccountUserProfile>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AccountUserProfile>,
       callback?: BodyResponseCallback<Schema$AccountUserProfile>):
       void|AxiosPromise<Schema$AccountUserProfile> {
@@ -8115,14 +8121,14 @@ export class Resource$Accountuserprofiles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AccountUserProfile>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AccountUserProfile>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AccountUserProfile>,
       callback?: BodyResponseCallback<Schema$AccountUserProfile>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AccountUserProfile>,
       callback?: BodyResponseCallback<Schema$AccountUserProfile>):
       void|AxiosPromise<Schema$AccountUserProfile> {
@@ -8181,16 +8187,16 @@ export class Resource$Accountuserprofiles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AccountUserProfilesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AccountUserProfilesListResponse>,
       callback?: BodyResponseCallback<Schema$AccountUserProfilesListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AccountUserProfilesListResponse>,
       callback?: BodyResponseCallback<Schema$AccountUserProfilesListResponse>):
@@ -8245,14 +8251,14 @@ export class Resource$Accountuserprofiles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AccountUserProfile>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AccountUserProfile>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AccountUserProfile>,
       callback?: BodyResponseCallback<Schema$AccountUserProfile>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AccountUserProfile>,
       callback?: BodyResponseCallback<Schema$AccountUserProfile>):
       void|AxiosPromise<Schema$AccountUserProfile> {
@@ -8302,14 +8308,14 @@ export class Resource$Accountuserprofiles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AccountUserProfile>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AccountUserProfile>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AccountUserProfile>,
       callback?: BodyResponseCallback<Schema$AccountUserProfile>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AccountUserProfile>,
       callback?: BodyResponseCallback<Schema$AccountUserProfile>):
       void|AxiosPromise<Schema$AccountUserProfile> {
@@ -8371,10 +8377,10 @@ export class Resource$Ads {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Ad>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Ad>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Ad>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Ad>,
       callback?: BodyResponseCallback<Schema$Ad>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Ad>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Ad>,
       callback?: BodyResponseCallback<Schema$Ad>):
       void|AxiosPromise<Schema$Ad> {
     if (typeof options === 'function') {
@@ -8422,12 +8428,12 @@ export class Resource$Ads {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Ad>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Ad>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Ad>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Ad>,
       callback?: BodyResponseCallback<Schema$Ad>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Ad>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Ad>,
       callback?: BodyResponseCallback<Schema$Ad>):
       void|AxiosPromise<Schema$Ad> {
     if (typeof options === 'function') {
@@ -8497,14 +8503,14 @@ export class Resource$Ads {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AdsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AdsListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AdsListResponse>,
       callback?: BodyResponseCallback<Schema$AdsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AdsListResponse>,
       callback?: BodyResponseCallback<Schema$AdsListResponse>):
       void|AxiosPromise<Schema$AdsListResponse> {
@@ -8553,12 +8559,12 @@ export class Resource$Ads {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Ad>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Ad>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Ad>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Ad>,
       callback?: BodyResponseCallback<Schema$Ad>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Ad>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Ad>,
       callback?: BodyResponseCallback<Schema$Ad>):
       void|AxiosPromise<Schema$Ad> {
     if (typeof options === 'function') {
@@ -8605,12 +8611,12 @@ export class Resource$Ads {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Ad>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Ad>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Ad>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Ad>,
       callback?: BodyResponseCallback<Schema$Ad>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Ad>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Ad>,
       callback?: BodyResponseCallback<Schema$Ad>):
       void|AxiosPromise<Schema$Ad> {
     if (typeof options === 'function') {
@@ -8669,12 +8675,12 @@ export class Resource$Advertisergroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -8722,12 +8728,12 @@ export class Resource$Advertisergroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$AdvertiserGroup>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AdvertiserGroup>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AdvertiserGroup>,
       callback?: BodyResponseCallback<Schema$AdvertiserGroup>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AdvertiserGroup>,
       callback?: BodyResponseCallback<Schema$AdvertiserGroup>):
       void|AxiosPromise<Schema$AdvertiserGroup> {
@@ -8777,14 +8783,14 @@ export class Resource$Advertisergroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AdvertiserGroup>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AdvertiserGroup>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AdvertiserGroup>,
       callback?: BodyResponseCallback<Schema$AdvertiserGroup>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AdvertiserGroup>,
       callback?: BodyResponseCallback<Schema$AdvertiserGroup>):
       void|AxiosPromise<Schema$AdvertiserGroup> {
@@ -8840,16 +8846,16 @@ export class Resource$Advertisergroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AdvertiserGroupsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AdvertiserGroupsListResponse>,
       callback?: BodyResponseCallback<Schema$AdvertiserGroupsListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AdvertiserGroupsListResponse>,
       callback?: BodyResponseCallback<Schema$AdvertiserGroupsListResponse>):
@@ -8903,14 +8909,14 @@ export class Resource$Advertisergroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AdvertiserGroup>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AdvertiserGroup>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AdvertiserGroup>,
       callback?: BodyResponseCallback<Schema$AdvertiserGroup>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AdvertiserGroup>,
       callback?: BodyResponseCallback<Schema$AdvertiserGroup>):
       void|AxiosPromise<Schema$AdvertiserGroup> {
@@ -8960,14 +8966,14 @@ export class Resource$Advertisergroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AdvertiserGroup>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AdvertiserGroup>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AdvertiserGroup>,
       callback?: BodyResponseCallback<Schema$AdvertiserGroup>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AdvertiserGroup>,
       callback?: BodyResponseCallback<Schema$AdvertiserGroup>):
       void|AxiosPromise<Schema$AdvertiserGroup> {
@@ -9029,11 +9035,11 @@ export class Resource$Advertiserlandingpages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$LandingPage>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LandingPage>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$LandingPage>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LandingPage>,
       callback?: BodyResponseCallback<Schema$LandingPage>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LandingPage>,
       callback?: BodyResponseCallback<Schema$LandingPage>):
       void|AxiosPromise<Schema$LandingPage> {
@@ -9083,14 +9089,14 @@ export class Resource$Advertiserlandingpages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LandingPage>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LandingPage>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LandingPage>,
       callback?: BodyResponseCallback<Schema$LandingPage>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LandingPage>,
       callback?: BodyResponseCallback<Schema$LandingPage>):
       void|AxiosPromise<Schema$LandingPage> {
@@ -9148,17 +9154,17 @@ export class Resource$Advertiserlandingpages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AdvertiserLandingPagesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AdvertiserLandingPagesListResponse>,
       callback?:
           BodyResponseCallback<Schema$AdvertiserLandingPagesListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AdvertiserLandingPagesListResponse>,
       callback?:
@@ -9214,13 +9220,14 @@ export class Resource$Advertiserlandingpages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$LandingPage>;
+  patch(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$LandingPage>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LandingPage>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LandingPage>,
       callback?: BodyResponseCallback<Schema$LandingPage>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LandingPage>,
       callback?: BodyResponseCallback<Schema$LandingPage>):
       void|AxiosPromise<Schema$LandingPage> {
@@ -9270,14 +9277,14 @@ export class Resource$Advertiserlandingpages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LandingPage>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LandingPage>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LandingPage>,
       callback?: BodyResponseCallback<Schema$LandingPage>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LandingPage>,
       callback?: BodyResponseCallback<Schema$LandingPage>):
       void|AxiosPromise<Schema$LandingPage> {
@@ -9339,11 +9346,11 @@ export class Resource$Advertisers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Advertiser>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Advertiser>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Advertiser>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Advertiser>,
       callback?: BodyResponseCallback<Schema$Advertiser>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Advertiser>,
       callback?: BodyResponseCallback<Schema$Advertiser>):
       void|AxiosPromise<Schema$Advertiser> {
@@ -9393,13 +9400,14 @@ export class Resource$Advertisers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Advertiser>;
+  insert(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Advertiser>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Advertiser>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Advertiser>,
       callback?: BodyResponseCallback<Schema$Advertiser>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Advertiser>,
       callback?: BodyResponseCallback<Schema$Advertiser>):
       void|AxiosPromise<Schema$Advertiser> {
@@ -9460,15 +9468,15 @@ export class Resource$Advertisers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AdvertisersListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AdvertisersListResponse>,
       callback?: BodyResponseCallback<Schema$AdvertisersListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AdvertisersListResponse>,
       callback?: BodyResponseCallback<Schema$AdvertisersListResponse>):
@@ -9519,13 +9527,13 @@ export class Resource$Advertisers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Advertiser>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Advertiser>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Advertiser>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Advertiser>,
       callback?: BodyResponseCallback<Schema$Advertiser>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Advertiser>,
       callback?: BodyResponseCallback<Schema$Advertiser>):
       void|AxiosPromise<Schema$Advertiser> {
@@ -9574,13 +9582,14 @@ export class Resource$Advertisers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Advertiser>;
+  update(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Advertiser>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Advertiser>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Advertiser>,
       callback?: BodyResponseCallback<Schema$Advertiser>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Advertiser>,
       callback?: BodyResponseCallback<Schema$Advertiser>):
       void|AxiosPromise<Schema$Advertiser> {
@@ -9640,14 +9649,14 @@ export class Resource$Browsers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BrowsersListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BrowsersListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BrowsersListResponse>,
       callback?: BodyResponseCallback<Schema$BrowsersListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BrowsersListResponse>,
       callback?: BodyResponseCallback<Schema$BrowsersListResponse>):
       void|AxiosPromise<Schema$BrowsersListResponse> {
@@ -9711,16 +9720,16 @@ export class Resource$Campaigncreativeassociations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CampaignCreativeAssociation>;
   insert(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$CampaignCreativeAssociation>,
       callback?: BodyResponseCallback<Schema$CampaignCreativeAssociation>):
       void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$CampaignCreativeAssociation>,
       callback?: BodyResponseCallback<Schema$CampaignCreativeAssociation>):
@@ -9776,16 +9785,16 @@ export class Resource$Campaigncreativeassociations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CampaignCreativeAssociationsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$CampaignCreativeAssociationsListResponse>,
       callback?: BodyResponseCallback<
           Schema$CampaignCreativeAssociationsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$CampaignCreativeAssociationsListResponse>,
       callback?: BodyResponseCallback<
@@ -9851,10 +9860,11 @@ export class Resource$Campaigns {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Campaign>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Campaign>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Campaign>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Campaign>,
       callback?: BodyResponseCallback<Schema$Campaign>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Campaign>,
       callback?: BodyResponseCallback<Schema$Campaign>):
       void|AxiosPromise<Schema$Campaign> {
@@ -9903,12 +9913,13 @@ export class Resource$Campaigns {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Campaign>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Campaign>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Campaign>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Campaign>,
       callback?: BodyResponseCallback<Schema$Campaign>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Campaign>,
       callback?: BodyResponseCallback<Schema$Campaign>):
       void|AxiosPromise<Schema$Campaign> {
@@ -9970,14 +9981,15 @@ export class Resource$Campaigns {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CampaignsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CampaignsListResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$CampaignsListResponse>,
       callback?: BodyResponseCallback<Schema$CampaignsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$CampaignsListResponse>,
       callback?: BodyResponseCallback<Schema$CampaignsListResponse>):
@@ -10028,12 +10040,13 @@ export class Resource$Campaigns {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Campaign>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Campaign>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Campaign>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Campaign>,
       callback?: BodyResponseCallback<Schema$Campaign>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Campaign>,
       callback?: BodyResponseCallback<Schema$Campaign>):
       void|AxiosPromise<Schema$Campaign> {
@@ -10082,12 +10095,13 @@ export class Resource$Campaigns {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Campaign>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Campaign>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Campaign>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Campaign>,
       callback?: BodyResponseCallback<Schema$Campaign>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Campaign>,
       callback?: BodyResponseCallback<Schema$Campaign>):
       void|AxiosPromise<Schema$Campaign> {
@@ -10148,11 +10162,11 @@ export class Resource$Changelogs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$ChangeLog>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ChangeLog>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$ChangeLog>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ChangeLog>,
       callback?: BodyResponseCallback<Schema$ChangeLog>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ChangeLog>,
       callback?: BodyResponseCallback<Schema$ChangeLog>):
       void|AxiosPromise<Schema$ChangeLog> {
@@ -10210,15 +10224,15 @@ export class Resource$Changelogs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ChangeLogsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ChangeLogsListResponse>,
       callback?: BodyResponseCallback<Schema$ChangeLogsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ChangeLogsListResponse>,
       callback?: BodyResponseCallback<Schema$ChangeLogsListResponse>):
@@ -10283,14 +10297,14 @@ export class Resource$Cities {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CitiesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CitiesListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CitiesListResponse>,
       callback?: BodyResponseCallback<Schema$CitiesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CitiesListResponse>,
       callback?: BodyResponseCallback<Schema$CitiesListResponse>):
       void|AxiosPromise<Schema$CitiesListResponse> {
@@ -10351,12 +10365,12 @@ export class Resource$Connectiontypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$ConnectionType>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ConnectionType>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ConnectionType>,
       callback?: BodyResponseCallback<Schema$ConnectionType>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ConnectionType>,
       callback?: BodyResponseCallback<Schema$ConnectionType>):
       void|AxiosPromise<Schema$ConnectionType> {
@@ -10405,16 +10419,16 @@ export class Resource$Connectiontypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ConnectionTypesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ConnectionTypesListResponse>,
       callback?: BodyResponseCallback<Schema$ConnectionTypesListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ConnectionTypesListResponse>,
       callback?: BodyResponseCallback<Schema$ConnectionTypesListResponse>):
@@ -10477,12 +10491,12 @@ export class Resource$Contentcategories {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -10530,12 +10544,12 @@ export class Resource$Contentcategories {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$ContentCategory>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ContentCategory>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ContentCategory>,
       callback?: BodyResponseCallback<Schema$ContentCategory>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ContentCategory>,
       callback?: BodyResponseCallback<Schema$ContentCategory>):
       void|AxiosPromise<Schema$ContentCategory> {
@@ -10585,14 +10599,14 @@ export class Resource$Contentcategories {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ContentCategory>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ContentCategory>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ContentCategory>,
       callback?: BodyResponseCallback<Schema$ContentCategory>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ContentCategory>,
       callback?: BodyResponseCallback<Schema$ContentCategory>):
       void|AxiosPromise<Schema$ContentCategory> {
@@ -10648,16 +10662,16 @@ export class Resource$Contentcategories {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ContentCategoriesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ContentCategoriesListResponse>,
       callback?: BodyResponseCallback<Schema$ContentCategoriesListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ContentCategoriesListResponse>,
       callback?: BodyResponseCallback<Schema$ContentCategoriesListResponse>):
@@ -10711,14 +10725,14 @@ export class Resource$Contentcategories {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ContentCategory>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ContentCategory>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ContentCategory>,
       callback?: BodyResponseCallback<Schema$ContentCategory>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ContentCategory>,
       callback?: BodyResponseCallback<Schema$ContentCategory>):
       void|AxiosPromise<Schema$ContentCategory> {
@@ -10768,14 +10782,14 @@ export class Resource$Contentcategories {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ContentCategory>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ContentCategory>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ContentCategory>,
       callback?: BodyResponseCallback<Schema$ContentCategory>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ContentCategory>,
       callback?: BodyResponseCallback<Schema$ContentCategory>):
       void|AxiosPromise<Schema$ContentCategory> {
@@ -10837,16 +10851,16 @@ export class Resource$Conversions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchinsert(params: any, options?: MethodOptions):
+  batchinsert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ConversionsBatchInsertResponse>;
   batchinsert(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ConversionsBatchInsertResponse>,
       callback?: BodyResponseCallback<Schema$ConversionsBatchInsertResponse>):
       void;
   batchinsert(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ConversionsBatchInsertResponse>,
       callback?: BodyResponseCallback<Schema$ConversionsBatchInsertResponse>):
@@ -10899,16 +10913,16 @@ export class Resource$Conversions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchupdate(params: any, options?: MethodOptions):
+  batchupdate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ConversionsBatchUpdateResponse>;
   batchupdate(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ConversionsBatchUpdateResponse>,
       callback?: BodyResponseCallback<Schema$ConversionsBatchUpdateResponse>):
       void;
   batchupdate(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ConversionsBatchUpdateResponse>,
       callback?: BodyResponseCallback<Schema$ConversionsBatchUpdateResponse>):
@@ -10973,10 +10987,12 @@ export class Resource$Countries {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Country>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Country>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Country>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Country>,
       callback?: BodyResponseCallback<Schema$Country>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Country>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Country>,
       callback?: BodyResponseCallback<Schema$Country>):
       void|AxiosPromise<Schema$Country> {
     if (typeof options === 'function') {
@@ -11024,14 +11040,15 @@ export class Resource$Countries {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CountriesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CountriesListResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$CountriesListResponse>,
       callback?: BodyResponseCallback<Schema$CountriesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$CountriesListResponse>,
       callback?: BodyResponseCallback<Schema$CountriesListResponse>):
@@ -11097,14 +11114,15 @@ export class Resource$Creativeassets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreativeAssetMetadata>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CreativeAssetMetadata>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$CreativeAssetMetadata>,
       callback?: BodyResponseCallback<Schema$CreativeAssetMetadata>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$CreativeAssetMetadata>,
       callback?: BodyResponseCallback<Schema$CreativeAssetMetadata>):
@@ -11171,12 +11189,12 @@ export class Resource$Creativefields {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -11224,11 +11242,12 @@ export class Resource$Creativefields {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$CreativeField>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CreativeField>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$CreativeField>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CreativeField>,
       callback?: BodyResponseCallback<Schema$CreativeField>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CreativeField>,
       callback?: BodyResponseCallback<Schema$CreativeField>):
       void|AxiosPromise<Schema$CreativeField> {
@@ -11278,14 +11297,14 @@ export class Resource$Creativefields {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreativeField>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CreativeField>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CreativeField>,
       callback?: BodyResponseCallback<Schema$CreativeField>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CreativeField>,
       callback?: BodyResponseCallback<Schema$CreativeField>):
       void|AxiosPromise<Schema$CreativeField> {
@@ -11341,15 +11360,15 @@ export class Resource$Creativefields {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreativeFieldsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$CreativeFieldsListResponse>,
       callback?: BodyResponseCallback<Schema$CreativeFieldsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$CreativeFieldsListResponse>,
       callback?: BodyResponseCallback<Schema$CreativeFieldsListResponse>):
@@ -11401,14 +11420,14 @@ export class Resource$Creativefields {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreativeField>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CreativeField>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CreativeField>,
       callback?: BodyResponseCallback<Schema$CreativeField>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CreativeField>,
       callback?: BodyResponseCallback<Schema$CreativeField>):
       void|AxiosPromise<Schema$CreativeField> {
@@ -11457,14 +11476,14 @@ export class Resource$Creativefields {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreativeField>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CreativeField>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CreativeField>,
       callback?: BodyResponseCallback<Schema$CreativeField>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CreativeField>,
       callback?: BodyResponseCallback<Schema$CreativeField>):
       void|AxiosPromise<Schema$CreativeField> {
@@ -11526,12 +11545,12 @@ export class Resource$Creativefieldvalues {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -11580,12 +11599,12 @@ export class Resource$Creativefieldvalues {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$CreativeFieldValue>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CreativeFieldValue>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CreativeFieldValue>,
       callback?: BodyResponseCallback<Schema$CreativeFieldValue>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CreativeFieldValue>,
       callback?: BodyResponseCallback<Schema$CreativeFieldValue>):
       void|AxiosPromise<Schema$CreativeFieldValue> {
@@ -11636,14 +11655,14 @@ export class Resource$Creativefieldvalues {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreativeFieldValue>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CreativeFieldValue>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CreativeFieldValue>,
       callback?: BodyResponseCallback<Schema$CreativeFieldValue>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CreativeFieldValue>,
       callback?: BodyResponseCallback<Schema$CreativeFieldValue>):
       void|AxiosPromise<Schema$CreativeFieldValue> {
@@ -11700,16 +11719,16 @@ export class Resource$Creativefieldvalues {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreativeFieldValuesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$CreativeFieldValuesListResponse>,
       callback?: BodyResponseCallback<Schema$CreativeFieldValuesListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$CreativeFieldValuesListResponse>,
       callback?: BodyResponseCallback<Schema$CreativeFieldValuesListResponse>):
@@ -11765,14 +11784,14 @@ export class Resource$Creativefieldvalues {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreativeFieldValue>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CreativeFieldValue>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CreativeFieldValue>,
       callback?: BodyResponseCallback<Schema$CreativeFieldValue>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CreativeFieldValue>,
       callback?: BodyResponseCallback<Schema$CreativeFieldValue>):
       void|AxiosPromise<Schema$CreativeFieldValue> {
@@ -11823,14 +11842,14 @@ export class Resource$Creativefieldvalues {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreativeFieldValue>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CreativeFieldValue>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CreativeFieldValue>,
       callback?: BodyResponseCallback<Schema$CreativeFieldValue>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CreativeFieldValue>,
       callback?: BodyResponseCallback<Schema$CreativeFieldValue>):
       void|AxiosPromise<Schema$CreativeFieldValue> {
@@ -11892,11 +11911,12 @@ export class Resource$Creativegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$CreativeGroup>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CreativeGroup>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$CreativeGroup>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CreativeGroup>,
       callback?: BodyResponseCallback<Schema$CreativeGroup>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CreativeGroup>,
       callback?: BodyResponseCallback<Schema$CreativeGroup>):
       void|AxiosPromise<Schema$CreativeGroup> {
@@ -11946,14 +11966,14 @@ export class Resource$Creativegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreativeGroup>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CreativeGroup>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CreativeGroup>,
       callback?: BodyResponseCallback<Schema$CreativeGroup>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CreativeGroup>,
       callback?: BodyResponseCallback<Schema$CreativeGroup>):
       void|AxiosPromise<Schema$CreativeGroup> {
@@ -12010,15 +12030,15 @@ export class Resource$Creativegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreativeGroupsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$CreativeGroupsListResponse>,
       callback?: BodyResponseCallback<Schema$CreativeGroupsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$CreativeGroupsListResponse>,
       callback?: BodyResponseCallback<Schema$CreativeGroupsListResponse>):
@@ -12070,14 +12090,14 @@ export class Resource$Creativegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreativeGroup>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CreativeGroup>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CreativeGroup>,
       callback?: BodyResponseCallback<Schema$CreativeGroup>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CreativeGroup>,
       callback?: BodyResponseCallback<Schema$CreativeGroup>):
       void|AxiosPromise<Schema$CreativeGroup> {
@@ -12126,14 +12146,14 @@ export class Resource$Creativegroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreativeGroup>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CreativeGroup>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CreativeGroup>,
       callback?: BodyResponseCallback<Schema$CreativeGroup>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CreativeGroup>,
       callback?: BodyResponseCallback<Schema$CreativeGroup>):
       void|AxiosPromise<Schema$CreativeGroup> {
@@ -12194,10 +12214,11 @@ export class Resource$Creatives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Creative>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Creative>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Creative>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Creative>,
       callback?: BodyResponseCallback<Schema$Creative>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Creative>,
       callback?: BodyResponseCallback<Schema$Creative>):
       void|AxiosPromise<Schema$Creative> {
@@ -12246,12 +12267,13 @@ export class Resource$Creatives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Creative>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Creative>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Creative>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Creative>,
       callback?: BodyResponseCallback<Schema$Creative>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Creative>,
       callback?: BodyResponseCallback<Schema$Creative>):
       void|AxiosPromise<Schema$Creative> {
@@ -12316,14 +12338,15 @@ export class Resource$Creatives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreativesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CreativesListResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$CreativesListResponse>,
       callback?: BodyResponseCallback<Schema$CreativesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$CreativesListResponse>,
       callback?: BodyResponseCallback<Schema$CreativesListResponse>):
@@ -12374,12 +12397,13 @@ export class Resource$Creatives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Creative>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Creative>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Creative>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Creative>,
       callback?: BodyResponseCallback<Schema$Creative>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Creative>,
       callback?: BodyResponseCallback<Schema$Creative>):
       void|AxiosPromise<Schema$Creative> {
@@ -12428,12 +12452,13 @@ export class Resource$Creatives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Creative>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Creative>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Creative>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Creative>,
       callback?: BodyResponseCallback<Schema$Creative>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Creative>,
       callback?: BodyResponseCallback<Schema$Creative>):
       void|AxiosPromise<Schema$Creative> {
@@ -12496,14 +12521,14 @@ export class Resource$Dimensionvalues {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  query(params: any, options?: MethodOptions):
+  query(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DimensionValueList>;
   query(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DimensionValueList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DimensionValueList>,
       callback?: BodyResponseCallback<Schema$DimensionValueList>): void;
   query(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DimensionValueList>,
       callback?: BodyResponseCallback<Schema$DimensionValueList>):
       void|AxiosPromise<Schema$DimensionValueList> {
@@ -12565,12 +12590,12 @@ export class Resource$Directorysitecontacts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$DirectorySiteContact>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DirectorySiteContact>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DirectorySiteContact>,
       callback?: BodyResponseCallback<Schema$DirectorySiteContact>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DirectorySiteContact>,
       callback?: BodyResponseCallback<Schema$DirectorySiteContact>):
       void|AxiosPromise<Schema$DirectorySiteContact> {
@@ -12627,16 +12652,16 @@ export class Resource$Directorysitecontacts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DirectorySiteContactsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$DirectorySiteContactsListResponse>,
       callback?:
           BodyResponseCallback<Schema$DirectorySiteContactsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$DirectorySiteContactsListResponse>,
       callback?:
@@ -12702,11 +12727,12 @@ export class Resource$Directorysites {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$DirectorySite>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DirectorySite>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$DirectorySite>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DirectorySite>,
       callback?: BodyResponseCallback<Schema$DirectorySite>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DirectorySite>,
       callback?: BodyResponseCallback<Schema$DirectorySite>):
       void|AxiosPromise<Schema$DirectorySite> {
@@ -12756,14 +12782,14 @@ export class Resource$Directorysites {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DirectorySite>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DirectorySite>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DirectorySite>,
       callback?: BodyResponseCallback<Schema$DirectorySite>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DirectorySite>,
       callback?: BodyResponseCallback<Schema$DirectorySite>):
       void|AxiosPromise<Schema$DirectorySite> {
@@ -12825,15 +12851,15 @@ export class Resource$Directorysites {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DirectorySitesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$DirectorySitesListResponse>,
       callback?: BodyResponseCallback<Schema$DirectorySitesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$DirectorySitesListResponse>,
       callback?: BodyResponseCallback<Schema$DirectorySitesListResponse>):
@@ -12897,12 +12923,12 @@ export class Resource$Dynamictargetingkeys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -12953,14 +12979,14 @@ export class Resource$Dynamictargetingkeys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DynamicTargetingKey>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DynamicTargetingKey>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DynamicTargetingKey>,
       callback?: BodyResponseCallback<Schema$DynamicTargetingKey>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DynamicTargetingKey>,
       callback?: BodyResponseCallback<Schema$DynamicTargetingKey>):
       void|AxiosPromise<Schema$DynamicTargetingKey> {
@@ -13013,16 +13039,16 @@ export class Resource$Dynamictargetingkeys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DynamicTargetingKeysListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$DynamicTargetingKeysListResponse>,
       callback?: BodyResponseCallback<Schema$DynamicTargetingKeysListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$DynamicTargetingKeysListResponse>,
       callback?: BodyResponseCallback<Schema$DynamicTargetingKeysListResponse>):
@@ -13087,12 +13113,12 @@ export class Resource$Eventtags {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -13139,10 +13165,11 @@ export class Resource$Eventtags {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$EventTag>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$EventTag>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$EventTag>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$EventTag>,
       callback?: BodyResponseCallback<Schema$EventTag>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$EventTag>,
       callback?: BodyResponseCallback<Schema$EventTag>):
       void|AxiosPromise<Schema$EventTag> {
@@ -13191,12 +13218,13 @@ export class Resource$Eventtags {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$EventTag>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$EventTag>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$EventTag>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$EventTag>,
       callback?: BodyResponseCallback<Schema$EventTag>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$EventTag>,
       callback?: BodyResponseCallback<Schema$EventTag>):
       void|AxiosPromise<Schema$EventTag> {
@@ -13254,14 +13282,15 @@ export class Resource$Eventtags {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$EventTagsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$EventTagsListResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$EventTagsListResponse>,
       callback?: BodyResponseCallback<Schema$EventTagsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$EventTagsListResponse>,
       callback?: BodyResponseCallback<Schema$EventTagsListResponse>):
@@ -13312,12 +13341,13 @@ export class Resource$Eventtags {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$EventTag>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$EventTag>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$EventTag>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$EventTag>,
       callback?: BodyResponseCallback<Schema$EventTag>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$EventTag>,
       callback?: BodyResponseCallback<Schema$EventTag>):
       void|AxiosPromise<Schema$EventTag> {
@@ -13366,12 +13396,13 @@ export class Resource$Eventtags {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$EventTag>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$EventTag>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$EventTag>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$EventTag>,
       callback?: BodyResponseCallback<Schema$EventTag>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$EventTag>,
       callback?: BodyResponseCallback<Schema$EventTag>):
       void|AxiosPromise<Schema$EventTag> {
@@ -13433,10 +13464,10 @@ export class Resource$Files {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$File>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$File>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$File>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
       callback?: BodyResponseCallback<Schema$File>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
       callback?: BodyResponseCallback<Schema$File>):
       void|AxiosPromise<Schema$File> {
     if (typeof options === 'function') {
@@ -13488,12 +13519,13 @@ export class Resource$Files {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$FileList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$FileList>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$FileList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$FileList>,
       callback?: BodyResponseCallback<Schema$FileList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$FileList>,
       callback?: BodyResponseCallback<Schema$FileList>):
       void|AxiosPromise<Schema$FileList> {
@@ -13553,12 +13585,12 @@ export class Resource$Floodlightactivities {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -13606,17 +13638,17 @@ export class Resource$Floodlightactivities {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  generatetag(params: any, options?: MethodOptions):
+  generatetag(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FloodlightActivitiesGenerateTagResponse>;
   generatetag(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightActivitiesGenerateTagResponse>,
       callback?:
           BodyResponseCallback<Schema$FloodlightActivitiesGenerateTagResponse>):
       void;
   generatetag(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightActivitiesGenerateTagResponse>,
       callback?:
@@ -13670,12 +13702,12 @@ export class Resource$Floodlightactivities {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$FloodlightActivity>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$FloodlightActivity>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$FloodlightActivity>,
       callback?: BodyResponseCallback<Schema$FloodlightActivity>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$FloodlightActivity>,
       callback?: BodyResponseCallback<Schema$FloodlightActivity>):
       void|AxiosPromise<Schema$FloodlightActivity> {
@@ -13725,14 +13757,14 @@ export class Resource$Floodlightactivities {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FloodlightActivity>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$FloodlightActivity>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$FloodlightActivity>,
       callback?: BodyResponseCallback<Schema$FloodlightActivity>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$FloodlightActivity>,
       callback?: BodyResponseCallback<Schema$FloodlightActivity>):
       void|AxiosPromise<Schema$FloodlightActivity> {
@@ -13795,16 +13827,16 @@ export class Resource$Floodlightactivities {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FloodlightActivitiesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightActivitiesListResponse>,
       callback?: BodyResponseCallback<Schema$FloodlightActivitiesListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightActivitiesListResponse>,
       callback?: BodyResponseCallback<Schema$FloodlightActivitiesListResponse>):
@@ -13859,14 +13891,14 @@ export class Resource$Floodlightactivities {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FloodlightActivity>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$FloodlightActivity>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$FloodlightActivity>,
       callback?: BodyResponseCallback<Schema$FloodlightActivity>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$FloodlightActivity>,
       callback?: BodyResponseCallback<Schema$FloodlightActivity>):
       void|AxiosPromise<Schema$FloodlightActivity> {
@@ -13916,14 +13948,14 @@ export class Resource$Floodlightactivities {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FloodlightActivity>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$FloodlightActivity>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$FloodlightActivity>,
       callback?: BodyResponseCallback<Schema$FloodlightActivity>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$FloodlightActivity>,
       callback?: BodyResponseCallback<Schema$FloodlightActivity>):
       void|AxiosPromise<Schema$FloodlightActivity> {
@@ -13985,13 +14017,13 @@ export class Resource$Floodlightactivitygroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$FloodlightActivityGroup>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightActivityGroup>,
       callback?: BodyResponseCallback<Schema$FloodlightActivityGroup>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightActivityGroup>,
       callback?: BodyResponseCallback<Schema$FloodlightActivityGroup>):
@@ -14042,15 +14074,15 @@ export class Resource$Floodlightactivitygroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FloodlightActivityGroup>;
   insert(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightActivityGroup>,
       callback?: BodyResponseCallback<Schema$FloodlightActivityGroup>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightActivityGroup>,
       callback?: BodyResponseCallback<Schema$FloodlightActivityGroup>):
@@ -14110,17 +14142,17 @@ export class Resource$Floodlightactivitygroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FloodlightActivityGroupsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightActivityGroupsListResponse>,
       callback?:
           BodyResponseCallback<Schema$FloodlightActivityGroupsListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightActivityGroupsListResponse>,
       callback?:
@@ -14176,15 +14208,15 @@ export class Resource$Floodlightactivitygroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FloodlightActivityGroup>;
   patch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightActivityGroup>,
       callback?: BodyResponseCallback<Schema$FloodlightActivityGroup>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightActivityGroup>,
       callback?: BodyResponseCallback<Schema$FloodlightActivityGroup>):
@@ -14235,15 +14267,15 @@ export class Resource$Floodlightactivitygroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FloodlightActivityGroup>;
   update(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightActivityGroup>,
       callback?: BodyResponseCallback<Schema$FloodlightActivityGroup>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightActivityGroup>,
       callback?: BodyResponseCallback<Schema$FloodlightActivityGroup>):
@@ -14306,13 +14338,13 @@ export class Resource$Floodlightconfigurations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$FloodlightConfiguration>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightConfiguration>,
       callback?: BodyResponseCallback<Schema$FloodlightConfiguration>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightConfiguration>,
       callback?: BodyResponseCallback<Schema$FloodlightConfiguration>):
@@ -14363,17 +14395,17 @@ export class Resource$Floodlightconfigurations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FloodlightConfigurationsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightConfigurationsListResponse>,
       callback?:
           BodyResponseCallback<Schema$FloodlightConfigurationsListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightConfigurationsListResponse>,
       callback?:
@@ -14429,15 +14461,15 @@ export class Resource$Floodlightconfigurations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FloodlightConfiguration>;
   patch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightConfiguration>,
       callback?: BodyResponseCallback<Schema$FloodlightConfiguration>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightConfiguration>,
       callback?: BodyResponseCallback<Schema$FloodlightConfiguration>):
@@ -14488,15 +14520,15 @@ export class Resource$Floodlightconfigurations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FloodlightConfiguration>;
   update(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightConfiguration>,
       callback?: BodyResponseCallback<Schema$FloodlightConfiguration>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$FloodlightConfiguration>,
       callback?: BodyResponseCallback<Schema$FloodlightConfiguration>):
@@ -14560,11 +14592,12 @@ export class Resource$Inventoryitems {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$InventoryItem>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InventoryItem>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$InventoryItem>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InventoryItem>,
       callback?: BodyResponseCallback<Schema$InventoryItem>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InventoryItem>,
       callback?: BodyResponseCallback<Schema$InventoryItem>):
       void|AxiosPromise<Schema$InventoryItem> {
@@ -14624,15 +14657,15 @@ export class Resource$Inventoryitems {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InventoryItemsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InventoryItemsListResponse>,
       callback?: BodyResponseCallback<Schema$InventoryItemsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InventoryItemsListResponse>,
       callback?: BodyResponseCallback<Schema$InventoryItemsListResponse>):
@@ -14694,14 +14727,15 @@ export class Resource$Languages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LanguagesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LanguagesListResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$LanguagesListResponse>,
       callback?: BodyResponseCallback<Schema$LanguagesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$LanguagesListResponse>,
       callback?: BodyResponseCallback<Schema$LanguagesListResponse>):
@@ -14762,14 +14796,14 @@ export class Resource$Metros {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$MetrosListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$MetrosListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$MetrosListResponse>,
       callback?: BodyResponseCallback<Schema$MetrosListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$MetrosListResponse>,
       callback?: BodyResponseCallback<Schema$MetrosListResponse>):
       void|AxiosPromise<Schema$MetrosListResponse> {
@@ -14830,11 +14864,12 @@ export class Resource$Mobilecarriers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$MobileCarrier>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$MobileCarrier>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$MobileCarrier>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$MobileCarrier>,
       callback?: BodyResponseCallback<Schema$MobileCarrier>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$MobileCarrier>,
       callback?: BodyResponseCallback<Schema$MobileCarrier>):
       void|AxiosPromise<Schema$MobileCarrier> {
@@ -14883,15 +14918,15 @@ export class Resource$Mobilecarriers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$MobileCarriersListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$MobileCarriersListResponse>,
       callback?: BodyResponseCallback<Schema$MobileCarriersListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$MobileCarriersListResponse>,
       callback?: BodyResponseCallback<Schema$MobileCarriersListResponse>):
@@ -14953,12 +14988,12 @@ export class Resource$Operatingsystems {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$OperatingSystem>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$OperatingSystem>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OperatingSystem>,
       callback?: BodyResponseCallback<Schema$OperatingSystem>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$OperatingSystem>,
       callback?: BodyResponseCallback<Schema$OperatingSystem>):
       void|AxiosPromise<Schema$OperatingSystem> {
@@ -15007,16 +15042,16 @@ export class Resource$Operatingsystems {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OperatingSystemsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OperatingSystemsListResponse>,
       callback?: BodyResponseCallback<Schema$OperatingSystemsListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OperatingSystemsListResponse>,
       callback?: BodyResponseCallback<Schema$OperatingSystemsListResponse>):
@@ -15080,13 +15115,13 @@ export class Resource$Operatingsystemversions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$OperatingSystemVersion>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OperatingSystemVersion>,
       callback?: BodyResponseCallback<Schema$OperatingSystemVersion>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OperatingSystemVersion>,
       callback?: BodyResponseCallback<Schema$OperatingSystemVersion>):
@@ -15136,17 +15171,17 @@ export class Resource$Operatingsystemversions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OperatingSystemVersionsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OperatingSystemVersionsListResponse>,
       callback?:
           BodyResponseCallback<Schema$OperatingSystemVersionsListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OperatingSystemVersionsListResponse>,
       callback?:
@@ -15213,11 +15248,12 @@ export class Resource$Orderdocuments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$OrderDocument>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$OrderDocument>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$OrderDocument>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OrderDocument>,
       callback?: BodyResponseCallback<Schema$OrderDocument>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$OrderDocument>,
       callback?: BodyResponseCallback<Schema$OrderDocument>):
       void|AxiosPromise<Schema$OrderDocument> {
@@ -15277,15 +15313,15 @@ export class Resource$Orderdocuments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrderDocumentsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OrderDocumentsListResponse>,
       callback?: BodyResponseCallback<Schema$OrderDocumentsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OrderDocumentsListResponse>,
       callback?: BodyResponseCallback<Schema$OrderDocumentsListResponse>):
@@ -15349,10 +15385,10 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Order>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Order>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Order>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Order>,
       callback?: BodyResponseCallback<Schema$Order>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Order>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Order>,
       callback?: BodyResponseCallback<Schema$Order>):
       void|AxiosPromise<Schema$Order> {
     if (typeof options === 'function') {
@@ -15409,14 +15445,14 @@ export class Resource$Orders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OrdersListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$OrdersListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OrdersListResponse>,
       callback?: BodyResponseCallback<Schema$OrdersListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$OrdersListResponse>,
       callback?: BodyResponseCallback<Schema$OrdersListResponse>):
       void|AxiosPromise<Schema$OrdersListResponse> {
@@ -15478,12 +15514,12 @@ export class Resource$Placementgroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$PlacementGroup>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PlacementGroup>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PlacementGroup>,
       callback?: BodyResponseCallback<Schema$PlacementGroup>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PlacementGroup>,
       callback?: BodyResponseCallback<Schema$PlacementGroup>):
       void|AxiosPromise<Schema$PlacementGroup> {
@@ -15533,14 +15569,14 @@ export class Resource$Placementgroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PlacementGroup>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PlacementGroup>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PlacementGroup>,
       callback?: BodyResponseCallback<Schema$PlacementGroup>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PlacementGroup>,
       callback?: BodyResponseCallback<Schema$PlacementGroup>):
       void|AxiosPromise<Schema$PlacementGroup> {
@@ -15608,16 +15644,16 @@ export class Resource$Placementgroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PlacementGroupsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$PlacementGroupsListResponse>,
       callback?: BodyResponseCallback<Schema$PlacementGroupsListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$PlacementGroupsListResponse>,
       callback?: BodyResponseCallback<Schema$PlacementGroupsListResponse>):
@@ -15670,14 +15706,14 @@ export class Resource$Placementgroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PlacementGroup>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PlacementGroup>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PlacementGroup>,
       callback?: BodyResponseCallback<Schema$PlacementGroup>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PlacementGroup>,
       callback?: BodyResponseCallback<Schema$PlacementGroup>):
       void|AxiosPromise<Schema$PlacementGroup> {
@@ -15726,14 +15762,14 @@ export class Resource$Placementgroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PlacementGroup>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PlacementGroup>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PlacementGroup>,
       callback?: BodyResponseCallback<Schema$PlacementGroup>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PlacementGroup>,
       callback?: BodyResponseCallback<Schema$PlacementGroup>):
       void|AxiosPromise<Schema$PlacementGroup> {
@@ -15796,16 +15832,16 @@ export class Resource$Placements {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  generatetags(params: any, options?: MethodOptions):
+  generatetags(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PlacementsGenerateTagsResponse>;
   generatetags(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$PlacementsGenerateTagsResponse>,
       callback?: BodyResponseCallback<Schema$PlacementsGenerateTagsResponse>):
       void;
   generatetags(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$PlacementsGenerateTagsResponse>,
       callback?: BodyResponseCallback<Schema$PlacementsGenerateTagsResponse>):
@@ -15858,11 +15894,11 @@ export class Resource$Placements {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Placement>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Placement>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Placement>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Placement>,
       callback?: BodyResponseCallback<Schema$Placement>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Placement>,
       callback?: BodyResponseCallback<Schema$Placement>):
       void|AxiosPromise<Schema$Placement> {
@@ -15911,13 +15947,13 @@ export class Resource$Placements {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Placement>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Placement>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Placement>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Placement>,
       callback?: BodyResponseCallback<Schema$Placement>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Placement>,
       callback?: BodyResponseCallback<Schema$Placement>):
       void|AxiosPromise<Schema$Placement> {
@@ -15988,15 +16024,15 @@ export class Resource$Placements {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PlacementsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$PlacementsListResponse>,
       callback?: BodyResponseCallback<Schema$PlacementsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$PlacementsListResponse>,
       callback?: BodyResponseCallback<Schema$PlacementsListResponse>):
@@ -16047,13 +16083,13 @@ export class Resource$Placements {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Placement>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Placement>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Placement>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Placement>,
       callback?: BodyResponseCallback<Schema$Placement>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Placement>,
       callback?: BodyResponseCallback<Schema$Placement>):
       void|AxiosPromise<Schema$Placement> {
@@ -16102,13 +16138,13 @@ export class Resource$Placements {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Placement>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Placement>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Placement>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Placement>,
       callback?: BodyResponseCallback<Schema$Placement>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Placement>,
       callback?: BodyResponseCallback<Schema$Placement>):
       void|AxiosPromise<Schema$Placement> {
@@ -16169,12 +16205,12 @@ export class Resource$Placementstrategies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -16222,12 +16258,12 @@ export class Resource$Placementstrategies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$PlacementStrategy>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PlacementStrategy>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PlacementStrategy>,
       callback?: BodyResponseCallback<Schema$PlacementStrategy>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PlacementStrategy>,
       callback?: BodyResponseCallback<Schema$PlacementStrategy>):
       void|AxiosPromise<Schema$PlacementStrategy> {
@@ -16277,14 +16313,14 @@ export class Resource$Placementstrategies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PlacementStrategy>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PlacementStrategy>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PlacementStrategy>,
       callback?: BodyResponseCallback<Schema$PlacementStrategy>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PlacementStrategy>,
       callback?: BodyResponseCallback<Schema$PlacementStrategy>):
       void|AxiosPromise<Schema$PlacementStrategy> {
@@ -16340,16 +16376,16 @@ export class Resource$Placementstrategies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PlacementStrategiesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$PlacementStrategiesListResponse>,
       callback?: BodyResponseCallback<Schema$PlacementStrategiesListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$PlacementStrategiesListResponse>,
       callback?: BodyResponseCallback<Schema$PlacementStrategiesListResponse>):
@@ -16404,14 +16440,14 @@ export class Resource$Placementstrategies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PlacementStrategy>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PlacementStrategy>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PlacementStrategy>,
       callback?: BodyResponseCallback<Schema$PlacementStrategy>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PlacementStrategy>,
       callback?: BodyResponseCallback<Schema$PlacementStrategy>):
       void|AxiosPromise<Schema$PlacementStrategy> {
@@ -16461,14 +16497,14 @@ export class Resource$Placementstrategies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PlacementStrategy>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PlacementStrategy>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PlacementStrategy>,
       callback?: BodyResponseCallback<Schema$PlacementStrategy>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PlacementStrategy>,
       callback?: BodyResponseCallback<Schema$PlacementStrategy>):
       void|AxiosPromise<Schema$PlacementStrategy> {
@@ -16530,11 +16566,11 @@ export class Resource$Platformtypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$PlatformType>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PlatformType>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$PlatformType>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PlatformType>,
       callback?: BodyResponseCallback<Schema$PlatformType>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PlatformType>,
       callback?: BodyResponseCallback<Schema$PlatformType>):
       void|AxiosPromise<Schema$PlatformType> {
@@ -16583,15 +16619,15 @@ export class Resource$Platformtypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PlatformTypesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$PlatformTypesListResponse>,
       callback?: BodyResponseCallback<Schema$PlatformTypesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$PlatformTypesListResponse>,
       callback?: BodyResponseCallback<Schema$PlatformTypesListResponse>):
@@ -16653,11 +16689,11 @@ export class Resource$Postalcodes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$PostalCode>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PostalCode>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$PostalCode>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PostalCode>,
       callback?: BodyResponseCallback<Schema$PostalCode>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PostalCode>,
       callback?: BodyResponseCallback<Schema$PostalCode>):
       void|AxiosPromise<Schema$PostalCode> {
@@ -16706,15 +16742,15 @@ export class Resource$Postalcodes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PostalCodesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$PostalCodesListResponse>,
       callback?: BodyResponseCallback<Schema$PostalCodesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$PostalCodesListResponse>,
       callback?: BodyResponseCallback<Schema$PostalCodesListResponse>):
@@ -16776,10 +16812,12 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Project>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Project>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Project>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Project>,
       callback?: BodyResponseCallback<Schema$Project>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Project>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Project>,
       callback?: BodyResponseCallback<Schema$Project>):
       void|AxiosPromise<Schema$Project> {
     if (typeof options === 'function') {
@@ -16834,14 +16872,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ProjectsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ProjectsListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ProjectsListResponse>,
       callback?: BodyResponseCallback<Schema$ProjectsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ProjectsListResponse>,
       callback?: BodyResponseCallback<Schema$ProjectsListResponse>):
       void|AxiosPromise<Schema$ProjectsListResponse> {
@@ -16901,14 +16939,14 @@ export class Resource$Regions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RegionsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RegionsListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RegionsListResponse>,
       callback?: BodyResponseCallback<Schema$RegionsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RegionsListResponse>,
       callback?: BodyResponseCallback<Schema$RegionsListResponse>):
       void|AxiosPromise<Schema$RegionsListResponse> {
@@ -16969,12 +17007,12 @@ export class Resource$Remarketinglists {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$RemarketingList>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RemarketingList>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RemarketingList>,
       callback?: BodyResponseCallback<Schema$RemarketingList>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RemarketingList>,
       callback?: BodyResponseCallback<Schema$RemarketingList>):
       void|AxiosPromise<Schema$RemarketingList> {
@@ -17024,14 +17062,14 @@ export class Resource$Remarketinglists {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RemarketingList>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RemarketingList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RemarketingList>,
       callback?: BodyResponseCallback<Schema$RemarketingList>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RemarketingList>,
       callback?: BodyResponseCallback<Schema$RemarketingList>):
       void|AxiosPromise<Schema$RemarketingList> {
@@ -17089,16 +17127,16 @@ export class Resource$Remarketinglists {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RemarketingListsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$RemarketingListsListResponse>,
       callback?: BodyResponseCallback<Schema$RemarketingListsListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$RemarketingListsListResponse>,
       callback?: BodyResponseCallback<Schema$RemarketingListsListResponse>):
@@ -17152,14 +17190,14 @@ export class Resource$Remarketinglists {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RemarketingList>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RemarketingList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RemarketingList>,
       callback?: BodyResponseCallback<Schema$RemarketingList>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RemarketingList>,
       callback?: BodyResponseCallback<Schema$RemarketingList>):
       void|AxiosPromise<Schema$RemarketingList> {
@@ -17209,14 +17247,14 @@ export class Resource$Remarketinglists {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RemarketingList>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RemarketingList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RemarketingList>,
       callback?: BodyResponseCallback<Schema$RemarketingList>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RemarketingList>,
       callback?: BodyResponseCallback<Schema$RemarketingList>):
       void|AxiosPromise<Schema$RemarketingList> {
@@ -17278,12 +17316,12 @@ export class Resource$Remarketinglistshares {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$RemarketingListShare>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RemarketingListShare>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RemarketingListShare>,
       callback?: BodyResponseCallback<Schema$RemarketingListShare>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RemarketingListShare>,
       callback?: BodyResponseCallback<Schema$RemarketingListShare>):
       void|AxiosPromise<Schema$RemarketingListShare> {
@@ -17335,14 +17373,14 @@ export class Resource$Remarketinglistshares {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RemarketingListShare>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RemarketingListShare>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RemarketingListShare>,
       callback?: BodyResponseCallback<Schema$RemarketingListShare>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RemarketingListShare>,
       callback?: BodyResponseCallback<Schema$RemarketingListShare>):
       void|AxiosPromise<Schema$RemarketingListShare> {
@@ -17392,14 +17430,14 @@ export class Resource$Remarketinglistshares {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RemarketingListShare>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RemarketingListShare>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RemarketingListShare>,
       callback?: BodyResponseCallback<Schema$RemarketingListShare>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RemarketingListShare>,
       callback?: BodyResponseCallback<Schema$RemarketingListShare>):
       void|AxiosPromise<Schema$RemarketingListShare> {
@@ -17465,12 +17503,12 @@ export class Resource$Reports {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -17518,10 +17556,10 @@ export class Resource$Reports {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Report>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>):
       void|AxiosPromise<Schema$Report> {
     if (typeof options === 'function') {
@@ -17570,12 +17608,12 @@ export class Resource$Reports {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Report>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>):
       void|AxiosPromise<Schema$Report> {
     if (typeof options === 'function') {
@@ -17627,13 +17665,13 @@ export class Resource$Reports {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$ReportList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$ReportList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ReportList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ReportList>,
       callback?: BodyResponseCallback<Schema$ReportList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ReportList>,
       callback?: BodyResponseCallback<Schema$ReportList>):
       void|AxiosPromise<Schema$ReportList> {
@@ -17683,12 +17721,12 @@ export class Resource$Reports {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Report>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>):
       void|AxiosPromise<Schema$Report> {
     if (typeof options === 'function') {
@@ -17738,10 +17776,10 @@ export class Resource$Reports {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  run(params: any, options?: MethodOptions): AxiosPromise<Schema$File>;
-  run(params: any, options: MethodOptions|BodyResponseCallback<Schema$File>,
+  run(params?: any, options?: MethodOptions): AxiosPromise<Schema$File>;
+  run(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
       callback?: BodyResponseCallback<Schema$File>): void;
-  run(params: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
+  run(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
       callback?: BodyResponseCallback<Schema$File>):
       void|AxiosPromise<Schema$File> {
     if (typeof options === 'function') {
@@ -17791,12 +17829,12 @@ export class Resource$Reports {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Report>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>):
       void|AxiosPromise<Schema$Report> {
     if (typeof options === 'function') {
@@ -17858,14 +17896,14 @@ export class Resource$Reports$Compatiblefields {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  query(params: any, options?: MethodOptions):
+  query(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CompatibleFields>;
   query(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CompatibleFields>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CompatibleFields>,
       callback?: BodyResponseCallback<Schema$CompatibleFields>): void;
   query(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CompatibleFields>,
       callback?: BodyResponseCallback<Schema$CompatibleFields>):
       void|AxiosPromise<Schema$CompatibleFields> {
@@ -17928,10 +17966,10 @@ export class Resource$Reports$Files {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$File>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$File>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$File>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
       callback?: BodyResponseCallback<Schema$File>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
       callback?: BodyResponseCallback<Schema$File>):
       void|AxiosPromise<Schema$File> {
     if (typeof options === 'function') {
@@ -17984,12 +18022,13 @@ export class Resource$Reports$Files {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$FileList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$FileList>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$FileList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$FileList>,
       callback?: BodyResponseCallback<Schema$FileList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$FileList>,
       callback?: BodyResponseCallback<Schema$FileList>):
       void|AxiosPromise<Schema$FileList> {
@@ -18052,10 +18091,10 @@ export class Resource$Sites {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Site>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Site>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Site>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Site>,
       callback?: BodyResponseCallback<Schema$Site>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Site>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Site>,
       callback?: BodyResponseCallback<Schema$Site>):
       void|AxiosPromise<Schema$Site> {
     if (typeof options === 'function') {
@@ -18103,12 +18142,12 @@ export class Resource$Sites {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Site>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Site>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Site>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Site>,
       callback?: BodyResponseCallback<Schema$Site>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Site>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Site>,
       callback?: BodyResponseCallback<Schema$Site>):
       void|AxiosPromise<Schema$Site> {
     if (typeof options === 'function') {
@@ -18170,14 +18209,14 @@ export class Resource$Sites {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SitesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SitesListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SitesListResponse>,
       callback?: BodyResponseCallback<Schema$SitesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SitesListResponse>,
       callback?: BodyResponseCallback<Schema$SitesListResponse>):
       void|AxiosPromise<Schema$SitesListResponse> {
@@ -18226,12 +18265,12 @@ export class Resource$Sites {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Site>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Site>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Site>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Site>,
       callback?: BodyResponseCallback<Schema$Site>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Site>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Site>,
       callback?: BodyResponseCallback<Schema$Site>):
       void|AxiosPromise<Schema$Site> {
     if (typeof options === 'function') {
@@ -18278,12 +18317,12 @@ export class Resource$Sites {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Site>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Site>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Site>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Site>,
       callback?: BodyResponseCallback<Schema$Site>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Site>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Site>,
       callback?: BodyResponseCallback<Schema$Site>):
       void|AxiosPromise<Schema$Site> {
     if (typeof options === 'function') {
@@ -18342,10 +18381,10 @@ export class Resource$Sizes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Size>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Size>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Size>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Size>,
       callback?: BodyResponseCallback<Schema$Size>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Size>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Size>,
       callback?: BodyResponseCallback<Schema$Size>):
       void|AxiosPromise<Schema$Size> {
     if (typeof options === 'function') {
@@ -18393,12 +18432,12 @@ export class Resource$Sizes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Size>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Size>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Size>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Size>,
       callback?: BodyResponseCallback<Schema$Size>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Size>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Size>,
       callback?: BodyResponseCallback<Schema$Size>):
       void|AxiosPromise<Schema$Size> {
     if (typeof options === 'function') {
@@ -18448,14 +18487,14 @@ export class Resource$Sizes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SizesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SizesListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SizesListResponse>,
       callback?: BodyResponseCallback<Schema$SizesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SizesListResponse>,
       callback?: BodyResponseCallback<Schema$SizesListResponse>):
       void|AxiosPromise<Schema$SizesListResponse> {
@@ -18515,11 +18554,11 @@ export class Resource$Subaccounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Subaccount>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Subaccount>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Subaccount>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Subaccount>,
       callback?: BodyResponseCallback<Schema$Subaccount>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Subaccount>,
       callback?: BodyResponseCallback<Schema$Subaccount>):
       void|AxiosPromise<Schema$Subaccount> {
@@ -18569,13 +18608,14 @@ export class Resource$Subaccounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Subaccount>;
+  insert(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Subaccount>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Subaccount>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Subaccount>,
       callback?: BodyResponseCallback<Schema$Subaccount>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Subaccount>,
       callback?: BodyResponseCallback<Schema$Subaccount>):
       void|AxiosPromise<Schema$Subaccount> {
@@ -18630,15 +18670,15 @@ export class Resource$Subaccounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SubaccountsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SubaccountsListResponse>,
       callback?: BodyResponseCallback<Schema$SubaccountsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SubaccountsListResponse>,
       callback?: BodyResponseCallback<Schema$SubaccountsListResponse>):
@@ -18689,13 +18729,13 @@ export class Resource$Subaccounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Subaccount>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Subaccount>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Subaccount>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Subaccount>,
       callback?: BodyResponseCallback<Schema$Subaccount>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Subaccount>,
       callback?: BodyResponseCallback<Schema$Subaccount>):
       void|AxiosPromise<Schema$Subaccount> {
@@ -18744,13 +18784,14 @@ export class Resource$Subaccounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Subaccount>;
+  update(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Subaccount>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Subaccount>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Subaccount>,
       callback?: BodyResponseCallback<Schema$Subaccount>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Subaccount>,
       callback?: BodyResponseCallback<Schema$Subaccount>):
       void|AxiosPromise<Schema$Subaccount> {
@@ -18811,13 +18852,13 @@ export class Resource$Targetableremarketinglists {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$TargetableRemarketingList>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TargetableRemarketingList>,
       callback?: BodyResponseCallback<Schema$TargetableRemarketingList>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TargetableRemarketingList>,
       callback?: BodyResponseCallback<Schema$TargetableRemarketingList>):
@@ -18875,17 +18916,17 @@ export class Resource$Targetableremarketinglists {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetableRemarketingListsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TargetableRemarketingListsListResponse>,
       callback?:
           BodyResponseCallback<Schema$TargetableRemarketingListsListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TargetableRemarketingListsListResponse>,
       callback?:
@@ -18951,12 +18992,12 @@ export class Resource$Targetingtemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$TargetingTemplate>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetingTemplate>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetingTemplate>,
       callback?: BodyResponseCallback<Schema$TargetingTemplate>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetingTemplate>,
       callback?: BodyResponseCallback<Schema$TargetingTemplate>):
       void|AxiosPromise<Schema$TargetingTemplate> {
@@ -19006,14 +19047,14 @@ export class Resource$Targetingtemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetingTemplate>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetingTemplate>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetingTemplate>,
       callback?: BodyResponseCallback<Schema$TargetingTemplate>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetingTemplate>,
       callback?: BodyResponseCallback<Schema$TargetingTemplate>):
       void|AxiosPromise<Schema$TargetingTemplate> {
@@ -19070,16 +19111,16 @@ export class Resource$Targetingtemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetingTemplatesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TargetingTemplatesListResponse>,
       callback?: BodyResponseCallback<Schema$TargetingTemplatesListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TargetingTemplatesListResponse>,
       callback?: BodyResponseCallback<Schema$TargetingTemplatesListResponse>):
@@ -19134,14 +19175,14 @@ export class Resource$Targetingtemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetingTemplate>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetingTemplate>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetingTemplate>,
       callback?: BodyResponseCallback<Schema$TargetingTemplate>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetingTemplate>,
       callback?: BodyResponseCallback<Schema$TargetingTemplate>):
       void|AxiosPromise<Schema$TargetingTemplate> {
@@ -19191,14 +19232,14 @@ export class Resource$Targetingtemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TargetingTemplate>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TargetingTemplate>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TargetingTemplate>,
       callback?: BodyResponseCallback<Schema$TargetingTemplate>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TargetingTemplate>,
       callback?: BodyResponseCallback<Schema$TargetingTemplate>):
       void|AxiosPromise<Schema$TargetingTemplate> {
@@ -19259,11 +19300,11 @@ export class Resource$Userprofiles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$UserProfile>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UserProfile>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$UserProfile>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UserProfile>,
       callback?: BodyResponseCallback<Schema$UserProfile>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UserProfile>,
       callback?: BodyResponseCallback<Schema$UserProfile>):
       void|AxiosPromise<Schema$UserProfile> {
@@ -19309,14 +19350,14 @@ export class Resource$Userprofiles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$UserProfileList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UserProfileList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UserProfileList>,
       callback?: BodyResponseCallback<Schema$UserProfileList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UserProfileList>,
       callback?: BodyResponseCallback<Schema$UserProfileList>):
       void|AxiosPromise<Schema$UserProfileList> {
@@ -19376,13 +19417,13 @@ export class Resource$Userrolepermissiongroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$UserRolePermissionGroup>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$UserRolePermissionGroup>,
       callback?: BodyResponseCallback<Schema$UserRolePermissionGroup>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$UserRolePermissionGroup>,
       callback?: BodyResponseCallback<Schema$UserRolePermissionGroup>):
@@ -19432,17 +19473,17 @@ export class Resource$Userrolepermissiongroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$UserRolePermissionGroupsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$UserRolePermissionGroupsListResponse>,
       callback?:
           BodyResponseCallback<Schema$UserRolePermissionGroupsListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$UserRolePermissionGroupsListResponse>,
       callback?:
@@ -19508,12 +19549,12 @@ export class Resource$Userrolepermissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$UserRolePermission>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UserRolePermission>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UserRolePermission>,
       callback?: BodyResponseCallback<Schema$UserRolePermission>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UserRolePermission>,
       callback?: BodyResponseCallback<Schema$UserRolePermission>):
       void|AxiosPromise<Schema$UserRolePermission> {
@@ -19563,16 +19604,16 @@ export class Resource$Userrolepermissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$UserRolePermissionsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$UserRolePermissionsListResponse>,
       callback?: BodyResponseCallback<Schema$UserRolePermissionsListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$UserRolePermissionsListResponse>,
       callback?: BodyResponseCallback<Schema$UserRolePermissionsListResponse>):
@@ -19637,12 +19678,12 @@ export class Resource$Userroles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -19689,10 +19730,11 @@ export class Resource$Userroles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$UserRole>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$UserRole>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$UserRole>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UserRole>,
       callback?: BodyResponseCallback<Schema$UserRole>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UserRole>,
       callback?: BodyResponseCallback<Schema$UserRole>):
       void|AxiosPromise<Schema$UserRole> {
@@ -19741,12 +19783,13 @@ export class Resource$Userroles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$UserRole>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$UserRole>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$UserRole>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UserRole>,
       callback?: BodyResponseCallback<Schema$UserRole>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UserRole>,
       callback?: BodyResponseCallback<Schema$UserRole>):
       void|AxiosPromise<Schema$UserRole> {
@@ -19803,14 +19846,15 @@ export class Resource$Userroles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$UserRolesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UserRolesListResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$UserRolesListResponse>,
       callback?: BodyResponseCallback<Schema$UserRolesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$UserRolesListResponse>,
       callback?: BodyResponseCallback<Schema$UserRolesListResponse>):
@@ -19861,12 +19905,13 @@ export class Resource$Userroles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$UserRole>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$UserRole>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$UserRole>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UserRole>,
       callback?: BodyResponseCallback<Schema$UserRole>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UserRole>,
       callback?: BodyResponseCallback<Schema$UserRole>):
       void|AxiosPromise<Schema$UserRole> {
@@ -19915,12 +19960,13 @@ export class Resource$Userroles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$UserRole>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$UserRole>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$UserRole>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UserRole>,
       callback?: BodyResponseCallback<Schema$UserRole>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UserRole>,
       callback?: BodyResponseCallback<Schema$UserRole>):
       void|AxiosPromise<Schema$UserRole> {
@@ -19981,11 +20027,11 @@ export class Resource$Videoformats {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$VideoFormat>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$VideoFormat>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$VideoFormat>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$VideoFormat>,
       callback?: BodyResponseCallback<Schema$VideoFormat>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$VideoFormat>,
       callback?: BodyResponseCallback<Schema$VideoFormat>):
       void|AxiosPromise<Schema$VideoFormat> {
@@ -20034,15 +20080,15 @@ export class Resource$Videoformats {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$VideoFormatsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$VideoFormatsListResponse>,
       callback?: BodyResponseCallback<Schema$VideoFormatsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$VideoFormatsListResponse>,
       callback?: BodyResponseCallback<Schema$VideoFormatsListResponse>):
diff --git a/src/apis/dialogflow/v2.ts b/src/apis/dialogflow/v2.ts
index d14db14300..70088e069d 100644
--- a/src/apis/dialogflow/v2.ts
+++ b/src/apis/dialogflow/v2.ts
@@ -70,7 +70,7 @@ export class Dialogflow {
 export interface Schema$GoogleCloudDialogflowV2Agent {
   /**
    * Optional. The URI of the agent&#39;s avatar. Avatars are used throughout
-   * API.AI console and in the self-hosted [Web
+   * the Dialogflow console and in the self-hosted [Web
    * Demo](https://dialogflow.com/docs/integrations/web-demo) integration.
    */
   avatarUri: string;
@@ -306,11 +306,12 @@ export interface Schema$GoogleCloudDialogflowV2beta1Context {
    * Required. The unique identifier of the context. Format:
    * `projects/&lt;Project ID&gt;/agent/sessions/&lt;Session
    * ID&gt;/contexts/&lt;Context ID&gt;`, or `projects/&lt;Project
-   * ID&gt;/agent/runtimes/&lt;Runtime ID&gt;/sessions/&lt;Session
-   * ID&gt;/contexts/&lt;Context ID&gt;`. Note: Runtimes are under construction
-   * and will be available soon. The Context ID is always converted to
-   * lowercase. If &lt;Runtime ID&gt; is not specified, we assume default
-   * &#39;sandbox&#39; runtime.
+   * ID&gt;/agent/environments/&lt;Environment ID&gt;/users/&lt;User
+   * ID&gt;/sessions/&lt;Session ID&gt;/contexts/&lt;Context ID&gt;`. Note:
+   * Environments and users are under construction and will be available soon.
+   * The Context ID is always converted to lowercase. If &lt;Environment ID&gt;
+   * is not specified, we assume default &#39;draft&#39; environment. If
+   * &lt;User ID&gt; is not specified, we assume default &#39;-&#39; user.
    */
   name: string;
   /**
@@ -453,7 +454,7 @@ export interface Schema$GoogleCloudDialogflowV2beta1Intent {
   isFallback: boolean;
   /**
    * Optional. The collection of rich messages corresponding to the `Response`
-   * field in API.AI console.
+   * field in the Dialogflow console.
    */
   messages: Schema$GoogleCloudDialogflowV2beta1IntentMessage[];
   /**
@@ -540,7 +541,7 @@ export interface Schema$GoogleCloudDialogflowV2beta1IntentFollowupIntentInfo {
   parentFollowupIntentName: string;
 }
 /**
- * Corresponds to the `Response` field in API.AI console.
+ * Corresponds to the `Response` field in the Dialogflow console.
  */
 export interface Schema$GoogleCloudDialogflowV2beta1IntentMessage {
   /**
@@ -1132,12 +1133,7 @@ export interface Schema$GoogleCloudDialogflowV2Context {
   /**
    * Required. The unique identifier of the context. Format:
    * `projects/&lt;Project ID&gt;/agent/sessions/&lt;Session
-   * ID&gt;/contexts/&lt;Context ID&gt;`, or `projects/&lt;Project
-   * ID&gt;/agent/runtimes/&lt;Runtime ID&gt;/sessions/&lt;Session
-   * ID&gt;/contexts/&lt;Context ID&gt;`. Note: Runtimes are under construction
-   * and will be available soon. The Context ID is always converted to
-   * lowercase. If &lt;Runtime ID&gt; is not specified, we assume default
-   * &#39;sandbox&#39; runtime.
+   * ID&gt;/contexts/&lt;Context ID&gt;`.
    */
   name: string;
   /**
@@ -1389,7 +1385,7 @@ export interface Schema$GoogleCloudDialogflowV2Intent {
   isFallback: boolean;
   /**
    * Optional. The collection of rich messages corresponding to the `Response`
-   * field in API.AI console.
+   * field in the Dialogflow console.
    */
   messages: Schema$GoogleCloudDialogflowV2IntentMessage[];
   /**
@@ -1474,7 +1470,7 @@ export interface Schema$GoogleCloudDialogflowV2IntentFollowupIntentInfo {
   parentFollowupIntentName: string;
 }
 /**
- * Corresponds to the `Response` field in API.AI console.
+ * Corresponds to the `Response` field in the Dialogflow console.
  */
 export interface Schema$GoogleCloudDialogflowV2IntentMessage {
   /**
@@ -2162,12 +2158,7 @@ export interface Schema$GoogleCloudDialogflowV2SessionEntityType {
   /**
    * Required. The unique identifier of this session entity type. Format:
    * `projects/&lt;Project ID&gt;/agent/sessions/&lt;Session
-   * ID&gt;/entityTypes/&lt;Entity Type Display Name&gt;`, or
-   * `projects/&lt;Project ID&gt;/agent/runtimes/&lt;Runtime
-   * ID&gt;sessions/&lt;Session ID&gt;/entityTypes/&lt;Entity Type Display
-   * Name&gt;`. Note: Runtimes are under construction and will be available
-   * soon. If &lt;Runtime ID&gt; is not specified, we assume default
-   * &#39;sandbox&#39; runtime.
+   * ID&gt;/entityTypes/&lt;Entity Type Display Name&gt;`.
    */
   name: string;
 }
@@ -2397,16 +2388,16 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getAgent(params: any, options?: MethodOptions):
+  getAgent(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudDialogflowV2Agent>;
   getAgent(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2Agent>,
       callback?: BodyResponseCallback<Schema$GoogleCloudDialogflowV2Agent>):
       void;
   getAgent(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2Agent>,
       callback?: BodyResponseCallback<Schema$GoogleCloudDialogflowV2Agent>):
@@ -2445,14 +2436,12 @@ export class Resource$Projects$Agent {
   root: Dialogflow;
   entityTypes: Resource$Projects$Agent$Entitytypes;
   intents: Resource$Projects$Agent$Intents;
-  runtimes: Resource$Projects$Agent$Runtimes;
   sessions: Resource$Projects$Agent$Sessions;
   constructor(root: Dialogflow) {
     this.root = root;
     this.getRoot.bind(this);
     this.entityTypes = new Resource$Projects$Agent$Entitytypes(root);
     this.intents = new Resource$Projects$Agent$Intents(root);
-    this.runtimes = new Resource$Projects$Agent$Runtimes(root);
     this.sessions = new Resource$Projects$Agent$Sessions(root);
   }
 
@@ -2463,7 +2452,7 @@ export class Resource$Projects$Agent {
 
   /**
    * dialogflow.projects.agent.export
-   * @desc Exports the specified agent to a ZIP file.   Operation <response:
+   * @desc Exports the specified agent to a ZIP file.  Operation <response:
    * ExportAgentResponse,            metadata: google.protobuf.Struct>
    * @alias dialogflow.projects.agent.export
    * @memberOf! ()
@@ -2475,15 +2464,15 @@ export class Resource$Projects$Agent {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  export(params: any, options?: MethodOptions):
+  export(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleLongrunningOperation>;
   export(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
   export(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>):
@@ -2524,7 +2513,7 @@ export class Resource$Projects$Agent {
    * @desc Imports the specified agent from a ZIP file.  Uploads new intents and
    * entity types without deleting the existing ones. Intents and entity types
    * with the same name are replaced with the new versions from
-   * ImportAgentRequest.   Operation <response: google.protobuf.Empty,
+   * ImportAgentRequest.  Operation <response: google.protobuf.Empty,
    * metadata: google.protobuf.Struct>
    * @alias dialogflow.projects.agent.import
    * @memberOf! ()
@@ -2536,9 +2525,9 @@ export class Resource$Projects$Agent {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-import(params: any, options?: MethodOptions): AxiosPromise<Schema$GoogleLongrunningOperation>;
-import(params: any, options: MethodOptions|BodyResponseCallback<Schema$GoogleLongrunningOperation>, callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
-import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$GoogleLongrunningOperation>, callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void|AxiosPromise<Schema$GoogleLongrunningOperation> {if(typeof options === 'function') {
+import(params?: any, options?: MethodOptions): AxiosPromise<Schema$GoogleLongrunningOperation>;
+import(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$GoogleLongrunningOperation>, callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
+import(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$GoogleLongrunningOperation>, callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void|AxiosPromise<Schema$GoogleLongrunningOperation> {if(typeof options === 'function') {
     callback = options;
     options = {};
   } if(typeof params === 'function') {
@@ -2553,7 +2542,7 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$GoogleLo
 
   /**
  * dialogflow.projects.agent.restore
- * @desc Restores the specified agent from a ZIP file.  Replaces the current agent version with a new one. All the intents and entity types in the older version are deleted.   Operation <response: google.protobuf.Empty,            metadata: google.protobuf.Struct>
+ * @desc Restores the specified agent from a ZIP file.  Replaces the current agent version with a new one. All the intents and entity types in the older version are deleted.  Operation <response: google.protobuf.Empty,            metadata: google.protobuf.Struct>
  * @alias dialogflow.projects.agent.restore
  * @memberOf! ()
  *
@@ -2564,14 +2553,14 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$GoogleLo
  * @param {callback} callback The callback that handles the response.
  * @return {object} Request object
  */
-  restore(params: any, options?: MethodOptions): AxiosPromise<Schema$GoogleLongrunningOperation>;
+  restore(params?: any, options?: MethodOptions): AxiosPromise<Schema$GoogleLongrunningOperation>;
   restore(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
   restore(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>):
@@ -2625,16 +2614,16 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$GoogleLo
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  search(params: any, options?: MethodOptions):
+  search(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudDialogflowV2SearchAgentsResponse>;
   search(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2SearchAgentsResponse>,
       callback?: BodyResponseCallback<
           Schema$GoogleCloudDialogflowV2SearchAgentsResponse>): void;
   search(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2SearchAgentsResponse>,
       callback?: BodyResponseCallback<
@@ -2675,7 +2664,7 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$GoogleLo
 
   /**
    * dialogflow.projects.agent.train
-   * @desc Trains the specified agent.   Operation <response:
+   * @desc Trains the specified agent.  Operation <response:
    * google.protobuf.Empty,            metadata: google.protobuf.Struct>
    * @alias dialogflow.projects.agent.train
    * @memberOf! ()
@@ -2687,15 +2676,15 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$GoogleLo
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  train(params: any, options?: MethodOptions):
+  train(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleLongrunningOperation>;
   train(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
   train(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>):
@@ -2758,15 +2747,15 @@ export class Resource$Projects$Agent$Entitytypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchDelete(params: any, options?: MethodOptions):
+  batchDelete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleLongrunningOperation>;
   batchDelete(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
   batchDelete(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>):
@@ -2817,15 +2806,15 @@ export class Resource$Projects$Agent$Entitytypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchUpdate(params: any, options?: MethodOptions):
+  batchUpdate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleLongrunningOperation>;
   batchUpdate(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
   batchUpdate(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>):
@@ -2875,16 +2864,16 @@ export class Resource$Projects$Agent$Entitytypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudDialogflowV2EntityType>;
   create(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2EntityType>,
       callback?:
           BodyResponseCallback<Schema$GoogleCloudDialogflowV2EntityType>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2EntityType>,
       callback?:
@@ -2935,14 +2924,14 @@ export class Resource$Projects$Agent$Entitytypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions):
+  delete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleProtobufEmpty>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>):
       void|AxiosPromise<Schema$GoogleProtobufEmpty> {
@@ -2989,14 +2978,14 @@ export class Resource$Projects$Agent$Entitytypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions):
+  get(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudDialogflowV2EntityType>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2EntityType>,
       callback?:
           BodyResponseCallback<Schema$GoogleCloudDialogflowV2EntityType>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2EntityType>,
       callback?:
@@ -3049,16 +3038,16 @@ export class Resource$Projects$Agent$Entitytypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudDialogflowV2ListEntityTypesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$GoogleCloudDialogflowV2ListEntityTypesResponse>,
       callback?: BodyResponseCallback<
           Schema$GoogleCloudDialogflowV2ListEntityTypesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$GoogleCloudDialogflowV2ListEntityTypesResponse>,
       callback?: BodyResponseCallback<
@@ -3112,16 +3101,16 @@ export class Resource$Projects$Agent$Entitytypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudDialogflowV2EntityType>;
   patch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2EntityType>,
       callback?:
           BodyResponseCallback<Schema$GoogleCloudDialogflowV2EntityType>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2EntityType>,
       callback?:
@@ -3185,15 +3174,15 @@ export class Resource$Projects$Agent$Entitytypes$Entities {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchCreate(params: any, options?: MethodOptions):
+  batchCreate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleLongrunningOperation>;
   batchCreate(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
   batchCreate(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>):
@@ -3243,15 +3232,15 @@ export class Resource$Projects$Agent$Entitytypes$Entities {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchDelete(params: any, options?: MethodOptions):
+  batchDelete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleLongrunningOperation>;
   batchDelete(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
   batchDelete(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>):
@@ -3302,15 +3291,15 @@ export class Resource$Projects$Agent$Entitytypes$Entities {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchUpdate(params: any, options?: MethodOptions):
+  batchUpdate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleLongrunningOperation>;
   batchUpdate(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
   batchUpdate(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>):
@@ -3373,15 +3362,15 @@ export class Resource$Projects$Agent$Intents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchDelete(params: any, options?: MethodOptions):
+  batchDelete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleLongrunningOperation>;
   batchDelete(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
   batchDelete(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>):
@@ -3431,15 +3420,15 @@ export class Resource$Projects$Agent$Intents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchUpdate(params: any, options?: MethodOptions):
+  batchUpdate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleLongrunningOperation>;
   batchUpdate(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
   batchUpdate(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>):
@@ -3490,16 +3479,16 @@ export class Resource$Projects$Agent$Intents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudDialogflowV2Intent>;
   create(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2Intent>,
       callback?: BodyResponseCallback<Schema$GoogleCloudDialogflowV2Intent>):
       void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2Intent>,
       callback?: BodyResponseCallback<Schema$GoogleCloudDialogflowV2Intent>):
@@ -3548,14 +3537,14 @@ export class Resource$Projects$Agent$Intents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions):
+  delete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleProtobufEmpty>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>):
       void|AxiosPromise<Schema$GoogleProtobufEmpty> {
@@ -3603,14 +3592,14 @@ export class Resource$Projects$Agent$Intents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions):
+  get(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudDialogflowV2Intent>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2Intent>,
       callback?: BodyResponseCallback<Schema$GoogleCloudDialogflowV2Intent>):
       void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2Intent>,
       callback?: BodyResponseCallback<Schema$GoogleCloudDialogflowV2Intent>):
@@ -3662,16 +3651,16 @@ export class Resource$Projects$Agent$Intents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudDialogflowV2ListIntentsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2ListIntentsResponse>,
       callback?: BodyResponseCallback<
           Schema$GoogleCloudDialogflowV2ListIntentsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2ListIntentsResponse>,
       callback?: BodyResponseCallback<
@@ -3726,16 +3715,16 @@ export class Resource$Projects$Agent$Intents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudDialogflowV2Intent>;
   patch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2Intent>,
       callback?: BodyResponseCallback<Schema$GoogleCloudDialogflowV2Intent>):
       void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2Intent>,
       callback?: BodyResponseCallback<Schema$GoogleCloudDialogflowV2Intent>):
@@ -3771,30 +3760,15 @@ export class Resource$Projects$Agent$Intents {
   }
 }
 
-export class Resource$Projects$Agent$Runtimes {
-  root: Dialogflow;
-  sessions: Resource$Projects$Agent$Runtimes$Sessions;
-  constructor(root: Dialogflow) {
-    this.root = root;
-    this.getRoot.bind(this);
-    this.sessions = new Resource$Projects$Agent$Runtimes$Sessions(root);
-  }
-
-  getRoot() {
-    return this.root;
-  }
-}
-export class Resource$Projects$Agent$Runtimes$Sessions {
+export class Resource$Projects$Agent$Sessions {
   root: Dialogflow;
-  contexts: Resource$Projects$Agent$Runtimes$Sessions$Contexts;
-  entityTypes: Resource$Projects$Agent$Runtimes$Sessions$Entitytypes;
+  contexts: Resource$Projects$Agent$Sessions$Contexts;
+  entityTypes: Resource$Projects$Agent$Sessions$Entitytypes;
   constructor(root: Dialogflow) {
     this.root = root;
     this.getRoot.bind(this);
-    this.contexts =
-        new Resource$Projects$Agent$Runtimes$Sessions$Contexts(root);
-    this.entityTypes =
-        new Resource$Projects$Agent$Runtimes$Sessions$Entitytypes(root);
+    this.contexts = new Resource$Projects$Agent$Sessions$Contexts(root);
+    this.entityTypes = new Resource$Projects$Agent$Sessions$Entitytypes(root);
   }
 
   getRoot() {
@@ -3803,25 +3777,25 @@ export class Resource$Projects$Agent$Runtimes$Sessions {
 
 
   /**
-   * dialogflow.projects.agent.runtimes.sessions.deleteContexts
+   * dialogflow.projects.agent.sessions.deleteContexts
    * @desc Deletes all active contexts in the specified session.
-   * @alias dialogflow.projects.agent.runtimes.sessions.deleteContexts
+   * @alias dialogflow.projects.agent.sessions.deleteContexts
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {string} params.parent Required. The name of the session to delete all contexts from. Format: `projects/<Project ID>/agent/sessions/<Session ID>` or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified we assume default 'sandbox' runtime.
+   * @param {string} params.parent Required. The name of the session to delete all contexts from. Format: `projects/<Project ID>/agent/sessions/<Session ID>`.
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  deleteContexts(params: any, options?: MethodOptions):
+  deleteContexts(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleProtobufEmpty>;
   deleteContexts(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>): void;
   deleteContexts(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>):
       void|AxiosPromise<Schema$GoogleProtobufEmpty> {
@@ -3857,31 +3831,31 @@ export class Resource$Projects$Agent$Runtimes$Sessions {
 
 
   /**
-   * dialogflow.projects.agent.runtimes.sessions.detectIntent
+   * dialogflow.projects.agent.sessions.detectIntent
    * @desc Processes a natural language query and returns structured, actionable
    * data as a result. This method is not idempotent, because it may cause
    * contexts and session entity types to be updated, which in turn might affect
    * results of future queries.
-   * @alias dialogflow.projects.agent.runtimes.sessions.detectIntent
+   * @alias dialogflow.projects.agent.sessions.detectIntent
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {string} params.session Required. The name of the session this query is sent to. Format: `projects/<Project ID>/agent/sessions/<Session ID>`, or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime. It's up to the API caller to choose an appropriate session ID. It can be a random number or some type of user identifier (preferably hashed). The length of the session ID must not exceed 36 bytes.
+   * @param {string} params.session Required. The name of the session this query is sent to. Format: `projects/<Project ID>/agent/sessions/<Session ID>`. It's up to the API caller to choose an appropriate session ID. It can be a random number or some type of user identifier (preferably hashed). The length of the session ID must not exceed 36 bytes.
    * @param {().GoogleCloudDialogflowV2DetectIntentRequest} params.resource Request body data
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  detectIntent(params: any, options?: MethodOptions):
+  detectIntent(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudDialogflowV2DetectIntentResponse>;
   detectIntent(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2DetectIntentResponse>,
       callback?: BodyResponseCallback<
           Schema$GoogleCloudDialogflowV2DetectIntentResponse>): void;
   detectIntent(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2DetectIntentResponse>,
       callback?: BodyResponseCallback<
@@ -3919,7 +3893,7 @@ export class Resource$Projects$Agent$Runtimes$Sessions {
     }
   }
 }
-export class Resource$Projects$Agent$Runtimes$Sessions$Contexts {
+export class Resource$Projects$Agent$Sessions$Contexts {
   root: Dialogflow;
   constructor(root: Dialogflow) {
     this.root = root;
@@ -3932,28 +3906,28 @@ export class Resource$Projects$Agent$Runtimes$Sessions$Contexts {
 
 
   /**
-   * dialogflow.projects.agent.runtimes.sessions.contexts.create
+   * dialogflow.projects.agent.sessions.contexts.create
    * @desc Creates a context.
-   * @alias dialogflow.projects.agent.runtimes.sessions.contexts.create
+   * @alias dialogflow.projects.agent.sessions.contexts.create
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {string} params.parent Required. The session to create a context for. Format: `projects/<Project ID>/agent/sessions/<Session ID>` or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
+   * @param {string} params.parent Required. The session to create a context for. Format: `projects/<Project ID>/agent/sessions/<Session ID>`.
    * @param {().GoogleCloudDialogflowV2Context} params.resource Request body data
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudDialogflowV2Context>;
   create(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2Context>,
       callback?: BodyResponseCallback<Schema$GoogleCloudDialogflowV2Context>):
       void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2Context>,
       callback?: BodyResponseCallback<Schema$GoogleCloudDialogflowV2Context>):
@@ -3992,25 +3966,25 @@ export class Resource$Projects$Agent$Runtimes$Sessions$Contexts {
 
 
   /**
-   * dialogflow.projects.agent.runtimes.sessions.contexts.delete
+   * dialogflow.projects.agent.sessions.contexts.delete
    * @desc Deletes the specified context.
-   * @alias dialogflow.projects.agent.runtimes.sessions.contexts.delete
+   * @alias dialogflow.projects.agent.sessions.contexts.delete
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {string} params.name Required. The name of the context to delete. Format: `projects/<Project ID>/agent/sessions/<Session ID>/contexts/<Context ID>` or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>/contexts/<Context ID>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
+   * @param {string} params.name Required. The name of the context to delete. Format: `projects/<Project ID>/agent/sessions/<Session ID>/contexts/<Context ID>`.
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions):
+  delete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleProtobufEmpty>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>):
       void|AxiosPromise<Schema$GoogleProtobufEmpty> {
@@ -4045,25 +4019,25 @@ export class Resource$Projects$Agent$Runtimes$Sessions$Contexts {
 
 
   /**
-   * dialogflow.projects.agent.runtimes.sessions.contexts.get
+   * dialogflow.projects.agent.sessions.contexts.get
    * @desc Retrieves the specified context.
-   * @alias dialogflow.projects.agent.runtimes.sessions.contexts.get
+   * @alias dialogflow.projects.agent.sessions.contexts.get
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {string} params.name Required. The name of the context. Format: `projects/<Project ID>/agent/sessions/<Session ID>/contexts/<Context ID>` or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>/contexts/<Context ID>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
+   * @param {string} params.name Required. The name of the context. Format: `projects/<Project ID>/agent/sessions/<Session ID>/contexts/<Context ID>`.
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions):
+  get(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudDialogflowV2Context>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2Context>,
       callback?: BodyResponseCallback<Schema$GoogleCloudDialogflowV2Context>):
       void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2Context>,
       callback?: BodyResponseCallback<Schema$GoogleCloudDialogflowV2Context>):
@@ -4101,29 +4075,29 @@ export class Resource$Projects$Agent$Runtimes$Sessions$Contexts {
 
 
   /**
-   * dialogflow.projects.agent.runtimes.sessions.contexts.list
+   * dialogflow.projects.agent.sessions.contexts.list
    * @desc Returns the list of all contexts in the specified session.
-   * @alias dialogflow.projects.agent.runtimes.sessions.contexts.list
+   * @alias dialogflow.projects.agent.sessions.contexts.list
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
    * @param {integer=} params.pageSize Optional. The maximum number of items to return in a single page. By default 100 and at most 1000.
    * @param {string=} params.pageToken Optional. The next_page_token value returned from a previous list request.
-   * @param {string} params.parent Required. The session to list all contexts from. Format: `projects/<Project ID>/agent/sessions/<Session ID>` or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
+   * @param {string} params.parent Required. The session to list all contexts from. Format: `projects/<Project ID>/agent/sessions/<Session ID>`.
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudDialogflowV2ListContextsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2ListContextsResponse>,
       callback?: BodyResponseCallback<
           Schema$GoogleCloudDialogflowV2ListContextsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2ListContextsResponse>,
       callback?: BodyResponseCallback<
@@ -4163,29 +4137,29 @@ export class Resource$Projects$Agent$Runtimes$Sessions$Contexts {
 
 
   /**
-   * dialogflow.projects.agent.runtimes.sessions.contexts.patch
+   * dialogflow.projects.agent.sessions.contexts.patch
    * @desc Updates the specified context.
-   * @alias dialogflow.projects.agent.runtimes.sessions.contexts.patch
+   * @alias dialogflow.projects.agent.sessions.contexts.patch
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {string} params.name Required. The unique identifier of the context. Format: `projects/<Project ID>/agent/sessions/<Session ID>/contexts/<Context ID>`, or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>/contexts/<Context ID>`. Note: Runtimes are under construction and will be available soon. The Context ID is always converted to lowercase. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
+   * @param {string} params.name Required. The unique identifier of the context. Format: `projects/<Project ID>/agent/sessions/<Session ID>/contexts/<Context ID>`.
    * @param {string=} params.updateMask Optional. The mask to control which fields get updated.
    * @param {().GoogleCloudDialogflowV2Context} params.resource Request body data
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudDialogflowV2Context>;
   patch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2Context>,
       callback?: BodyResponseCallback<Schema$GoogleCloudDialogflowV2Context>):
       void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2Context>,
       callback?: BodyResponseCallback<Schema$GoogleCloudDialogflowV2Context>):
@@ -4222,7 +4196,7 @@ export class Resource$Projects$Agent$Runtimes$Sessions$Contexts {
   }
 }
 
-export class Resource$Projects$Agent$Runtimes$Sessions$Entitytypes {
+export class Resource$Projects$Agent$Sessions$Entitytypes {
   root: Dialogflow;
   constructor(root: Dialogflow) {
     this.root = root;
@@ -4235,28 +4209,28 @@ export class Resource$Projects$Agent$Runtimes$Sessions$Entitytypes {
 
 
   /**
-   * dialogflow.projects.agent.runtimes.sessions.entityTypes.create
+   * dialogflow.projects.agent.sessions.entityTypes.create
    * @desc Creates a session entity type.
-   * @alias dialogflow.projects.agent.runtimes.sessions.entityTypes.create
+   * @alias dialogflow.projects.agent.sessions.entityTypes.create
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {string} params.parent Required. The session to create a session entity type for. Format: `projects/<Project ID>/agent/sessions/<Session ID>` or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
+   * @param {string} params.parent Required. The session to create a session entity type for. Format: `projects/<Project ID>/agent/sessions/<Session ID>`.
    * @param {().GoogleCloudDialogflowV2SessionEntityType} params.resource Request body data
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudDialogflowV2SessionEntityType>;
   create(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2SessionEntityType>,
       callback?: BodyResponseCallback<
           Schema$GoogleCloudDialogflowV2SessionEntityType>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2SessionEntityType>,
       callback?: BodyResponseCallback<
@@ -4296,25 +4270,25 @@ export class Resource$Projects$Agent$Runtimes$Sessions$Entitytypes {
 
 
   /**
-   * dialogflow.projects.agent.runtimes.sessions.entityTypes.delete
+   * dialogflow.projects.agent.sessions.entityTypes.delete
    * @desc Deletes the specified session entity type.
-   * @alias dialogflow.projects.agent.runtimes.sessions.entityTypes.delete
+   * @alias dialogflow.projects.agent.sessions.entityTypes.delete
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {string} params.name Required. The name of the entity type to delete. Format: `projects/<Project ID>/agent/sessions/<Session ID>/entityTypes/<Entity Type Display Name>` or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>/entityTypes/<Entity Type Display Name>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
+   * @param {string} params.name Required. The name of the entity type to delete. Format: `projects/<Project ID>/agent/sessions/<Session ID>/entityTypes/<Entity Type Display Name>`.
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions):
+  delete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleProtobufEmpty>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>):
       void|AxiosPromise<Schema$GoogleProtobufEmpty> {
@@ -4349,25 +4323,25 @@ export class Resource$Projects$Agent$Runtimes$Sessions$Entitytypes {
 
 
   /**
-   * dialogflow.projects.agent.runtimes.sessions.entityTypes.get
+   * dialogflow.projects.agent.sessions.entityTypes.get
    * @desc Retrieves the specified session entity type.
-   * @alias dialogflow.projects.agent.runtimes.sessions.entityTypes.get
+   * @alias dialogflow.projects.agent.sessions.entityTypes.get
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {string} params.name Required. The name of the session entity type. Format: `projects/<Project ID>/agent/sessions/<Session ID>/entityTypes/<Entity Type Display Name>` or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>/entityTypes/<Entity Type Display Name>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
+   * @param {string} params.name Required. The name of the session entity type. Format: `projects/<Project ID>/agent/sessions/<Session ID>/entityTypes/<Entity Type Display Name>`.
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions):
+  get(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudDialogflowV2SessionEntityType>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2SessionEntityType>,
       callback?: BodyResponseCallback<
           Schema$GoogleCloudDialogflowV2SessionEntityType>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2SessionEntityType>,
       callback?: BodyResponseCallback<
@@ -4406,30 +4380,30 @@ export class Resource$Projects$Agent$Runtimes$Sessions$Entitytypes {
 
 
   /**
-   * dialogflow.projects.agent.runtimes.sessions.entityTypes.list
+   * dialogflow.projects.agent.sessions.entityTypes.list
    * @desc Returns the list of all session entity types in the specified
    * session.
-   * @alias dialogflow.projects.agent.runtimes.sessions.entityTypes.list
+   * @alias dialogflow.projects.agent.sessions.entityTypes.list
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
    * @param {integer=} params.pageSize Optional. The maximum number of items to return in a single page. By default 100 and at most 1000.
    * @param {string=} params.pageToken Optional. The next_page_token value returned from a previous list request.
-   * @param {string} params.parent Required. The session to list all session entity types from. Format: `projects/<Project ID>/agent/sessions/<Session ID>` or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
+   * @param {string} params.parent Required. The session to list all session entity types from. Format: `projects/<Project ID>/agent/sessions/<Session ID>`.
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<
+  list(params?: any, options?: MethodOptions): AxiosPromise<
       Schema$GoogleCloudDialogflowV2ListSessionEntityTypesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$GoogleCloudDialogflowV2ListSessionEntityTypesResponse>,
       callback?: BodyResponseCallback<
           Schema$GoogleCloudDialogflowV2ListSessionEntityTypesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$GoogleCloudDialogflowV2ListSessionEntityTypesResponse>,
       callback?: BodyResponseCallback<
@@ -4472,29 +4446,29 @@ export class Resource$Projects$Agent$Runtimes$Sessions$Entitytypes {
 
 
   /**
-   * dialogflow.projects.agent.runtimes.sessions.entityTypes.patch
+   * dialogflow.projects.agent.sessions.entityTypes.patch
    * @desc Updates the specified session entity type.
-   * @alias dialogflow.projects.agent.runtimes.sessions.entityTypes.patch
+   * @alias dialogflow.projects.agent.sessions.entityTypes.patch
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {string} params.name Required. The unique identifier of this session entity type. Format: `projects/<Project ID>/agent/sessions/<Session ID>/entityTypes/<Entity Type Display Name>`, or `projects/<Project ID>/agent/runtimes/<Runtime ID>sessions/<Session ID>/entityTypes/<Entity Type Display Name>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
+   * @param {string} params.name Required. The unique identifier of this session entity type. Format: `projects/<Project ID>/agent/sessions/<Session ID>/entityTypes/<Entity Type Display Name>`.
    * @param {string=} params.updateMask Optional. The mask to control which fields get updated.
    * @param {().GoogleCloudDialogflowV2SessionEntityType} params.resource Request body data
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudDialogflowV2SessionEntityType>;
   patch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2SessionEntityType>,
       callback?: BodyResponseCallback<
           Schema$GoogleCloudDialogflowV2SessionEntityType>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2SessionEntityType>,
       callback?: BodyResponseCallback<
@@ -4534,140 +4508,7 @@ export class Resource$Projects$Agent$Runtimes$Sessions$Entitytypes {
 
 
 
-export class Resource$Projects$Agent$Sessions {
-  root: Dialogflow;
-  contexts: Resource$Projects$Agent$Sessions$Contexts;
-  entityTypes: Resource$Projects$Agent$Sessions$Entitytypes;
-  constructor(root: Dialogflow) {
-    this.root = root;
-    this.getRoot.bind(this);
-    this.contexts = new Resource$Projects$Agent$Sessions$Contexts(root);
-    this.entityTypes = new Resource$Projects$Agent$Sessions$Entitytypes(root);
-  }
-
-  getRoot() {
-    return this.root;
-  }
-
-
-  /**
-   * dialogflow.projects.agent.sessions.deleteContexts
-   * @desc Deletes all active contexts in the specified session.
-   * @alias dialogflow.projects.agent.sessions.deleteContexts
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.parent Required. The name of the session to delete all contexts from. Format: `projects/<Project ID>/agent/sessions/<Session ID>` or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified we assume default 'sandbox' runtime.
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  deleteContexts(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$GoogleProtobufEmpty>;
-  deleteContexts(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
-      callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>): void;
-  deleteContexts(
-      params: any,
-      options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
-      callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>):
-      void|AxiosPromise<Schema$GoogleProtobufEmpty> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://dialogflow.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url: (rootUrl + '/v2/{parent}/contexts')
-                     .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'DELETE'
-          },
-          options),
-      params,
-      requiredParams: ['parent'],
-      pathParams: ['parent'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$GoogleProtobufEmpty>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$GoogleProtobufEmpty>(parameters);
-    }
-  }
-
-
-  /**
-   * dialogflow.projects.agent.sessions.detectIntent
-   * @desc Processes a natural language query and returns structured, actionable
-   * data as a result. This method is not idempotent, because it may cause
-   * contexts and session entity types to be updated, which in turn might affect
-   * results of future queries.
-   * @alias dialogflow.projects.agent.sessions.detectIntent
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.session Required. The name of the session this query is sent to. Format: `projects/<Project ID>/agent/sessions/<Session ID>`, or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime. It's up to the API caller to choose an appropriate session ID. It can be a random number or some type of user identifier (preferably hashed). The length of the session ID must not exceed 36 bytes.
-   * @param {().GoogleCloudDialogflowV2DetectIntentRequest} params.resource Request body data
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  detectIntent(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$GoogleCloudDialogflowV2DetectIntentResponse>;
-  detectIntent(
-      params: any,
-      options: MethodOptions|
-      BodyResponseCallback<Schema$GoogleCloudDialogflowV2DetectIntentResponse>,
-      callback?: BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2DetectIntentResponse>): void;
-  detectIntent(
-      params: any,
-      options?: MethodOptions|
-      BodyResponseCallback<Schema$GoogleCloudDialogflowV2DetectIntentResponse>,
-      callback?: BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2DetectIntentResponse>):
-      void|AxiosPromise<Schema$GoogleCloudDialogflowV2DetectIntentResponse> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://dialogflow.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url: (rootUrl + '/v2/{session}:detectIntent')
-                     .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'POST'
-          },
-          options),
-      params,
-      requiredParams: ['session'],
-      pathParams: ['session'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$GoogleCloudDialogflowV2DetectIntentResponse>(
-          parameters, callback);
-    } else {
-      return createAPIRequest<
-          Schema$GoogleCloudDialogflowV2DetectIntentResponse>(parameters);
-    }
-  }
-}
-export class Resource$Projects$Agent$Sessions$Contexts {
+export class Resource$Projects$Operations {
   root: Dialogflow;
   constructor(root: Dialogflow) {
     this.root = root;
@@ -4680,641 +4521,26 @@ export class Resource$Projects$Agent$Sessions$Contexts {
 
 
   /**
-   * dialogflow.projects.agent.sessions.contexts.create
-   * @desc Creates a context.
-   * @alias dialogflow.projects.agent.sessions.contexts.create
+   * dialogflow.projects.operations.get
+   * @desc Gets the latest state of a long-running operation.  Clients can use
+   * this method to poll the operation result at intervals as recommended by the
+   * API service.
+   * @alias dialogflow.projects.operations.get
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {string} params.parent Required. The session to create a context for. Format: `projects/<Project ID>/agent/sessions/<Session ID>` or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
-   * @param {().GoogleCloudDialogflowV2Context} params.resource Request body data
+   * @param {string} params.name The name of the operation resource.
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$GoogleCloudDialogflowV2Context>;
-  create(
-      params: any,
-      options: MethodOptions|
-      BodyResponseCallback<Schema$GoogleCloudDialogflowV2Context>,
-      callback?: BodyResponseCallback<Schema$GoogleCloudDialogflowV2Context>):
-      void;
-  create(
-      params: any,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$GoogleLongrunningOperation>;
+  get(params?: any,
       options?: MethodOptions|
-      BodyResponseCallback<Schema$GoogleCloudDialogflowV2Context>,
-      callback?: BodyResponseCallback<Schema$GoogleCloudDialogflowV2Context>):
-      void|AxiosPromise<Schema$GoogleCloudDialogflowV2Context> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://dialogflow.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url: (rootUrl + '/v2/{parent}/contexts')
-                     .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'POST'
-          },
-          options),
-      params,
-      requiredParams: ['parent'],
-      pathParams: ['parent'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$GoogleCloudDialogflowV2Context>(
-          parameters, callback);
-    } else {
-      return createAPIRequest<Schema$GoogleCloudDialogflowV2Context>(
-          parameters);
-    }
-  }
-
-
-  /**
-   * dialogflow.projects.agent.sessions.contexts.delete
-   * @desc Deletes the specified context.
-   * @alias dialogflow.projects.agent.sessions.contexts.delete
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.name Required. The name of the context to delete. Format: `projects/<Project ID>/agent/sessions/<Session ID>/contexts/<Context ID>` or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>/contexts/<Context ID>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  delete(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$GoogleProtobufEmpty>;
-  delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
-      callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>): void;
-  delete(
-      params: any,
-      options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
-      callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>):
-      void|AxiosPromise<Schema$GoogleProtobufEmpty> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://dialogflow.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url: (rootUrl + '/v2/{name}').replace(/([^:]\/)\/+/g, '$1'),
-            method: 'DELETE'
-          },
-          options),
-      params,
-      requiredParams: ['name'],
-      pathParams: ['name'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$GoogleProtobufEmpty>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$GoogleProtobufEmpty>(parameters);
-    }
-  }
-
-
-  /**
-   * dialogflow.projects.agent.sessions.contexts.get
-   * @desc Retrieves the specified context.
-   * @alias dialogflow.projects.agent.sessions.contexts.get
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.name Required. The name of the context. Format: `projects/<Project ID>/agent/sessions/<Session ID>/contexts/<Context ID>` or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>/contexts/<Context ID>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  get(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$GoogleCloudDialogflowV2Context>;
-  get(params: any,
-      options: MethodOptions|
-      BodyResponseCallback<Schema$GoogleCloudDialogflowV2Context>,
-      callback?: BodyResponseCallback<Schema$GoogleCloudDialogflowV2Context>):
-      void;
-  get(params: any,
-      options?: MethodOptions|
-      BodyResponseCallback<Schema$GoogleCloudDialogflowV2Context>,
-      callback?: BodyResponseCallback<Schema$GoogleCloudDialogflowV2Context>):
-      void|AxiosPromise<Schema$GoogleCloudDialogflowV2Context> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://dialogflow.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url: (rootUrl + '/v2/{name}').replace(/([^:]\/)\/+/g, '$1'),
-            method: 'GET'
-          },
-          options),
-      params,
-      requiredParams: ['name'],
-      pathParams: ['name'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$GoogleCloudDialogflowV2Context>(
-          parameters, callback);
-    } else {
-      return createAPIRequest<Schema$GoogleCloudDialogflowV2Context>(
-          parameters);
-    }
-  }
-
-
-  /**
-   * dialogflow.projects.agent.sessions.contexts.list
-   * @desc Returns the list of all contexts in the specified session.
-   * @alias dialogflow.projects.agent.sessions.contexts.list
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {integer=} params.pageSize Optional. The maximum number of items to return in a single page. By default 100 and at most 1000.
-   * @param {string=} params.pageToken Optional. The next_page_token value returned from a previous list request.
-   * @param {string} params.parent Required. The session to list all contexts from. Format: `projects/<Project ID>/agent/sessions/<Session ID>` or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  list(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$GoogleCloudDialogflowV2ListContextsResponse>;
-  list(
-      params: any,
-      options: MethodOptions|
-      BodyResponseCallback<Schema$GoogleCloudDialogflowV2ListContextsResponse>,
-      callback?: BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2ListContextsResponse>): void;
-  list(
-      params: any,
-      options?: MethodOptions|
-      BodyResponseCallback<Schema$GoogleCloudDialogflowV2ListContextsResponse>,
-      callback?: BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2ListContextsResponse>):
-      void|AxiosPromise<Schema$GoogleCloudDialogflowV2ListContextsResponse> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://dialogflow.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url: (rootUrl + '/v2/{parent}/contexts')
-                     .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'GET'
-          },
-          options),
-      params,
-      requiredParams: ['parent'],
-      pathParams: ['parent'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$GoogleCloudDialogflowV2ListContextsResponse>(
-          parameters, callback);
-    } else {
-      return createAPIRequest<
-          Schema$GoogleCloudDialogflowV2ListContextsResponse>(parameters);
-    }
-  }
-
-
-  /**
-   * dialogflow.projects.agent.sessions.contexts.patch
-   * @desc Updates the specified context.
-   * @alias dialogflow.projects.agent.sessions.contexts.patch
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.name Required. The unique identifier of the context. Format: `projects/<Project ID>/agent/sessions/<Session ID>/contexts/<Context ID>`, or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>/contexts/<Context ID>`. Note: Runtimes are under construction and will be available soon. The Context ID is always converted to lowercase. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
-   * @param {string=} params.updateMask Optional. The mask to control which fields get updated.
-   * @param {().GoogleCloudDialogflowV2Context} params.resource Request body data
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  patch(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$GoogleCloudDialogflowV2Context>;
-  patch(
-      params: any,
-      options: MethodOptions|
-      BodyResponseCallback<Schema$GoogleCloudDialogflowV2Context>,
-      callback?: BodyResponseCallback<Schema$GoogleCloudDialogflowV2Context>):
-      void;
-  patch(
-      params: any,
-      options?: MethodOptions|
-      BodyResponseCallback<Schema$GoogleCloudDialogflowV2Context>,
-      callback?: BodyResponseCallback<Schema$GoogleCloudDialogflowV2Context>):
-      void|AxiosPromise<Schema$GoogleCloudDialogflowV2Context> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://dialogflow.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url: (rootUrl + '/v2/{name}').replace(/([^:]\/)\/+/g, '$1'),
-            method: 'PATCH'
-          },
-          options),
-      params,
-      requiredParams: ['name'],
-      pathParams: ['name'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$GoogleCloudDialogflowV2Context>(
-          parameters, callback);
-    } else {
-      return createAPIRequest<Schema$GoogleCloudDialogflowV2Context>(
-          parameters);
-    }
-  }
-}
-
-export class Resource$Projects$Agent$Sessions$Entitytypes {
-  root: Dialogflow;
-  constructor(root: Dialogflow) {
-    this.root = root;
-    this.getRoot.bind(this);
-  }
-
-  getRoot() {
-    return this.root;
-  }
-
-
-  /**
-   * dialogflow.projects.agent.sessions.entityTypes.create
-   * @desc Creates a session entity type.
-   * @alias dialogflow.projects.agent.sessions.entityTypes.create
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.parent Required. The session to create a session entity type for. Format: `projects/<Project ID>/agent/sessions/<Session ID>` or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
-   * @param {().GoogleCloudDialogflowV2SessionEntityType} params.resource Request body data
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  create(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$GoogleCloudDialogflowV2SessionEntityType>;
-  create(
-      params: any,
-      options: MethodOptions|
-      BodyResponseCallback<Schema$GoogleCloudDialogflowV2SessionEntityType>,
-      callback?: BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2SessionEntityType>): void;
-  create(
-      params: any,
-      options?: MethodOptions|
-      BodyResponseCallback<Schema$GoogleCloudDialogflowV2SessionEntityType>,
-      callback?: BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2SessionEntityType>):
-      void|AxiosPromise<Schema$GoogleCloudDialogflowV2SessionEntityType> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://dialogflow.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url: (rootUrl + '/v2/{parent}/entityTypes')
-                     .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'POST'
-          },
-          options),
-      params,
-      requiredParams: ['parent'],
-      pathParams: ['parent'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$GoogleCloudDialogflowV2SessionEntityType>(
-          parameters, callback);
-    } else {
-      return createAPIRequest<Schema$GoogleCloudDialogflowV2SessionEntityType>(
-          parameters);
-    }
-  }
-
-
-  /**
-   * dialogflow.projects.agent.sessions.entityTypes.delete
-   * @desc Deletes the specified session entity type.
-   * @alias dialogflow.projects.agent.sessions.entityTypes.delete
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.name Required. The name of the entity type to delete. Format: `projects/<Project ID>/agent/sessions/<Session ID>/entityTypes/<Entity Type Display Name>` or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>/entityTypes/<Entity Type Display Name>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  delete(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$GoogleProtobufEmpty>;
-  delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
-      callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>): void;
-  delete(
-      params: any,
-      options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
-      callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>):
-      void|AxiosPromise<Schema$GoogleProtobufEmpty> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://dialogflow.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url: (rootUrl + '/v2/{name}').replace(/([^:]\/)\/+/g, '$1'),
-            method: 'DELETE'
-          },
-          options),
-      params,
-      requiredParams: ['name'],
-      pathParams: ['name'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$GoogleProtobufEmpty>(parameters, callback);
-    } else {
-      return createAPIRequest<Schema$GoogleProtobufEmpty>(parameters);
-    }
-  }
-
-
-  /**
-   * dialogflow.projects.agent.sessions.entityTypes.get
-   * @desc Retrieves the specified session entity type.
-   * @alias dialogflow.projects.agent.sessions.entityTypes.get
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.name Required. The name of the session entity type. Format: `projects/<Project ID>/agent/sessions/<Session ID>/entityTypes/<Entity Type Display Name>` or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>/entityTypes/<Entity Type Display Name>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  get(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$GoogleCloudDialogflowV2SessionEntityType>;
-  get(params: any,
-      options: MethodOptions|
-      BodyResponseCallback<Schema$GoogleCloudDialogflowV2SessionEntityType>,
-      callback?: BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2SessionEntityType>): void;
-  get(params: any,
-      options?: MethodOptions|
-      BodyResponseCallback<Schema$GoogleCloudDialogflowV2SessionEntityType>,
-      callback?: BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2SessionEntityType>):
-      void|AxiosPromise<Schema$GoogleCloudDialogflowV2SessionEntityType> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://dialogflow.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url: (rootUrl + '/v2/{name}').replace(/([^:]\/)\/+/g, '$1'),
-            method: 'GET'
-          },
-          options),
-      params,
-      requiredParams: ['name'],
-      pathParams: ['name'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$GoogleCloudDialogflowV2SessionEntityType>(
-          parameters, callback);
-    } else {
-      return createAPIRequest<Schema$GoogleCloudDialogflowV2SessionEntityType>(
-          parameters);
-    }
-  }
-
-
-  /**
-   * dialogflow.projects.agent.sessions.entityTypes.list
-   * @desc Returns the list of all session entity types in the specified
-   * session.
-   * @alias dialogflow.projects.agent.sessions.entityTypes.list
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {integer=} params.pageSize Optional. The maximum number of items to return in a single page. By default 100 and at most 1000.
-   * @param {string=} params.pageToken Optional. The next_page_token value returned from a previous list request.
-   * @param {string} params.parent Required. The session to list all session entity types from. Format: `projects/<Project ID>/agent/sessions/<Session ID>` or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  list(params: any, options?: MethodOptions): AxiosPromise<
-      Schema$GoogleCloudDialogflowV2ListSessionEntityTypesResponse>;
-  list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2ListSessionEntityTypesResponse>,
-      callback?: BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2ListSessionEntityTypesResponse>): void;
-  list(
-      params: any,
-      options?: MethodOptions|BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2ListSessionEntityTypesResponse>,
-      callback?: BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2ListSessionEntityTypesResponse>):
-      void|AxiosPromise<
-          Schema$GoogleCloudDialogflowV2ListSessionEntityTypesResponse> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://dialogflow.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url: (rootUrl + '/v2/{parent}/entityTypes')
-                     .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'GET'
-          },
-          options),
-      params,
-      requiredParams: ['parent'],
-      pathParams: ['parent'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<
-          Schema$GoogleCloudDialogflowV2ListSessionEntityTypesResponse>(
-          parameters, callback);
-    } else {
-      return createAPIRequest<
-          Schema$GoogleCloudDialogflowV2ListSessionEntityTypesResponse>(
-          parameters);
-    }
-  }
-
-
-  /**
-   * dialogflow.projects.agent.sessions.entityTypes.patch
-   * @desc Updates the specified session entity type.
-   * @alias dialogflow.projects.agent.sessions.entityTypes.patch
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.name Required. The unique identifier of this session entity type. Format: `projects/<Project ID>/agent/sessions/<Session ID>/entityTypes/<Entity Type Display Name>`, or `projects/<Project ID>/agent/runtimes/<Runtime ID>sessions/<Session ID>/entityTypes/<Entity Type Display Name>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
-   * @param {string=} params.updateMask Optional. The mask to control which fields get updated.
-   * @param {().GoogleCloudDialogflowV2SessionEntityType} params.resource Request body data
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  patch(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$GoogleCloudDialogflowV2SessionEntityType>;
-  patch(
-      params: any,
-      options: MethodOptions|
-      BodyResponseCallback<Schema$GoogleCloudDialogflowV2SessionEntityType>,
-      callback?: BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2SessionEntityType>): void;
-  patch(
-      params: any,
-      options?: MethodOptions|
-      BodyResponseCallback<Schema$GoogleCloudDialogflowV2SessionEntityType>,
-      callback?: BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2SessionEntityType>):
-      void|AxiosPromise<Schema$GoogleCloudDialogflowV2SessionEntityType> {
-    if (typeof options === 'function') {
-      callback = options;
-      options = {};
-    }
-    if (typeof params === 'function') {
-      callback = params;
-      params = {};
-    }
-    options = options || {};
-    const rootUrl = options.rootUrl || 'https://dialogflow.googleapis.com/';
-    const parameters = {
-      options: Object.assign(
-          {
-            url: (rootUrl + '/v2/{name}').replace(/([^:]\/)\/+/g, '$1'),
-            method: 'PATCH'
-          },
-          options),
-      params,
-      requiredParams: ['name'],
-      pathParams: ['name'],
-      context: this.getRoot()
-    };
-    if (callback) {
-      createAPIRequest<Schema$GoogleCloudDialogflowV2SessionEntityType>(
-          parameters, callback);
-    } else {
-      return createAPIRequest<Schema$GoogleCloudDialogflowV2SessionEntityType>(
-          parameters);
-    }
-  }
-}
-
-
-
-export class Resource$Projects$Operations {
-  root: Dialogflow;
-  constructor(root: Dialogflow) {
-    this.root = root;
-    this.getRoot.bind(this);
-  }
-
-  getRoot() {
-    return this.root;
-  }
-
-
-  /**
-   * dialogflow.projects.operations.get
-   * @desc Gets the latest state of a long-running operation.  Clients can use
-   * this method to poll the operation result at intervals as recommended by the
-   * API service.
-   * @alias dialogflow.projects.operations.get
-   * @memberOf! ()
-   *
-   * @param {object} params Parameters for request
-   * @param {string} params.name The name of the operation resource.
-   * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
-   * @param {callback} callback The callback that handles the response.
-   * @return {object} Request object
-   */
-  get(params: any,
-      options?: MethodOptions): AxiosPromise<Schema$GoogleLongrunningOperation>;
-  get(params: any,
-      options: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>):
diff --git a/src/apis/dialogflow/v2beta1.ts b/src/apis/dialogflow/v2beta1.ts
index 508d412648..48772f62c6 100644
--- a/src/apis/dialogflow/v2beta1.ts
+++ b/src/apis/dialogflow/v2beta1.ts
@@ -88,7 +88,7 @@ export interface Schema$GoogleCloudDialogflowV2BatchUpdateIntentsResponse {
 export interface Schema$GoogleCloudDialogflowV2beta1Agent {
   /**
    * Optional. The URI of the agent&#39;s avatar. Avatars are used throughout
-   * API.AI console and in the self-hosted [Web
+   * the Dialogflow console and in the self-hosted [Web
    * Demo](https://dialogflow.com/docs/integrations/web-demo) integration.
    */
   avatarUri: string;
@@ -306,11 +306,12 @@ export interface Schema$GoogleCloudDialogflowV2beta1Context {
    * Required. The unique identifier of the context. Format:
    * `projects/&lt;Project ID&gt;/agent/sessions/&lt;Session
    * ID&gt;/contexts/&lt;Context ID&gt;`, or `projects/&lt;Project
-   * ID&gt;/agent/runtimes/&lt;Runtime ID&gt;/sessions/&lt;Session
-   * ID&gt;/contexts/&lt;Context ID&gt;`. Note: Runtimes are under construction
-   * and will be available soon. The Context ID is always converted to
-   * lowercase. If &lt;Runtime ID&gt; is not specified, we assume default
-   * &#39;sandbox&#39; runtime.
+   * ID&gt;/agent/environments/&lt;Environment ID&gt;/users/&lt;User
+   * ID&gt;/sessions/&lt;Session ID&gt;/contexts/&lt;Context ID&gt;`. Note:
+   * Environments and users are under construction and will be available soon.
+   * The Context ID is always converted to lowercase. If &lt;Environment ID&gt;
+   * is not specified, we assume default &#39;draft&#39; environment. If
+   * &lt;User ID&gt; is not specified, we assume default &#39;-&#39; user.
    */
   name: string;
   /**
@@ -563,7 +564,7 @@ export interface Schema$GoogleCloudDialogflowV2beta1Intent {
   isFallback: boolean;
   /**
    * Optional. The collection of rich messages corresponding to the `Response`
-   * field in API.AI console.
+   * field in the Dialogflow console.
    */
   messages: Schema$GoogleCloudDialogflowV2beta1IntentMessage[];
   /**
@@ -659,7 +660,7 @@ export interface Schema$GoogleCloudDialogflowV2beta1IntentFollowupIntentInfo {
   parentFollowupIntentName: string;
 }
 /**
- * Corresponds to the `Response` field in API.AI console.
+ * Corresponds to the `Response` field in the Dialogflow console.
  */
 export interface Schema$GoogleCloudDialogflowV2beta1IntentMessage {
   /**
@@ -1351,11 +1352,13 @@ export interface Schema$GoogleCloudDialogflowV2beta1SessionEntityType {
    * Required. The unique identifier of this session entity type. Format:
    * `projects/&lt;Project ID&gt;/agent/sessions/&lt;Session
    * ID&gt;/entityTypes/&lt;Entity Type Display Name&gt;`, or
-   * `projects/&lt;Project ID&gt;/agent/runtimes/&lt;Runtime
-   * ID&gt;sessions/&lt;Session ID&gt;/entityTypes/&lt;Entity Type Display
-   * Name&gt;`. Note: Runtimes are under construction and will be available
-   * soon. If &lt;Runtime ID&gt; is not specified, we assume default
-   * &#39;sandbox&#39; runtime.
+   * `projects/&lt;Project ID&gt;/agent/environments/&lt;Environment
+   * ID&gt;/users/&lt;User ID&gt;/sessions /&lt;Session
+   * ID&gt;/entityTypes/&lt;Entity Type Display Name&gt;`. Note: Environments
+   * and users are under construction and will be available soon. If
+   * &lt;Environment ID&gt; is not specified, we assume default &#39;draft&#39;
+   * environment. If &lt;User ID&gt; is not specified, we assume default
+   * &#39;-&#39; user.
    */
   name: string;
 }
@@ -1454,12 +1457,7 @@ export interface Schema$GoogleCloudDialogflowV2Context {
   /**
    * Required. The unique identifier of the context. Format:
    * `projects/&lt;Project ID&gt;/agent/sessions/&lt;Session
-   * ID&gt;/contexts/&lt;Context ID&gt;`, or `projects/&lt;Project
-   * ID&gt;/agent/runtimes/&lt;Runtime ID&gt;/sessions/&lt;Session
-   * ID&gt;/contexts/&lt;Context ID&gt;`. Note: Runtimes are under construction
-   * and will be available soon. The Context ID is always converted to
-   * lowercase. If &lt;Runtime ID&gt; is not specified, we assume default
-   * &#39;sandbox&#39; runtime.
+   * ID&gt;/contexts/&lt;Context ID&gt;`.
    */
   name: string;
   /**
@@ -1601,7 +1599,7 @@ export interface Schema$GoogleCloudDialogflowV2Intent {
   isFallback: boolean;
   /**
    * Optional. The collection of rich messages corresponding to the `Response`
-   * field in API.AI console.
+   * field in the Dialogflow console.
    */
   messages: Schema$GoogleCloudDialogflowV2IntentMessage[];
   /**
@@ -1677,7 +1675,7 @@ export interface Schema$GoogleCloudDialogflowV2IntentFollowupIntentInfo {
   parentFollowupIntentName: string;
 }
 /**
- * Corresponds to the `Response` field in API.AI console.
+ * Corresponds to the `Response` field in the Dialogflow console.
  */
 export interface Schema$GoogleCloudDialogflowV2IntentMessage {
   /**
@@ -2397,16 +2395,16 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getAgent(params: any, options?: MethodOptions):
+  getAgent(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudDialogflowV2beta1Agent>;
   getAgent(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Agent>,
       callback?:
           BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Agent>): void;
   getAgent(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Agent>,
       callback?:
@@ -2447,15 +2445,15 @@ export class Resource$Projects {
 export class Resource$Projects$Agent {
   root: Dialogflow;
   entityTypes: Resource$Projects$Agent$Entitytypes;
+  environments: Resource$Projects$Agent$Environments;
   intents: Resource$Projects$Agent$Intents;
-  runtimes: Resource$Projects$Agent$Runtimes;
   sessions: Resource$Projects$Agent$Sessions;
   constructor(root: Dialogflow) {
     this.root = root;
     this.getRoot.bind(this);
     this.entityTypes = new Resource$Projects$Agent$Entitytypes(root);
+    this.environments = new Resource$Projects$Agent$Environments(root);
     this.intents = new Resource$Projects$Agent$Intents(root);
-    this.runtimes = new Resource$Projects$Agent$Runtimes(root);
     this.sessions = new Resource$Projects$Agent$Sessions(root);
   }
 
@@ -2478,15 +2476,15 @@ export class Resource$Projects$Agent {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  export(params: any, options?: MethodOptions):
+  export(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleLongrunningOperation>;
   export(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
   export(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>):
@@ -2539,9 +2537,9 @@ export class Resource$Projects$Agent {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-import(params: any, options?: MethodOptions): AxiosPromise<Schema$GoogleLongrunningOperation>;
-import(params: any, options: MethodOptions|BodyResponseCallback<Schema$GoogleLongrunningOperation>, callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
-import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$GoogleLongrunningOperation>, callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void|AxiosPromise<Schema$GoogleLongrunningOperation> {if(typeof options === 'function') {
+import(params?: any, options?: MethodOptions): AxiosPromise<Schema$GoogleLongrunningOperation>;
+import(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$GoogleLongrunningOperation>, callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
+import(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$GoogleLongrunningOperation>, callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void|AxiosPromise<Schema$GoogleLongrunningOperation> {if(typeof options === 'function') {
     callback = options;
     options = {};
   } if(typeof params === 'function') {
@@ -2567,14 +2565,14 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$GoogleLo
  * @param {callback} callback The callback that handles the response.
  * @return {object} Request object
  */
-  restore(params: any, options?: MethodOptions): AxiosPromise<Schema$GoogleLongrunningOperation>;
+  restore(params?: any, options?: MethodOptions): AxiosPromise<Schema$GoogleLongrunningOperation>;
   restore(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
   restore(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>):
@@ -2628,16 +2626,16 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$GoogleLo
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  search(params: any, options?: MethodOptions):
+  search(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudDialogflowV2beta1SearchAgentsResponse>;
   search(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$GoogleCloudDialogflowV2beta1SearchAgentsResponse>,
       callback?: BodyResponseCallback<
           Schema$GoogleCloudDialogflowV2beta1SearchAgentsResponse>): void;
   search(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$GoogleCloudDialogflowV2beta1SearchAgentsResponse>,
       callback?: BodyResponseCallback<
@@ -2690,15 +2688,15 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$GoogleLo
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  train(params: any, options?: MethodOptions):
+  train(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleLongrunningOperation>;
   train(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
   train(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>):
@@ -2761,15 +2759,15 @@ export class Resource$Projects$Agent$Entitytypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchDelete(params: any, options?: MethodOptions):
+  batchDelete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleLongrunningOperation>;
   batchDelete(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
   batchDelete(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>):
@@ -2820,15 +2818,15 @@ export class Resource$Projects$Agent$Entitytypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchUpdate(params: any, options?: MethodOptions):
+  batchUpdate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleLongrunningOperation>;
   batchUpdate(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
   batchUpdate(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>):
@@ -2878,17 +2876,17 @@ export class Resource$Projects$Agent$Entitytypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudDialogflowV2beta1EntityType>;
   create(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1EntityType>,
       callback?:
           BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1EntityType>):
       void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1EntityType>,
       callback?:
@@ -2939,14 +2937,14 @@ export class Resource$Projects$Agent$Entitytypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions):
+  delete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleProtobufEmpty>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>):
       void|AxiosPromise<Schema$GoogleProtobufEmpty> {
@@ -2993,15 +2991,15 @@ export class Resource$Projects$Agent$Entitytypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions):
+  get(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudDialogflowV2beta1EntityType>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1EntityType>,
       callback?:
           BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1EntityType>):
       void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1EntityType>,
       callback?:
@@ -3054,16 +3052,16 @@ export class Resource$Projects$Agent$Entitytypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudDialogflowV2beta1ListEntityTypesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$GoogleCloudDialogflowV2beta1ListEntityTypesResponse>,
       callback?: BodyResponseCallback<
           Schema$GoogleCloudDialogflowV2beta1ListEntityTypesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$GoogleCloudDialogflowV2beta1ListEntityTypesResponse>,
       callback?: BodyResponseCallback<
@@ -3119,17 +3117,17 @@ export class Resource$Projects$Agent$Entitytypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudDialogflowV2beta1EntityType>;
   patch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1EntityType>,
       callback?:
           BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1EntityType>):
       void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1EntityType>,
       callback?:
@@ -3193,15 +3191,15 @@ export class Resource$Projects$Agent$Entitytypes$Entities {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchCreate(params: any, options?: MethodOptions):
+  batchCreate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleLongrunningOperation>;
   batchCreate(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
   batchCreate(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>):
@@ -3251,15 +3249,15 @@ export class Resource$Projects$Agent$Entitytypes$Entities {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchDelete(params: any, options?: MethodOptions):
+  batchDelete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleLongrunningOperation>;
   batchDelete(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
   batchDelete(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>):
@@ -3310,15 +3308,15 @@ export class Resource$Projects$Agent$Entitytypes$Entities {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchUpdate(params: any, options?: MethodOptions):
+  batchUpdate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleLongrunningOperation>;
   batchUpdate(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
   batchUpdate(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>):
@@ -3355,11 +3353,45 @@ export class Resource$Projects$Agent$Entitytypes$Entities {
 }
 
 
-export class Resource$Projects$Agent$Intents {
+export class Resource$Projects$Agent$Environments {
+  root: Dialogflow;
+  users: Resource$Projects$Agent$Environments$Users;
+  constructor(root: Dialogflow) {
+    this.root = root;
+    this.getRoot.bind(this);
+    this.users = new Resource$Projects$Agent$Environments$Users(root);
+  }
+
+  getRoot() {
+    return this.root;
+  }
+}
+export class Resource$Projects$Agent$Environments$Users {
+  root: Dialogflow;
+  sessions: Resource$Projects$Agent$Environments$Users$Sessions;
+  constructor(root: Dialogflow) {
+    this.root = root;
+    this.getRoot.bind(this);
+    this.sessions =
+        new Resource$Projects$Agent$Environments$Users$Sessions(root);
+  }
+
+  getRoot() {
+    return this.root;
+  }
+}
+export class Resource$Projects$Agent$Environments$Users$Sessions {
   root: Dialogflow;
+  contexts: Resource$Projects$Agent$Environments$Users$Sessions$Contexts;
+  entityTypes: Resource$Projects$Agent$Environments$Users$Sessions$Entitytypes;
   constructor(root: Dialogflow) {
     this.root = root;
     this.getRoot.bind(this);
+    this.contexts =
+        new Resource$Projects$Agent$Environments$Users$Sessions$Contexts(root);
+    this.entityTypes =
+        new Resource$Projects$Agent$Environments$Users$Sessions$Entitytypes(
+            root);
   }
 
   getRoot() {
@@ -3368,32 +3400,28 @@ export class Resource$Projects$Agent$Intents {
 
 
   /**
-   * dialogflow.projects.agent.intents.batchDelete
-   * @desc Deletes intents in the specified agent.  Operation <response:
-   * google.protobuf.Empty>
-   * @alias dialogflow.projects.agent.intents.batchDelete
+   * dialogflow.projects.agent.environments.users.sessions.deleteContexts
+   * @desc Deletes all active contexts in the specified session.
+   * @alias dialogflow.projects.agent.environments.users.sessions.deleteContexts
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {string} params.parent Required. The name of the agent to delete all entities types for. Format: `projects/<Project ID>/agent`.
-   * @param {().GoogleCloudDialogflowV2beta1BatchDeleteIntentsRequest} params.resource Request body data
+   * @param {string} params.parent Required. The name of the session to delete all contexts from. Format: `projects/<Project ID>/agent/sessions/<Session ID>` or `projects/<Project ID>/agent/environments/<Environment ID>/users/<User ID>/sessions/<Session ID>`. Note: Environments and users are under construction and will be available soon. If <Environment ID> is not specified we assume default 'draft' environment. If <User ID> is not specified, we assume default '-' user.
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchDelete(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$GoogleLongrunningOperation>;
-  batchDelete(
-      params: any,
-      options: MethodOptions|
-      BodyResponseCallback<Schema$GoogleLongrunningOperation>,
-      callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
-  batchDelete(
-      params: any,
-      options?: MethodOptions|
-      BodyResponseCallback<Schema$GoogleLongrunningOperation>,
-      callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>):
-      void|AxiosPromise<Schema$GoogleLongrunningOperation> {
+  deleteContexts(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$GoogleProtobufEmpty>;
+  deleteContexts(
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
+      callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>): void;
+  deleteContexts(
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
+      callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>):
+      void|AxiosPromise<Schema$GoogleProtobufEmpty> {
     if (typeof options === 'function') {
       callback = options;
       options = {};
@@ -3407,9 +3435,9 @@ export class Resource$Projects$Agent$Intents {
     const parameters = {
       options: Object.assign(
           {
-            url: (rootUrl + '/v2beta1/{parent}/intents:batchDelete')
+            url: (rootUrl + '/v2beta1/{parent}/contexts')
                      .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'POST'
+            method: 'DELETE'
           },
           options),
       params,
@@ -3418,40 +3446,44 @@ export class Resource$Projects$Agent$Intents {
       context: this.getRoot()
     };
     if (callback) {
-      createAPIRequest<Schema$GoogleLongrunningOperation>(parameters, callback);
+      createAPIRequest<Schema$GoogleProtobufEmpty>(parameters, callback);
     } else {
-      return createAPIRequest<Schema$GoogleLongrunningOperation>(parameters);
+      return createAPIRequest<Schema$GoogleProtobufEmpty>(parameters);
     }
   }
 
 
   /**
-   * dialogflow.projects.agent.intents.batchUpdate
-   * @desc Updates/Creates multiple intents in the specified agent.  Operation
-   * <response: BatchUpdateIntentsResponse>
-   * @alias dialogflow.projects.agent.intents.batchUpdate
+   * dialogflow.projects.agent.environments.users.sessions.detectIntent
+   * @desc Processes a natural language query and returns structured, actionable
+   * data as a result. This method is not idempotent, because it may cause
+   * contexts and session entity types to be updated, which in turn might affect
+   * results of future queries.
+   * @alias dialogflow.projects.agent.environments.users.sessions.detectIntent
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {string} params.parent Required. The name of the agent to update or create intents in. Format: `projects/<Project ID>/agent`.
-   * @param {().GoogleCloudDialogflowV2beta1BatchUpdateIntentsRequest} params.resource Request body data
+   * @param {string} params.session Required. The name of the session this query is sent to. Format: `projects/<Project ID>/agent/sessions/<Session ID>`, or `projects/<Project ID>/agent/environments/<Environment ID>/users/<User ID>/sessions/<Session ID>`. Note: Environments and users are under construction and will be available soon. If <Environment ID> is not specified, we assume default 'draft' environment. If <User ID> is not specified, we are using "-". It’s up to the API caller to choose an appropriate <Session ID>. and <User Id>. They can be a random numbers or some type of user and session identifiers (preferably hashed). The length of the <Session ID> and <User ID> must not exceed 36 characters.
+   * @param {().GoogleCloudDialogflowV2beta1DetectIntentRequest} params.resource Request body data
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchUpdate(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$GoogleLongrunningOperation>;
-  batchUpdate(
-      params: any,
-      options: MethodOptions|
-      BodyResponseCallback<Schema$GoogleLongrunningOperation>,
-      callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
-  batchUpdate(
-      params: any,
-      options?: MethodOptions|
-      BodyResponseCallback<Schema$GoogleLongrunningOperation>,
-      callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>):
-      void|AxiosPromise<Schema$GoogleLongrunningOperation> {
+  detectIntent(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$GoogleCloudDialogflowV2beta1DetectIntentResponse>;
+  detectIntent(
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
+          Schema$GoogleCloudDialogflowV2beta1DetectIntentResponse>,
+      callback?: BodyResponseCallback<
+          Schema$GoogleCloudDialogflowV2beta1DetectIntentResponse>): void;
+  detectIntent(
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
+          Schema$GoogleCloudDialogflowV2beta1DetectIntentResponse>,
+      callback?: BodyResponseCallback<
+          Schema$GoogleCloudDialogflowV2beta1DetectIntentResponse>): void|
+      AxiosPromise<Schema$GoogleCloudDialogflowV2beta1DetectIntentResponse> {
     if (typeof options === 'function') {
       callback = options;
       options = {};
@@ -3465,55 +3497,67 @@ export class Resource$Projects$Agent$Intents {
     const parameters = {
       options: Object.assign(
           {
-            url: (rootUrl + '/v2beta1/{parent}/intents:batchUpdate')
+            url: (rootUrl + '/v2beta1/{session}:detectIntent')
                      .replace(/([^:]\/)\/+/g, '$1'),
             method: 'POST'
           },
           options),
       params,
-      requiredParams: ['parent'],
-      pathParams: ['parent'],
+      requiredParams: ['session'],
+      pathParams: ['session'],
       context: this.getRoot()
     };
     if (callback) {
-      createAPIRequest<Schema$GoogleLongrunningOperation>(parameters, callback);
+      createAPIRequest<Schema$GoogleCloudDialogflowV2beta1DetectIntentResponse>(
+          parameters, callback);
     } else {
-      return createAPIRequest<Schema$GoogleLongrunningOperation>(parameters);
+      return createAPIRequest<
+          Schema$GoogleCloudDialogflowV2beta1DetectIntentResponse>(parameters);
     }
   }
+}
+export class Resource$Projects$Agent$Environments$Users$Sessions$Contexts {
+  root: Dialogflow;
+  constructor(root: Dialogflow) {
+    this.root = root;
+    this.getRoot.bind(this);
+  }
+
+  getRoot() {
+    return this.root;
+  }
 
 
   /**
-   * dialogflow.projects.agent.intents.create
-   * @desc Creates an intent in the specified agent.
-   * @alias dialogflow.projects.agent.intents.create
+   * dialogflow.projects.agent.environments.users.sessions.contexts.create
+   * @desc Creates a context.
+   * @alias
+   * dialogflow.projects.agent.environments.users.sessions.contexts.create
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {string=} params.intentView Optional. The resource view to apply to the returned intent.
-   * @param {string=} params.languageCode Optional. The language of training phrases, parameters and rich messages defined in `intent`. If not specified, the agent's default language is used. [More than a dozen languages](https://dialogflow.com/docs/reference/language) are supported. Note: languages must be enabled in the agent, before they can be used.
-   * @param {string} params.parent Required. The agent to create a intent for. Format: `projects/<Project ID>/agent`.
-   * @param {().GoogleCloudDialogflowV2beta1Intent} params.resource Request body data
+   * @param {string} params.parent Required. The session to create a context for. Format: `projects/<Project ID>/agent/sessions/<Session ID>` or `projects/<Project ID>/agent/environments/<Environment ID>/users/<User ID>/sessions/<Session ID>`. Note: Environments and users are under construction and will be available soon. If <Environment ID> is not specified, we assume default 'draft' environment. If <User ID> is not specified, we assume default '-' user.
+   * @param {().GoogleCloudDialogflowV2beta1Context} params.resource Request body data
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$GoogleCloudDialogflowV2beta1Intent>;
+  create(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$GoogleCloudDialogflowV2beta1Context>;
   create(
-      params: any,
-      options: MethodOptions|
-      BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Intent>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Context>,
       callback?:
-          BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Intent>):
+          BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Context>):
       void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|
-      BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Intent>,
+      BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Context>,
       callback?:
-          BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Intent>):
-      void|AxiosPromise<Schema$GoogleCloudDialogflowV2beta1Intent> {
+          BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Context>):
+      void|AxiosPromise<Schema$GoogleCloudDialogflowV2beta1Context> {
     if (typeof options === 'function') {
       callback = options;
       options = {};
@@ -3527,7 +3571,7 @@ export class Resource$Projects$Agent$Intents {
     const parameters = {
       options: Object.assign(
           {
-            url: (rootUrl + '/v2beta1/{parent}/intents')
+            url: (rootUrl + '/v2beta1/{parent}/contexts')
                      .replace(/([^:]\/)\/+/g, '$1'),
             method: 'POST'
           },
@@ -3538,35 +3582,36 @@ export class Resource$Projects$Agent$Intents {
       context: this.getRoot()
     };
     if (callback) {
-      createAPIRequest<Schema$GoogleCloudDialogflowV2beta1Intent>(
+      createAPIRequest<Schema$GoogleCloudDialogflowV2beta1Context>(
           parameters, callback);
     } else {
-      return createAPIRequest<Schema$GoogleCloudDialogflowV2beta1Intent>(
+      return createAPIRequest<Schema$GoogleCloudDialogflowV2beta1Context>(
           parameters);
     }
   }
 
 
   /**
-   * dialogflow.projects.agent.intents.delete
-   * @desc Deletes the specified intent.
-   * @alias dialogflow.projects.agent.intents.delete
+   * dialogflow.projects.agent.environments.users.sessions.contexts.delete
+   * @desc Deletes the specified context.
+   * @alias
+   * dialogflow.projects.agent.environments.users.sessions.contexts.delete
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {string} params.name Required. The name of the intent to delete. Format: `projects/<Project ID>/agent/intents/<Intent ID>`.
+   * @param {string} params.name Required. The name of the context to delete. Format: `projects/<Project ID>/agent/sessions/<Session ID>/contexts/<Context ID>` or `projects/<Project ID>/agent/environments/<Environment ID>/users/<User ID>/sessions/<Session ID>/contexts/<Context ID>`. Note: Environments and users are under construction and will be available soon. If <Environment ID> is not specified, we assume default 'draft' environment. If <User ID> is not specified, we assume default '-' user.
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions):
+  delete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleProtobufEmpty>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>):
       void|AxiosPromise<Schema$GoogleProtobufEmpty> {
@@ -3601,33 +3646,31 @@ export class Resource$Projects$Agent$Intents {
 
 
   /**
-   * dialogflow.projects.agent.intents.get
-   * @desc Retrieves the specified intent.
-   * @alias dialogflow.projects.agent.intents.get
+   * dialogflow.projects.agent.environments.users.sessions.contexts.get
+   * @desc Retrieves the specified context.
+   * @alias dialogflow.projects.agent.environments.users.sessions.contexts.get
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {string=} params.intentView Optional. The resource view to apply to the returned intent.
-   * @param {string=} params.languageCode Optional. The language to retrieve training phrases, parameters and rich messages for. If not specified, the agent's default language is used. [More than a dozen languages](https://dialogflow.com/docs/reference/language) are supported. Note: languages must be enabled in the agent, before they can be used.
-   * @param {string} params.name Required. The name of the intent. Format: `projects/<Project ID>/agent/intents/<Intent ID>`.
+   * @param {string} params.name Required. The name of the context. Format: `projects/<Project ID>/agent/sessions/<Session ID>/contexts/<Context ID>` or `projects/<Project ID>/agent/environments/<Environment ID>/users/<User ID>/sessions/<Session ID>/contexts/<Context ID>`. Note: Environments and users are under construction and will be available soon. If <Environment ID> is not specified, we assume default 'draft' environment. If <User ID> is not specified, we assume default '-' user.
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$GoogleCloudDialogflowV2beta1Intent>;
-  get(params: any,
-      options: MethodOptions|
-      BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Intent>,
+  get(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$GoogleCloudDialogflowV2beta1Context>;
+  get(params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Context>,
       callback?:
-          BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Intent>):
+          BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Context>):
       void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
-      BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Intent>,
+      BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Context>,
       callback?:
-          BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Intent>):
-      void|AxiosPromise<Schema$GoogleCloudDialogflowV2beta1Intent> {
+          BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Context>):
+      void|AxiosPromise<Schema$GoogleCloudDialogflowV2beta1Context> {
     if (typeof options === 'function') {
       callback = options;
       options = {};
@@ -3651,46 +3694,44 @@ export class Resource$Projects$Agent$Intents {
       context: this.getRoot()
     };
     if (callback) {
-      createAPIRequest<Schema$GoogleCloudDialogflowV2beta1Intent>(
+      createAPIRequest<Schema$GoogleCloudDialogflowV2beta1Context>(
           parameters, callback);
     } else {
-      return createAPIRequest<Schema$GoogleCloudDialogflowV2beta1Intent>(
+      return createAPIRequest<Schema$GoogleCloudDialogflowV2beta1Context>(
           parameters);
     }
   }
 
 
   /**
-   * dialogflow.projects.agent.intents.list
-   * @desc Returns the list of all intents in the specified agent.
-   * @alias dialogflow.projects.agent.intents.list
+   * dialogflow.projects.agent.environments.users.sessions.contexts.list
+   * @desc Returns the list of all contexts in the specified session.
+   * @alias dialogflow.projects.agent.environments.users.sessions.contexts.list
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {string=} params.intentView Optional. The resource view to apply to the returned intent.
-   * @param {string=} params.languageCode Optional. The language to list training phrases, parameters and rich messages for. If not specified, the agent's default language is used. [More than a dozen languages](https://dialogflow.com/docs/reference/language) are supported. Note: languages must be enabled in the agent before they can be used.
    * @param {integer=} params.pageSize Optional. The maximum number of items to return in a single page. By default 100 and at most 1000.
    * @param {string=} params.pageToken Optional. The next_page_token value returned from a previous list request.
-   * @param {string} params.parent Required. The agent to list all intents from. Format: `projects/<Project ID>/agent`.
+   * @param {string} params.parent Required. The session to list all contexts from. Format: `projects/<Project ID>/agent/sessions/<Session ID>` or `projects/<Project ID>/agent/environments/<Environment ID>/users/<User ID>/sessions/<Session ID>`. Note: Environments and users are under construction and will be available soon. If <Environment ID> is not specified, we assume default 'draft' environment. If <User ID> is not specified, we assume default '-' user.
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$GoogleCloudDialogflowV2beta1ListIntentsResponse>;
+  list(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$GoogleCloudDialogflowV2beta1ListContextsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2beta1ListIntentsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
+          Schema$GoogleCloudDialogflowV2beta1ListContextsResponse>,
       callback?: BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2beta1ListIntentsResponse>): void;
+          Schema$GoogleCloudDialogflowV2beta1ListContextsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2beta1ListIntentsResponse>,
+          Schema$GoogleCloudDialogflowV2beta1ListContextsResponse>,
       callback?: BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2beta1ListIntentsResponse>): void|
-      AxiosPromise<Schema$GoogleCloudDialogflowV2beta1ListIntentsResponse> {
+          Schema$GoogleCloudDialogflowV2beta1ListContextsResponse>): void|
+      AxiosPromise<Schema$GoogleCloudDialogflowV2beta1ListContextsResponse> {
     if (typeof options === 'function') {
       callback = options;
       options = {};
@@ -3704,7 +3745,7 @@ export class Resource$Projects$Agent$Intents {
     const parameters = {
       options: Object.assign(
           {
-            url: (rootUrl + '/v2beta1/{parent}/intents')
+            url: (rootUrl + '/v2beta1/{parent}/contexts')
                      .replace(/([^:]\/)\/+/g, '$1'),
             method: 'GET'
           },
@@ -3715,47 +3756,45 @@ export class Resource$Projects$Agent$Intents {
       context: this.getRoot()
     };
     if (callback) {
-      createAPIRequest<Schema$GoogleCloudDialogflowV2beta1ListIntentsResponse>(
+      createAPIRequest<Schema$GoogleCloudDialogflowV2beta1ListContextsResponse>(
           parameters, callback);
     } else {
       return createAPIRequest<
-          Schema$GoogleCloudDialogflowV2beta1ListIntentsResponse>(parameters);
+          Schema$GoogleCloudDialogflowV2beta1ListContextsResponse>(parameters);
     }
   }
 
 
   /**
-   * dialogflow.projects.agent.intents.patch
-   * @desc Updates the specified intent.
-   * @alias dialogflow.projects.agent.intents.patch
+   * dialogflow.projects.agent.environments.users.sessions.contexts.patch
+   * @desc Updates the specified context.
+   * @alias dialogflow.projects.agent.environments.users.sessions.contexts.patch
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {string=} params.intentView Optional. The resource view to apply to the returned intent.
-   * @param {string=} params.languageCode Optional. The language of training phrases, parameters and rich messages defined in `intent`. If not specified, the agent's default language is used. [More than a dozen languages](https://dialogflow.com/docs/reference/language) are supported. Note: languages must be enabled in the agent, before they can be used.
-   * @param {string} params.name Required for all methods except `create` (`create` populates the name automatically. The unique identifier of this intent. Format: `projects/<Project ID>/agent/intents/<Intent ID>`.
+   * @param {string} params.name Required. The unique identifier of the context. Format: `projects/<Project ID>/agent/sessions/<Session ID>/contexts/<Context ID>`, or `projects/<Project ID>/agent/environments/<Environment ID>/users/<User ID>/sessions/<Session ID>/contexts/<Context ID>`. Note: Environments and users are under construction and will be available soon. The Context ID is always converted to lowercase. If <Environment ID> is not specified, we assume default 'draft' environment. If <User ID> is not specified, we assume default '-' user.
    * @param {string=} params.updateMask Optional. The mask to control which fields get updated.
-   * @param {().GoogleCloudDialogflowV2beta1Intent} params.resource Request body data
+   * @param {().GoogleCloudDialogflowV2beta1Context} params.resource Request body data
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$GoogleCloudDialogflowV2beta1Intent>;
+  patch(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$GoogleCloudDialogflowV2beta1Context>;
   patch(
-      params: any,
-      options: MethodOptions|
-      BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Intent>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Context>,
       callback?:
-          BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Intent>):
+          BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Context>):
       void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
-      BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Intent>,
+      BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Context>,
       callback?:
-          BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Intent>):
-      void|AxiosPromise<Schema$GoogleCloudDialogflowV2beta1Intent> {
+          BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Context>):
+      void|AxiosPromise<Schema$GoogleCloudDialogflowV2beta1Context> {
     if (typeof options === 'function') {
       callback = options;
       options = {};
@@ -3779,39 +3818,20 @@ export class Resource$Projects$Agent$Intents {
       context: this.getRoot()
     };
     if (callback) {
-      createAPIRequest<Schema$GoogleCloudDialogflowV2beta1Intent>(
+      createAPIRequest<Schema$GoogleCloudDialogflowV2beta1Context>(
           parameters, callback);
     } else {
-      return createAPIRequest<Schema$GoogleCloudDialogflowV2beta1Intent>(
+      return createAPIRequest<Schema$GoogleCloudDialogflowV2beta1Context>(
           parameters);
     }
   }
 }
 
-export class Resource$Projects$Agent$Runtimes {
-  root: Dialogflow;
-  sessions: Resource$Projects$Agent$Runtimes$Sessions;
-  constructor(root: Dialogflow) {
-    this.root = root;
-    this.getRoot.bind(this);
-    this.sessions = new Resource$Projects$Agent$Runtimes$Sessions(root);
-  }
-
-  getRoot() {
-    return this.root;
-  }
-}
-export class Resource$Projects$Agent$Runtimes$Sessions {
+export class Resource$Projects$Agent$Environments$Users$Sessions$Entitytypes {
   root: Dialogflow;
-  contexts: Resource$Projects$Agent$Runtimes$Sessions$Contexts;
-  entityTypes: Resource$Projects$Agent$Runtimes$Sessions$Entitytypes;
   constructor(root: Dialogflow) {
     this.root = root;
     this.getRoot.bind(this);
-    this.contexts =
-        new Resource$Projects$Agent$Runtimes$Sessions$Contexts(root);
-    this.entityTypes =
-        new Resource$Projects$Agent$Runtimes$Sessions$Entitytypes(root);
   }
 
   getRoot() {
@@ -3820,28 +3840,34 @@ export class Resource$Projects$Agent$Runtimes$Sessions {
 
 
   /**
-   * dialogflow.projects.agent.runtimes.sessions.deleteContexts
-   * @desc Deletes all active contexts in the specified session.
-   * @alias dialogflow.projects.agent.runtimes.sessions.deleteContexts
+   * dialogflow.projects.agent.environments.users.sessions.entityTypes.create
+   * @desc Creates a session entity type.
+   * @alias
+   * dialogflow.projects.agent.environments.users.sessions.entityTypes.create
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {string} params.parent Required. The name of the session to delete all contexts from. Format: `projects/<Project ID>/agent/sessions/<Session ID>` or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified we assume default 'sandbox' runtime.
+   * @param {string} params.parent Required. The session to create a session entity type for. Format: `projects/<Project ID>/agent/sessions/<Session ID>` or `projects/<Project ID>/agent/environments/<Environment ID>/users/<User ID>/ sessions/<Session ID>`. Note: Environments and users are under construction and will be available soon. If <Environment ID> is not specified, we assume default 'draft' environment. If <User ID> is not specified, we assume default '-' user.
+   * @param {().GoogleCloudDialogflowV2beta1SessionEntityType} params.resource Request body data
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  deleteContexts(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$GoogleProtobufEmpty>;
-  deleteContexts(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
-      callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>): void;
-  deleteContexts(
-      params: any,
-      options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
-      callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>):
-      void|AxiosPromise<Schema$GoogleProtobufEmpty> {
+  create(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$GoogleCloudDialogflowV2beta1SessionEntityType>;
+  create(
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
+          Schema$GoogleCloudDialogflowV2beta1SessionEntityType>,
+      callback?: BodyResponseCallback<
+          Schema$GoogleCloudDialogflowV2beta1SessionEntityType>): void;
+  create(
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
+          Schema$GoogleCloudDialogflowV2beta1SessionEntityType>,
+      callback?: BodyResponseCallback<
+          Schema$GoogleCloudDialogflowV2beta1SessionEntityType>):
+      void|AxiosPromise<Schema$GoogleCloudDialogflowV2beta1SessionEntityType> {
     if (typeof options === 'function') {
       callback = options;
       options = {};
@@ -3855,9 +3881,9 @@ export class Resource$Projects$Agent$Runtimes$Sessions {
     const parameters = {
       options: Object.assign(
           {
-            url: (rootUrl + '/v2beta1/{parent}/contexts')
+            url: (rootUrl + '/v2beta1/{parent}/entityTypes')
                      .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'DELETE'
+            method: 'POST'
           },
           options),
       params,
@@ -3866,44 +3892,39 @@ export class Resource$Projects$Agent$Runtimes$Sessions {
       context: this.getRoot()
     };
     if (callback) {
-      createAPIRequest<Schema$GoogleProtobufEmpty>(parameters, callback);
+      createAPIRequest<Schema$GoogleCloudDialogflowV2beta1SessionEntityType>(
+          parameters, callback);
     } else {
-      return createAPIRequest<Schema$GoogleProtobufEmpty>(parameters);
+      return createAPIRequest<
+          Schema$GoogleCloudDialogflowV2beta1SessionEntityType>(parameters);
     }
   }
 
 
   /**
-   * dialogflow.projects.agent.runtimes.sessions.detectIntent
-   * @desc Processes a natural language query and returns structured, actionable
-   * data as a result. This method is not idempotent, because it may cause
-   * contexts and session entity types to be updated, which in turn might affect
-   * results of future queries.
-   * @alias dialogflow.projects.agent.runtimes.sessions.detectIntent
+   * dialogflow.projects.agent.environments.users.sessions.entityTypes.delete
+   * @desc Deletes the specified session entity type.
+   * @alias
+   * dialogflow.projects.agent.environments.users.sessions.entityTypes.delete
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {string} params.session Required. The name of the session this query is sent to. Format: `projects/<Project ID>/agent/sessions/<Session ID>`, or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime. It's up to the API caller to choose an appropriate session ID. It can be a random number or some type of user identifier (preferably hashed). The length of the session ID must not exceed 36 bytes.
-   * @param {().GoogleCloudDialogflowV2beta1DetectIntentRequest} params.resource Request body data
+   * @param {string} params.name Required. The name of the entity type to delete. Format: `projects/<Project ID>/agent/sessions/<Session ID>/entityTypes/<Entity Type Display Name>` or `projects/<Project ID>/agent/environments/<Environment ID>/users/<User ID>/sessions/<Session ID>/entityTypes/<Entity Type Display Name>`. Note: Environments and users are under construction and will be available soon. If <Environment ID> is not specified, we assume default 'draft' environment. If <User ID> is not specified, we assume default '-' user.
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  detectIntent(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$GoogleCloudDialogflowV2beta1DetectIntentResponse>;
-  detectIntent(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2beta1DetectIntentResponse>,
-      callback?: BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2beta1DetectIntentResponse>): void;
-  detectIntent(
-      params: any,
-      options?: MethodOptions|BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2beta1DetectIntentResponse>,
-      callback?: BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2beta1DetectIntentResponse>): void|
-      AxiosPromise<Schema$GoogleCloudDialogflowV2beta1DetectIntentResponse> {
+  delete(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$GoogleProtobufEmpty>;
+  delete(
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
+      callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>): void;
+  delete(
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
+      callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>):
+      void|AxiosPromise<Schema$GoogleProtobufEmpty> {
     if (typeof options === 'function') {
       callback = options;
       options = {};
@@ -3917,66 +3938,49 @@ export class Resource$Projects$Agent$Runtimes$Sessions {
     const parameters = {
       options: Object.assign(
           {
-            url: (rootUrl + '/v2beta1/{session}:detectIntent')
-                     .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'POST'
+            url: (rootUrl + '/v2beta1/{name}').replace(/([^:]\/)\/+/g, '$1'),
+            method: 'DELETE'
           },
           options),
       params,
-      requiredParams: ['session'],
-      pathParams: ['session'],
+      requiredParams: ['name'],
+      pathParams: ['name'],
       context: this.getRoot()
     };
     if (callback) {
-      createAPIRequest<Schema$GoogleCloudDialogflowV2beta1DetectIntentResponse>(
-          parameters, callback);
+      createAPIRequest<Schema$GoogleProtobufEmpty>(parameters, callback);
     } else {
-      return createAPIRequest<
-          Schema$GoogleCloudDialogflowV2beta1DetectIntentResponse>(parameters);
+      return createAPIRequest<Schema$GoogleProtobufEmpty>(parameters);
     }
   }
-}
-export class Resource$Projects$Agent$Runtimes$Sessions$Contexts {
-  root: Dialogflow;
-  constructor(root: Dialogflow) {
-    this.root = root;
-    this.getRoot.bind(this);
-  }
-
-  getRoot() {
-    return this.root;
-  }
 
 
   /**
-   * dialogflow.projects.agent.runtimes.sessions.contexts.create
-   * @desc Creates a context.
-   * @alias dialogflow.projects.agent.runtimes.sessions.contexts.create
+   * dialogflow.projects.agent.environments.users.sessions.entityTypes.get
+   * @desc Retrieves the specified session entity type.
+   * @alias
+   * dialogflow.projects.agent.environments.users.sessions.entityTypes.get
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {string} params.parent Required. The session to create a context for. Format: `projects/<Project ID>/agent/sessions/<Session ID>` or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
-   * @param {().GoogleCloudDialogflowV2beta1Context} params.resource Request body data
+   * @param {string} params.name Required. The name of the session entity type. Format: `projects/<Project ID>/agent/sessions/<Session ID>/entityTypes/<Entity Type Display Name>` or `projects/<Project ID>/agent/environments/<Environment ID>/users/<User ID>/sessions/<Session ID>/ entityTypes/<Entity Type Display Name>`. Note: Environments and users re under construction and will be available soon. If <Environment ID> is not specified, we assume default 'draft' environment. If <User ID> is not specified, we assume default '-' user.
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$GoogleCloudDialogflowV2beta1Context>;
-  create(
-      params: any,
-      options: MethodOptions|
-      BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Context>,
-      callback?:
-          BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Context>):
-      void;
-  create(
-      params: any,
-      options?: MethodOptions|
-      BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Context>,
-      callback?:
-          BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Context>):
-      void|AxiosPromise<Schema$GoogleCloudDialogflowV2beta1Context> {
+  get(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$GoogleCloudDialogflowV2beta1SessionEntityType>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<
+          Schema$GoogleCloudDialogflowV2beta1SessionEntityType>,
+      callback?: BodyResponseCallback<
+          Schema$GoogleCloudDialogflowV2beta1SessionEntityType>): void;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<
+          Schema$GoogleCloudDialogflowV2beta1SessionEntityType>,
+      callback?: BodyResponseCallback<
+          Schema$GoogleCloudDialogflowV2beta1SessionEntityType>):
+      void|AxiosPromise<Schema$GoogleCloudDialogflowV2beta1SessionEntityType> {
     if (typeof options === 'function') {
       callback = options;
       options = {};
@@ -3990,49 +3994,58 @@ export class Resource$Projects$Agent$Runtimes$Sessions$Contexts {
     const parameters = {
       options: Object.assign(
           {
-            url: (rootUrl + '/v2beta1/{parent}/contexts')
-                     .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'POST'
+            url: (rootUrl + '/v2beta1/{name}').replace(/([^:]\/)\/+/g, '$1'),
+            method: 'GET'
           },
           options),
       params,
-      requiredParams: ['parent'],
-      pathParams: ['parent'],
+      requiredParams: ['name'],
+      pathParams: ['name'],
       context: this.getRoot()
     };
     if (callback) {
-      createAPIRequest<Schema$GoogleCloudDialogflowV2beta1Context>(
+      createAPIRequest<Schema$GoogleCloudDialogflowV2beta1SessionEntityType>(
           parameters, callback);
     } else {
-      return createAPIRequest<Schema$GoogleCloudDialogflowV2beta1Context>(
-          parameters);
+      return createAPIRequest<
+          Schema$GoogleCloudDialogflowV2beta1SessionEntityType>(parameters);
     }
   }
 
 
   /**
-   * dialogflow.projects.agent.runtimes.sessions.contexts.delete
-   * @desc Deletes the specified context.
-   * @alias dialogflow.projects.agent.runtimes.sessions.contexts.delete
+   * dialogflow.projects.agent.environments.users.sessions.entityTypes.list
+   * @desc Returns the list of all session entity types in the specified
+   * session.
+   * @alias
+   * dialogflow.projects.agent.environments.users.sessions.entityTypes.list
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {string} params.name Required. The name of the context to delete. Format: `projects/<Project ID>/agent/sessions/<Session ID>/contexts/<Context ID>` or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>/contexts/<Context ID>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
+   * @param {integer=} params.pageSize Optional. The maximum number of items to return in a single page. By default 100 and at most 1000.
+   * @param {string=} params.pageToken Optional. The next_page_token value returned from a previous list request.
+   * @param {string} params.parent Required. The session to list all session entity types from. Format: `projects/<Project ID>/agent/sessions/<Session ID>` or `projects/<Project ID>/agent/environments/<Environment ID>/users/<User ID>/ sessions/<Session ID>`. Note: Environments and users are under construction and will be available soon. If <Environment ID> is not specified, we assume default 'draft' environment. If <User ID> is not specified, we assume default '-' user.
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$GoogleProtobufEmpty>;
-  delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
-      callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>): void;
-  delete(
-      params: any,
-      options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
-      callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>):
-      void|AxiosPromise<Schema$GoogleProtobufEmpty> {
+  list(params?: any, options?: MethodOptions): AxiosPromise<
+      Schema$GoogleCloudDialogflowV2beta1ListSessionEntityTypesResponse>;
+  list(
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
+          Schema$GoogleCloudDialogflowV2beta1ListSessionEntityTypesResponse>,
+      callback?: BodyResponseCallback<
+          Schema$GoogleCloudDialogflowV2beta1ListSessionEntityTypesResponse>):
+      void;
+  list(
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
+          Schema$GoogleCloudDialogflowV2beta1ListSessionEntityTypesResponse>,
+      callback?: BodyResponseCallback<
+          Schema$GoogleCloudDialogflowV2beta1ListSessionEntityTypesResponse>):
+      void|AxiosPromise<
+          Schema$GoogleCloudDialogflowV2beta1ListSessionEntityTypesResponse> {
     if (typeof options === 'function') {
       callback = options;
       options = {};
@@ -4046,49 +4059,58 @@ export class Resource$Projects$Agent$Runtimes$Sessions$Contexts {
     const parameters = {
       options: Object.assign(
           {
-            url: (rootUrl + '/v2beta1/{name}').replace(/([^:]\/)\/+/g, '$1'),
-            method: 'DELETE'
+            url: (rootUrl + '/v2beta1/{parent}/entityTypes')
+                     .replace(/([^:]\/)\/+/g, '$1'),
+            method: 'GET'
           },
           options),
       params,
-      requiredParams: ['name'],
-      pathParams: ['name'],
+      requiredParams: ['parent'],
+      pathParams: ['parent'],
       context: this.getRoot()
     };
     if (callback) {
-      createAPIRequest<Schema$GoogleProtobufEmpty>(parameters, callback);
+      createAPIRequest<
+          Schema$GoogleCloudDialogflowV2beta1ListSessionEntityTypesResponse>(
+          parameters, callback);
     } else {
-      return createAPIRequest<Schema$GoogleProtobufEmpty>(parameters);
+      return createAPIRequest<
+          Schema$GoogleCloudDialogflowV2beta1ListSessionEntityTypesResponse>(
+          parameters);
     }
   }
 
 
   /**
-   * dialogflow.projects.agent.runtimes.sessions.contexts.get
-   * @desc Retrieves the specified context.
-   * @alias dialogflow.projects.agent.runtimes.sessions.contexts.get
+   * dialogflow.projects.agent.environments.users.sessions.entityTypes.patch
+   * @desc Updates the specified session entity type.
+   * @alias
+   * dialogflow.projects.agent.environments.users.sessions.entityTypes.patch
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {string} params.name Required. The name of the context. Format: `projects/<Project ID>/agent/sessions/<Session ID>/contexts/<Context ID>` or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>/contexts/<Context ID>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
+   * @param {string} params.name Required. The unique identifier of this session entity type. Format: `projects/<Project ID>/agent/sessions/<Session ID>/entityTypes/<Entity Type Display Name>`, or `projects/<Project ID>/agent/environments/<Environment ID>/users/<User ID>/sessions /<Session ID>/entityTypes/<Entity Type Display Name>`. Note: Environments and users are under construction and will be available soon. If <Environment ID> is not specified, we assume default 'draft' environment. If <User ID> is not specified, we assume default '-' user.
+   * @param {string=} params.updateMask Optional. The mask to control which fields get updated.
+   * @param {().GoogleCloudDialogflowV2beta1SessionEntityType} params.resource Request body data
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$GoogleCloudDialogflowV2beta1Context>;
-  get(params: any,
-      options: MethodOptions|
-      BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Context>,
-      callback?:
-          BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Context>):
-      void;
-  get(params: any,
-      options?: MethodOptions|
-      BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Context>,
-      callback?:
-          BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Context>):
-      void|AxiosPromise<Schema$GoogleCloudDialogflowV2beta1Context> {
+  patch(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$GoogleCloudDialogflowV2beta1SessionEntityType>;
+  patch(
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
+          Schema$GoogleCloudDialogflowV2beta1SessionEntityType>,
+      callback?: BodyResponseCallback<
+          Schema$GoogleCloudDialogflowV2beta1SessionEntityType>): void;
+  patch(
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
+          Schema$GoogleCloudDialogflowV2beta1SessionEntityType>,
+      callback?: BodyResponseCallback<
+          Schema$GoogleCloudDialogflowV2beta1SessionEntityType>):
+      void|AxiosPromise<Schema$GoogleCloudDialogflowV2beta1SessionEntityType> {
     if (typeof options === 'function') {
       callback = options;
       options = {};
@@ -4103,7 +4125,7 @@ export class Resource$Projects$Agent$Runtimes$Sessions$Contexts {
       options: Object.assign(
           {
             url: (rootUrl + '/v2beta1/{name}').replace(/([^:]\/)\/+/g, '$1'),
-            method: 'GET'
+            method: 'PATCH'
           },
           options),
       params,
@@ -4112,44 +4134,56 @@ export class Resource$Projects$Agent$Runtimes$Sessions$Contexts {
       context: this.getRoot()
     };
     if (callback) {
-      createAPIRequest<Schema$GoogleCloudDialogflowV2beta1Context>(
+      createAPIRequest<Schema$GoogleCloudDialogflowV2beta1SessionEntityType>(
           parameters, callback);
     } else {
-      return createAPIRequest<Schema$GoogleCloudDialogflowV2beta1Context>(
-          parameters);
+      return createAPIRequest<
+          Schema$GoogleCloudDialogflowV2beta1SessionEntityType>(parameters);
     }
   }
+}
+
+
+
+export class Resource$Projects$Agent$Intents {
+  root: Dialogflow;
+  constructor(root: Dialogflow) {
+    this.root = root;
+    this.getRoot.bind(this);
+  }
+
+  getRoot() {
+    return this.root;
+  }
 
 
   /**
-   * dialogflow.projects.agent.runtimes.sessions.contexts.list
-   * @desc Returns the list of all contexts in the specified session.
-   * @alias dialogflow.projects.agent.runtimes.sessions.contexts.list
+   * dialogflow.projects.agent.intents.batchDelete
+   * @desc Deletes intents in the specified agent.  Operation <response:
+   * google.protobuf.Empty>
+   * @alias dialogflow.projects.agent.intents.batchDelete
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {integer=} params.pageSize Optional. The maximum number of items to return in a single page. By default 100 and at most 1000.
-   * @param {string=} params.pageToken Optional. The next_page_token value returned from a previous list request.
-   * @param {string} params.parent Required. The session to list all contexts from. Format: `projects/<Project ID>/agent/sessions/<Session ID>` or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
+   * @param {string} params.parent Required. The name of the agent to delete all entities types for. Format: `projects/<Project ID>/agent`.
+   * @param {().GoogleCloudDialogflowV2beta1BatchDeleteIntentsRequest} params.resource Request body data
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$GoogleCloudDialogflowV2beta1ListContextsResponse>;
-  list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2beta1ListContextsResponse>,
-      callback?: BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2beta1ListContextsResponse>): void;
-  list(
-      params: any,
-      options?: MethodOptions|BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2beta1ListContextsResponse>,
-      callback?: BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2beta1ListContextsResponse>): void|
-      AxiosPromise<Schema$GoogleCloudDialogflowV2beta1ListContextsResponse> {
+  batchDelete(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$GoogleLongrunningOperation>;
+  batchDelete(
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$GoogleLongrunningOperation>,
+      callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
+  batchDelete(
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$GoogleLongrunningOperation>,
+      callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>):
+      void|AxiosPromise<Schema$GoogleLongrunningOperation> {
     if (typeof options === 'function') {
       callback = options;
       options = {};
@@ -4163,9 +4197,9 @@ export class Resource$Projects$Agent$Runtimes$Sessions$Contexts {
     const parameters = {
       options: Object.assign(
           {
-            url: (rootUrl + '/v2beta1/{parent}/contexts')
+            url: (rootUrl + '/v2beta1/{parent}/intents:batchDelete')
                      .replace(/([^:]\/)\/+/g, '$1'),
-            method: 'GET'
+            method: 'POST'
           },
           options),
       params,
@@ -4174,45 +4208,40 @@ export class Resource$Projects$Agent$Runtimes$Sessions$Contexts {
       context: this.getRoot()
     };
     if (callback) {
-      createAPIRequest<Schema$GoogleCloudDialogflowV2beta1ListContextsResponse>(
-          parameters, callback);
+      createAPIRequest<Schema$GoogleLongrunningOperation>(parameters, callback);
     } else {
-      return createAPIRequest<
-          Schema$GoogleCloudDialogflowV2beta1ListContextsResponse>(parameters);
+      return createAPIRequest<Schema$GoogleLongrunningOperation>(parameters);
     }
   }
 
 
   /**
-   * dialogflow.projects.agent.runtimes.sessions.contexts.patch
-   * @desc Updates the specified context.
-   * @alias dialogflow.projects.agent.runtimes.sessions.contexts.patch
+   * dialogflow.projects.agent.intents.batchUpdate
+   * @desc Updates/Creates multiple intents in the specified agent.  Operation
+   * <response: BatchUpdateIntentsResponse>
+   * @alias dialogflow.projects.agent.intents.batchUpdate
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {string} params.name Required. The unique identifier of the context. Format: `projects/<Project ID>/agent/sessions/<Session ID>/contexts/<Context ID>`, or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>/contexts/<Context ID>`. Note: Runtimes are under construction and will be available soon. The Context ID is always converted to lowercase. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
-   * @param {string=} params.updateMask Optional. The mask to control which fields get updated.
-   * @param {().GoogleCloudDialogflowV2beta1Context} params.resource Request body data
+   * @param {string} params.parent Required. The name of the agent to update or create intents in. Format: `projects/<Project ID>/agent`.
+   * @param {().GoogleCloudDialogflowV2beta1BatchUpdateIntentsRequest} params.resource Request body data
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$GoogleCloudDialogflowV2beta1Context>;
-  patch(
-      params: any,
-      options: MethodOptions|
-      BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Context>,
-      callback?:
-          BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Context>):
-      void;
-  patch(
-      params: any,
+  batchUpdate(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$GoogleLongrunningOperation>;
+  batchUpdate(
+      params?: any,
       options?: MethodOptions|
-      BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Context>,
-      callback?:
-          BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Context>):
-      void|AxiosPromise<Schema$GoogleCloudDialogflowV2beta1Context> {
+      BodyResponseCallback<Schema$GoogleLongrunningOperation>,
+      callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
+  batchUpdate(
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$GoogleLongrunningOperation>,
+      callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>):
+      void|AxiosPromise<Schema$GoogleLongrunningOperation> {
     if (typeof options === 'function') {
       callback = options;
       options = {};
@@ -4226,65 +4255,55 @@ export class Resource$Projects$Agent$Runtimes$Sessions$Contexts {
     const parameters = {
       options: Object.assign(
           {
-            url: (rootUrl + '/v2beta1/{name}').replace(/([^:]\/)\/+/g, '$1'),
-            method: 'PATCH'
+            url: (rootUrl + '/v2beta1/{parent}/intents:batchUpdate')
+                     .replace(/([^:]\/)\/+/g, '$1'),
+            method: 'POST'
           },
           options),
       params,
-      requiredParams: ['name'],
-      pathParams: ['name'],
+      requiredParams: ['parent'],
+      pathParams: ['parent'],
       context: this.getRoot()
     };
     if (callback) {
-      createAPIRequest<Schema$GoogleCloudDialogflowV2beta1Context>(
-          parameters, callback);
+      createAPIRequest<Schema$GoogleLongrunningOperation>(parameters, callback);
     } else {
-      return createAPIRequest<Schema$GoogleCloudDialogflowV2beta1Context>(
-          parameters);
+      return createAPIRequest<Schema$GoogleLongrunningOperation>(parameters);
     }
   }
-}
-
-export class Resource$Projects$Agent$Runtimes$Sessions$Entitytypes {
-  root: Dialogflow;
-  constructor(root: Dialogflow) {
-    this.root = root;
-    this.getRoot.bind(this);
-  }
-
-  getRoot() {
-    return this.root;
-  }
 
 
   /**
-   * dialogflow.projects.agent.runtimes.sessions.entityTypes.create
-   * @desc Creates a session entity type.
-   * @alias dialogflow.projects.agent.runtimes.sessions.entityTypes.create
+   * dialogflow.projects.agent.intents.create
+   * @desc Creates an intent in the specified agent.
+   * @alias dialogflow.projects.agent.intents.create
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {string} params.parent Required. The session to create a session entity type for. Format: `projects/<Project ID>/agent/sessions/<Session ID>` or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
-   * @param {().GoogleCloudDialogflowV2beta1SessionEntityType} params.resource Request body data
+   * @param {string=} params.intentView Optional. The resource view to apply to the returned intent.
+   * @param {string=} params.languageCode Optional. The language of training phrases, parameters and rich messages defined in `intent`. If not specified, the agent's default language is used. [More than a dozen languages](https://dialogflow.com/docs/reference/language) are supported. Note: languages must be enabled in the agent, before they can be used.
+   * @param {string} params.parent Required. The agent to create a intent for. Format: `projects/<Project ID>/agent`.
+   * @param {().GoogleCloudDialogflowV2beta1Intent} params.resource Request body data
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$GoogleCloudDialogflowV2beta1SessionEntityType>;
+  create(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$GoogleCloudDialogflowV2beta1Intent>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2beta1SessionEntityType>,
-      callback?: BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2beta1SessionEntityType>): void;
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Intent>,
+      callback?:
+          BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Intent>):
+      void;
   create(
-      params: any,
-      options?: MethodOptions|BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2beta1SessionEntityType>,
-      callback?: BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2beta1SessionEntityType>):
-      void|AxiosPromise<Schema$GoogleCloudDialogflowV2beta1SessionEntityType> {
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Intent>,
+      callback?:
+          BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Intent>):
+      void|AxiosPromise<Schema$GoogleCloudDialogflowV2beta1Intent> {
     if (typeof options === 'function') {
       callback = options;
       options = {};
@@ -4298,7 +4317,7 @@ export class Resource$Projects$Agent$Runtimes$Sessions$Entitytypes {
     const parameters = {
       options: Object.assign(
           {
-            url: (rootUrl + '/v2beta1/{parent}/entityTypes')
+            url: (rootUrl + '/v2beta1/{parent}/intents')
                      .replace(/([^:]\/)\/+/g, '$1'),
             method: 'POST'
           },
@@ -4309,35 +4328,35 @@ export class Resource$Projects$Agent$Runtimes$Sessions$Entitytypes {
       context: this.getRoot()
     };
     if (callback) {
-      createAPIRequest<Schema$GoogleCloudDialogflowV2beta1SessionEntityType>(
+      createAPIRequest<Schema$GoogleCloudDialogflowV2beta1Intent>(
           parameters, callback);
     } else {
-      return createAPIRequest<
-          Schema$GoogleCloudDialogflowV2beta1SessionEntityType>(parameters);
+      return createAPIRequest<Schema$GoogleCloudDialogflowV2beta1Intent>(
+          parameters);
     }
   }
 
 
   /**
-   * dialogflow.projects.agent.runtimes.sessions.entityTypes.delete
-   * @desc Deletes the specified session entity type.
-   * @alias dialogflow.projects.agent.runtimes.sessions.entityTypes.delete
+   * dialogflow.projects.agent.intents.delete
+   * @desc Deletes the specified intent.
+   * @alias dialogflow.projects.agent.intents.delete
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {string} params.name Required. The name of the entity type to delete. Format: `projects/<Project ID>/agent/sessions/<Session ID>/entityTypes/<Entity Type Display Name>` or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>/entityTypes/<Entity Type Display Name>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
+   * @param {string} params.name Required. The name of the intent to delete. Format: `projects/<Project ID>/agent/intents/<Intent ID>`.
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions):
+  delete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleProtobufEmpty>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>):
       void|AxiosPromise<Schema$GoogleProtobufEmpty> {
@@ -4372,30 +4391,33 @@ export class Resource$Projects$Agent$Runtimes$Sessions$Entitytypes {
 
 
   /**
-   * dialogflow.projects.agent.runtimes.sessions.entityTypes.get
-   * @desc Retrieves the specified session entity type.
-   * @alias dialogflow.projects.agent.runtimes.sessions.entityTypes.get
+   * dialogflow.projects.agent.intents.get
+   * @desc Retrieves the specified intent.
+   * @alias dialogflow.projects.agent.intents.get
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {string} params.name Required. The name of the session entity type. Format: `projects/<Project ID>/agent/sessions/<Session ID>/entityTypes/<Entity Type Display Name>` or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>/entityTypes/<Entity Type Display Name>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
+   * @param {string=} params.intentView Optional. The resource view to apply to the returned intent.
+   * @param {string=} params.languageCode Optional. The language to retrieve training phrases, parameters and rich messages for. If not specified, the agent's default language is used. [More than a dozen languages](https://dialogflow.com/docs/reference/language) are supported. Note: languages must be enabled in the agent, before they can be used.
+   * @param {string} params.name Required. The name of the intent. Format: `projects/<Project ID>/agent/intents/<Intent ID>`.
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$GoogleCloudDialogflowV2beta1SessionEntityType>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2beta1SessionEntityType>,
-      callback?: BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2beta1SessionEntityType>): void;
-  get(params: any,
-      options?: MethodOptions|BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2beta1SessionEntityType>,
-      callback?: BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2beta1SessionEntityType>):
-      void|AxiosPromise<Schema$GoogleCloudDialogflowV2beta1SessionEntityType> {
+  get(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$GoogleCloudDialogflowV2beta1Intent>;
+  get(params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Intent>,
+      callback?:
+          BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Intent>):
+      void;
+  get(params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Intent>,
+      callback?:
+          BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Intent>):
+      void|AxiosPromise<Schema$GoogleCloudDialogflowV2beta1Intent> {
     if (typeof options === 'function') {
       callback = options;
       options = {};
@@ -4419,47 +4441,46 @@ export class Resource$Projects$Agent$Runtimes$Sessions$Entitytypes {
       context: this.getRoot()
     };
     if (callback) {
-      createAPIRequest<Schema$GoogleCloudDialogflowV2beta1SessionEntityType>(
+      createAPIRequest<Schema$GoogleCloudDialogflowV2beta1Intent>(
           parameters, callback);
     } else {
-      return createAPIRequest<
-          Schema$GoogleCloudDialogflowV2beta1SessionEntityType>(parameters);
+      return createAPIRequest<Schema$GoogleCloudDialogflowV2beta1Intent>(
+          parameters);
     }
   }
 
 
   /**
-   * dialogflow.projects.agent.runtimes.sessions.entityTypes.list
-   * @desc Returns the list of all session entity types in the specified
-   * session.
-   * @alias dialogflow.projects.agent.runtimes.sessions.entityTypes.list
+   * dialogflow.projects.agent.intents.list
+   * @desc Returns the list of all intents in the specified agent.
+   * @alias dialogflow.projects.agent.intents.list
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
+   * @param {string=} params.intentView Optional. The resource view to apply to the returned intent.
+   * @param {string=} params.languageCode Optional. The language to list training phrases, parameters and rich messages for. If not specified, the agent's default language is used. [More than a dozen languages](https://dialogflow.com/docs/reference/language) are supported. Note: languages must be enabled in the agent before they can be used.
    * @param {integer=} params.pageSize Optional. The maximum number of items to return in a single page. By default 100 and at most 1000.
    * @param {string=} params.pageToken Optional. The next_page_token value returned from a previous list request.
-   * @param {string} params.parent Required. The session to list all session entity types from. Format: `projects/<Project ID>/agent/sessions/<Session ID>` or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
+   * @param {string} params.parent Required. The agent to list all intents from. Format: `projects/<Project ID>/agent`.
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<
-      Schema$GoogleCloudDialogflowV2beta1ListSessionEntityTypesResponse>;
+  list(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$GoogleCloudDialogflowV2beta1ListIntentsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2beta1ListSessionEntityTypesResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
+          Schema$GoogleCloudDialogflowV2beta1ListIntentsResponse>,
       callback?: BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2beta1ListSessionEntityTypesResponse>):
-      void;
+          Schema$GoogleCloudDialogflowV2beta1ListIntentsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2beta1ListSessionEntityTypesResponse>,
+          Schema$GoogleCloudDialogflowV2beta1ListIntentsResponse>,
       callback?: BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2beta1ListSessionEntityTypesResponse>):
-      void|AxiosPromise<
-          Schema$GoogleCloudDialogflowV2beta1ListSessionEntityTypesResponse> {
+          Schema$GoogleCloudDialogflowV2beta1ListIntentsResponse>): void|
+      AxiosPromise<Schema$GoogleCloudDialogflowV2beta1ListIntentsResponse> {
     if (typeof options === 'function') {
       callback = options;
       options = {};
@@ -4473,7 +4494,7 @@ export class Resource$Projects$Agent$Runtimes$Sessions$Entitytypes {
     const parameters = {
       options: Object.assign(
           {
-            url: (rootUrl + '/v2beta1/{parent}/entityTypes')
+            url: (rootUrl + '/v2beta1/{parent}/intents')
                      .replace(/([^:]\/)\/+/g, '$1'),
             method: 'GET'
           },
@@ -4484,46 +4505,47 @@ export class Resource$Projects$Agent$Runtimes$Sessions$Entitytypes {
       context: this.getRoot()
     };
     if (callback) {
-      createAPIRequest<
-          Schema$GoogleCloudDialogflowV2beta1ListSessionEntityTypesResponse>(
+      createAPIRequest<Schema$GoogleCloudDialogflowV2beta1ListIntentsResponse>(
           parameters, callback);
     } else {
       return createAPIRequest<
-          Schema$GoogleCloudDialogflowV2beta1ListSessionEntityTypesResponse>(
-          parameters);
+          Schema$GoogleCloudDialogflowV2beta1ListIntentsResponse>(parameters);
     }
   }
 
 
   /**
-   * dialogflow.projects.agent.runtimes.sessions.entityTypes.patch
-   * @desc Updates the specified session entity type.
-   * @alias dialogflow.projects.agent.runtimes.sessions.entityTypes.patch
+   * dialogflow.projects.agent.intents.patch
+   * @desc Updates the specified intent.
+   * @alias dialogflow.projects.agent.intents.patch
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {string} params.name Required. The unique identifier of this session entity type. Format: `projects/<Project ID>/agent/sessions/<Session ID>/entityTypes/<Entity Type Display Name>`, or `projects/<Project ID>/agent/runtimes/<Runtime ID>sessions/<Session ID>/entityTypes/<Entity Type Display Name>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
+   * @param {string=} params.intentView Optional. The resource view to apply to the returned intent.
+   * @param {string=} params.languageCode Optional. The language of training phrases, parameters and rich messages defined in `intent`. If not specified, the agent's default language is used. [More than a dozen languages](https://dialogflow.com/docs/reference/language) are supported. Note: languages must be enabled in the agent, before they can be used.
+   * @param {string} params.name Required for all methods except `create` (`create` populates the name automatically. The unique identifier of this intent. Format: `projects/<Project ID>/agent/intents/<Intent ID>`.
    * @param {string=} params.updateMask Optional. The mask to control which fields get updated.
-   * @param {().GoogleCloudDialogflowV2beta1SessionEntityType} params.resource Request body data
+   * @param {().GoogleCloudDialogflowV2beta1Intent} params.resource Request body data
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
-      AxiosPromise<Schema$GoogleCloudDialogflowV2beta1SessionEntityType>;
+  patch(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$GoogleCloudDialogflowV2beta1Intent>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2beta1SessionEntityType>,
-      callback?: BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2beta1SessionEntityType>): void;
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Intent>,
+      callback?:
+          BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Intent>):
+      void;
   patch(
-      params: any,
-      options?: MethodOptions|BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2beta1SessionEntityType>,
-      callback?: BodyResponseCallback<
-          Schema$GoogleCloudDialogflowV2beta1SessionEntityType>):
-      void|AxiosPromise<Schema$GoogleCloudDialogflowV2beta1SessionEntityType> {
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Intent>,
+      callback?:
+          BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Intent>):
+      void|AxiosPromise<Schema$GoogleCloudDialogflowV2beta1Intent> {
     if (typeof options === 'function') {
       callback = options;
       options = {};
@@ -4547,17 +4569,15 @@ export class Resource$Projects$Agent$Runtimes$Sessions$Entitytypes {
       context: this.getRoot()
     };
     if (callback) {
-      createAPIRequest<Schema$GoogleCloudDialogflowV2beta1SessionEntityType>(
+      createAPIRequest<Schema$GoogleCloudDialogflowV2beta1Intent>(
           parameters, callback);
     } else {
-      return createAPIRequest<
-          Schema$GoogleCloudDialogflowV2beta1SessionEntityType>(parameters);
+      return createAPIRequest<Schema$GoogleCloudDialogflowV2beta1Intent>(
+          parameters);
     }
   }
 }
 
-
-
 export class Resource$Projects$Agent$Sessions {
   root: Dialogflow;
   contexts: Resource$Projects$Agent$Sessions$Contexts;
@@ -4581,19 +4601,19 @@ export class Resource$Projects$Agent$Sessions {
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {string} params.parent Required. The name of the session to delete all contexts from. Format: `projects/<Project ID>/agent/sessions/<Session ID>` or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified we assume default 'sandbox' runtime.
+   * @param {string} params.parent Required. The name of the session to delete all contexts from. Format: `projects/<Project ID>/agent/sessions/<Session ID>` or `projects/<Project ID>/agent/environments/<Environment ID>/users/<User ID>/sessions/<Session ID>`. Note: Environments and users are under construction and will be available soon. If <Environment ID> is not specified we assume default 'draft' environment. If <User ID> is not specified, we assume default '-' user.
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  deleteContexts(params: any, options?: MethodOptions):
+  deleteContexts(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleProtobufEmpty>;
   deleteContexts(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>): void;
   deleteContexts(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>):
       void|AxiosPromise<Schema$GoogleProtobufEmpty> {
@@ -4638,22 +4658,22 @@ export class Resource$Projects$Agent$Sessions {
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {string} params.session Required. The name of the session this query is sent to. Format: `projects/<Project ID>/agent/sessions/<Session ID>`, or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime. It's up to the API caller to choose an appropriate session ID. It can be a random number or some type of user identifier (preferably hashed). The length of the session ID must not exceed 36 bytes.
+   * @param {string} params.session Required. The name of the session this query is sent to. Format: `projects/<Project ID>/agent/sessions/<Session ID>`, or `projects/<Project ID>/agent/environments/<Environment ID>/users/<User ID>/sessions/<Session ID>`. Note: Environments and users are under construction and will be available soon. If <Environment ID> is not specified, we assume default 'draft' environment. If <User ID> is not specified, we are using "-". It’s up to the API caller to choose an appropriate <Session ID>. and <User Id>. They can be a random numbers or some type of user and session identifiers (preferably hashed). The length of the <Session ID> and <User ID> must not exceed 36 characters.
    * @param {().GoogleCloudDialogflowV2beta1DetectIntentRequest} params.resource Request body data
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  detectIntent(params: any, options?: MethodOptions):
+  detectIntent(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudDialogflowV2beta1DetectIntentResponse>;
   detectIntent(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$GoogleCloudDialogflowV2beta1DetectIntentResponse>,
       callback?: BodyResponseCallback<
           Schema$GoogleCloudDialogflowV2beta1DetectIntentResponse>): void;
   detectIntent(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$GoogleCloudDialogflowV2beta1DetectIntentResponse>,
       callback?: BodyResponseCallback<
@@ -4710,23 +4730,23 @@ export class Resource$Projects$Agent$Sessions$Contexts {
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {string} params.parent Required. The session to create a context for. Format: `projects/<Project ID>/agent/sessions/<Session ID>` or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
+   * @param {string} params.parent Required. The session to create a context for. Format: `projects/<Project ID>/agent/sessions/<Session ID>` or `projects/<Project ID>/agent/environments/<Environment ID>/users/<User ID>/sessions/<Session ID>`. Note: Environments and users are under construction and will be available soon. If <Environment ID> is not specified, we assume default 'draft' environment. If <User ID> is not specified, we assume default '-' user.
    * @param {().GoogleCloudDialogflowV2beta1Context} params.resource Request body data
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudDialogflowV2beta1Context>;
   create(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Context>,
       callback?:
           BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Context>):
       void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Context>,
       callback?:
@@ -4772,19 +4792,19 @@ export class Resource$Projects$Agent$Sessions$Contexts {
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {string} params.name Required. The name of the context to delete. Format: `projects/<Project ID>/agent/sessions/<Session ID>/contexts/<Context ID>` or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>/contexts/<Context ID>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
+   * @param {string} params.name Required. The name of the context to delete. Format: `projects/<Project ID>/agent/sessions/<Session ID>/contexts/<Context ID>` or `projects/<Project ID>/agent/environments/<Environment ID>/users/<User ID>/sessions/<Session ID>/contexts/<Context ID>`. Note: Environments and users are under construction and will be available soon. If <Environment ID> is not specified, we assume default 'draft' environment. If <User ID> is not specified, we assume default '-' user.
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions):
+  delete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleProtobufEmpty>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>):
       void|AxiosPromise<Schema$GoogleProtobufEmpty> {
@@ -4825,20 +4845,20 @@ export class Resource$Projects$Agent$Sessions$Contexts {
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {string} params.name Required. The name of the context. Format: `projects/<Project ID>/agent/sessions/<Session ID>/contexts/<Context ID>` or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>/contexts/<Context ID>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
+   * @param {string} params.name Required. The name of the context. Format: `projects/<Project ID>/agent/sessions/<Session ID>/contexts/<Context ID>` or `projects/<Project ID>/agent/environments/<Environment ID>/users/<User ID>/sessions/<Session ID>/contexts/<Context ID>`. Note: Environments and users are under construction and will be available soon. If <Environment ID> is not specified, we assume default 'draft' environment. If <User ID> is not specified, we assume default '-' user.
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions):
+  get(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudDialogflowV2beta1Context>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Context>,
       callback?:
           BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Context>):
       void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Context>,
       callback?:
@@ -4885,21 +4905,21 @@ export class Resource$Projects$Agent$Sessions$Contexts {
    * @param {object} params Parameters for request
    * @param {integer=} params.pageSize Optional. The maximum number of items to return in a single page. By default 100 and at most 1000.
    * @param {string=} params.pageToken Optional. The next_page_token value returned from a previous list request.
-   * @param {string} params.parent Required. The session to list all contexts from. Format: `projects/<Project ID>/agent/sessions/<Session ID>` or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
+   * @param {string} params.parent Required. The session to list all contexts from. Format: `projects/<Project ID>/agent/sessions/<Session ID>` or `projects/<Project ID>/agent/environments/<Environment ID>/users/<User ID>/sessions/<Session ID>`. Note: Environments and users are under construction and will be available soon. If <Environment ID> is not specified, we assume default 'draft' environment. If <User ID> is not specified, we assume default '-' user.
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudDialogflowV2beta1ListContextsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$GoogleCloudDialogflowV2beta1ListContextsResponse>,
       callback?: BodyResponseCallback<
           Schema$GoogleCloudDialogflowV2beta1ListContextsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$GoogleCloudDialogflowV2beta1ListContextsResponse>,
       callback?: BodyResponseCallback<
@@ -4945,24 +4965,24 @@ export class Resource$Projects$Agent$Sessions$Contexts {
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {string} params.name Required. The unique identifier of the context. Format: `projects/<Project ID>/agent/sessions/<Session ID>/contexts/<Context ID>`, or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>/contexts/<Context ID>`. Note: Runtimes are under construction and will be available soon. The Context ID is always converted to lowercase. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
+   * @param {string} params.name Required. The unique identifier of the context. Format: `projects/<Project ID>/agent/sessions/<Session ID>/contexts/<Context ID>`, or `projects/<Project ID>/agent/environments/<Environment ID>/users/<User ID>/sessions/<Session ID>/contexts/<Context ID>`. Note: Environments and users are under construction and will be available soon. The Context ID is always converted to lowercase. If <Environment ID> is not specified, we assume default 'draft' environment. If <User ID> is not specified, we assume default '-' user.
    * @param {string=} params.updateMask Optional. The mask to control which fields get updated.
    * @param {().GoogleCloudDialogflowV2beta1Context} params.resource Request body data
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudDialogflowV2beta1Context>;
   patch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Context>,
       callback?:
           BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Context>):
       void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudDialogflowV2beta1Context>,
       callback?:
@@ -5019,22 +5039,22 @@ export class Resource$Projects$Agent$Sessions$Entitytypes {
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {string} params.parent Required. The session to create a session entity type for. Format: `projects/<Project ID>/agent/sessions/<Session ID>` or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
+   * @param {string} params.parent Required. The session to create a session entity type for. Format: `projects/<Project ID>/agent/sessions/<Session ID>` or `projects/<Project ID>/agent/environments/<Environment ID>/users/<User ID>/ sessions/<Session ID>`. Note: Environments and users are under construction and will be available soon. If <Environment ID> is not specified, we assume default 'draft' environment. If <User ID> is not specified, we assume default '-' user.
    * @param {().GoogleCloudDialogflowV2beta1SessionEntityType} params.resource Request body data
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudDialogflowV2beta1SessionEntityType>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$GoogleCloudDialogflowV2beta1SessionEntityType>,
       callback?: BodyResponseCallback<
           Schema$GoogleCloudDialogflowV2beta1SessionEntityType>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$GoogleCloudDialogflowV2beta1SessionEntityType>,
       callback?: BodyResponseCallback<
@@ -5080,19 +5100,19 @@ export class Resource$Projects$Agent$Sessions$Entitytypes {
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {string} params.name Required. The name of the entity type to delete. Format: `projects/<Project ID>/agent/sessions/<Session ID>/entityTypes/<Entity Type Display Name>` or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>/entityTypes/<Entity Type Display Name>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
+   * @param {string} params.name Required. The name of the entity type to delete. Format: `projects/<Project ID>/agent/sessions/<Session ID>/entityTypes/<Entity Type Display Name>` or `projects/<Project ID>/agent/environments/<Environment ID>/users/<User ID>/sessions/<Session ID>/entityTypes/<Entity Type Display Name>`. Note: Environments and users are under construction and will be available soon. If <Environment ID> is not specified, we assume default 'draft' environment. If <User ID> is not specified, we assume default '-' user.
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions):
+  delete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleProtobufEmpty>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>):
       void|AxiosPromise<Schema$GoogleProtobufEmpty> {
@@ -5133,19 +5153,19 @@ export class Resource$Projects$Agent$Sessions$Entitytypes {
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {string} params.name Required. The name of the session entity type. Format: `projects/<Project ID>/agent/sessions/<Session ID>/entityTypes/<Entity Type Display Name>` or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>/entityTypes/<Entity Type Display Name>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
+   * @param {string} params.name Required. The name of the session entity type. Format: `projects/<Project ID>/agent/sessions/<Session ID>/entityTypes/<Entity Type Display Name>` or `projects/<Project ID>/agent/environments/<Environment ID>/users/<User ID>/sessions/<Session ID>/ entityTypes/<Entity Type Display Name>`. Note: Environments and users re under construction and will be available soon. If <Environment ID> is not specified, we assume default 'draft' environment. If <User ID> is not specified, we assume default '-' user.
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions):
+  get(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudDialogflowV2beta1SessionEntityType>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$GoogleCloudDialogflowV2beta1SessionEntityType>,
       callback?: BodyResponseCallback<
           Schema$GoogleCloudDialogflowV2beta1SessionEntityType>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$GoogleCloudDialogflowV2beta1SessionEntityType>,
       callback?: BodyResponseCallback<
@@ -5193,22 +5213,22 @@ export class Resource$Projects$Agent$Sessions$Entitytypes {
    * @param {object} params Parameters for request
    * @param {integer=} params.pageSize Optional. The maximum number of items to return in a single page. By default 100 and at most 1000.
    * @param {string=} params.pageToken Optional. The next_page_token value returned from a previous list request.
-   * @param {string} params.parent Required. The session to list all session entity types from. Format: `projects/<Project ID>/agent/sessions/<Session ID>` or `projects/<Project ID>/agent/runtimes/<Runtime ID>/sessions/<Session ID>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
+   * @param {string} params.parent Required. The session to list all session entity types from. Format: `projects/<Project ID>/agent/sessions/<Session ID>` or `projects/<Project ID>/agent/environments/<Environment ID>/users/<User ID>/ sessions/<Session ID>`. Note: Environments and users are under construction and will be available soon. If <Environment ID> is not specified, we assume default 'draft' environment. If <User ID> is not specified, we assume default '-' user.
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<
+  list(params?: any, options?: MethodOptions): AxiosPromise<
       Schema$GoogleCloudDialogflowV2beta1ListSessionEntityTypesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$GoogleCloudDialogflowV2beta1ListSessionEntityTypesResponse>,
       callback?: BodyResponseCallback<
           Schema$GoogleCloudDialogflowV2beta1ListSessionEntityTypesResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$GoogleCloudDialogflowV2beta1ListSessionEntityTypesResponse>,
       callback?: BodyResponseCallback<
@@ -5257,23 +5277,23 @@ export class Resource$Projects$Agent$Sessions$Entitytypes {
    * @memberOf! ()
    *
    * @param {object} params Parameters for request
-   * @param {string} params.name Required. The unique identifier of this session entity type. Format: `projects/<Project ID>/agent/sessions/<Session ID>/entityTypes/<Entity Type Display Name>`, or `projects/<Project ID>/agent/runtimes/<Runtime ID>sessions/<Session ID>/entityTypes/<Entity Type Display Name>`. Note: Runtimes are under construction and will be available soon. If <Runtime ID> is not specified, we assume default 'sandbox' runtime.
+   * @param {string} params.name Required. The unique identifier of this session entity type. Format: `projects/<Project ID>/agent/sessions/<Session ID>/entityTypes/<Entity Type Display Name>`, or `projects/<Project ID>/agent/environments/<Environment ID>/users/<User ID>/sessions /<Session ID>/entityTypes/<Entity Type Display Name>`. Note: Environments and users are under construction and will be available soon. If <Environment ID> is not specified, we assume default 'draft' environment. If <User ID> is not specified, we assume default '-' user.
    * @param {string=} params.updateMask Optional. The mask to control which fields get updated.
    * @param {().GoogleCloudDialogflowV2beta1SessionEntityType} params.resource Request body data
    * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudDialogflowV2beta1SessionEntityType>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$GoogleCloudDialogflowV2beta1SessionEntityType>,
       callback?: BodyResponseCallback<
           Schema$GoogleCloudDialogflowV2beta1SessionEntityType>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$GoogleCloudDialogflowV2beta1SessionEntityType>,
       callback?: BodyResponseCallback<
@@ -5339,13 +5359,13 @@ export class Resource$Projects$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$GoogleLongrunningOperation>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>):
diff --git a/src/apis/digitalassetlinks/v1.ts b/src/apis/digitalassetlinks/v1.ts
index d0a2d65ca0..e18e416c8a 100644
--- a/src/apis/digitalassetlinks/v1.ts
+++ b/src/apis/digitalassetlinks/v1.ts
@@ -290,14 +290,14 @@ export class Resource$Assetlinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  check(params: any, options?: MethodOptions):
+  check(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CheckResponse>;
   check(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CheckResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CheckResponse>,
       callback?: BodyResponseCallback<Schema$CheckResponse>): void;
   check(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CheckResponse>,
       callback?: BodyResponseCallback<Schema$CheckResponse>):
       void|AxiosPromise<Schema$CheckResponse> {
@@ -373,13 +373,14 @@ export class Resource$Statements {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$ListResponse>;
+  list(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$ListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListResponse>,
       callback?: BodyResponseCallback<Schema$ListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListResponse>,
       callback?: BodyResponseCallback<Schema$ListResponse>):
       void|AxiosPromise<Schema$ListResponse> {
diff --git a/src/apis/discovery/v1.ts b/src/apis/discovery/v1.ts
index a8ae3765e2..6ab0120748 100644
--- a/src/apis/discovery/v1.ts
+++ b/src/apis/discovery/v1.ts
@@ -401,14 +401,14 @@ export class Resource$Apis {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getRest(params: any, options?: MethodOptions):
+  getRest(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RestDescription>;
   getRest(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RestDescription>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RestDescription>,
       callback?: BodyResponseCallback<Schema$RestDescription>): void;
   getRest(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RestDescription>,
       callback?: BodyResponseCallback<Schema$RestDescription>):
       void|AxiosPromise<Schema$RestDescription> {
@@ -456,14 +456,14 @@ export class Resource$Apis {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DirectoryList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DirectoryList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DirectoryList>,
       callback?: BodyResponseCallback<Schema$DirectoryList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DirectoryList>,
       callback?: BodyResponseCallback<Schema$DirectoryList>):
       void|AxiosPromise<Schema$DirectoryList> {
diff --git a/src/apis/dlp/v2.ts b/src/apis/dlp/v2.ts
index 90c975dfa1..3e3fe62912 100644
--- a/src/apis/dlp/v2.ts
+++ b/src/apis/dlp/v2.ts
@@ -3392,17 +3392,17 @@ export class Resource$Infotypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2ListInfoTypesResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2ListInfoTypesResponse>,
       callback?:
           BodyResponseCallback<Schema$GooglePrivacyDlpV2ListInfoTypesResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2ListInfoTypesResponse>,
       callback?:
@@ -3482,17 +3482,17 @@ export class Resource$Organizations$Deidentifytemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2DeidentifyTemplate>;
   create(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2DeidentifyTemplate>,
       callback?:
           BodyResponseCallback<Schema$GooglePrivacyDlpV2DeidentifyTemplate>):
       void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2DeidentifyTemplate>,
       callback?:
@@ -3543,14 +3543,14 @@ export class Resource$Organizations$Deidentifytemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions):
+  delete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleProtobufEmpty>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>):
       void|AxiosPromise<Schema$GoogleProtobufEmpty> {
@@ -3596,15 +3596,15 @@ export class Resource$Organizations$Deidentifytemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions):
+  get(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2DeidentifyTemplate>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2DeidentifyTemplate>,
       callback?:
           BodyResponseCallback<Schema$GooglePrivacyDlpV2DeidentifyTemplate>):
       void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2DeidentifyTemplate>,
       callback?:
@@ -3656,16 +3656,16 @@ export class Resource$Organizations$Deidentifytemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2ListDeidentifyTemplatesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$GooglePrivacyDlpV2ListDeidentifyTemplatesResponse>,
       callback?: BodyResponseCallback<
           Schema$GooglePrivacyDlpV2ListDeidentifyTemplatesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$GooglePrivacyDlpV2ListDeidentifyTemplatesResponse>,
       callback?: BodyResponseCallback<
@@ -3718,17 +3718,17 @@ export class Resource$Organizations$Deidentifytemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2DeidentifyTemplate>;
   patch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2DeidentifyTemplate>,
       callback?:
           BodyResponseCallback<Schema$GooglePrivacyDlpV2DeidentifyTemplate>):
       void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2DeidentifyTemplate>,
       callback?:
@@ -3792,16 +3792,16 @@ export class Resource$Organizations$Inspecttemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2InspectTemplate>;
   create(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2InspectTemplate>,
       callback?:
           BodyResponseCallback<Schema$GooglePrivacyDlpV2InspectTemplate>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2InspectTemplate>,
       callback?:
@@ -3852,14 +3852,14 @@ export class Resource$Organizations$Inspecttemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions):
+  delete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleProtobufEmpty>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>):
       void|AxiosPromise<Schema$GoogleProtobufEmpty> {
@@ -3905,14 +3905,14 @@ export class Resource$Organizations$Inspecttemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions):
+  get(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2InspectTemplate>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2InspectTemplate>,
       callback?:
           BodyResponseCallback<Schema$GooglePrivacyDlpV2InspectTemplate>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2InspectTemplate>,
       callback?:
@@ -3964,16 +3964,16 @@ export class Resource$Organizations$Inspecttemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2ListInspectTemplatesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$GooglePrivacyDlpV2ListInspectTemplatesResponse>,
       callback?: BodyResponseCallback<
           Schema$GooglePrivacyDlpV2ListInspectTemplatesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$GooglePrivacyDlpV2ListInspectTemplatesResponse>,
       callback?: BodyResponseCallback<
@@ -4025,16 +4025,16 @@ export class Resource$Organizations$Inspecttemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2InspectTemplate>;
   patch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2InspectTemplate>,
       callback?:
           BodyResponseCallback<Schema$GooglePrivacyDlpV2InspectTemplate>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2InspectTemplate>,
       callback?:
@@ -4123,16 +4123,16 @@ export class Resource$Projects$Content {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  deidentify(params: any, options?: MethodOptions):
+  deidentify(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2DeidentifyContentResponse>;
   deidentify(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2DeidentifyContentResponse>,
       callback?: BodyResponseCallback<
           Schema$GooglePrivacyDlpV2DeidentifyContentResponse>): void;
   deidentify(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2DeidentifyContentResponse>,
       callback?: BodyResponseCallback<
@@ -4187,16 +4187,16 @@ export class Resource$Projects$Content {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  inspect(params: any, options?: MethodOptions):
+  inspect(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2InspectContentResponse>;
   inspect(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2InspectContentResponse>,
       callback?: BodyResponseCallback<
           Schema$GooglePrivacyDlpV2InspectContentResponse>): void;
   inspect(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2InspectContentResponse>,
       callback?: BodyResponseCallback<
@@ -4248,16 +4248,16 @@ export class Resource$Projects$Content {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  reidentify(params: any, options?: MethodOptions):
+  reidentify(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2ReidentifyContentResponse>;
   reidentify(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2ReidentifyContentResponse>,
       callback?: BodyResponseCallback<
           Schema$GooglePrivacyDlpV2ReidentifyContentResponse>): void;
   reidentify(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2ReidentifyContentResponse>,
       callback?: BodyResponseCallback<
@@ -4322,17 +4322,17 @@ export class Resource$Projects$Deidentifytemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2DeidentifyTemplate>;
   create(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2DeidentifyTemplate>,
       callback?:
           BodyResponseCallback<Schema$GooglePrivacyDlpV2DeidentifyTemplate>):
       void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2DeidentifyTemplate>,
       callback?:
@@ -4383,14 +4383,14 @@ export class Resource$Projects$Deidentifytemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions):
+  delete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleProtobufEmpty>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>):
       void|AxiosPromise<Schema$GoogleProtobufEmpty> {
@@ -4436,15 +4436,15 @@ export class Resource$Projects$Deidentifytemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions):
+  get(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2DeidentifyTemplate>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2DeidentifyTemplate>,
       callback?:
           BodyResponseCallback<Schema$GooglePrivacyDlpV2DeidentifyTemplate>):
       void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2DeidentifyTemplate>,
       callback?:
@@ -4496,16 +4496,16 @@ export class Resource$Projects$Deidentifytemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2ListDeidentifyTemplatesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$GooglePrivacyDlpV2ListDeidentifyTemplatesResponse>,
       callback?: BodyResponseCallback<
           Schema$GooglePrivacyDlpV2ListDeidentifyTemplatesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$GooglePrivacyDlpV2ListDeidentifyTemplatesResponse>,
       callback?: BodyResponseCallback<
@@ -4558,17 +4558,17 @@ export class Resource$Projects$Deidentifytemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2DeidentifyTemplate>;
   patch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2DeidentifyTemplate>,
       callback?:
           BodyResponseCallback<Schema$GooglePrivacyDlpV2DeidentifyTemplate>):
       void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2DeidentifyTemplate>,
       callback?:
@@ -4632,14 +4632,14 @@ export class Resource$Projects$Dlpjobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancel(params: any, options?: MethodOptions):
+  cancel(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleProtobufEmpty>;
   cancel(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>): void;
   cancel(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>):
       void|AxiosPromise<Schema$GoogleProtobufEmpty> {
@@ -4687,15 +4687,15 @@ export class Resource$Projects$Dlpjobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2DlpJob>;
   create(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2DlpJob>,
       callback?: BodyResponseCallback<Schema$GooglePrivacyDlpV2DlpJob>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2DlpJob>,
       callback?: BodyResponseCallback<Schema$GooglePrivacyDlpV2DlpJob>):
@@ -4745,14 +4745,14 @@ export class Resource$Projects$Dlpjobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions):
+  delete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleProtobufEmpty>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>):
       void|AxiosPromise<Schema$GoogleProtobufEmpty> {
@@ -4798,13 +4798,13 @@ export class Resource$Projects$Dlpjobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$GooglePrivacyDlpV2DlpJob>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2DlpJob>,
       callback?: BodyResponseCallback<Schema$GooglePrivacyDlpV2DlpJob>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2DlpJob>,
       callback?: BodyResponseCallback<Schema$GooglePrivacyDlpV2DlpJob>):
@@ -4855,17 +4855,17 @@ export class Resource$Projects$Dlpjobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2ListDlpJobsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2ListDlpJobsResponse>,
       callback?:
           BodyResponseCallback<Schema$GooglePrivacyDlpV2ListDlpJobsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2ListDlpJobsResponse>,
       callback?:
@@ -4931,17 +4931,17 @@ export class Resource$Projects$Image {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  redact(params: any, options?: MethodOptions):
+  redact(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2RedactImageResponse>;
   redact(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2RedactImageResponse>,
       callback?:
           BodyResponseCallback<Schema$GooglePrivacyDlpV2RedactImageResponse>):
       void;
   redact(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2RedactImageResponse>,
       callback?:
@@ -5006,16 +5006,16 @@ export class Resource$Projects$Inspecttemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2InspectTemplate>;
   create(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2InspectTemplate>,
       callback?:
           BodyResponseCallback<Schema$GooglePrivacyDlpV2InspectTemplate>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2InspectTemplate>,
       callback?:
@@ -5066,14 +5066,14 @@ export class Resource$Projects$Inspecttemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions):
+  delete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleProtobufEmpty>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>):
       void|AxiosPromise<Schema$GoogleProtobufEmpty> {
@@ -5119,14 +5119,14 @@ export class Resource$Projects$Inspecttemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions):
+  get(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2InspectTemplate>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2InspectTemplate>,
       callback?:
           BodyResponseCallback<Schema$GooglePrivacyDlpV2InspectTemplate>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2InspectTemplate>,
       callback?:
@@ -5178,16 +5178,16 @@ export class Resource$Projects$Inspecttemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2ListInspectTemplatesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$GooglePrivacyDlpV2ListInspectTemplatesResponse>,
       callback?: BodyResponseCallback<
           Schema$GooglePrivacyDlpV2ListInspectTemplatesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$GooglePrivacyDlpV2ListInspectTemplatesResponse>,
       callback?: BodyResponseCallback<
@@ -5239,16 +5239,16 @@ export class Resource$Projects$Inspecttemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2InspectTemplate>;
   patch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2InspectTemplate>,
       callback?:
           BodyResponseCallback<Schema$GooglePrivacyDlpV2InspectTemplate>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2InspectTemplate>,
       callback?:
@@ -5312,16 +5312,16 @@ export class Resource$Projects$Jobtriggers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2JobTrigger>;
   create(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2JobTrigger>,
       callback?: BodyResponseCallback<Schema$GooglePrivacyDlpV2JobTrigger>):
       void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2JobTrigger>,
       callback?: BodyResponseCallback<Schema$GooglePrivacyDlpV2JobTrigger>):
@@ -5370,14 +5370,14 @@ export class Resource$Projects$Jobtriggers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions):
+  delete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleProtobufEmpty>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>):
       void|AxiosPromise<Schema$GoogleProtobufEmpty> {
@@ -5423,14 +5423,14 @@ export class Resource$Projects$Jobtriggers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions):
+  get(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2JobTrigger>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2JobTrigger>,
       callback?: BodyResponseCallback<Schema$GooglePrivacyDlpV2JobTrigger>):
       void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2JobTrigger>,
       callback?: BodyResponseCallback<Schema$GooglePrivacyDlpV2JobTrigger>):
@@ -5481,16 +5481,16 @@ export class Resource$Projects$Jobtriggers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2ListJobTriggersResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2ListJobTriggersResponse>,
       callback?: BodyResponseCallback<
           Schema$GooglePrivacyDlpV2ListJobTriggersResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2ListJobTriggersResponse>,
       callback?: BodyResponseCallback<
@@ -5542,16 +5542,16 @@ export class Resource$Projects$Jobtriggers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2JobTrigger>;
   patch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2JobTrigger>,
       callback?: BodyResponseCallback<Schema$GooglePrivacyDlpV2JobTrigger>):
       void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2JobTrigger>,
       callback?: BodyResponseCallback<Schema$GooglePrivacyDlpV2JobTrigger>):
diff --git a/src/apis/dlp/v2beta1.ts b/src/apis/dlp/v2beta1.ts
index 8964c3caa8..74d46028e3 100644
--- a/src/apis/dlp/v2beta1.ts
+++ b/src/apis/dlp/v2beta1.ts
@@ -2034,16 +2034,16 @@ export class Resource$Content {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  deidentify(params: any, options?: MethodOptions):
+  deidentify(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2beta1DeidentifyContentResponse>;
   deidentify(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta1DeidentifyContentResponse>,
       callback?: BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta1DeidentifyContentResponse>): void;
   deidentify(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta1DeidentifyContentResponse>,
       callback?: BodyResponseCallback<
@@ -2095,16 +2095,16 @@ export class Resource$Content {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  inspect(params: any, options?: MethodOptions):
+  inspect(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2beta1InspectContentResponse>;
   inspect(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta1InspectContentResponse>,
       callback?: BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta1InspectContentResponse>): void;
   inspect(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta1InspectContentResponse>,
       callback?: BodyResponseCallback<
@@ -2156,16 +2156,16 @@ export class Resource$Content {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  redact(params: any, options?: MethodOptions):
+  redact(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2beta1RedactContentResponse>;
   redact(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta1RedactContentResponse>,
       callback?: BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta1RedactContentResponse>): void;
   redact(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta1RedactContentResponse>,
       callback?: BodyResponseCallback<
@@ -2229,15 +2229,15 @@ export class Resource$Datasource {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  analyze(params: any, options?: MethodOptions):
+  analyze(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleLongrunningOperation>;
   analyze(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
   analyze(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>):
@@ -2315,14 +2315,14 @@ export class Resource$Inspect$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancel(params: any, options?: MethodOptions):
+  cancel(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleProtobufEmpty>;
   cancel(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>): void;
   cancel(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>):
       void|AxiosPromise<Schema$GoogleProtobufEmpty> {
@@ -2370,15 +2370,15 @@ export class Resource$Inspect$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleLongrunningOperation>;
   create(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>):
@@ -2426,14 +2426,14 @@ export class Resource$Inspect$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions):
+  delete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleProtobufEmpty>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>):
       void|AxiosPromise<Schema$GoogleProtobufEmpty> {
@@ -2481,13 +2481,13 @@ export class Resource$Inspect$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$GoogleLongrunningOperation>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>):
@@ -2537,17 +2537,17 @@ export class Resource$Inspect$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleLongrunningListOperationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningListOperationsResponse>,
       callback?:
           BodyResponseCallback<Schema$GoogleLongrunningListOperationsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningListOperationsResponse>,
       callback?:
@@ -2625,16 +2625,16 @@ export class Resource$Inspect$Results$Findings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2beta1ListInspectFindingsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta1ListInspectFindingsResponse>,
       callback?: BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta1ListInspectFindingsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta1ListInspectFindingsResponse>,
       callback?: BodyResponseCallback<
@@ -2717,14 +2717,14 @@ export class Resource$Riskanalysis$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancel(params: any, options?: MethodOptions):
+  cancel(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleProtobufEmpty>;
   cancel(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>): void;
   cancel(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>):
       void|AxiosPromise<Schema$GoogleProtobufEmpty> {
@@ -2771,14 +2771,14 @@ export class Resource$Riskanalysis$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions):
+  delete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleProtobufEmpty>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>):
       void|AxiosPromise<Schema$GoogleProtobufEmpty> {
@@ -2826,13 +2826,13 @@ export class Resource$Riskanalysis$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$GoogleLongrunningOperation>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningOperation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunningOperation>):
@@ -2882,17 +2882,17 @@ export class Resource$Riskanalysis$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleLongrunningListOperationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningListOperationsResponse>,
       callback?:
           BodyResponseCallback<Schema$GoogleLongrunningListOperationsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunningListOperationsResponse>,
       callback?:
@@ -2957,16 +2957,16 @@ export class Resource$Rootcategories {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2beta1ListRootCategoriesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta1ListRootCategoriesResponse>,
       callback?: BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta1ListRootCategoriesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta1ListRootCategoriesResponse>,
       callback?: BodyResponseCallback<
@@ -3030,16 +3030,16 @@ export class Resource$Rootcategories$Infotypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2beta1ListInfoTypesResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta1ListInfoTypesResponse>,
       callback?: BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta1ListInfoTypesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta1ListInfoTypesResponse>,
       callback?: BodyResponseCallback<
diff --git a/src/apis/dlp/v2beta2.ts b/src/apis/dlp/v2beta2.ts
index 6963638380..c98dc57e88 100644
--- a/src/apis/dlp/v2beta2.ts
+++ b/src/apis/dlp/v2beta2.ts
@@ -3388,16 +3388,16 @@ export class Resource$Infotypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2beta2ListInfoTypesResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2ListInfoTypesResponse>,
       callback?: BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta2ListInfoTypesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2ListInfoTypesResponse>,
       callback?: BodyResponseCallback<
@@ -3477,16 +3477,16 @@ export class Resource$Organizations$Deidentifytemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2beta2DeidentifyTemplate>;
   create(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2DeidentifyTemplate>,
       callback?: BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta2DeidentifyTemplate>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2DeidentifyTemplate>,
       callback?: BodyResponseCallback<
@@ -3537,14 +3537,14 @@ export class Resource$Organizations$Deidentifytemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions):
+  delete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleProtobufEmpty>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>):
       void|AxiosPromise<Schema$GoogleProtobufEmpty> {
@@ -3590,14 +3590,14 @@ export class Resource$Organizations$Deidentifytemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions):
+  get(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2beta2DeidentifyTemplate>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2DeidentifyTemplate>,
       callback?: BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta2DeidentifyTemplate>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2DeidentifyTemplate>,
       callback?: BodyResponseCallback<
@@ -3649,16 +3649,16 @@ export class Resource$Organizations$Deidentifytemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<
+  list(params?: any, options?: MethodOptions): AxiosPromise<
       Schema$GooglePrivacyDlpV2beta2ListDeidentifyTemplatesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta2ListDeidentifyTemplatesResponse>,
       callback?: BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta2ListDeidentifyTemplatesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta2ListDeidentifyTemplatesResponse>,
       callback?: BodyResponseCallback<
@@ -3713,16 +3713,16 @@ export class Resource$Organizations$Deidentifytemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2beta2DeidentifyTemplate>;
   patch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2DeidentifyTemplate>,
       callback?: BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta2DeidentifyTemplate>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2DeidentifyTemplate>,
       callback?: BodyResponseCallback<
@@ -3786,17 +3786,17 @@ export class Resource$Organizations$Inspecttemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2beta2InspectTemplate>;
   create(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2InspectTemplate>,
       callback?:
           BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2InspectTemplate>):
       void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2InspectTemplate>,
       callback?:
@@ -3847,14 +3847,14 @@ export class Resource$Organizations$Inspecttemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions):
+  delete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleProtobufEmpty>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>):
       void|AxiosPromise<Schema$GoogleProtobufEmpty> {
@@ -3900,15 +3900,15 @@ export class Resource$Organizations$Inspecttemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions):
+  get(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2beta2InspectTemplate>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2InspectTemplate>,
       callback?:
           BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2InspectTemplate>):
       void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2InspectTemplate>,
       callback?:
@@ -3960,16 +3960,16 @@ export class Resource$Organizations$Inspecttemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2beta2ListInspectTemplatesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta2ListInspectTemplatesResponse>,
       callback?: BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta2ListInspectTemplatesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta2ListInspectTemplatesResponse>,
       callback?: BodyResponseCallback<
@@ -4023,17 +4023,17 @@ export class Resource$Organizations$Inspecttemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2beta2InspectTemplate>;
   patch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2InspectTemplate>,
       callback?:
           BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2InspectTemplate>):
       void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2InspectTemplate>,
       callback?:
@@ -4124,16 +4124,16 @@ export class Resource$Projects$Content {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  deidentify(params: any, options?: MethodOptions):
+  deidentify(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2beta2DeidentifyContentResponse>;
   deidentify(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta2DeidentifyContentResponse>,
       callback?: BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta2DeidentifyContentResponse>): void;
   deidentify(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta2DeidentifyContentResponse>,
       callback?: BodyResponseCallback<
@@ -4188,16 +4188,16 @@ export class Resource$Projects$Content {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  inspect(params: any, options?: MethodOptions):
+  inspect(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2beta2InspectContentResponse>;
   inspect(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta2InspectContentResponse>,
       callback?: BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta2InspectContentResponse>): void;
   inspect(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta2InspectContentResponse>,
       callback?: BodyResponseCallback<
@@ -4249,16 +4249,16 @@ export class Resource$Projects$Content {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  reidentify(params: any, options?: MethodOptions):
+  reidentify(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2beta2ReidentifyContentResponse>;
   reidentify(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta2ReidentifyContentResponse>,
       callback?: BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta2ReidentifyContentResponse>): void;
   reidentify(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta2ReidentifyContentResponse>,
       callback?: BodyResponseCallback<
@@ -4324,16 +4324,16 @@ export class Resource$Projects$Datasource {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  analyze(params: any, options?: MethodOptions):
+  analyze(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2beta2DlpJob>;
   analyze(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2DlpJob>,
       callback?: BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2DlpJob>):
       void;
   analyze(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2DlpJob>,
       callback?: BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2DlpJob>):
@@ -4384,16 +4384,16 @@ export class Resource$Projects$Datasource {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  inspect(params: any, options?: MethodOptions):
+  inspect(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2beta2DlpJob>;
   inspect(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2DlpJob>,
       callback?: BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2DlpJob>):
       void;
   inspect(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2DlpJob>,
       callback?: BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2DlpJob>):
@@ -4456,16 +4456,16 @@ export class Resource$Projects$Deidentifytemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2beta2DeidentifyTemplate>;
   create(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2DeidentifyTemplate>,
       callback?: BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta2DeidentifyTemplate>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2DeidentifyTemplate>,
       callback?: BodyResponseCallback<
@@ -4516,14 +4516,14 @@ export class Resource$Projects$Deidentifytemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions):
+  delete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleProtobufEmpty>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>):
       void|AxiosPromise<Schema$GoogleProtobufEmpty> {
@@ -4569,14 +4569,14 @@ export class Resource$Projects$Deidentifytemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions):
+  get(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2beta2DeidentifyTemplate>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2DeidentifyTemplate>,
       callback?: BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta2DeidentifyTemplate>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2DeidentifyTemplate>,
       callback?: BodyResponseCallback<
@@ -4628,16 +4628,16 @@ export class Resource$Projects$Deidentifytemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<
+  list(params?: any, options?: MethodOptions): AxiosPromise<
       Schema$GooglePrivacyDlpV2beta2ListDeidentifyTemplatesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta2ListDeidentifyTemplatesResponse>,
       callback?: BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta2ListDeidentifyTemplatesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta2ListDeidentifyTemplatesResponse>,
       callback?: BodyResponseCallback<
@@ -4692,16 +4692,16 @@ export class Resource$Projects$Deidentifytemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2beta2DeidentifyTemplate>;
   patch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2DeidentifyTemplate>,
       callback?: BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta2DeidentifyTemplate>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2DeidentifyTemplate>,
       callback?: BodyResponseCallback<
@@ -4766,14 +4766,14 @@ export class Resource$Projects$Dlpjobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancel(params: any, options?: MethodOptions):
+  cancel(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleProtobufEmpty>;
   cancel(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>): void;
   cancel(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>):
       void|AxiosPromise<Schema$GoogleProtobufEmpty> {
@@ -4822,14 +4822,14 @@ export class Resource$Projects$Dlpjobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions):
+  delete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleProtobufEmpty>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>):
       void|AxiosPromise<Schema$GoogleProtobufEmpty> {
@@ -4875,14 +4875,14 @@ export class Resource$Projects$Dlpjobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions):
+  get(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2beta2DlpJob>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2DlpJob>,
       callback?: BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2DlpJob>):
       void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2DlpJob>,
       callback?: BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2DlpJob>):
@@ -4934,16 +4934,16 @@ export class Resource$Projects$Dlpjobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2beta2ListDlpJobsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2ListDlpJobsResponse>,
       callback?: BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta2ListDlpJobsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2ListDlpJobsResponse>,
       callback?: BodyResponseCallback<
@@ -5009,16 +5009,16 @@ export class Resource$Projects$Image {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  redact(params: any, options?: MethodOptions):
+  redact(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2beta2RedactImageResponse>;
   redact(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2RedactImageResponse>,
       callback?: BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta2RedactImageResponse>): void;
   redact(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2RedactImageResponse>,
       callback?: BodyResponseCallback<
@@ -5083,17 +5083,17 @@ export class Resource$Projects$Inspecttemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2beta2InspectTemplate>;
   create(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2InspectTemplate>,
       callback?:
           BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2InspectTemplate>):
       void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2InspectTemplate>,
       callback?:
@@ -5144,14 +5144,14 @@ export class Resource$Projects$Inspecttemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions):
+  delete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleProtobufEmpty>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>):
       void|AxiosPromise<Schema$GoogleProtobufEmpty> {
@@ -5197,15 +5197,15 @@ export class Resource$Projects$Inspecttemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions):
+  get(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2beta2InspectTemplate>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2InspectTemplate>,
       callback?:
           BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2InspectTemplate>):
       void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2InspectTemplate>,
       callback?:
@@ -5257,16 +5257,16 @@ export class Resource$Projects$Inspecttemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2beta2ListInspectTemplatesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta2ListInspectTemplatesResponse>,
       callback?: BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta2ListInspectTemplatesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta2ListInspectTemplatesResponse>,
       callback?: BodyResponseCallback<
@@ -5320,17 +5320,17 @@ export class Resource$Projects$Inspecttemplates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2beta2InspectTemplate>;
   patch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2InspectTemplate>,
       callback?:
           BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2InspectTemplate>):
       void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2InspectTemplate>,
       callback?:
@@ -5394,16 +5394,16 @@ export class Resource$Projects$Jobtriggers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2beta2JobTrigger>;
   create(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2JobTrigger>,
       callback?:
           BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2JobTrigger>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2JobTrigger>,
       callback?:
@@ -5454,14 +5454,14 @@ export class Resource$Projects$Jobtriggers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions):
+  delete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleProtobufEmpty>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GoogleProtobufEmpty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobufEmpty>):
       void|AxiosPromise<Schema$GoogleProtobufEmpty> {
@@ -5507,14 +5507,14 @@ export class Resource$Projects$Jobtriggers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions):
+  get(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2beta2JobTrigger>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2JobTrigger>,
       callback?:
           BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2JobTrigger>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2JobTrigger>,
       callback?:
@@ -5567,16 +5567,16 @@ export class Resource$Projects$Jobtriggers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2beta2ListJobTriggersResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta2ListJobTriggersResponse>,
       callback?: BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta2ListJobTriggersResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$GooglePrivacyDlpV2beta2ListJobTriggersResponse>,
       callback?: BodyResponseCallback<
@@ -5628,16 +5628,16 @@ export class Resource$Projects$Jobtriggers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GooglePrivacyDlpV2beta2JobTrigger>;
   patch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2JobTrigger>,
       callback?:
           BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2JobTrigger>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GooglePrivacyDlpV2beta2JobTrigger>,
       callback?:
diff --git a/src/apis/dns/v1.ts b/src/apis/dns/v1.ts
index 0e924994fc..eb2ec85c70 100644
--- a/src/apis/dns/v1.ts
+++ b/src/apis/dns/v1.ts
@@ -678,12 +678,12 @@ export class Resource$Changes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Change>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Change>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Change>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Change>,
       callback?: BodyResponseCallback<Schema$Change>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Change>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Change>,
       callback?: BodyResponseCallback<Schema$Change>):
       void|AxiosPromise<Schema$Change> {
     if (typeof options === 'function') {
@@ -794,10 +794,10 @@ export class Resource$Changes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Change>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Change>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Change>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Change>,
       callback?: BodyResponseCallback<Schema$Change>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Change>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Change>,
       callback?: BodyResponseCallback<Schema$Change>):
       void|AxiosPromise<Schema$Change> {
     if (typeof options === 'function') {
@@ -919,14 +919,14 @@ export class Resource$Changes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ChangesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ChangesListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ChangesListResponse>,
       callback?: BodyResponseCallback<Schema$ChangesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ChangesListResponse>,
       callback?: BodyResponseCallback<Schema$ChangesListResponse>):
       void|AxiosPromise<Schema$ChangesListResponse> {
@@ -991,10 +991,10 @@ export class Resource$Dnskeys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$DnsKey>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$DnsKey>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$DnsKey>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$DnsKey>,
       callback?: BodyResponseCallback<Schema$DnsKey>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$DnsKey>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$DnsKey>,
       callback?: BodyResponseCallback<Schema$DnsKey>):
       void|AxiosPromise<Schema$DnsKey> {
     if (typeof options === 'function') {
@@ -1046,14 +1046,14 @@ export class Resource$Dnskeys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DnsKeysListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DnsKeysListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DnsKeysListResponse>,
       callback?: BodyResponseCallback<Schema$DnsKeysListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DnsKeysListResponse>,
       callback?: BodyResponseCallback<Schema$DnsKeysListResponse>):
       void|AxiosPromise<Schema$DnsKeysListResponse> {
@@ -1117,11 +1117,11 @@ export class Resource$Managedzoneoperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1174,16 +1174,16 @@ export class Resource$Managedzoneoperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ManagedZoneOperationsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ManagedZoneOperationsListResponse>,
       callback?:
           BodyResponseCallback<Schema$ManagedZoneOperationsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ManagedZoneOperationsListResponse>,
       callback?:
@@ -1306,14 +1306,14 @@ export class Resource$Managedzones {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ManagedZone>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ManagedZone>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ManagedZone>,
       callback?: BodyResponseCallback<Schema$ManagedZone>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ManagedZone>,
       callback?: BodyResponseCallback<Schema$ManagedZone>):
       void|AxiosPromise<Schema$ManagedZone> {
@@ -1415,12 +1415,12 @@ export class Resource$Managedzones {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1524,11 +1524,11 @@ export class Resource$Managedzones {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$ManagedZone>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ManagedZone>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$ManagedZone>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ManagedZone>,
       callback?: BodyResponseCallback<Schema$ManagedZone>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ManagedZone>,
       callback?: BodyResponseCallback<Schema$ManagedZone>):
       void|AxiosPromise<Schema$ManagedZone> {
@@ -1645,15 +1645,15 @@ export class Resource$Managedzones {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ManagedZonesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ManagedZonesListResponse>,
       callback?: BodyResponseCallback<Schema$ManagedZonesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ManagedZonesListResponse>,
       callback?: BodyResponseCallback<Schema$ManagedZonesListResponse>):
@@ -1704,13 +1704,13 @@ export class Resource$Managedzones {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1761,13 +1761,13 @@ export class Resource$Managedzones {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1880,10 +1880,12 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Project>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Project>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Project>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Project>,
       callback?: BodyResponseCallback<Schema$Project>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Project>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Project>,
       callback?: BodyResponseCallback<Schema$Project>):
       void|AxiosPromise<Schema$Project> {
     if (typeof options === 'function') {
@@ -2016,16 +2018,16 @@ export class Resource$Resourcerecordsets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ResourceRecordSetsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ResourceRecordSetsListResponse>,
       callback?: BodyResponseCallback<Schema$ResourceRecordSetsListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ResourceRecordSetsListResponse>,
       callback?: BodyResponseCallback<Schema$ResourceRecordSetsListResponse>):
diff --git a/src/apis/dns/v1beta2.ts b/src/apis/dns/v1beta2.ts
index a4b1f8f051..312f5ddba8 100644
--- a/src/apis/dns/v1beta2.ts
+++ b/src/apis/dns/v1beta2.ts
@@ -618,12 +618,12 @@ export class Resource$Changes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Change>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Change>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Change>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Change>,
       callback?: BodyResponseCallback<Schema$Change>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Change>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Change>,
       callback?: BodyResponseCallback<Schema$Change>):
       void|AxiosPromise<Schema$Change> {
     if (typeof options === 'function') {
@@ -674,10 +674,10 @@ export class Resource$Changes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Change>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Change>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Change>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Change>,
       callback?: BodyResponseCallback<Schema$Change>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Change>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Change>,
       callback?: BodyResponseCallback<Schema$Change>):
       void|AxiosPromise<Schema$Change> {
     if (typeof options === 'function') {
@@ -730,14 +730,14 @@ export class Resource$Changes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ChangesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ChangesListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ChangesListResponse>,
       callback?: BodyResponseCallback<Schema$ChangesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ChangesListResponse>,
       callback?: BodyResponseCallback<Schema$ChangesListResponse>):
       void|AxiosPromise<Schema$ChangesListResponse> {
@@ -802,10 +802,10 @@ export class Resource$Dnskeys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$DnsKey>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$DnsKey>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$DnsKey>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$DnsKey>,
       callback?: BodyResponseCallback<Schema$DnsKey>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$DnsKey>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$DnsKey>,
       callback?: BodyResponseCallback<Schema$DnsKey>):
       void|AxiosPromise<Schema$DnsKey> {
     if (typeof options === 'function') {
@@ -857,14 +857,14 @@ export class Resource$Dnskeys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DnsKeysListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DnsKeysListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DnsKeysListResponse>,
       callback?: BodyResponseCallback<Schema$DnsKeysListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DnsKeysListResponse>,
       callback?: BodyResponseCallback<Schema$DnsKeysListResponse>):
       void|AxiosPromise<Schema$DnsKeysListResponse> {
@@ -928,11 +928,11 @@ export class Resource$Managedzoneoperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -985,16 +985,16 @@ export class Resource$Managedzoneoperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ManagedZoneOperationsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ManagedZoneOperationsListResponse>,
       callback?:
           BodyResponseCallback<Schema$ManagedZoneOperationsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ManagedZoneOperationsListResponse>,
       callback?:
@@ -1061,14 +1061,14 @@ export class Resource$Managedzones {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ManagedZone>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ManagedZone>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ManagedZone>,
       callback?: BodyResponseCallback<Schema$ManagedZone>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ManagedZone>,
       callback?: BodyResponseCallback<Schema$ManagedZone>):
       void|AxiosPromise<Schema$ManagedZone> {
@@ -1117,12 +1117,12 @@ export class Resource$Managedzones {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1170,11 +1170,11 @@ export class Resource$Managedzones {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$ManagedZone>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ManagedZone>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$ManagedZone>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ManagedZone>,
       callback?: BodyResponseCallback<Schema$ManagedZone>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ManagedZone>,
       callback?: BodyResponseCallback<Schema$ManagedZone>):
       void|AxiosPromise<Schema$ManagedZone> {
@@ -1225,15 +1225,15 @@ export class Resource$Managedzones {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ManagedZonesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ManagedZonesListResponse>,
       callback?: BodyResponseCallback<Schema$ManagedZonesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ManagedZonesListResponse>,
       callback?: BodyResponseCallback<Schema$ManagedZonesListResponse>):
@@ -1284,13 +1284,13 @@ export class Resource$Managedzones {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1341,13 +1341,13 @@ export class Resource$Managedzones {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1408,10 +1408,12 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Project>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Project>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Project>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Project>,
       callback?: BodyResponseCallback<Schema$Project>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Project>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Project>,
       callback?: BodyResponseCallback<Schema$Project>):
       void|AxiosPromise<Schema$Project> {
     if (typeof options === 'function') {
@@ -1475,16 +1477,16 @@ export class Resource$Resourcerecordsets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ResourceRecordSetsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ResourceRecordSetsListResponse>,
       callback?: BodyResponseCallback<Schema$ResourceRecordSetsListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ResourceRecordSetsListResponse>,
       callback?: BodyResponseCallback<Schema$ResourceRecordSetsListResponse>):
diff --git a/src/apis/dns/v2beta1.ts b/src/apis/dns/v2beta1.ts
index c8c4eecad1..b5d7eea614 100644
--- a/src/apis/dns/v2beta1.ts
+++ b/src/apis/dns/v2beta1.ts
@@ -678,12 +678,12 @@ export class Resource$Changes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Change>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Change>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Change>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Change>,
       callback?: BodyResponseCallback<Schema$Change>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Change>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Change>,
       callback?: BodyResponseCallback<Schema$Change>):
       void|AxiosPromise<Schema$Change> {
     if (typeof options === 'function') {
@@ -794,10 +794,10 @@ export class Resource$Changes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Change>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Change>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Change>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Change>,
       callback?: BodyResponseCallback<Schema$Change>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Change>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Change>,
       callback?: BodyResponseCallback<Schema$Change>):
       void|AxiosPromise<Schema$Change> {
     if (typeof options === 'function') {
@@ -919,14 +919,14 @@ export class Resource$Changes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ChangesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ChangesListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ChangesListResponse>,
       callback?: BodyResponseCallback<Schema$ChangesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ChangesListResponse>,
       callback?: BodyResponseCallback<Schema$ChangesListResponse>):
       void|AxiosPromise<Schema$ChangesListResponse> {
@@ -1050,10 +1050,10 @@ export class Resource$Dnskeys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$DnsKey>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$DnsKey>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$DnsKey>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$DnsKey>,
       callback?: BodyResponseCallback<Schema$DnsKey>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$DnsKey>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$DnsKey>,
       callback?: BodyResponseCallback<Schema$DnsKey>):
       void|AxiosPromise<Schema$DnsKey> {
     if (typeof options === 'function') {
@@ -1174,14 +1174,14 @@ export class Resource$Dnskeys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DnsKeysListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DnsKeysListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DnsKeysListResponse>,
       callback?: BodyResponseCallback<Schema$DnsKeysListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DnsKeysListResponse>,
       callback?: BodyResponseCallback<Schema$DnsKeysListResponse>):
       void|AxiosPromise<Schema$DnsKeysListResponse> {
@@ -1303,11 +1303,11 @@ export class Resource$Managedzoneoperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1428,16 +1428,16 @@ export class Resource$Managedzoneoperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ManagedZoneOperationsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ManagedZoneOperationsListResponse>,
       callback?:
           BodyResponseCallback<Schema$ManagedZoneOperationsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ManagedZoneOperationsListResponse>,
       callback?:
@@ -1560,14 +1560,14 @@ export class Resource$Managedzones {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ManagedZone>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ManagedZone>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ManagedZone>,
       callback?: BodyResponseCallback<Schema$ManagedZone>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ManagedZone>,
       callback?: BodyResponseCallback<Schema$ManagedZone>):
       void|AxiosPromise<Schema$ManagedZone> {
@@ -1672,12 +1672,12 @@ export class Resource$Managedzones {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1781,11 +1781,11 @@ export class Resource$Managedzones {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$ManagedZone>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ManagedZone>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$ManagedZone>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ManagedZone>,
       callback?: BodyResponseCallback<Schema$ManagedZone>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ManagedZone>,
       callback?: BodyResponseCallback<Schema$ManagedZone>):
       void|AxiosPromise<Schema$ManagedZone> {
@@ -1902,15 +1902,15 @@ export class Resource$Managedzones {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ManagedZonesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ManagedZonesListResponse>,
       callback?: BodyResponseCallback<Schema$ManagedZonesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ManagedZonesListResponse>,
       callback?: BodyResponseCallback<Schema$ManagedZonesListResponse>):
@@ -2023,13 +2023,13 @@ export class Resource$Managedzones {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2142,13 +2142,13 @@ export class Resource$Managedzones {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2261,10 +2261,12 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Project>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Project>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Project>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Project>,
       callback?: BodyResponseCallback<Schema$Project>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Project>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Project>,
       callback?: BodyResponseCallback<Schema$Project>):
       void|AxiosPromise<Schema$Project> {
     if (typeof options === 'function') {
@@ -2397,16 +2399,16 @@ export class Resource$Resourcerecordsets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ResourceRecordSetsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ResourceRecordSetsListResponse>,
       callback?: BodyResponseCallback<Schema$ResourceRecordSetsListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ResourceRecordSetsListResponse>,
       callback?: BodyResponseCallback<Schema$ResourceRecordSetsListResponse>):
diff --git a/src/apis/doubleclickbidmanager/v1.ts b/src/apis/doubleclickbidmanager/v1.ts
index 027ca75071..beec3da607 100644
--- a/src/apis/doubleclickbidmanager/v1.ts
+++ b/src/apis/doubleclickbidmanager/v1.ts
@@ -543,15 +543,15 @@ export class Resource$Lineitems {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  downloadlineitems(params: any, options?: MethodOptions):
+  downloadlineitems(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DownloadLineItemsResponse>;
   downloadlineitems(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$DownloadLineItemsResponse>,
       callback?: BodyResponseCallback<Schema$DownloadLineItemsResponse>): void;
   downloadlineitems(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$DownloadLineItemsResponse>,
       callback?: BodyResponseCallback<Schema$DownloadLineItemsResponse>):
@@ -601,15 +601,15 @@ export class Resource$Lineitems {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  uploadlineitems(params: any, options?: MethodOptions):
+  uploadlineitems(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$UploadLineItemsResponse>;
   uploadlineitems(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$UploadLineItemsResponse>,
       callback?: BodyResponseCallback<Schema$UploadLineItemsResponse>): void;
   uploadlineitems(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$UploadLineItemsResponse>,
       callback?: BodyResponseCallback<Schema$UploadLineItemsResponse>):
@@ -670,12 +670,13 @@ export class Resource$Queries {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  createquery(params: any, options?: MethodOptions): AxiosPromise<Schema$Query>;
+  createquery(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Query>;
   createquery(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Query>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Query>,
       callback?: BodyResponseCallback<Schema$Query>): void;
   createquery(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Query>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Query>,
       callback?: BodyResponseCallback<Schema$Query>):
       void|AxiosPromise<Schema$Query> {
     if (typeof options === 'function') {
@@ -721,12 +722,12 @@ export class Resource$Queries {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  deletequery(params: any, options?: MethodOptions): AxiosPromise<void>;
+  deletequery(params?: any, options?: MethodOptions): AxiosPromise<void>;
   deletequery(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   deletequery(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -771,12 +772,12 @@ export class Resource$Queries {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getquery(params: any, options?: MethodOptions): AxiosPromise<Schema$Query>;
+  getquery(params?: any, options?: MethodOptions): AxiosPromise<Schema$Query>;
   getquery(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Query>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Query>,
       callback?: BodyResponseCallback<Schema$Query>): void;
   getquery(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Query>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Query>,
       callback?: BodyResponseCallback<Schema$Query>):
       void|AxiosPromise<Schema$Query> {
     if (typeof options === 'function') {
@@ -821,14 +822,14 @@ export class Resource$Queries {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listqueries(params: any, options?: MethodOptions):
+  listqueries(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListQueriesResponse>;
   listqueries(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListQueriesResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListQueriesResponse>,
       callback?: BodyResponseCallback<Schema$ListQueriesResponse>): void;
   listqueries(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListQueriesResponse>,
       callback?: BodyResponseCallback<Schema$ListQueriesResponse>):
       void|AxiosPromise<Schema$ListQueriesResponse> {
@@ -876,12 +877,12 @@ export class Resource$Queries {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  runquery(params: any, options?: MethodOptions): AxiosPromise<void>;
+  runquery(params?: any, options?: MethodOptions): AxiosPromise<void>;
   runquery(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   runquery(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -938,14 +939,14 @@ export class Resource$Reports {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listreports(params: any, options?: MethodOptions):
+  listreports(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListReportsResponse>;
   listreports(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListReportsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListReportsResponse>,
       callback?: BodyResponseCallback<Schema$ListReportsResponse>): void;
   listreports(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListReportsResponse>,
       callback?: BodyResponseCallback<Schema$ListReportsResponse>):
       void|AxiosPromise<Schema$ListReportsResponse> {
@@ -1005,14 +1006,14 @@ export class Resource$Sdf {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  download(params: any, options?: MethodOptions):
+  download(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DownloadResponse>;
   download(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DownloadResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DownloadResponse>,
       callback?: BodyResponseCallback<Schema$DownloadResponse>): void;
   download(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DownloadResponse>,
       callback?: BodyResponseCallback<Schema$DownloadResponse>):
       void|AxiosPromise<Schema$DownloadResponse> {
diff --git a/src/apis/doubleclicksearch/v2.ts b/src/apis/doubleclicksearch/v2.ts
index 931162bea0..96ecd35d56 100644
--- a/src/apis/doubleclicksearch/v2.ts
+++ b/src/apis/doubleclicksearch/v2.ts
@@ -596,12 +596,12 @@ export class Resource$Conversion {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$ConversionList>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ConversionList>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ConversionList>,
       callback?: BodyResponseCallback<Schema$ConversionList>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ConversionList>,
       callback?: BodyResponseCallback<Schema$ConversionList>):
       void|AxiosPromise<Schema$ConversionList> {
@@ -653,14 +653,14 @@ export class Resource$Conversion {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ConversionList>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ConversionList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ConversionList>,
       callback?: BodyResponseCallback<Schema$ConversionList>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ConversionList>,
       callback?: BodyResponseCallback<Schema$ConversionList>):
       void|AxiosPromise<Schema$ConversionList> {
@@ -715,14 +715,14 @@ export class Resource$Conversion {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ConversionList>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ConversionList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ConversionList>,
       callback?: BodyResponseCallback<Schema$ConversionList>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ConversionList>,
       callback?: BodyResponseCallback<Schema$ConversionList>):
       void|AxiosPromise<Schema$ConversionList> {
@@ -772,14 +772,14 @@ export class Resource$Conversion {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ConversionList>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ConversionList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ConversionList>,
       callback?: BodyResponseCallback<Schema$ConversionList>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ConversionList>,
       callback?: BodyResponseCallback<Schema$ConversionList>):
       void|AxiosPromise<Schema$ConversionList> {
@@ -827,15 +827,15 @@ export class Resource$Conversion {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  updateAvailability(params: any, options?: MethodOptions):
+  updateAvailability(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$UpdateAvailabilityResponse>;
   updateAvailability(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$UpdateAvailabilityResponse>,
       callback?: BodyResponseCallback<Schema$UpdateAvailabilityResponse>): void;
   updateAvailability(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$UpdateAvailabilityResponse>,
       callback?: BodyResponseCallback<Schema$UpdateAvailabilityResponse>):
@@ -896,12 +896,12 @@ export class Resource$Reports {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  generate(params: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
+  generate(params?: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
   generate(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Report>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>): void;
   generate(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>):
       void|AxiosPromise<Schema$Report> {
     if (typeof options === 'function') {
@@ -947,10 +947,10 @@ export class Resource$Reports {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Report>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>):
       void|AxiosPromise<Schema$Report> {
     if (typeof options === 'function') {
@@ -997,12 +997,12 @@ export class Resource$Reports {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getFile(params: any, options?: MethodOptions): AxiosPromise<void>;
+  getFile(params?: any, options?: MethodOptions): AxiosPromise<void>;
   getFile(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   getFile(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1049,12 +1049,12 @@ export class Resource$Reports {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  request(params: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
+  request(params?: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
   request(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Report>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>): void;
   request(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>):
       void|AxiosPromise<Schema$Report> {
     if (typeof options === 'function') {
@@ -1113,14 +1113,14 @@ export class Resource$Savedcolumns {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SavedColumnList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SavedColumnList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SavedColumnList>,
       callback?: BodyResponseCallback<Schema$SavedColumnList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SavedColumnList>,
       callback?: BodyResponseCallback<Schema$SavedColumnList>):
       void|AxiosPromise<Schema$SavedColumnList> {
diff --git a/src/apis/drive/v2.ts b/src/apis/drive/v2.ts
index cf3d2a1373..447b3aa96a 100644
--- a/src/apis/drive/v2.ts
+++ b/src/apis/drive/v2.ts
@@ -1588,10 +1588,10 @@ export class Resource$About {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$About>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$About>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$About>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$About>,
       callback?: BodyResponseCallback<Schema$About>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$About>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$About>,
       callback?: BodyResponseCallback<Schema$About>):
       void|AxiosPromise<Schema$About> {
     if (typeof options === 'function') {
@@ -1648,10 +1648,10 @@ export class Resource$Apps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$App>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$App>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$App>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$App>,
       callback?: BodyResponseCallback<Schema$App>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$App>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$App>,
       callback?: BodyResponseCallback<Schema$App>):
       void|AxiosPromise<Schema$App> {
     if (typeof options === 'function') {
@@ -1699,12 +1699,14 @@ export class Resource$Apps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$AppList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$AppList>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$AppList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AppList>,
       callback?: BodyResponseCallback<Schema$AppList>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$AppList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AppList>,
       callback?: BodyResponseCallback<Schema$AppList>):
       void|AxiosPromise<Schema$AppList> {
     if (typeof options === 'function') {
@@ -1764,10 +1766,10 @@ export class Resource$Changes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Change>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Change>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Change>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Change>,
       callback?: BodyResponseCallback<Schema$Change>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Change>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Change>,
       callback?: BodyResponseCallback<Schema$Change>):
       void|AxiosPromise<Schema$Change> {
     if (typeof options === 'function') {
@@ -1814,14 +1816,14 @@ export class Resource$Changes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getStartPageToken(params: any, options?: MethodOptions):
+  getStartPageToken(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$StartPageToken>;
   getStartPageToken(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$StartPageToken>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$StartPageToken>,
       callback?: BodyResponseCallback<Schema$StartPageToken>): void;
   getStartPageToken(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$StartPageToken>,
       callback?: BodyResponseCallback<Schema$StartPageToken>):
       void|AxiosPromise<Schema$StartPageToken> {
@@ -1877,13 +1879,13 @@ export class Resource$Changes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$ChangeList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$ChangeList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ChangeList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ChangeList>,
       callback?: BodyResponseCallback<Schema$ChangeList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ChangeList>,
       callback?: BodyResponseCallback<Schema$ChangeList>):
       void|AxiosPromise<Schema$ChangeList> {
@@ -1939,12 +1941,14 @@ export class Resource$Changes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  watch(params: any, options?: MethodOptions): AxiosPromise<Schema$Channel>;
+  watch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Channel>;
   watch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Channel>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
       callback?: BodyResponseCallback<Schema$Channel>): void;
   watch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
       callback?: BodyResponseCallback<Schema$Channel>):
       void|AxiosPromise<Schema$Channel> {
     if (typeof options === 'function') {
@@ -2002,12 +2006,12 @@ export class Resource$Channels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  stop(params: any, options?: MethodOptions): AxiosPromise<void>;
+  stop(params?: any, options?: MethodOptions): AxiosPromise<void>;
   stop(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   stop(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2065,12 +2069,12 @@ export class Resource$Children {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2116,12 +2120,12 @@ export class Resource$Children {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$ChildReference>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ChildReference>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ChildReference>,
       callback?: BodyResponseCallback<Schema$ChildReference>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ChildReference>,
       callback?: BodyResponseCallback<Schema$ChildReference>):
       void|AxiosPromise<Schema$ChildReference> {
@@ -2170,14 +2174,14 @@ export class Resource$Children {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ChildReference>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ChildReference>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ChildReference>,
       callback?: BodyResponseCallback<Schema$ChildReference>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ChildReference>,
       callback?: BodyResponseCallback<Schema$ChildReference>):
       void|AxiosPromise<Schema$ChildReference> {
@@ -2228,13 +2232,13 @@ export class Resource$Children {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$ChildList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$ChildList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ChildList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ChildList>,
       callback?: BodyResponseCallback<Schema$ChildList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ChildList>,
       callback?: BodyResponseCallback<Schema$ChildList>):
       void|AxiosPromise<Schema$ChildList> {
@@ -2294,12 +2298,12 @@ export class Resource$Comments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2346,10 +2350,12 @@ export class Resource$Comments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Comment>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Comment>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Comment>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
       callback?: BodyResponseCallback<Schema$Comment>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
       callback?: BodyResponseCallback<Schema$Comment>):
       void|AxiosPromise<Schema$Comment> {
     if (typeof options === 'function') {
@@ -2396,12 +2402,14 @@ export class Resource$Comments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Comment>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Comment>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Comment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
       callback?: BodyResponseCallback<Schema$Comment>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
       callback?: BodyResponseCallback<Schema$Comment>):
       void|AxiosPromise<Schema$Comment> {
     if (typeof options === 'function') {
@@ -2451,13 +2459,13 @@ export class Resource$Comments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$CommentList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$CommentList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CommentList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CommentList>,
       callback?: BodyResponseCallback<Schema$CommentList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CommentList>,
       callback?: BodyResponseCallback<Schema$CommentList>):
       void|AxiosPromise<Schema$CommentList> {
@@ -2506,12 +2514,14 @@ export class Resource$Comments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Comment>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Comment>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Comment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
       callback?: BodyResponseCallback<Schema$Comment>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
       callback?: BodyResponseCallback<Schema$Comment>):
       void|AxiosPromise<Schema$Comment> {
     if (typeof options === 'function') {
@@ -2559,12 +2569,14 @@ export class Resource$Comments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Comment>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Comment>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Comment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
       callback?: BodyResponseCallback<Schema$Comment>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
       callback?: BodyResponseCallback<Schema$Comment>):
       void|AxiosPromise<Schema$Comment> {
     if (typeof options === 'function') {
@@ -2631,12 +2643,12 @@ export class Resource$Files {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  copy(params: any, options?: MethodOptions): AxiosPromise<Schema$File>;
+  copy(params?: any, options?: MethodOptions): AxiosPromise<Schema$File>;
   copy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$File>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
       callback?: BodyResponseCallback<Schema$File>): void;
   copy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
       callback?: BodyResponseCallback<Schema$File>):
       void|AxiosPromise<Schema$File> {
     if (typeof options === 'function') {
@@ -2685,12 +2697,12 @@ export class Resource$Files {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2734,12 +2746,12 @@ export class Resource$Files {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  emptyTrash(params: any, options?: MethodOptions): AxiosPromise<void>;
+  emptyTrash(params?: any, options?: MethodOptions): AxiosPromise<void>;
   emptyTrash(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   emptyTrash(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2786,12 +2798,12 @@ export class Resource$Files {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  export(params: any, options?: MethodOptions): AxiosPromise<void>;
+  export(params?: any, options?: MethodOptions): AxiosPromise<void>;
   export(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   export(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2837,14 +2849,14 @@ export class Resource$Files {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  generateIds(params: any, options?: MethodOptions):
+  generateIds(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GeneratedIds>;
   generateIds(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GeneratedIds>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GeneratedIds>,
       callback?: BodyResponseCallback<Schema$GeneratedIds>): void;
   generateIds(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GeneratedIds>,
       callback?: BodyResponseCallback<Schema$GeneratedIds>):
       void|AxiosPromise<Schema$GeneratedIds> {
@@ -2896,10 +2908,10 @@ export class Resource$Files {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$File>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$File>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$File>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
       callback?: BodyResponseCallback<Schema$File>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
       callback?: BodyResponseCallback<Schema$File>):
       void|AxiosPromise<Schema$File> {
     if (typeof options === 'function') {
@@ -2957,12 +2969,12 @@ export class Resource$Files {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$File>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$File>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$File>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
       callback?: BodyResponseCallback<Schema$File>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
       callback?: BodyResponseCallback<Schema$File>):
       void|AxiosPromise<Schema$File> {
     if (typeof options === 'function') {
@@ -3019,12 +3031,13 @@ export class Resource$Files {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$FileList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$FileList>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$FileList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$FileList>,
       callback?: BodyResponseCallback<Schema$FileList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$FileList>,
       callback?: BodyResponseCallback<Schema$FileList>):
       void|AxiosPromise<Schema$FileList> {
@@ -3086,12 +3099,12 @@ export class Resource$Files {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$File>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$File>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$File>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
       callback?: BodyResponseCallback<Schema$File>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
       callback?: BodyResponseCallback<Schema$File>):
       void|AxiosPromise<Schema$File> {
     if (typeof options === 'function') {
@@ -3138,12 +3151,12 @@ export class Resource$Files {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  touch(params: any, options?: MethodOptions): AxiosPromise<Schema$File>;
+  touch(params?: any, options?: MethodOptions): AxiosPromise<Schema$File>;
   touch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$File>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
       callback?: BodyResponseCallback<Schema$File>): void;
   touch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
       callback?: BodyResponseCallback<Schema$File>):
       void|AxiosPromise<Schema$File> {
     if (typeof options === 'function') {
@@ -3191,12 +3204,12 @@ export class Resource$Files {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  trash(params: any, options?: MethodOptions): AxiosPromise<Schema$File>;
+  trash(params?: any, options?: MethodOptions): AxiosPromise<Schema$File>;
   trash(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$File>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
       callback?: BodyResponseCallback<Schema$File>): void;
   trash(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
       callback?: BodyResponseCallback<Schema$File>):
       void|AxiosPromise<Schema$File> {
     if (typeof options === 'function') {
@@ -3243,12 +3256,12 @@ export class Resource$Files {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  untrash(params: any, options?: MethodOptions): AxiosPromise<Schema$File>;
+  untrash(params?: any, options?: MethodOptions): AxiosPromise<Schema$File>;
   untrash(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$File>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
       callback?: BodyResponseCallback<Schema$File>): void;
   untrash(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
       callback?: BodyResponseCallback<Schema$File>):
       void|AxiosPromise<Schema$File> {
     if (typeof options === 'function') {
@@ -3312,12 +3325,12 @@ export class Resource$Files {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$File>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$File>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$File>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
       callback?: BodyResponseCallback<Schema$File>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
       callback?: BodyResponseCallback<Schema$File>):
       void|AxiosPromise<Schema$File> {
     if (typeof options === 'function') {
@@ -3371,12 +3384,14 @@ export class Resource$Files {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  watch(params: any, options?: MethodOptions): AxiosPromise<Schema$Channel>;
+  watch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Channel>;
   watch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Channel>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
       callback?: BodyResponseCallback<Schema$Channel>): void;
   watch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
       callback?: BodyResponseCallback<Schema$Channel>):
       void|AxiosPromise<Schema$Channel> {
     if (typeof options === 'function') {
@@ -3435,12 +3450,12 @@ export class Resource$Parents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -3486,12 +3501,12 @@ export class Resource$Parents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$ParentReference>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ParentReference>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ParentReference>,
       callback?: BodyResponseCallback<Schema$ParentReference>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ParentReference>,
       callback?: BodyResponseCallback<Schema$ParentReference>):
       void|AxiosPromise<Schema$ParentReference> {
@@ -3540,14 +3555,14 @@ export class Resource$Parents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ParentReference>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ParentReference>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ParentReference>,
       callback?: BodyResponseCallback<Schema$ParentReference>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ParentReference>,
       callback?: BodyResponseCallback<Schema$ParentReference>):
       void|AxiosPromise<Schema$ParentReference> {
@@ -3594,13 +3609,13 @@ export class Resource$Parents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$ParentList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$ParentList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ParentList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ParentList>,
       callback?: BodyResponseCallback<Schema$ParentList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ParentList>,
       callback?: BodyResponseCallback<Schema$ParentList>):
       void|AxiosPromise<Schema$ParentList> {
@@ -3662,12 +3677,12 @@ export class Resource$Permissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -3716,11 +3731,11 @@ export class Resource$Permissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Permission>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Permission>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Permission>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Permission>,
       callback?: BodyResponseCallback<Schema$Permission>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Permission>,
       callback?: BodyResponseCallback<Schema$Permission>):
       void|AxiosPromise<Schema$Permission> {
@@ -3768,14 +3783,14 @@ export class Resource$Permissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIdForEmail(params: any, options?: MethodOptions):
+  getIdForEmail(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PermissionId>;
   getIdForEmail(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PermissionId>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PermissionId>,
       callback?: BodyResponseCallback<Schema$PermissionId>): void;
   getIdForEmail(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PermissionId>,
       callback?: BodyResponseCallback<Schema$PermissionId>):
       void|AxiosPromise<Schema$PermissionId> {
@@ -3827,13 +3842,14 @@ export class Resource$Permissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Permission>;
+  insert(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Permission>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Permission>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Permission>,
       callback?: BodyResponseCallback<Schema$Permission>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Permission>,
       callback?: BodyResponseCallback<Schema$Permission>):
       void|AxiosPromise<Schema$Permission> {
@@ -3884,14 +3900,14 @@ export class Resource$Permissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PermissionList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PermissionList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PermissionList>,
       callback?: BodyResponseCallback<Schema$PermissionList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PermissionList>,
       callback?: BodyResponseCallback<Schema$PermissionList>):
       void|AxiosPromise<Schema$PermissionList> {
@@ -3944,13 +3960,13 @@ export class Resource$Permissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Permission>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Permission>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Permission>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Permission>,
       callback?: BodyResponseCallback<Schema$Permission>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Permission>,
       callback?: BodyResponseCallback<Schema$Permission>):
       void|AxiosPromise<Schema$Permission> {
@@ -4004,13 +4020,14 @@ export class Resource$Permissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Permission>;
+  update(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Permission>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Permission>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Permission>,
       callback?: BodyResponseCallback<Schema$Permission>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Permission>,
       callback?: BodyResponseCallback<Schema$Permission>):
       void|AxiosPromise<Schema$Permission> {
@@ -4072,12 +4089,12 @@ export class Resource$Properties {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -4124,10 +4141,11 @@ export class Resource$Properties {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Property>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Property>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Property>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Property>,
       callback?: BodyResponseCallback<Schema$Property>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Property>,
       callback?: BodyResponseCallback<Schema$Property>):
       void|AxiosPromise<Schema$Property> {
@@ -4175,12 +4193,13 @@ export class Resource$Properties {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Property>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Property>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Property>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Property>,
       callback?: BodyResponseCallback<Schema$Property>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Property>,
       callback?: BodyResponseCallback<Schema$Property>):
       void|AxiosPromise<Schema$Property> {
@@ -4227,13 +4246,14 @@ export class Resource$Properties {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$PropertyList>;
+  list(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$PropertyList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PropertyList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PropertyList>,
       callback?: BodyResponseCallback<Schema$PropertyList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PropertyList>,
       callback?: BodyResponseCallback<Schema$PropertyList>):
       void|AxiosPromise<Schema$PropertyList> {
@@ -4284,12 +4304,13 @@ export class Resource$Properties {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Property>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Property>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Property>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Property>,
       callback?: BodyResponseCallback<Schema$Property>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Property>,
       callback?: BodyResponseCallback<Schema$Property>):
       void|AxiosPromise<Schema$Property> {
@@ -4339,12 +4360,13 @@ export class Resource$Properties {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Property>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Property>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Property>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Property>,
       callback?: BodyResponseCallback<Schema$Property>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Property>,
       callback?: BodyResponseCallback<Schema$Property>):
       void|AxiosPromise<Schema$Property> {
@@ -4405,10 +4427,10 @@ export class Resource$Realtime {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<void>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<void>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<void>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<void>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -4458,12 +4480,12 @@ export class Resource$Realtime {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<void>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<void>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -4524,12 +4546,12 @@ export class Resource$Replies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -4579,11 +4601,11 @@ export class Resource$Replies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$CommentReply>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CommentReply>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$CommentReply>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CommentReply>,
       callback?: BodyResponseCallback<Schema$CommentReply>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CommentReply>,
       callback?: BodyResponseCallback<Schema$CommentReply>):
       void|AxiosPromise<Schema$CommentReply> {
@@ -4634,14 +4656,14 @@ export class Resource$Replies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CommentReply>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CommentReply>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CommentReply>,
       callback?: BodyResponseCallback<Schema$CommentReply>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CommentReply>,
       callback?: BodyResponseCallback<Schema$CommentReply>):
       void|AxiosPromise<Schema$CommentReply> {
@@ -4693,14 +4715,14 @@ export class Resource$Replies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CommentReplyList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CommentReplyList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CommentReplyList>,
       callback?: BodyResponseCallback<Schema$CommentReplyList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CommentReplyList>,
       callback?: BodyResponseCallback<Schema$CommentReplyList>):
       void|AxiosPromise<Schema$CommentReplyList> {
@@ -4751,14 +4773,14 @@ export class Resource$Replies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CommentReply>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CommentReply>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CommentReply>,
       callback?: BodyResponseCallback<Schema$CommentReply>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CommentReply>,
       callback?: BodyResponseCallback<Schema$CommentReply>):
       void|AxiosPromise<Schema$CommentReply> {
@@ -4810,14 +4832,14 @@ export class Resource$Replies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CommentReply>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CommentReply>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CommentReply>,
       callback?: BodyResponseCallback<Schema$CommentReply>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CommentReply>,
       callback?: BodyResponseCallback<Schema$CommentReply>):
       void|AxiosPromise<Schema$CommentReply> {
@@ -4879,12 +4901,12 @@ export class Resource$Revisions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -4930,10 +4952,11 @@ export class Resource$Revisions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Revision>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Revision>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Revision>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Revision>,
       callback?: BodyResponseCallback<Schema$Revision>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Revision>,
       callback?: BodyResponseCallback<Schema$Revision>):
       void|AxiosPromise<Schema$Revision> {
@@ -4982,13 +5005,14 @@ export class Resource$Revisions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$RevisionList>;
+  list(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$RevisionList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RevisionList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RevisionList>,
       callback?: BodyResponseCallback<Schema$RevisionList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RevisionList>,
       callback?: BodyResponseCallback<Schema$RevisionList>):
       void|AxiosPromise<Schema$RevisionList> {
@@ -5037,12 +5061,13 @@ export class Resource$Revisions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Revision>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Revision>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Revision>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Revision>,
       callback?: BodyResponseCallback<Schema$Revision>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Revision>,
       callback?: BodyResponseCallback<Schema$Revision>):
       void|AxiosPromise<Schema$Revision> {
@@ -5091,12 +5116,13 @@ export class Resource$Revisions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Revision>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Revision>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Revision>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Revision>,
       callback?: BodyResponseCallback<Schema$Revision>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Revision>,
       callback?: BodyResponseCallback<Schema$Revision>):
       void|AxiosPromise<Schema$Revision> {
@@ -5156,12 +5182,12 @@ export class Resource$Teamdrives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -5207,11 +5233,11 @@ export class Resource$Teamdrives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$TeamDrive>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TeamDrive>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$TeamDrive>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TeamDrive>,
       callback?: BodyResponseCallback<Schema$TeamDrive>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TeamDrive>,
       callback?: BodyResponseCallback<Schema$TeamDrive>):
       void|AxiosPromise<Schema$TeamDrive> {
@@ -5259,13 +5285,13 @@ export class Resource$Teamdrives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$TeamDrive>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$TeamDrive>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TeamDrive>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TeamDrive>,
       callback?: BodyResponseCallback<Schema$TeamDrive>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TeamDrive>,
       callback?: BodyResponseCallback<Schema$TeamDrive>):
       void|AxiosPromise<Schema$TeamDrive> {
@@ -5315,14 +5341,14 @@ export class Resource$Teamdrives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TeamDriveList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TeamDriveList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TeamDriveList>,
       callback?: BodyResponseCallback<Schema$TeamDriveList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TeamDriveList>,
       callback?: BodyResponseCallback<Schema$TeamDriveList>):
       void|AxiosPromise<Schema$TeamDriveList> {
@@ -5370,13 +5396,13 @@ export class Resource$Teamdrives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$TeamDrive>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$TeamDrive>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TeamDrive>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TeamDrive>,
       callback?: BodyResponseCallback<Schema$TeamDrive>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TeamDrive>,
       callback?: BodyResponseCallback<Schema$TeamDrive>):
       void|AxiosPromise<Schema$TeamDrive> {
diff --git a/src/apis/drive/v3.ts b/src/apis/drive/v3.ts
index 601be00a2c..ddd97ca19e 100644
--- a/src/apis/drive/v3.ts
+++ b/src/apis/drive/v3.ts
@@ -1026,10 +1026,10 @@ export class Resource$About {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$About>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$About>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$About>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$About>,
       callback?: BodyResponseCallback<Schema$About>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$About>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$About>,
       callback?: BodyResponseCallback<Schema$About>):
       void|AxiosPromise<Schema$About> {
     if (typeof options === 'function') {
@@ -1087,14 +1087,14 @@ export class Resource$Changes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getStartPageToken(params: any, options?: MethodOptions):
+  getStartPageToken(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$StartPageToken>;
   getStartPageToken(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$StartPageToken>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$StartPageToken>,
       callback?: BodyResponseCallback<Schema$StartPageToken>): void;
   getStartPageToken(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$StartPageToken>,
       callback?: BodyResponseCallback<Schema$StartPageToken>):
       void|AxiosPromise<Schema$StartPageToken> {
@@ -1149,13 +1149,13 @@ export class Resource$Changes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$ChangeList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$ChangeList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ChangeList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ChangeList>,
       callback?: BodyResponseCallback<Schema$ChangeList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ChangeList>,
       callback?: BodyResponseCallback<Schema$ChangeList>):
       void|AxiosPromise<Schema$ChangeList> {
@@ -1210,12 +1210,14 @@ export class Resource$Changes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  watch(params: any, options?: MethodOptions): AxiosPromise<Schema$Channel>;
+  watch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Channel>;
   watch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Channel>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
       callback?: BodyResponseCallback<Schema$Channel>): void;
   watch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
       callback?: BodyResponseCallback<Schema$Channel>):
       void|AxiosPromise<Schema$Channel> {
     if (typeof options === 'function') {
@@ -1273,12 +1275,12 @@ export class Resource$Channels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  stop(params: any, options?: MethodOptions): AxiosPromise<void>;
+  stop(params?: any, options?: MethodOptions): AxiosPromise<void>;
   stop(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   stop(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1336,12 +1338,14 @@ export class Resource$Comments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Comment>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Comment>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Comment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
       callback?: BodyResponseCallback<Schema$Comment>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
       callback?: BodyResponseCallback<Schema$Comment>):
       void|AxiosPromise<Schema$Comment> {
     if (typeof options === 'function') {
@@ -1388,12 +1392,12 @@ export class Resource$Comments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1440,10 +1444,12 @@ export class Resource$Comments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Comment>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Comment>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Comment>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
       callback?: BodyResponseCallback<Schema$Comment>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
       callback?: BodyResponseCallback<Schema$Comment>):
       void|AxiosPromise<Schema$Comment> {
     if (typeof options === 'function') {
@@ -1493,13 +1499,13 @@ export class Resource$Comments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$CommentList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$CommentList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CommentList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CommentList>,
       callback?: BodyResponseCallback<Schema$CommentList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CommentList>,
       callback?: BodyResponseCallback<Schema$CommentList>):
       void|AxiosPromise<Schema$CommentList> {
@@ -1548,12 +1554,14 @@ export class Resource$Comments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Comment>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Comment>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Comment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
       callback?: BodyResponseCallback<Schema$Comment>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
       callback?: BodyResponseCallback<Schema$Comment>):
       void|AxiosPromise<Schema$Comment> {
     if (typeof options === 'function') {
@@ -1617,12 +1625,12 @@ export class Resource$Files {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  copy(params: any, options?: MethodOptions): AxiosPromise<Schema$File>;
+  copy(params?: any, options?: MethodOptions): AxiosPromise<Schema$File>;
   copy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$File>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
       callback?: BodyResponseCallback<Schema$File>): void;
   copy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
       callback?: BodyResponseCallback<Schema$File>):
       void|AxiosPromise<Schema$File> {
     if (typeof options === 'function') {
@@ -1676,12 +1684,12 @@ export class Resource$Files {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$File>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$File>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$File>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
       callback?: BodyResponseCallback<Schema$File>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
       callback?: BodyResponseCallback<Schema$File>):
       void|AxiosPromise<Schema$File> {
     if (typeof options === 'function') {
@@ -1732,12 +1740,12 @@ export class Resource$Files {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1781,12 +1789,12 @@ export class Resource$Files {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  emptyTrash(params: any, options?: MethodOptions): AxiosPromise<void>;
+  emptyTrash(params?: any, options?: MethodOptions): AxiosPromise<void>;
   emptyTrash(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   emptyTrash(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1833,12 +1841,12 @@ export class Resource$Files {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  export(params: any, options?: MethodOptions): AxiosPromise<void>;
+  export(params?: any, options?: MethodOptions): AxiosPromise<void>;
   export(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   export(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1884,14 +1892,14 @@ export class Resource$Files {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  generateIds(params: any, options?: MethodOptions):
+  generateIds(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GeneratedIds>;
   generateIds(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GeneratedIds>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GeneratedIds>,
       callback?: BodyResponseCallback<Schema$GeneratedIds>): void;
   generateIds(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GeneratedIds>,
       callback?: BodyResponseCallback<Schema$GeneratedIds>):
       void|AxiosPromise<Schema$GeneratedIds> {
@@ -1940,10 +1948,10 @@ export class Resource$Files {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$File>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$File>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$File>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
       callback?: BodyResponseCallback<Schema$File>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
       callback?: BodyResponseCallback<Schema$File>):
       void|AxiosPromise<Schema$File> {
     if (typeof options === 'function') {
@@ -1998,12 +2006,13 @@ export class Resource$Files {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$FileList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$FileList>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$FileList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$FileList>,
       callback?: BodyResponseCallback<Schema$FileList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$FileList>,
       callback?: BodyResponseCallback<Schema$FileList>):
       void|AxiosPromise<Schema$FileList> {
@@ -2059,12 +2068,12 @@ export class Resource$Files {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$File>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$File>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$File>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
       callback?: BodyResponseCallback<Schema$File>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$File>,
       callback?: BodyResponseCallback<Schema$File>):
       void|AxiosPromise<Schema$File> {
     if (typeof options === 'function') {
@@ -2115,12 +2124,14 @@ export class Resource$Files {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  watch(params: any, options?: MethodOptions): AxiosPromise<Schema$Channel>;
+  watch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Channel>;
   watch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Channel>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
       callback?: BodyResponseCallback<Schema$Channel>): void;
   watch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
       callback?: BodyResponseCallback<Schema$Channel>):
       void|AxiosPromise<Schema$Channel> {
     if (typeof options === 'function') {
@@ -2184,13 +2195,14 @@ export class Resource$Permissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Permission>;
+  create(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Permission>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Permission>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Permission>,
       callback?: BodyResponseCallback<Schema$Permission>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Permission>,
       callback?: BodyResponseCallback<Schema$Permission>):
       void|AxiosPromise<Schema$Permission> {
@@ -2240,12 +2252,12 @@ export class Resource$Permissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2294,11 +2306,11 @@ export class Resource$Permissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Permission>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Permission>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Permission>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Permission>,
       callback?: BodyResponseCallback<Schema$Permission>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Permission>,
       callback?: BodyResponseCallback<Schema$Permission>):
       void|AxiosPromise<Schema$Permission> {
@@ -2350,14 +2362,14 @@ export class Resource$Permissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PermissionList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PermissionList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PermissionList>,
       callback?: BodyResponseCallback<Schema$PermissionList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PermissionList>,
       callback?: BodyResponseCallback<Schema$PermissionList>):
       void|AxiosPromise<Schema$PermissionList> {
@@ -2410,13 +2422,14 @@ export class Resource$Permissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Permission>;
+  update(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Permission>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Permission>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Permission>,
       callback?: BodyResponseCallback<Schema$Permission>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Permission>,
       callback?: BodyResponseCallback<Schema$Permission>):
       void|AxiosPromise<Schema$Permission> {
@@ -2478,12 +2491,12 @@ export class Resource$Replies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Reply>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Reply>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Reply>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Reply>,
       callback?: BodyResponseCallback<Schema$Reply>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Reply>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Reply>,
       callback?: BodyResponseCallback<Schema$Reply>):
       void|AxiosPromise<Schema$Reply> {
     if (typeof options === 'function') {
@@ -2532,12 +2545,12 @@ export class Resource$Replies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2587,10 +2600,10 @@ export class Resource$Replies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Reply>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Reply>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Reply>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Reply>,
       callback?: BodyResponseCallback<Schema$Reply>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Reply>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Reply>,
       callback?: BodyResponseCallback<Schema$Reply>):
       void|AxiosPromise<Schema$Reply> {
     if (typeof options === 'function') {
@@ -2642,13 +2655,13 @@ export class Resource$Replies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$ReplyList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$ReplyList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ReplyList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ReplyList>,
       callback?: BodyResponseCallback<Schema$ReplyList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ReplyList>,
       callback?: BodyResponseCallback<Schema$ReplyList>):
       void|AxiosPromise<Schema$ReplyList> {
@@ -2699,12 +2712,12 @@ export class Resource$Replies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Reply>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Reply>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Reply>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Reply>,
       callback?: BodyResponseCallback<Schema$Reply>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Reply>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Reply>,
       callback?: BodyResponseCallback<Schema$Reply>):
       void|AxiosPromise<Schema$Reply> {
     if (typeof options === 'function') {
@@ -2766,12 +2779,12 @@ export class Resource$Revisions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2818,10 +2831,11 @@ export class Resource$Revisions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Revision>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Revision>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Revision>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Revision>,
       callback?: BodyResponseCallback<Schema$Revision>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Revision>,
       callback?: BodyResponseCallback<Schema$Revision>):
       void|AxiosPromise<Schema$Revision> {
@@ -2870,13 +2884,14 @@ export class Resource$Revisions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$RevisionList>;
+  list(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$RevisionList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RevisionList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RevisionList>,
       callback?: BodyResponseCallback<Schema$RevisionList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RevisionList>,
       callback?: BodyResponseCallback<Schema$RevisionList>):
       void|AxiosPromise<Schema$RevisionList> {
@@ -2925,12 +2940,13 @@ export class Resource$Revisions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Revision>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Revision>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Revision>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Revision>,
       callback?: BodyResponseCallback<Schema$Revision>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Revision>,
       callback?: BodyResponseCallback<Schema$Revision>):
       void|AxiosPromise<Schema$Revision> {
@@ -2990,13 +3006,13 @@ export class Resource$Teamdrives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$TeamDrive>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$TeamDrive>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TeamDrive>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TeamDrive>,
       callback?: BodyResponseCallback<Schema$TeamDrive>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TeamDrive>,
       callback?: BodyResponseCallback<Schema$TeamDrive>):
       void|AxiosPromise<Schema$TeamDrive> {
@@ -3044,12 +3060,12 @@ export class Resource$Teamdrives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -3095,11 +3111,11 @@ export class Resource$Teamdrives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$TeamDrive>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TeamDrive>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$TeamDrive>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TeamDrive>,
       callback?: BodyResponseCallback<Schema$TeamDrive>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TeamDrive>,
       callback?: BodyResponseCallback<Schema$TeamDrive>):
       void|AxiosPromise<Schema$TeamDrive> {
@@ -3149,14 +3165,14 @@ export class Resource$Teamdrives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TeamDriveList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TeamDriveList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TeamDriveList>,
       callback?: BodyResponseCallback<Schema$TeamDriveList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TeamDriveList>,
       callback?: BodyResponseCallback<Schema$TeamDriveList>):
       void|AxiosPromise<Schema$TeamDriveList> {
@@ -3204,13 +3220,13 @@ export class Resource$Teamdrives {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$TeamDrive>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$TeamDrive>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TeamDrive>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TeamDrive>,
       callback?: BodyResponseCallback<Schema$TeamDrive>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TeamDrive>,
       callback?: BodyResponseCallback<Schema$TeamDrive>):
       void|AxiosPromise<Schema$TeamDrive> {
diff --git a/src/apis/firebasedynamiclinks/v1.ts b/src/apis/firebasedynamiclinks/v1.ts
index 0167c6e6a6..cabdfecccf 100644
--- a/src/apis/firebasedynamiclinks/v1.ts
+++ b/src/apis/firebasedynamiclinks/v1.ts
@@ -552,16 +552,16 @@ export class Resource$Shortlinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreateShortDynamicLinkResponse>;
   create(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$CreateShortDynamicLinkResponse>,
       callback?: BodyResponseCallback<Schema$CreateShortDynamicLinkResponse>):
       void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$CreateShortDynamicLinkResponse>,
       callback?: BodyResponseCallback<Schema$CreateShortDynamicLinkResponse>):
@@ -626,14 +626,14 @@ export class Resource$V1 {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getLinkStats(params: any, options?: MethodOptions):
+  getLinkStats(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DynamicLinkStats>;
   getLinkStats(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DynamicLinkStats>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DynamicLinkStats>,
       callback?: BodyResponseCallback<Schema$DynamicLinkStats>): void;
   getLinkStats(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DynamicLinkStats>,
       callback?: BodyResponseCallback<Schema$DynamicLinkStats>):
       void|AxiosPromise<Schema$DynamicLinkStats> {
@@ -681,17 +681,17 @@ export class Resource$V1 {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  installAttribution(params: any, options?: MethodOptions):
+  installAttribution(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GetIosPostInstallAttributionResponse>;
   installAttribution(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GetIosPostInstallAttributionResponse>,
       callback?:
           BodyResponseCallback<Schema$GetIosPostInstallAttributionResponse>):
       void;
   installAttribution(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GetIosPostInstallAttributionResponse>,
       callback?:
diff --git a/src/apis/firebaserules/v1.ts b/src/apis/firebaserules/v1.ts
index ed4ee77ed2..b7939092c1 100644
--- a/src/apis/firebaserules/v1.ts
+++ b/src/apis/firebaserules/v1.ts
@@ -478,14 +478,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  test(params: any, options?: MethodOptions):
+  test(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestRulesetResponse>;
   test(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TestRulesetResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TestRulesetResponse>,
       callback?: BodyResponseCallback<Schema$TestRulesetResponse>): void;
   test(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TestRulesetResponse>,
       callback?: BodyResponseCallback<Schema$TestRulesetResponse>):
       void|AxiosPromise<Schema$TestRulesetResponse> {
@@ -557,12 +557,14 @@ export class Resource$Projects$Releases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Release>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Release>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Release>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Release>,
       callback?: BodyResponseCallback<Schema$Release>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Release>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Release>,
       callback?: BodyResponseCallback<Schema$Release>):
       void|AxiosPromise<Schema$Release> {
     if (typeof options === 'function') {
@@ -608,12 +610,12 @@ export class Resource$Projects$Releases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -658,10 +660,12 @@ export class Resource$Projects$Releases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Release>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Release>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Release>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Release>,
       callback?: BodyResponseCallback<Schema$Release>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Release>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Release>,
       callback?: BodyResponseCallback<Schema$Release>):
       void|AxiosPromise<Schema$Release> {
     if (typeof options === 'function') {
@@ -707,16 +711,16 @@ export class Resource$Projects$Releases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getExecutable(params: any, options?: MethodOptions):
+  getExecutable(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GetReleaseExecutableResponse>;
   getExecutable(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GetReleaseExecutableResponse>,
       callback?: BodyResponseCallback<Schema$GetReleaseExecutableResponse>):
       void;
   getExecutable(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GetReleaseExecutableResponse>,
       callback?: BodyResponseCallback<Schema$GetReleaseExecutableResponse>):
@@ -770,14 +774,14 @@ export class Resource$Projects$Releases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListReleasesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListReleasesResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListReleasesResponse>,
       callback?: BodyResponseCallback<Schema$ListReleasesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListReleasesResponse>,
       callback?: BodyResponseCallback<Schema$ListReleasesResponse>):
       void|AxiosPromise<Schema$ListReleasesResponse> {
@@ -827,12 +831,14 @@ export class Resource$Projects$Releases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Release>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Release>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Release>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Release>,
       callback?: BodyResponseCallback<Schema$Release>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Release>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Release>,
       callback?: BodyResponseCallback<Schema$Release>):
       void|AxiosPromise<Schema$Release> {
     if (typeof options === 'function') {
@@ -894,12 +900,14 @@ export class Resource$Projects$Rulesets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Ruleset>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Ruleset>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Ruleset>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Ruleset>,
       callback?: BodyResponseCallback<Schema$Ruleset>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Ruleset>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Ruleset>,
       callback?: BodyResponseCallback<Schema$Ruleset>):
       void|AxiosPromise<Schema$Ruleset> {
     if (typeof options === 'function') {
@@ -946,12 +954,12 @@ export class Resource$Projects$Rulesets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -996,10 +1004,12 @@ export class Resource$Projects$Rulesets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Ruleset>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Ruleset>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Ruleset>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Ruleset>,
       callback?: BodyResponseCallback<Schema$Ruleset>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Ruleset>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Ruleset>,
       callback?: BodyResponseCallback<Schema$Ruleset>):
       void|AxiosPromise<Schema$Ruleset> {
     if (typeof options === 'function') {
@@ -1049,14 +1059,14 @@ export class Resource$Projects$Rulesets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListRulesetsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListRulesetsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListRulesetsResponse>,
       callback?: BodyResponseCallback<Schema$ListRulesetsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListRulesetsResponse>,
       callback?: BodyResponseCallback<Schema$ListRulesetsResponse>):
       void|AxiosPromise<Schema$ListRulesetsResponse> {
diff --git a/src/apis/firestore/v1beta1.ts b/src/apis/firestore/v1beta1.ts
index e7dd4293ee..3ff0250601 100644
--- a/src/apis/firestore/v1beta1.ts
+++ b/src/apis/firestore/v1beta1.ts
@@ -1197,15 +1197,15 @@ export class Resource$Projects$Databases$Documents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchGet(params: any, options?: MethodOptions):
+  batchGet(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BatchGetDocumentsResponse>;
   batchGet(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$BatchGetDocumentsResponse>,
       callback?: BodyResponseCallback<Schema$BatchGetDocumentsResponse>): void;
   batchGet(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$BatchGetDocumentsResponse>,
       callback?: BodyResponseCallback<Schema$BatchGetDocumentsResponse>):
@@ -1254,15 +1254,15 @@ export class Resource$Projects$Databases$Documents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  beginTransaction(params: any, options?: MethodOptions):
+  beginTransaction(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BeginTransactionResponse>;
   beginTransaction(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$BeginTransactionResponse>,
       callback?: BodyResponseCallback<Schema$BeginTransactionResponse>): void;
   beginTransaction(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$BeginTransactionResponse>,
       callback?: BodyResponseCallback<Schema$BeginTransactionResponse>):
@@ -1311,14 +1311,14 @@ export class Resource$Projects$Databases$Documents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  commit(params: any, options?: MethodOptions):
+  commit(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CommitResponse>;
   commit(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CommitResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CommitResponse>,
       callback?: BodyResponseCallback<Schema$CommitResponse>): void;
   commit(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CommitResponse>,
       callback?: BodyResponseCallback<Schema$CommitResponse>):
       void|AxiosPromise<Schema$CommitResponse> {
@@ -1369,13 +1369,14 @@ export class Resource$Projects$Databases$Documents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  createDocument(params: any, options?: MethodOptions):
+  createDocument(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Document>;
   createDocument(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Document>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Document>,
       callback?: BodyResponseCallback<Schema$Document>): void;
   createDocument(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Document>,
       callback?: BodyResponseCallback<Schema$Document>):
       void|AxiosPromise<Schema$Document> {
@@ -1424,12 +1425,12 @@ export class Resource$Projects$Databases$Documents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1477,10 +1478,11 @@ export class Resource$Projects$Databases$Documents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Document>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Document>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Document>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Document>,
       callback?: BodyResponseCallback<Schema$Document>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Document>,
       callback?: BodyResponseCallback<Schema$Document>):
       void|AxiosPromise<Schema$Document> {
@@ -1534,14 +1536,15 @@ export class Resource$Projects$Databases$Documents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListDocumentsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListDocumentsResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ListDocumentsResponse>,
       callback?: BodyResponseCallback<Schema$ListDocumentsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListDocumentsResponse>,
       callback?: BodyResponseCallback<Schema$ListDocumentsResponse>):
@@ -1590,15 +1593,15 @@ export class Resource$Projects$Databases$Documents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listCollectionIds(params: any, options?: MethodOptions):
+  listCollectionIds(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListCollectionIdsResponse>;
   listCollectionIds(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListCollectionIdsResponse>,
       callback?: BodyResponseCallback<Schema$ListCollectionIdsResponse>): void;
   listCollectionIds(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListCollectionIdsResponse>,
       callback?: BodyResponseCallback<Schema$ListCollectionIdsResponse>):
@@ -1647,14 +1650,14 @@ export class Resource$Projects$Databases$Documents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listen(params: any, options?: MethodOptions):
+  listen(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListenResponse>;
   listen(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListenResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListenResponse>,
       callback?: BodyResponseCallback<Schema$ListenResponse>): void;
   listen(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListenResponse>,
       callback?: BodyResponseCallback<Schema$ListenResponse>):
       void|AxiosPromise<Schema$ListenResponse> {
@@ -1706,12 +1709,13 @@ export class Resource$Projects$Databases$Documents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Document>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Document>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Document>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Document>,
       callback?: BodyResponseCallback<Schema$Document>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Document>,
       callback?: BodyResponseCallback<Schema$Document>):
       void|AxiosPromise<Schema$Document> {
@@ -1758,12 +1762,12 @@ export class Resource$Projects$Databases$Documents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  rollback(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  rollback(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   rollback(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   rollback(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1810,14 +1814,14 @@ export class Resource$Projects$Databases$Documents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  runQuery(params: any, options?: MethodOptions):
+  runQuery(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RunQueryResponse>;
   runQuery(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RunQueryResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RunQueryResponse>,
       callback?: BodyResponseCallback<Schema$RunQueryResponse>): void;
   runQuery(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RunQueryResponse>,
       callback?: BodyResponseCallback<Schema$RunQueryResponse>):
       void|AxiosPromise<Schema$RunQueryResponse> {
@@ -1865,14 +1869,14 @@ export class Resource$Projects$Databases$Documents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  write(params: any, options?: MethodOptions):
+  write(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$WriteResponse>;
   write(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$WriteResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$WriteResponse>,
       callback?: BodyResponseCallback<Schema$WriteResponse>): void;
   write(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$WriteResponse>,
       callback?: BodyResponseCallback<Schema$WriteResponse>):
       void|AxiosPromise<Schema$WriteResponse> {
@@ -1939,13 +1943,13 @@ export class Resource$Projects$Databases$Indexes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1992,12 +1996,12 @@ export class Resource$Projects$Databases$Indexes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2042,10 +2046,10 @@ export class Resource$Projects$Databases$Indexes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Index>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Index>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Index>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Index>,
       callback?: BodyResponseCallback<Schema$Index>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Index>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Index>,
       callback?: BodyResponseCallback<Schema$Index>):
       void|AxiosPromise<Schema$Index> {
     if (typeof options === 'function') {
@@ -2093,14 +2097,14 @@ export class Resource$Projects$Databases$Indexes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListIndexesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListIndexesResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListIndexesResponse>,
       callback?: BodyResponseCallback<Schema$ListIndexesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListIndexesResponse>,
       callback?: BodyResponseCallback<Schema$ListIndexesResponse>):
       void|AxiosPromise<Schema$ListIndexesResponse> {
diff --git a/src/apis/fitness/v1.ts b/src/apis/fitness/v1.ts
index ad04113b2c..2def9f0472 100644
--- a/src/apis/fitness/v1.ts
+++ b/src/apis/fitness/v1.ts
@@ -651,14 +651,14 @@ export class Resource$Users$Dataset {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  aggregate(params: any, options?: MethodOptions):
+  aggregate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AggregateResponse>;
   aggregate(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AggregateResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AggregateResponse>,
       callback?: BodyResponseCallback<Schema$AggregateResponse>): void;
   aggregate(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AggregateResponse>,
       callback?: BodyResponseCallback<Schema$AggregateResponse>):
       void|AxiosPromise<Schema$AggregateResponse> {
@@ -730,13 +730,14 @@ export class Resource$Users$Datasources {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$DataSource>;
+  create(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$DataSource>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DataSource>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DataSource>,
       callback?: BodyResponseCallback<Schema$DataSource>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DataSource>,
       callback?: BodyResponseCallback<Schema$DataSource>):
       void|AxiosPromise<Schema$DataSource> {
@@ -785,13 +786,14 @@ export class Resource$Users$Datasources {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$DataSource>;
+  delete(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$DataSource>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DataSource>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DataSource>,
       callback?: BodyResponseCallback<Schema$DataSource>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DataSource>,
       callback?: BodyResponseCallback<Schema$DataSource>):
       void|AxiosPromise<Schema$DataSource> {
@@ -840,11 +842,11 @@ export class Resource$Users$Datasources {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$DataSource>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DataSource>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$DataSource>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DataSource>,
       callback?: BodyResponseCallback<Schema$DataSource>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DataSource>,
       callback?: BodyResponseCallback<Schema$DataSource>):
       void|AxiosPromise<Schema$DataSource> {
@@ -896,15 +898,15 @@ export class Resource$Users$Datasources {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListDataSourcesResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListDataSourcesResponse>,
       callback?: BodyResponseCallback<Schema$ListDataSourcesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListDataSourcesResponse>,
       callback?: BodyResponseCallback<Schema$ListDataSourcesResponse>):
@@ -957,13 +959,13 @@ export class Resource$Users$Datasources {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$DataSource>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$DataSource>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DataSource>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DataSource>,
       callback?: BodyResponseCallback<Schema$DataSource>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DataSource>,
       callback?: BodyResponseCallback<Schema$DataSource>):
       void|AxiosPromise<Schema$DataSource> {
@@ -1015,13 +1017,14 @@ export class Resource$Users$Datasources {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$DataSource>;
+  update(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$DataSource>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DataSource>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DataSource>,
       callback?: BodyResponseCallback<Schema$DataSource>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DataSource>,
       callback?: BodyResponseCallback<Schema$DataSource>):
       void|AxiosPromise<Schema$DataSource> {
@@ -1083,16 +1086,16 @@ export class Resource$Users$Datasources$Datapointchanges {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListDataPointChangesResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListDataPointChangesResponse>,
       callback?: BodyResponseCallback<Schema$ListDataPointChangesResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListDataPointChangesResponse>,
       callback?: BodyResponseCallback<Schema$ListDataPointChangesResponse>):
@@ -1165,12 +1168,12 @@ export class Resource$Users$Datasources$Datasets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1225,10 +1228,12 @@ export class Resource$Users$Datasources$Datasets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Dataset>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Dataset>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Dataset>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Dataset>,
       callback?: BodyResponseCallback<Schema$Dataset>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Dataset>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Dataset>,
       callback?: BodyResponseCallback<Schema$Dataset>):
       void|AxiosPromise<Schema$Dataset> {
     if (typeof options === 'function') {
@@ -1283,12 +1288,14 @@ export class Resource$Users$Datasources$Datasets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Dataset>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Dataset>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Dataset>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Dataset>,
       callback?: BodyResponseCallback<Schema$Dataset>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Dataset>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Dataset>,
       callback?: BodyResponseCallback<Schema$Dataset>):
       void|AxiosPromise<Schema$Dataset> {
     if (typeof options === 'function') {
@@ -1351,12 +1358,12 @@ export class Resource$Users$Sessions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1405,14 +1412,14 @@ export class Resource$Users$Sessions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListSessionsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListSessionsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListSessionsResponse>,
       callback?: BodyResponseCallback<Schema$ListSessionsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListSessionsResponse>,
       callback?: BodyResponseCallback<Schema$ListSessionsResponse>):
       void|AxiosPromise<Schema$ListSessionsResponse> {
@@ -1462,12 +1469,14 @@ export class Resource$Users$Sessions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Session>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Session>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Session>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Session>,
       callback?: BodyResponseCallback<Schema$Session>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Session>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Session>,
       callback?: BodyResponseCallback<Schema$Session>):
       void|AxiosPromise<Schema$Session> {
     if (typeof options === 'function') {
diff --git a/src/apis/fusiontables/v1.ts b/src/apis/fusiontables/v1.ts
index 5fd744a497..a3f42820fe 100644
--- a/src/apis/fusiontables/v1.ts
+++ b/src/apis/fusiontables/v1.ts
@@ -616,12 +616,12 @@ export class Resource$Column {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -668,10 +668,10 @@ export class Resource$Column {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Column>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Column>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Column>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Column>,
       callback?: BodyResponseCallback<Schema$Column>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Column>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Column>,
       callback?: BodyResponseCallback<Schema$Column>):
       void|AxiosPromise<Schema$Column> {
     if (typeof options === 'function') {
@@ -719,12 +719,12 @@ export class Resource$Column {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Column>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Column>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Column>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Column>,
       callback?: BodyResponseCallback<Schema$Column>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Column>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Column>,
       callback?: BodyResponseCallback<Schema$Column>):
       void|AxiosPromise<Schema$Column> {
     if (typeof options === 'function') {
@@ -772,13 +772,13 @@ export class Resource$Column {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$ColumnList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$ColumnList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ColumnList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ColumnList>,
       callback?: BodyResponseCallback<Schema$ColumnList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ColumnList>,
       callback?: BodyResponseCallback<Schema$ColumnList>):
       void|AxiosPromise<Schema$ColumnList> {
@@ -828,12 +828,12 @@ export class Resource$Column {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Column>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Column>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Column>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Column>,
       callback?: BodyResponseCallback<Schema$Column>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Column>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Column>,
       callback?: BodyResponseCallback<Schema$Column>):
       void|AxiosPromise<Schema$Column> {
     if (typeof options === 'function') {
@@ -882,12 +882,12 @@ export class Resource$Column {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Column>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Column>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Column>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Column>,
       callback?: BodyResponseCallback<Schema$Column>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Column>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Column>,
       callback?: BodyResponseCallback<Schema$Column>):
       void|AxiosPromise<Schema$Column> {
     if (typeof options === 'function') {
@@ -949,11 +949,11 @@ export class Resource$Query {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  sql(params: any, options?: MethodOptions): AxiosPromise<Schema$Sqlresponse>;
-  sql(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Sqlresponse>,
+  sql(params?: any, options?: MethodOptions): AxiosPromise<Schema$Sqlresponse>;
+  sql(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Sqlresponse>,
       callback?: BodyResponseCallback<Schema$Sqlresponse>): void;
-  sql(params: any,
+  sql(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Sqlresponse>,
       callback?: BodyResponseCallback<Schema$Sqlresponse>):
       void|AxiosPromise<Schema$Sqlresponse> {
@@ -1002,14 +1002,14 @@ export class Resource$Query {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  sqlGet(params: any, options?: MethodOptions):
+  sqlGet(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Sqlresponse>;
   sqlGet(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Sqlresponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Sqlresponse>,
       callback?: BodyResponseCallback<Schema$Sqlresponse>): void;
   sqlGet(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Sqlresponse>,
       callback?: BodyResponseCallback<Schema$Sqlresponse>):
       void|AxiosPromise<Schema$Sqlresponse> {
@@ -1069,12 +1069,12 @@ export class Resource$Style {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1121,11 +1121,11 @@ export class Resource$Style {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$StyleSetting>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$StyleSetting>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$StyleSetting>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$StyleSetting>,
       callback?: BodyResponseCallback<Schema$StyleSetting>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$StyleSetting>,
       callback?: BodyResponseCallback<Schema$StyleSetting>):
       void|AxiosPromise<Schema$StyleSetting> {
@@ -1174,14 +1174,14 @@ export class Resource$Style {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$StyleSetting>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$StyleSetting>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$StyleSetting>,
       callback?: BodyResponseCallback<Schema$StyleSetting>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$StyleSetting>,
       callback?: BodyResponseCallback<Schema$StyleSetting>):
       void|AxiosPromise<Schema$StyleSetting> {
@@ -1230,14 +1230,14 @@ export class Resource$Style {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$StyleSettingList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$StyleSettingList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$StyleSettingList>,
       callback?: BodyResponseCallback<Schema$StyleSettingList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$StyleSettingList>,
       callback?: BodyResponseCallback<Schema$StyleSettingList>):
       void|AxiosPromise<Schema$StyleSettingList> {
@@ -1286,14 +1286,14 @@ export class Resource$Style {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$StyleSetting>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$StyleSetting>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$StyleSetting>,
       callback?: BodyResponseCallback<Schema$StyleSetting>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$StyleSetting>,
       callback?: BodyResponseCallback<Schema$StyleSetting>):
       void|AxiosPromise<Schema$StyleSetting> {
@@ -1343,14 +1343,14 @@ export class Resource$Style {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$StyleSetting>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$StyleSetting>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$StyleSetting>,
       callback?: BodyResponseCallback<Schema$StyleSetting>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$StyleSetting>,
       callback?: BodyResponseCallback<Schema$StyleSetting>):
       void|AxiosPromise<Schema$StyleSetting> {
@@ -1411,12 +1411,12 @@ export class Resource$Table {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  copy(params: any, options?: MethodOptions): AxiosPromise<Schema$Table>;
+  copy(params?: any, options?: MethodOptions): AxiosPromise<Schema$Table>;
   copy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Table>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
       callback?: BodyResponseCallback<Schema$Table>): void;
   copy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
       callback?: BodyResponseCallback<Schema$Table>):
       void|AxiosPromise<Schema$Table> {
     if (typeof options === 'function') {
@@ -1462,12 +1462,12 @@ export class Resource$Table {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1512,10 +1512,10 @@ export class Resource$Table {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Table>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Table>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Table>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
       callback?: BodyResponseCallback<Schema$Table>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
       callback?: BodyResponseCallback<Schema$Table>):
       void|AxiosPromise<Schema$Table> {
     if (typeof options === 'function') {
@@ -1569,12 +1569,13 @@ export class Resource$Table {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  importRows(params: any, options?: MethodOptions): AxiosPromise<Schema$Import>;
+  importRows(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Import>;
   importRows(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Import>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Import>,
       callback?: BodyResponseCallback<Schema$Import>): void;
   importRows(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Import>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Import>,
       callback?: BodyResponseCallback<Schema$Import>):
       void|AxiosPromise<Schema$Import> {
     if (typeof options === 'function') {
@@ -1627,12 +1628,13 @@ export class Resource$Table {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  importTable(params: any, options?: MethodOptions): AxiosPromise<Schema$Table>;
+  importTable(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Table>;
   importTable(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Table>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
       callback?: BodyResponseCallback<Schema$Table>): void;
   importTable(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
       callback?: BodyResponseCallback<Schema$Table>):
       void|AxiosPromise<Schema$Table> {
     if (typeof options === 'function') {
@@ -1680,12 +1682,12 @@ export class Resource$Table {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Table>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Table>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Table>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
       callback?: BodyResponseCallback<Schema$Table>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
       callback?: BodyResponseCallback<Schema$Table>):
       void|AxiosPromise<Schema$Table> {
     if (typeof options === 'function') {
@@ -1732,13 +1734,13 @@ export class Resource$Table {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$TableList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$TableList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TableList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TableList>,
       callback?: BodyResponseCallback<Schema$TableList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TableList>,
       callback?: BodyResponseCallback<Schema$TableList>):
       void|AxiosPromise<Schema$TableList> {
@@ -1789,12 +1791,12 @@ export class Resource$Table {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Table>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Table>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Table>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
       callback?: BodyResponseCallback<Schema$Table>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
       callback?: BodyResponseCallback<Schema$Table>):
       void|AxiosPromise<Schema$Table> {
     if (typeof options === 'function') {
@@ -1843,12 +1845,12 @@ export class Resource$Table {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Table>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Table>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Table>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
       callback?: BodyResponseCallback<Schema$Table>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
       callback?: BodyResponseCallback<Schema$Table>):
       void|AxiosPromise<Schema$Table> {
     if (typeof options === 'function') {
@@ -1907,12 +1909,12 @@ export class Resource$Task {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1958,10 +1960,10 @@ export class Resource$Task {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Task>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Task>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Task>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
       callback?: BodyResponseCallback<Schema$Task>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
       callback?: BodyResponseCallback<Schema$Task>):
       void|AxiosPromise<Schema$Task> {
     if (typeof options === 'function') {
@@ -2010,12 +2012,13 @@ export class Resource$Task {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$TaskList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$TaskList>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$TaskList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TaskList>,
       callback?: BodyResponseCallback<Schema$TaskList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TaskList>,
       callback?: BodyResponseCallback<Schema$TaskList>):
       void|AxiosPromise<Schema$TaskList> {
@@ -2075,12 +2078,12 @@ export class Resource$Template {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2127,10 +2130,11 @@ export class Resource$Template {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Template>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Template>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Template>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Template>,
       callback?: BodyResponseCallback<Schema$Template>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Template>,
       callback?: BodyResponseCallback<Schema$Template>):
       void|AxiosPromise<Schema$Template> {
@@ -2179,12 +2183,13 @@ export class Resource$Template {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Template>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Template>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Template>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Template>,
       callback?: BodyResponseCallback<Schema$Template>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Template>,
       callback?: BodyResponseCallback<Schema$Template>):
       void|AxiosPromise<Schema$Template> {
@@ -2233,13 +2238,14 @@ export class Resource$Template {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$TemplateList>;
+  list(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$TemplateList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TemplateList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TemplateList>,
       callback?: BodyResponseCallback<Schema$TemplateList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TemplateList>,
       callback?: BodyResponseCallback<Schema$TemplateList>):
       void|AxiosPromise<Schema$TemplateList> {
@@ -2288,12 +2294,13 @@ export class Resource$Template {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Template>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Template>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Template>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Template>,
       callback?: BodyResponseCallback<Schema$Template>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Template>,
       callback?: BodyResponseCallback<Schema$Template>):
       void|AxiosPromise<Schema$Template> {
@@ -2343,12 +2350,13 @@ export class Resource$Template {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Template>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Template>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Template>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Template>,
       callback?: BodyResponseCallback<Schema$Template>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Template>,
       callback?: BodyResponseCallback<Schema$Template>):
       void|AxiosPromise<Schema$Template> {
diff --git a/src/apis/fusiontables/v2.ts b/src/apis/fusiontables/v2.ts
index df69796de7..ceae6a37c1 100644
--- a/src/apis/fusiontables/v2.ts
+++ b/src/apis/fusiontables/v2.ts
@@ -671,12 +671,12 @@ export class Resource$Column {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -723,10 +723,10 @@ export class Resource$Column {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Column>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Column>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Column>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Column>,
       callback?: BodyResponseCallback<Schema$Column>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Column>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Column>,
       callback?: BodyResponseCallback<Schema$Column>):
       void|AxiosPromise<Schema$Column> {
     if (typeof options === 'function') {
@@ -774,12 +774,12 @@ export class Resource$Column {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Column>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Column>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Column>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Column>,
       callback?: BodyResponseCallback<Schema$Column>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Column>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Column>,
       callback?: BodyResponseCallback<Schema$Column>):
       void|AxiosPromise<Schema$Column> {
     if (typeof options === 'function') {
@@ -827,13 +827,13 @@ export class Resource$Column {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$ColumnList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$ColumnList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ColumnList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ColumnList>,
       callback?: BodyResponseCallback<Schema$ColumnList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ColumnList>,
       callback?: BodyResponseCallback<Schema$ColumnList>):
       void|AxiosPromise<Schema$ColumnList> {
@@ -883,12 +883,12 @@ export class Resource$Column {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Column>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Column>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Column>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Column>,
       callback?: BodyResponseCallback<Schema$Column>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Column>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Column>,
       callback?: BodyResponseCallback<Schema$Column>):
       void|AxiosPromise<Schema$Column> {
     if (typeof options === 'function') {
@@ -937,12 +937,12 @@ export class Resource$Column {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Column>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Column>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Column>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Column>,
       callback?: BodyResponseCallback<Schema$Column>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Column>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Column>,
       callback?: BodyResponseCallback<Schema$Column>):
       void|AxiosPromise<Schema$Column> {
     if (typeof options === 'function') {
@@ -1004,11 +1004,11 @@ export class Resource$Query {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  sql(params: any, options?: MethodOptions): AxiosPromise<Schema$Sqlresponse>;
-  sql(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Sqlresponse>,
+  sql(params?: any, options?: MethodOptions): AxiosPromise<Schema$Sqlresponse>;
+  sql(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Sqlresponse>,
       callback?: BodyResponseCallback<Schema$Sqlresponse>): void;
-  sql(params: any,
+  sql(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Sqlresponse>,
       callback?: BodyResponseCallback<Schema$Sqlresponse>):
       void|AxiosPromise<Schema$Sqlresponse> {
@@ -1058,14 +1058,14 @@ export class Resource$Query {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  sqlGet(params: any, options?: MethodOptions):
+  sqlGet(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Sqlresponse>;
   sqlGet(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Sqlresponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Sqlresponse>,
       callback?: BodyResponseCallback<Schema$Sqlresponse>): void;
   sqlGet(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Sqlresponse>,
       callback?: BodyResponseCallback<Schema$Sqlresponse>):
       void|AxiosPromise<Schema$Sqlresponse> {
@@ -1125,12 +1125,12 @@ export class Resource$Style {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1177,11 +1177,11 @@ export class Resource$Style {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$StyleSetting>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$StyleSetting>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$StyleSetting>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$StyleSetting>,
       callback?: BodyResponseCallback<Schema$StyleSetting>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$StyleSetting>,
       callback?: BodyResponseCallback<Schema$StyleSetting>):
       void|AxiosPromise<Schema$StyleSetting> {
@@ -1230,14 +1230,14 @@ export class Resource$Style {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$StyleSetting>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$StyleSetting>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$StyleSetting>,
       callback?: BodyResponseCallback<Schema$StyleSetting>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$StyleSetting>,
       callback?: BodyResponseCallback<Schema$StyleSetting>):
       void|AxiosPromise<Schema$StyleSetting> {
@@ -1286,14 +1286,14 @@ export class Resource$Style {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$StyleSettingList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$StyleSettingList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$StyleSettingList>,
       callback?: BodyResponseCallback<Schema$StyleSettingList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$StyleSettingList>,
       callback?: BodyResponseCallback<Schema$StyleSettingList>):
       void|AxiosPromise<Schema$StyleSettingList> {
@@ -1342,14 +1342,14 @@ export class Resource$Style {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$StyleSetting>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$StyleSetting>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$StyleSetting>,
       callback?: BodyResponseCallback<Schema$StyleSetting>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$StyleSetting>,
       callback?: BodyResponseCallback<Schema$StyleSetting>):
       void|AxiosPromise<Schema$StyleSetting> {
@@ -1399,14 +1399,14 @@ export class Resource$Style {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$StyleSetting>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$StyleSetting>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$StyleSetting>,
       callback?: BodyResponseCallback<Schema$StyleSetting>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$StyleSetting>,
       callback?: BodyResponseCallback<Schema$StyleSetting>):
       void|AxiosPromise<Schema$StyleSetting> {
@@ -1467,12 +1467,12 @@ export class Resource$Table {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  copy(params: any, options?: MethodOptions): AxiosPromise<Schema$Table>;
+  copy(params?: any, options?: MethodOptions): AxiosPromise<Schema$Table>;
   copy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Table>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
       callback?: BodyResponseCallback<Schema$Table>): void;
   copy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
       callback?: BodyResponseCallback<Schema$Table>):
       void|AxiosPromise<Schema$Table> {
     if (typeof options === 'function') {
@@ -1518,12 +1518,12 @@ export class Resource$Table {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1568,10 +1568,10 @@ export class Resource$Table {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Table>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Table>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Table>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
       callback?: BodyResponseCallback<Schema$Table>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
       callback?: BodyResponseCallback<Schema$Table>):
       void|AxiosPromise<Schema$Table> {
     if (typeof options === 'function') {
@@ -1625,12 +1625,13 @@ export class Resource$Table {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  importRows(params: any, options?: MethodOptions): AxiosPromise<Schema$Import>;
+  importRows(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Import>;
   importRows(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Import>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Import>,
       callback?: BodyResponseCallback<Schema$Import>): void;
   importRows(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Import>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Import>,
       callback?: BodyResponseCallback<Schema$Import>):
       void|AxiosPromise<Schema$Import> {
     if (typeof options === 'function') {
@@ -1683,12 +1684,13 @@ export class Resource$Table {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  importTable(params: any, options?: MethodOptions): AxiosPromise<Schema$Table>;
+  importTable(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Table>;
   importTable(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Table>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
       callback?: BodyResponseCallback<Schema$Table>): void;
   importTable(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
       callback?: BodyResponseCallback<Schema$Table>):
       void|AxiosPromise<Schema$Table> {
     if (typeof options === 'function') {
@@ -1736,12 +1738,12 @@ export class Resource$Table {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Table>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Table>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Table>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
       callback?: BodyResponseCallback<Schema$Table>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
       callback?: BodyResponseCallback<Schema$Table>):
       void|AxiosPromise<Schema$Table> {
     if (typeof options === 'function') {
@@ -1788,13 +1790,13 @@ export class Resource$Table {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$TableList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$TableList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TableList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TableList>,
       callback?: BodyResponseCallback<Schema$TableList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TableList>,
       callback?: BodyResponseCallback<Schema$TableList>):
       void|AxiosPromise<Schema$TableList> {
@@ -1845,12 +1847,12 @@ export class Resource$Table {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Table>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Table>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Table>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
       callback?: BodyResponseCallback<Schema$Table>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
       callback?: BodyResponseCallback<Schema$Table>):
       void|AxiosPromise<Schema$Table> {
     if (typeof options === 'function') {
@@ -1898,12 +1900,13 @@ export class Resource$Table {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  refetchSheet(params: any, options?: MethodOptions): AxiosPromise<Schema$Task>;
+  refetchSheet(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Task>;
   refetchSheet(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Task>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
       callback?: BodyResponseCallback<Schema$Task>): void;
   refetchSheet(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
       callback?: BodyResponseCallback<Schema$Task>):
       void|AxiosPromise<Schema$Task> {
     if (typeof options === 'function') {
@@ -1958,12 +1961,12 @@ export class Resource$Table {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  replaceRows(params: any, options?: MethodOptions): AxiosPromise<Schema$Task>;
+  replaceRows(params?: any, options?: MethodOptions): AxiosPromise<Schema$Task>;
   replaceRows(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Task>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
       callback?: BodyResponseCallback<Schema$Task>): void;
   replaceRows(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
       callback?: BodyResponseCallback<Schema$Task>):
       void|AxiosPromise<Schema$Task> {
     if (typeof options === 'function') {
@@ -2014,12 +2017,12 @@ export class Resource$Table {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Table>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Table>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Table>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
       callback?: BodyResponseCallback<Schema$Table>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Table>,
       callback?: BodyResponseCallback<Schema$Table>):
       void|AxiosPromise<Schema$Table> {
     if (typeof options === 'function') {
@@ -2079,12 +2082,12 @@ export class Resource$Task {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2130,10 +2133,10 @@ export class Resource$Task {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Task>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Task>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Task>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
       callback?: BodyResponseCallback<Schema$Task>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
       callback?: BodyResponseCallback<Schema$Task>):
       void|AxiosPromise<Schema$Task> {
     if (typeof options === 'function') {
@@ -2182,12 +2185,13 @@ export class Resource$Task {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$TaskList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$TaskList>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$TaskList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TaskList>,
       callback?: BodyResponseCallback<Schema$TaskList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TaskList>,
       callback?: BodyResponseCallback<Schema$TaskList>):
       void|AxiosPromise<Schema$TaskList> {
@@ -2247,12 +2251,12 @@ export class Resource$Template {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2299,10 +2303,11 @@ export class Resource$Template {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Template>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Template>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Template>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Template>,
       callback?: BodyResponseCallback<Schema$Template>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Template>,
       callback?: BodyResponseCallback<Schema$Template>):
       void|AxiosPromise<Schema$Template> {
@@ -2351,12 +2356,13 @@ export class Resource$Template {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Template>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Template>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Template>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Template>,
       callback?: BodyResponseCallback<Schema$Template>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Template>,
       callback?: BodyResponseCallback<Schema$Template>):
       void|AxiosPromise<Schema$Template> {
@@ -2405,13 +2411,14 @@ export class Resource$Template {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$TemplateList>;
+  list(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$TemplateList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TemplateList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TemplateList>,
       callback?: BodyResponseCallback<Schema$TemplateList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TemplateList>,
       callback?: BodyResponseCallback<Schema$TemplateList>):
       void|AxiosPromise<Schema$TemplateList> {
@@ -2460,12 +2467,13 @@ export class Resource$Template {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Template>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Template>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Template>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Template>,
       callback?: BodyResponseCallback<Schema$Template>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Template>,
       callback?: BodyResponseCallback<Schema$Template>):
       void|AxiosPromise<Schema$Template> {
@@ -2515,12 +2523,13 @@ export class Resource$Template {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Template>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Template>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Template>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Template>,
       callback?: BodyResponseCallback<Schema$Template>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Template>,
       callback?: BodyResponseCallback<Schema$Template>):
       void|AxiosPromise<Schema$Template> {
diff --git a/src/apis/games/v1.ts b/src/apis/games/v1.ts
index 7302fc65f2..3922bd2103 100644
--- a/src/apis/games/v1.ts
+++ b/src/apis/games/v1.ts
@@ -2927,17 +2927,17 @@ export class Resource$Achievementdefinitions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AchievementDefinitionsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AchievementDefinitionsListResponse>,
       callback?:
           BodyResponseCallback<Schema$AchievementDefinitionsListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AchievementDefinitionsListResponse>,
       callback?:
@@ -3003,16 +3003,16 @@ export class Resource$Achievements {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  increment(params: any, options?: MethodOptions):
+  increment(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AchievementIncrementResponse>;
   increment(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AchievementIncrementResponse>,
       callback?: BodyResponseCallback<Schema$AchievementIncrementResponse>):
       void;
   increment(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AchievementIncrementResponse>,
       callback?: BodyResponseCallback<Schema$AchievementIncrementResponse>):
@@ -3066,16 +3066,16 @@ export class Resource$Achievements {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PlayerAchievementListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$PlayerAchievementListResponse>,
       callback?: BodyResponseCallback<Schema$PlayerAchievementListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$PlayerAchievementListResponse>,
       callback?: BodyResponseCallback<Schema$PlayerAchievementListResponse>):
@@ -3125,15 +3125,15 @@ export class Resource$Achievements {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  reveal(params: any, options?: MethodOptions):
+  reveal(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AchievementRevealResponse>;
   reveal(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AchievementRevealResponse>,
       callback?: BodyResponseCallback<Schema$AchievementRevealResponse>): void;
   reveal(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AchievementRevealResponse>,
       callback?: BodyResponseCallback<Schema$AchievementRevealResponse>):
@@ -3185,17 +3185,17 @@ export class Resource$Achievements {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setStepsAtLeast(params: any, options?: MethodOptions):
+  setStepsAtLeast(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AchievementSetStepsAtLeastResponse>;
   setStepsAtLeast(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AchievementSetStepsAtLeastResponse>,
       callback?:
           BodyResponseCallback<Schema$AchievementSetStepsAtLeastResponse>):
       void;
   setStepsAtLeast(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AchievementSetStepsAtLeastResponse>,
       callback?:
@@ -3247,15 +3247,15 @@ export class Resource$Achievements {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  unlock(params: any, options?: MethodOptions):
+  unlock(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AchievementUnlockResponse>;
   unlock(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AchievementUnlockResponse>,
       callback?: BodyResponseCallback<Schema$AchievementUnlockResponse>): void;
   unlock(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AchievementUnlockResponse>,
       callback?: BodyResponseCallback<Schema$AchievementUnlockResponse>):
@@ -3303,16 +3303,16 @@ export class Resource$Achievements {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  updateMultiple(params: any, options?: MethodOptions):
+  updateMultiple(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AchievementUpdateMultipleResponse>;
   updateMultiple(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AchievementUpdateMultipleResponse>,
       callback?:
           BodyResponseCallback<Schema$AchievementUpdateMultipleResponse>): void;
   updateMultiple(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AchievementUpdateMultipleResponse>,
       callback?:
@@ -3379,11 +3379,11 @@ export class Resource$Applications {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Application>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Application>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Application>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Application>,
       callback?: BodyResponseCallback<Schema$Application>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Application>,
       callback?: BodyResponseCallback<Schema$Application>):
       void|AxiosPromise<Schema$Application> {
@@ -3430,12 +3430,12 @@ export class Resource$Applications {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  played(params: any, options?: MethodOptions): AxiosPromise<void>;
+  played(params?: any, options?: MethodOptions): AxiosPromise<void>;
   played(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   played(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -3482,15 +3482,15 @@ export class Resource$Applications {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  verify(params: any, options?: MethodOptions):
+  verify(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ApplicationVerifyResponse>;
   verify(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ApplicationVerifyResponse>,
       callback?: BodyResponseCallback<Schema$ApplicationVerifyResponse>): void;
   verify(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ApplicationVerifyResponse>,
       callback?: BodyResponseCallback<Schema$ApplicationVerifyResponse>):
@@ -3553,15 +3553,15 @@ export class Resource$Events {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listByPlayer(params: any, options?: MethodOptions):
+  listByPlayer(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PlayerEventListResponse>;
   listByPlayer(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$PlayerEventListResponse>,
       callback?: BodyResponseCallback<Schema$PlayerEventListResponse>): void;
   listByPlayer(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$PlayerEventListResponse>,
       callback?: BodyResponseCallback<Schema$PlayerEventListResponse>):
@@ -3610,16 +3610,16 @@ export class Resource$Events {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listDefinitions(params: any, options?: MethodOptions):
+  listDefinitions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$EventDefinitionListResponse>;
   listDefinitions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$EventDefinitionListResponse>,
       callback?: BodyResponseCallback<Schema$EventDefinitionListResponse>):
       void;
   listDefinitions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$EventDefinitionListResponse>,
       callback?: BodyResponseCallback<Schema$EventDefinitionListResponse>):
@@ -3670,14 +3670,14 @@ export class Resource$Events {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  record(params: any, options?: MethodOptions):
+  record(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$EventUpdateResponse>;
   record(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$EventUpdateResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$EventUpdateResponse>,
       callback?: BodyResponseCallback<Schema$EventUpdateResponse>): void;
   record(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$EventUpdateResponse>,
       callback?: BodyResponseCallback<Schema$EventUpdateResponse>):
       void|AxiosPromise<Schema$EventUpdateResponse> {
@@ -3736,11 +3736,11 @@ export class Resource$Leaderboards {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Leaderboard>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Leaderboard>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Leaderboard>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Leaderboard>,
       callback?: BodyResponseCallback<Schema$Leaderboard>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Leaderboard>,
       callback?: BodyResponseCallback<Schema$Leaderboard>):
       void|AxiosPromise<Schema$Leaderboard> {
@@ -3789,15 +3789,15 @@ export class Resource$Leaderboards {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LeaderboardListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$LeaderboardListResponse>,
       callback?: BodyResponseCallback<Schema$LeaderboardListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$LeaderboardListResponse>,
       callback?: BodyResponseCallback<Schema$LeaderboardListResponse>):
@@ -3856,14 +3856,14 @@ export class Resource$Metagame {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getMetagameConfig(params: any, options?: MethodOptions):
+  getMetagameConfig(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$MetagameConfig>;
   getMetagameConfig(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$MetagameConfig>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$MetagameConfig>,
       callback?: BodyResponseCallback<Schema$MetagameConfig>): void;
   getMetagameConfig(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$MetagameConfig>,
       callback?: BodyResponseCallback<Schema$MetagameConfig>):
       void|AxiosPromise<Schema$MetagameConfig> {
@@ -3915,14 +3915,14 @@ export class Resource$Metagame {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listCategoriesByPlayer(params: any, options?: MethodOptions):
+  listCategoriesByPlayer(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CategoryListResponse>;
   listCategoriesByPlayer(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CategoryListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CategoryListResponse>,
       callback?: BodyResponseCallback<Schema$CategoryListResponse>): void;
   listCategoriesByPlayer(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CategoryListResponse>,
       callback?: BodyResponseCallback<Schema$CategoryListResponse>):
       void|AxiosPromise<Schema$CategoryListResponse> {
@@ -3984,10 +3984,10 @@ export class Resource$Players {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Player>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Player>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Player>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Player>,
       callback?: BodyResponseCallback<Schema$Player>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Player>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Player>,
       callback?: BodyResponseCallback<Schema$Player>):
       void|AxiosPromise<Schema$Player> {
     if (typeof options === 'function') {
@@ -4036,14 +4036,14 @@ export class Resource$Players {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PlayerListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PlayerListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PlayerListResponse>,
       callback?: BodyResponseCallback<Schema$PlayerListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PlayerListResponse>,
       callback?: BodyResponseCallback<Schema$PlayerListResponse>):
       void|AxiosPromise<Schema$PlayerListResponse> {
@@ -4103,12 +4103,12 @@ export class Resource$Pushtokens {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  remove(params: any, options?: MethodOptions): AxiosPromise<void>;
+  remove(params?: any, options?: MethodOptions): AxiosPromise<void>;
   remove(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   remove(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -4153,12 +4153,12 @@ export class Resource$Pushtokens {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<void>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<void>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -4219,12 +4219,12 @@ export class Resource$Questmilestones {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  claim(params: any, options?: MethodOptions): AxiosPromise<void>;
+  claim(params?: any, options?: MethodOptions): AxiosPromise<void>;
   claim(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   claim(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -4284,12 +4284,12 @@ export class Resource$Quests {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  accept(params: any, options?: MethodOptions): AxiosPromise<Schema$Quest>;
+  accept(params?: any, options?: MethodOptions): AxiosPromise<Schema$Quest>;
   accept(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Quest>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Quest>,
       callback?: BodyResponseCallback<Schema$Quest>): void;
   accept(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Quest>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Quest>,
       callback?: BodyResponseCallback<Schema$Quest>):
       void|AxiosPromise<Schema$Quest> {
     if (typeof options === 'function') {
@@ -4339,14 +4339,14 @@ export class Resource$Quests {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$QuestListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$QuestListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$QuestListResponse>,
       callback?: BodyResponseCallback<Schema$QuestListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$QuestListResponse>,
       callback?: BodyResponseCallback<Schema$QuestListResponse>):
       void|AxiosPromise<Schema$QuestListResponse> {
@@ -4405,14 +4405,15 @@ export class Resource$Revisions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  check(params: any, options?: MethodOptions):
+  check(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RevisionCheckResponse>;
   check(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RevisionCheckResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$RevisionCheckResponse>,
       callback?: BodyResponseCallback<Schema$RevisionCheckResponse>): void;
   check(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$RevisionCheckResponse>,
       callback?: BodyResponseCallback<Schema$RevisionCheckResponse>):
@@ -4474,12 +4475,12 @@ export class Resource$Rooms {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Room>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Room>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Room>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Room>,
       callback?: BodyResponseCallback<Schema$Room>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Room>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Room>,
       callback?: BodyResponseCallback<Schema$Room>):
       void|AxiosPromise<Schema$Room> {
     if (typeof options === 'function') {
@@ -4527,12 +4528,12 @@ export class Resource$Rooms {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  decline(params: any, options?: MethodOptions): AxiosPromise<Schema$Room>;
+  decline(params?: any, options?: MethodOptions): AxiosPromise<Schema$Room>;
   decline(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Room>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Room>,
       callback?: BodyResponseCallback<Schema$Room>): void;
   decline(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Room>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Room>,
       callback?: BodyResponseCallback<Schema$Room>):
       void|AxiosPromise<Schema$Room> {
     if (typeof options === 'function') {
@@ -4579,12 +4580,12 @@ export class Resource$Rooms {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  dismiss(params: any, options?: MethodOptions): AxiosPromise<void>;
+  dismiss(params?: any, options?: MethodOptions): AxiosPromise<void>;
   dismiss(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   dismiss(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -4630,10 +4631,10 @@ export class Resource$Rooms {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Room>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Room>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Room>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Room>,
       callback?: BodyResponseCallback<Schema$Room>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Room>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Room>,
       callback?: BodyResponseCallback<Schema$Room>):
       void|AxiosPromise<Schema$Room> {
     if (typeof options === 'function') {
@@ -4682,12 +4683,12 @@ export class Resource$Rooms {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  join(params: any, options?: MethodOptions): AxiosPromise<Schema$Room>;
+  join(params?: any, options?: MethodOptions): AxiosPromise<Schema$Room>;
   join(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Room>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Room>,
       callback?: BodyResponseCallback<Schema$Room>): void;
   join(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Room>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Room>,
       callback?: BodyResponseCallback<Schema$Room>):
       void|AxiosPromise<Schema$Room> {
     if (typeof options === 'function') {
@@ -4736,12 +4737,12 @@ export class Resource$Rooms {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  leave(params: any, options?: MethodOptions): AxiosPromise<Schema$Room>;
+  leave(params?: any, options?: MethodOptions): AxiosPromise<Schema$Room>;
   leave(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Room>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Room>,
       callback?: BodyResponseCallback<Schema$Room>): void;
   leave(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Room>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Room>,
       callback?: BodyResponseCallback<Schema$Room>):
       void|AxiosPromise<Schema$Room> {
     if (typeof options === 'function') {
@@ -4789,12 +4790,13 @@ export class Resource$Rooms {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$RoomList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$RoomList>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$RoomList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RoomList>,
       callback?: BodyResponseCallback<Schema$RoomList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RoomList>,
       callback?: BodyResponseCallback<Schema$RoomList>):
       void|AxiosPromise<Schema$RoomList> {
@@ -4844,14 +4846,14 @@ export class Resource$Rooms {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  reportStatus(params: any, options?: MethodOptions):
+  reportStatus(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RoomStatus>;
   reportStatus(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RoomStatus>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RoomStatus>,
       callback?: BodyResponseCallback<Schema$RoomStatus>): void;
   reportStatus(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RoomStatus>,
       callback?: BodyResponseCallback<Schema$RoomStatus>):
       void|AxiosPromise<Schema$RoomStatus> {
@@ -4920,15 +4922,15 @@ export class Resource$Scores {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions):
+  get(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PlayerLeaderboardScoreListResponse>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$PlayerLeaderboardScoreListResponse>,
       callback?:
           BodyResponseCallback<Schema$PlayerLeaderboardScoreListResponse>):
       void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$PlayerLeaderboardScoreListResponse>,
       callback?:
@@ -4986,14 +4988,14 @@ export class Resource$Scores {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LeaderboardScores>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LeaderboardScores>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LeaderboardScores>,
       callback?: BodyResponseCallback<Schema$LeaderboardScores>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LeaderboardScores>,
       callback?: BodyResponseCallback<Schema$LeaderboardScores>):
       void|AxiosPromise<Schema$LeaderboardScores> {
@@ -5049,14 +5051,14 @@ export class Resource$Scores {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listWindow(params: any, options?: MethodOptions):
+  listWindow(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LeaderboardScores>;
   listWindow(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LeaderboardScores>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LeaderboardScores>,
       callback?: BodyResponseCallback<Schema$LeaderboardScores>): void;
   listWindow(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LeaderboardScores>,
       callback?: BodyResponseCallback<Schema$LeaderboardScores>):
       void|AxiosPromise<Schema$LeaderboardScores> {
@@ -5107,14 +5109,14 @@ export class Resource$Scores {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  submit(params: any, options?: MethodOptions):
+  submit(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PlayerScoreResponse>;
   submit(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PlayerScoreResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PlayerScoreResponse>,
       callback?: BodyResponseCallback<Schema$PlayerScoreResponse>): void;
   submit(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PlayerScoreResponse>,
       callback?: BodyResponseCallback<Schema$PlayerScoreResponse>):
       void|AxiosPromise<Schema$PlayerScoreResponse> {
@@ -5162,15 +5164,15 @@ export class Resource$Scores {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  submitMultiple(params: any, options?: MethodOptions):
+  submitMultiple(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PlayerScoreListResponse>;
   submitMultiple(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$PlayerScoreListResponse>,
       callback?: BodyResponseCallback<Schema$PlayerScoreListResponse>): void;
   submitMultiple(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$PlayerScoreListResponse>,
       callback?: BodyResponseCallback<Schema$PlayerScoreListResponse>):
@@ -5231,10 +5233,11 @@ export class Resource$Snapshots {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Snapshot>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Snapshot>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Snapshot>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Snapshot>,
       callback?: BodyResponseCallback<Schema$Snapshot>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Snapshot>,
       callback?: BodyResponseCallback<Schema$Snapshot>):
       void|AxiosPromise<Schema$Snapshot> {
@@ -5285,14 +5288,14 @@ export class Resource$Snapshots {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SnapshotListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SnapshotListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SnapshotListResponse>,
       callback?: BodyResponseCallback<Schema$SnapshotListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SnapshotListResponse>,
       callback?: BodyResponseCallback<Schema$SnapshotListResponse>):
       void|AxiosPromise<Schema$SnapshotListResponse> {
@@ -5351,12 +5354,12 @@ export class Resource$Turnbasedmatches {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancel(params: any, options?: MethodOptions): AxiosPromise<void>;
+  cancel(params?: any, options?: MethodOptions): AxiosPromise<void>;
   cancel(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   cancel(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -5402,14 +5405,14 @@ export class Resource$Turnbasedmatches {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TurnBasedMatch>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TurnBasedMatch>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TurnBasedMatch>,
       callback?: BodyResponseCallback<Schema$TurnBasedMatch>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TurnBasedMatch>,
       callback?: BodyResponseCallback<Schema$TurnBasedMatch>):
       void|AxiosPromise<Schema$TurnBasedMatch> {
@@ -5457,14 +5460,14 @@ export class Resource$Turnbasedmatches {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  decline(params: any, options?: MethodOptions):
+  decline(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TurnBasedMatch>;
   decline(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TurnBasedMatch>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TurnBasedMatch>,
       callback?: BodyResponseCallback<Schema$TurnBasedMatch>): void;
   decline(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TurnBasedMatch>,
       callback?: BodyResponseCallback<Schema$TurnBasedMatch>):
       void|AxiosPromise<Schema$TurnBasedMatch> {
@@ -5512,12 +5515,12 @@ export class Resource$Turnbasedmatches {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  dismiss(params: any, options?: MethodOptions): AxiosPromise<void>;
+  dismiss(params?: any, options?: MethodOptions): AxiosPromise<void>;
   dismiss(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   dismiss(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -5566,14 +5569,14 @@ export class Resource$Turnbasedmatches {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  finish(params: any, options?: MethodOptions):
+  finish(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TurnBasedMatch>;
   finish(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TurnBasedMatch>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TurnBasedMatch>,
       callback?: BodyResponseCallback<Schema$TurnBasedMatch>): void;
   finish(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TurnBasedMatch>,
       callback?: BodyResponseCallback<Schema$TurnBasedMatch>):
       void|AxiosPromise<Schema$TurnBasedMatch> {
@@ -5622,12 +5625,12 @@ export class Resource$Turnbasedmatches {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$TurnBasedMatch>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TurnBasedMatch>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TurnBasedMatch>,
       callback?: BodyResponseCallback<Schema$TurnBasedMatch>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TurnBasedMatch>,
       callback?: BodyResponseCallback<Schema$TurnBasedMatch>):
       void|AxiosPromise<Schema$TurnBasedMatch> {
@@ -5675,14 +5678,14 @@ export class Resource$Turnbasedmatches {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  join(params: any, options?: MethodOptions):
+  join(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TurnBasedMatch>;
   join(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TurnBasedMatch>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TurnBasedMatch>,
       callback?: BodyResponseCallback<Schema$TurnBasedMatch>): void;
   join(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TurnBasedMatch>,
       callback?: BodyResponseCallback<Schema$TurnBasedMatch>):
       void|AxiosPromise<Schema$TurnBasedMatch> {
@@ -5731,14 +5734,14 @@ export class Resource$Turnbasedmatches {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  leave(params: any, options?: MethodOptions):
+  leave(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TurnBasedMatch>;
   leave(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TurnBasedMatch>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TurnBasedMatch>,
       callback?: BodyResponseCallback<Schema$TurnBasedMatch>): void;
   leave(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TurnBasedMatch>,
       callback?: BodyResponseCallback<Schema$TurnBasedMatch>):
       void|AxiosPromise<Schema$TurnBasedMatch> {
@@ -5789,14 +5792,14 @@ export class Resource$Turnbasedmatches {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  leaveTurn(params: any, options?: MethodOptions):
+  leaveTurn(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TurnBasedMatch>;
   leaveTurn(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TurnBasedMatch>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TurnBasedMatch>,
       callback?: BodyResponseCallback<Schema$TurnBasedMatch>): void;
   leaveTurn(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TurnBasedMatch>,
       callback?: BodyResponseCallback<Schema$TurnBasedMatch>):
       void|AxiosPromise<Schema$TurnBasedMatch> {
@@ -5847,14 +5850,14 @@ export class Resource$Turnbasedmatches {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TurnBasedMatchList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TurnBasedMatchList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TurnBasedMatchList>,
       callback?: BodyResponseCallback<Schema$TurnBasedMatchList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TurnBasedMatchList>,
       callback?: BodyResponseCallback<Schema$TurnBasedMatchList>):
       void|AxiosPromise<Schema$TurnBasedMatchList> {
@@ -5906,14 +5909,15 @@ export class Resource$Turnbasedmatches {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  rematch(params: any, options?: MethodOptions):
+  rematch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TurnBasedMatchRematch>;
   rematch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TurnBasedMatchRematch>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$TurnBasedMatchRematch>,
       callback?: BodyResponseCallback<Schema$TurnBasedMatchRematch>): void;
   rematch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TurnBasedMatchRematch>,
       callback?: BodyResponseCallback<Schema$TurnBasedMatchRematch>):
@@ -5968,14 +5972,14 @@ export class Resource$Turnbasedmatches {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  sync(params: any, options?: MethodOptions):
+  sync(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TurnBasedMatchSync>;
   sync(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TurnBasedMatchSync>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TurnBasedMatchSync>,
       callback?: BodyResponseCallback<Schema$TurnBasedMatchSync>): void;
   sync(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TurnBasedMatchSync>,
       callback?: BodyResponseCallback<Schema$TurnBasedMatchSync>):
       void|AxiosPromise<Schema$TurnBasedMatchSync> {
@@ -6024,14 +6028,14 @@ export class Resource$Turnbasedmatches {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  takeTurn(params: any, options?: MethodOptions):
+  takeTurn(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TurnBasedMatch>;
   takeTurn(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TurnBasedMatch>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TurnBasedMatch>,
       callback?: BodyResponseCallback<Schema$TurnBasedMatch>): void;
   takeTurn(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TurnBasedMatch>,
       callback?: BodyResponseCallback<Schema$TurnBasedMatch>):
       void|AxiosPromise<Schema$TurnBasedMatch> {
diff --git a/src/apis/gamesConfiguration/v1configuration.ts b/src/apis/gamesConfiguration/v1configuration.ts
index 76e47f5cbe..469ef9ecdb 100644
--- a/src/apis/gamesConfiguration/v1configuration.ts
+++ b/src/apis/gamesConfiguration/v1configuration.ts
@@ -386,12 +386,12 @@ export class Resource$Achievementconfigurations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -438,13 +438,13 @@ export class Resource$Achievementconfigurations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$AchievementConfiguration>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AchievementConfiguration>,
       callback?: BodyResponseCallback<Schema$AchievementConfiguration>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AchievementConfiguration>,
       callback?: BodyResponseCallback<Schema$AchievementConfiguration>):
@@ -494,15 +494,15 @@ export class Resource$Achievementconfigurations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AchievementConfiguration>;
   insert(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AchievementConfiguration>,
       callback?: BodyResponseCallback<Schema$AchievementConfiguration>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AchievementConfiguration>,
       callback?: BodyResponseCallback<Schema$AchievementConfiguration>):
@@ -554,17 +554,17 @@ export class Resource$Achievementconfigurations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AchievementConfigurationListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AchievementConfigurationListResponse>,
       callback?:
           BodyResponseCallback<Schema$AchievementConfigurationListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AchievementConfigurationListResponse>,
       callback?:
@@ -619,15 +619,15 @@ export class Resource$Achievementconfigurations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AchievementConfiguration>;
   patch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AchievementConfiguration>,
       callback?: BodyResponseCallback<Schema$AchievementConfiguration>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AchievementConfiguration>,
       callback?: BodyResponseCallback<Schema$AchievementConfiguration>):
@@ -678,15 +678,15 @@ export class Resource$Achievementconfigurations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AchievementConfiguration>;
   update(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AchievementConfiguration>,
       callback?: BodyResponseCallback<Schema$AchievementConfiguration>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AchievementConfiguration>,
       callback?: BodyResponseCallback<Schema$AchievementConfiguration>):
@@ -751,14 +751,14 @@ export class Resource$Imageconfigurations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  upload(params: any, options?: MethodOptions):
+  upload(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ImageConfiguration>;
   upload(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ImageConfiguration>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ImageConfiguration>,
       callback?: BodyResponseCallback<Schema$ImageConfiguration>): void;
   upload(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ImageConfiguration>,
       callback?: BodyResponseCallback<Schema$ImageConfiguration>):
       void|AxiosPromise<Schema$ImageConfiguration> {
@@ -823,12 +823,12 @@ export class Resource$Leaderboardconfigurations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -875,13 +875,13 @@ export class Resource$Leaderboardconfigurations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$LeaderboardConfiguration>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$LeaderboardConfiguration>,
       callback?: BodyResponseCallback<Schema$LeaderboardConfiguration>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$LeaderboardConfiguration>,
       callback?: BodyResponseCallback<Schema$LeaderboardConfiguration>):
@@ -931,15 +931,15 @@ export class Resource$Leaderboardconfigurations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LeaderboardConfiguration>;
   insert(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$LeaderboardConfiguration>,
       callback?: BodyResponseCallback<Schema$LeaderboardConfiguration>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$LeaderboardConfiguration>,
       callback?: BodyResponseCallback<Schema$LeaderboardConfiguration>):
@@ -991,17 +991,17 @@ export class Resource$Leaderboardconfigurations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LeaderboardConfigurationListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$LeaderboardConfigurationListResponse>,
       callback?:
           BodyResponseCallback<Schema$LeaderboardConfigurationListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$LeaderboardConfigurationListResponse>,
       callback?:
@@ -1056,15 +1056,15 @@ export class Resource$Leaderboardconfigurations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LeaderboardConfiguration>;
   patch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$LeaderboardConfiguration>,
       callback?: BodyResponseCallback<Schema$LeaderboardConfiguration>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$LeaderboardConfiguration>,
       callback?: BodyResponseCallback<Schema$LeaderboardConfiguration>):
@@ -1115,15 +1115,15 @@ export class Resource$Leaderboardconfigurations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LeaderboardConfiguration>;
   update(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$LeaderboardConfiguration>,
       callback?: BodyResponseCallback<Schema$LeaderboardConfiguration>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$LeaderboardConfiguration>,
       callback?: BodyResponseCallback<Schema$LeaderboardConfiguration>):
diff --git a/src/apis/gamesManagement/v1management.ts b/src/apis/gamesManagement/v1management.ts
index 14c90f72ba..c022158602 100644
--- a/src/apis/gamesManagement/v1management.ts
+++ b/src/apis/gamesManagement/v1management.ts
@@ -401,15 +401,15 @@ export class Resource$Achievements {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  reset(params: any, options?: MethodOptions):
+  reset(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AchievementResetResponse>;
   reset(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AchievementResetResponse>,
       callback?: BodyResponseCallback<Schema$AchievementResetResponse>): void;
   reset(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AchievementResetResponse>,
       callback?: BodyResponseCallback<Schema$AchievementResetResponse>):
@@ -459,16 +459,16 @@ export class Resource$Achievements {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resetAll(params: any, options?: MethodOptions):
+  resetAll(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AchievementResetAllResponse>;
   resetAll(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AchievementResetAllResponse>,
       callback?: BodyResponseCallback<Schema$AchievementResetAllResponse>):
       void;
   resetAll(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AchievementResetAllResponse>,
       callback?: BodyResponseCallback<Schema$AchievementResetAllResponse>):
@@ -517,13 +517,13 @@ export class Resource$Achievements {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resetAllForAllPlayers(params: any, options?: MethodOptions):
+  resetAllForAllPlayers(params?: any, options?: MethodOptions):
       AxiosPromise<void>;
   resetAllForAllPlayers(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   resetAllForAllPlayers(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -571,12 +571,12 @@ export class Resource$Achievements {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resetForAllPlayers(params: any, options?: MethodOptions): AxiosPromise<void>;
+  resetForAllPlayers(params?: any, options?: MethodOptions): AxiosPromise<void>;
   resetForAllPlayers(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   resetForAllPlayers(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -625,13 +625,13 @@ export class Resource$Achievements {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resetMultipleForAllPlayers(params: any, options?: MethodOptions):
+  resetMultipleForAllPlayers(params?: any, options?: MethodOptions):
       AxiosPromise<void>;
   resetMultipleForAllPlayers(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   resetMultipleForAllPlayers(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -692,14 +692,14 @@ export class Resource$Applications {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listHidden(params: any, options?: MethodOptions):
+  listHidden(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$HiddenPlayerList>;
   listHidden(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$HiddenPlayerList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$HiddenPlayerList>,
       callback?: BodyResponseCallback<Schema$HiddenPlayerList>): void;
   listHidden(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$HiddenPlayerList>,
       callback?: BodyResponseCallback<Schema$HiddenPlayerList>):
       void|AxiosPromise<Schema$HiddenPlayerList> {
@@ -763,12 +763,12 @@ export class Resource$Events {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  reset(params: any, options?: MethodOptions): AxiosPromise<void>;
+  reset(params?: any, options?: MethodOptions): AxiosPromise<void>;
   reset(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   reset(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -815,12 +815,12 @@ export class Resource$Events {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resetAll(params: any, options?: MethodOptions): AxiosPromise<void>;
+  resetAll(params?: any, options?: MethodOptions): AxiosPromise<void>;
   resetAll(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   resetAll(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -866,13 +866,13 @@ export class Resource$Events {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resetAllForAllPlayers(params: any, options?: MethodOptions):
+  resetAllForAllPlayers(params?: any, options?: MethodOptions):
       AxiosPromise<void>;
   resetAllForAllPlayers(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   resetAllForAllPlayers(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -919,12 +919,12 @@ export class Resource$Events {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resetForAllPlayers(params: any, options?: MethodOptions): AxiosPromise<void>;
+  resetForAllPlayers(params?: any, options?: MethodOptions): AxiosPromise<void>;
   resetForAllPlayers(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   resetForAllPlayers(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -972,13 +972,13 @@ export class Resource$Events {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resetMultipleForAllPlayers(params: any, options?: MethodOptions):
+  resetMultipleForAllPlayers(params?: any, options?: MethodOptions):
       AxiosPromise<void>;
   resetMultipleForAllPlayers(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   resetMultipleForAllPlayers(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1039,12 +1039,12 @@ export class Resource$Players {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  hide(params: any, options?: MethodOptions): AxiosPromise<void>;
+  hide(params?: any, options?: MethodOptions): AxiosPromise<void>;
   hide(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   hide(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1094,12 +1094,12 @@ export class Resource$Players {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  unhide(params: any, options?: MethodOptions): AxiosPromise<void>;
+  unhide(params?: any, options?: MethodOptions): AxiosPromise<void>;
   unhide(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   unhide(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1160,12 +1160,12 @@ export class Resource$Quests {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  reset(params: any, options?: MethodOptions): AxiosPromise<void>;
+  reset(params?: any, options?: MethodOptions): AxiosPromise<void>;
   reset(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   reset(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1211,12 +1211,12 @@ export class Resource$Quests {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resetAll(params: any, options?: MethodOptions): AxiosPromise<void>;
+  resetAll(params?: any, options?: MethodOptions): AxiosPromise<void>;
   resetAll(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   resetAll(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1261,13 +1261,13 @@ export class Resource$Quests {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resetAllForAllPlayers(params: any, options?: MethodOptions):
+  resetAllForAllPlayers(params?: any, options?: MethodOptions):
       AxiosPromise<void>;
   resetAllForAllPlayers(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   resetAllForAllPlayers(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1314,12 +1314,12 @@ export class Resource$Quests {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resetForAllPlayers(params: any, options?: MethodOptions): AxiosPromise<void>;
+  resetForAllPlayers(params?: any, options?: MethodOptions): AxiosPromise<void>;
   resetForAllPlayers(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   resetForAllPlayers(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1367,13 +1367,13 @@ export class Resource$Quests {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resetMultipleForAllPlayers(params: any, options?: MethodOptions):
+  resetMultipleForAllPlayers(params?: any, options?: MethodOptions):
       AxiosPromise<void>;
   resetMultipleForAllPlayers(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   resetMultipleForAllPlayers(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1432,12 +1432,12 @@ export class Resource$Rooms {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  reset(params: any, options?: MethodOptions): AxiosPromise<void>;
+  reset(params?: any, options?: MethodOptions): AxiosPromise<void>;
   reset(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   reset(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1483,12 +1483,12 @@ export class Resource$Rooms {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resetForAllPlayers(params: any, options?: MethodOptions): AxiosPromise<void>;
+  resetForAllPlayers(params?: any, options?: MethodOptions): AxiosPromise<void>;
   resetForAllPlayers(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   resetForAllPlayers(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1547,15 +1547,15 @@ export class Resource$Scores {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  reset(params: any, options?: MethodOptions):
+  reset(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PlayerScoreResetResponse>;
   reset(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$PlayerScoreResetResponse>,
       callback?: BodyResponseCallback<Schema$PlayerScoreResetResponse>): void;
   reset(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$PlayerScoreResetResponse>,
       callback?: BodyResponseCallback<Schema$PlayerScoreResetResponse>):
@@ -1606,16 +1606,16 @@ export class Resource$Scores {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resetAll(params: any, options?: MethodOptions):
+  resetAll(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PlayerScoreResetAllResponse>;
   resetAll(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$PlayerScoreResetAllResponse>,
       callback?: BodyResponseCallback<Schema$PlayerScoreResetAllResponse>):
       void;
   resetAll(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$PlayerScoreResetAllResponse>,
       callback?: BodyResponseCallback<Schema$PlayerScoreResetAllResponse>):
@@ -1664,13 +1664,13 @@ export class Resource$Scores {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resetAllForAllPlayers(params: any, options?: MethodOptions):
+  resetAllForAllPlayers(params?: any, options?: MethodOptions):
       AxiosPromise<void>;
   resetAllForAllPlayers(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   resetAllForAllPlayers(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1717,12 +1717,12 @@ export class Resource$Scores {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resetForAllPlayers(params: any, options?: MethodOptions): AxiosPromise<void>;
+  resetForAllPlayers(params?: any, options?: MethodOptions): AxiosPromise<void>;
   resetForAllPlayers(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   resetForAllPlayers(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1771,13 +1771,13 @@ export class Resource$Scores {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resetMultipleForAllPlayers(params: any, options?: MethodOptions):
+  resetMultipleForAllPlayers(params?: any, options?: MethodOptions):
       AxiosPromise<void>;
   resetMultipleForAllPlayers(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   resetMultipleForAllPlayers(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1835,12 +1835,12 @@ export class Resource$Turnbasedmatches {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  reset(params: any, options?: MethodOptions): AxiosPromise<void>;
+  reset(params?: any, options?: MethodOptions): AxiosPromise<void>;
   reset(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   reset(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1886,12 +1886,12 @@ export class Resource$Turnbasedmatches {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resetForAllPlayers(params: any, options?: MethodOptions): AxiosPromise<void>;
+  resetForAllPlayers(params?: any, options?: MethodOptions): AxiosPromise<void>;
   resetForAllPlayers(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   resetForAllPlayers(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
diff --git a/src/apis/genomics/v1.ts b/src/apis/genomics/v1.ts
index 536e383087..524c11a63d 100644
--- a/src/apis/genomics/v1.ts
+++ b/src/apis/genomics/v1.ts
@@ -2331,16 +2331,16 @@ export class Resource$Annotations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchCreate(params: any, options?: MethodOptions):
+  batchCreate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BatchCreateAnnotationsResponse>;
   batchCreate(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$BatchCreateAnnotationsResponse>,
       callback?: BodyResponseCallback<Schema$BatchCreateAnnotationsResponse>):
       void;
   batchCreate(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$BatchCreateAnnotationsResponse>,
       callback?: BodyResponseCallback<Schema$BatchCreateAnnotationsResponse>):
@@ -2451,13 +2451,14 @@ export class Resource$Annotations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Annotation>;
+  create(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Annotation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Annotation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Annotation>,
       callback?: BodyResponseCallback<Schema$Annotation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Annotation>,
       callback?: BodyResponseCallback<Schema$Annotation>):
       void|AxiosPromise<Schema$Annotation> {
@@ -2553,12 +2554,12 @@ export class Resource$Annotations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2657,11 +2658,11 @@ export class Resource$Annotations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Annotation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Annotation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Annotation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Annotation>,
       callback?: BodyResponseCallback<Schema$Annotation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Annotation>,
       callback?: BodyResponseCallback<Schema$Annotation>):
       void|AxiosPromise<Schema$Annotation> {
@@ -2781,15 +2782,15 @@ export class Resource$Annotations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  search(params: any, options?: MethodOptions):
+  search(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SearchAnnotationsResponse>;
   search(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SearchAnnotationsResponse>,
       callback?: BodyResponseCallback<Schema$SearchAnnotationsResponse>): void;
   search(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SearchAnnotationsResponse>,
       callback?: BodyResponseCallback<Schema$SearchAnnotationsResponse>):
@@ -2898,13 +2899,14 @@ export class Resource$Annotations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Annotation>;
+  update(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Annotation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Annotation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Annotation>,
       callback?: BodyResponseCallback<Schema$Annotation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Annotation>,
       callback?: BodyResponseCallback<Schema$Annotation>):
       void|AxiosPromise<Schema$Annotation> {
@@ -3019,14 +3021,14 @@ export class Resource$Annotationsets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AnnotationSet>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AnnotationSet>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AnnotationSet>,
       callback?: BodyResponseCallback<Schema$AnnotationSet>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AnnotationSet>,
       callback?: BodyResponseCallback<Schema$AnnotationSet>):
       void|AxiosPromise<Schema$AnnotationSet> {
@@ -3123,12 +3125,12 @@ export class Resource$Annotationsets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -3228,11 +3230,12 @@ export class Resource$Annotationsets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$AnnotationSet>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AnnotationSet>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$AnnotationSet>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AnnotationSet>,
       callback?: BodyResponseCallback<Schema$AnnotationSet>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AnnotationSet>,
       callback?: BodyResponseCallback<Schema$AnnotationSet>):
       void|AxiosPromise<Schema$AnnotationSet> {
@@ -3351,16 +3354,16 @@ export class Resource$Annotationsets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  search(params: any, options?: MethodOptions):
+  search(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SearchAnnotationSetsResponse>;
   search(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SearchAnnotationSetsResponse>,
       callback?: BodyResponseCallback<Schema$SearchAnnotationSetsResponse>):
       void;
   search(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SearchAnnotationSetsResponse>,
       callback?: BodyResponseCallback<Schema$SearchAnnotationSetsResponse>):
@@ -3472,14 +3475,14 @@ export class Resource$Annotationsets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AnnotationSet>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AnnotationSet>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AnnotationSet>,
       callback?: BodyResponseCallback<Schema$AnnotationSet>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AnnotationSet>,
       callback?: BodyResponseCallback<Schema$AnnotationSet>):
       void|AxiosPromise<Schema$AnnotationSet> {
@@ -3593,12 +3596,14 @@ export class Resource$Callsets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$CallSet>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$CallSet>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$CallSet>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CallSet>,
       callback?: BodyResponseCallback<Schema$CallSet>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$CallSet>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CallSet>,
       callback?: BodyResponseCallback<Schema$CallSet>):
       void|AxiosPromise<Schema$CallSet> {
     if (typeof options === 'function') {
@@ -3694,12 +3699,12 @@ export class Resource$Callsets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -3799,10 +3804,12 @@ export class Resource$Callsets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$CallSet>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$CallSet>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$CallSet>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CallSet>,
       callback?: BodyResponseCallback<Schema$CallSet>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$CallSet>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CallSet>,
       callback?: BodyResponseCallback<Schema$CallSet>):
       void|AxiosPromise<Schema$CallSet> {
     if (typeof options === 'function') {
@@ -3911,12 +3918,14 @@ export class Resource$Callsets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$CallSet>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$CallSet>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$CallSet>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CallSet>,
       callback?: BodyResponseCallback<Schema$CallSet>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$CallSet>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CallSet>,
       callback?: BodyResponseCallback<Schema$CallSet>):
       void|AxiosPromise<Schema$CallSet> {
     if (typeof options === 'function') {
@@ -4032,15 +4041,15 @@ export class Resource$Callsets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  search(params: any, options?: MethodOptions):
+  search(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SearchCallSetsResponse>;
   search(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SearchCallSetsResponse>,
       callback?: BodyResponseCallback<Schema$SearchCallSetsResponse>): void;
   search(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SearchCallSetsResponse>,
       callback?: BodyResponseCallback<Schema$SearchCallSetsResponse>):
@@ -4155,12 +4164,14 @@ export class Resource$Datasets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Dataset>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Dataset>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Dataset>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Dataset>,
       callback?: BodyResponseCallback<Schema$Dataset>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Dataset>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Dataset>,
       callback?: BodyResponseCallback<Schema$Dataset>):
       void|AxiosPromise<Schema$Dataset> {
     if (typeof options === 'function') {
@@ -4259,12 +4270,12 @@ export class Resource$Datasets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -4364,10 +4375,12 @@ export class Resource$Datasets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Dataset>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Dataset>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Dataset>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Dataset>,
       callback?: BodyResponseCallback<Schema$Dataset>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Dataset>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Dataset>,
       callback?: BodyResponseCallback<Schema$Dataset>):
       void|AxiosPromise<Schema$Dataset> {
     if (typeof options === 'function') {
@@ -4477,13 +4490,13 @@ export class Resource$Datasets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -4595,14 +4608,14 @@ export class Resource$Datasets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListDatasetsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListDatasetsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListDatasetsResponse>,
       callback?: BodyResponseCallback<Schema$ListDatasetsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListDatasetsResponse>,
       callback?: BodyResponseCallback<Schema$ListDatasetsResponse>):
       void|AxiosPromise<Schema$ListDatasetsResponse> {
@@ -4711,12 +4724,14 @@ export class Resource$Datasets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Dataset>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Dataset>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Dataset>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Dataset>,
       callback?: BodyResponseCallback<Schema$Dataset>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Dataset>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Dataset>,
       callback?: BodyResponseCallback<Schema$Dataset>):
       void|AxiosPromise<Schema$Dataset> {
     if (typeof options === 'function') {
@@ -4826,13 +4841,13 @@ export class Resource$Datasets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -4941,15 +4956,15 @@ export class Resource$Datasets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestIamPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>):
@@ -5058,12 +5073,14 @@ export class Resource$Datasets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  undelete(params: any, options?: MethodOptions): AxiosPromise<Schema$Dataset>;
+  undelete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Dataset>;
   undelete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Dataset>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Dataset>,
       callback?: BodyResponseCallback<Schema$Dataset>): void;
   undelete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Dataset>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Dataset>,
       callback?: BodyResponseCallback<Schema$Dataset>):
       void|AxiosPromise<Schema$Dataset> {
     if (typeof options === 'function') {
@@ -5179,12 +5196,12 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancel(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  cancel(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   cancel(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   cancel(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -5283,11 +5300,11 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -5401,15 +5418,15 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListOperationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>):
@@ -5524,12 +5541,12 @@ export class Resource$Readgroupsets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -5641,13 +5658,13 @@ export class Resource$Readgroupsets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  export(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  export(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   export(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   export(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -5749,11 +5766,11 @@ export class Resource$Readgroupsets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$ReadGroupSet>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ReadGroupSet>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$ReadGroupSet>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ReadGroupSet>,
       callback?: BodyResponseCallback<Schema$ReadGroupSet>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ReadGroupSet>,
       callback?: BodyResponseCallback<Schema$ReadGroupSet>):
       void|AxiosPromise<Schema$ReadGroupSet> {
@@ -5864,9 +5881,9 @@ export class Resource$Readgroupsets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-import(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-import(params: any, options: MethodOptions|BodyResponseCallback<Schema$Operation>, callback?: BodyResponseCallback<Schema$Operation>): void;
-import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Operation>, callback?: BodyResponseCallback<Schema$Operation>): void|AxiosPromise<Schema$Operation> {if(typeof options === 'function') {
+import(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+import(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Operation>, callback?: BodyResponseCallback<Schema$Operation>): void;
+import(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Operation>, callback?: BodyResponseCallback<Schema$Operation>): void|AxiosPromise<Schema$Operation> {if(typeof options === 'function') {
     callback = options;
     options = {};
   } if(typeof params === 'function') {
@@ -5948,13 +5965,13 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Operatio
  * @param {callback} callback The callback that handles the response.
  * @return {object} Request object
  */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$ReadGroupSet>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$ReadGroupSet>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ReadGroupSet>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ReadGroupSet>,
       callback?: BodyResponseCallback<Schema$ReadGroupSet>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ReadGroupSet>,
       callback?: BodyResponseCallback<Schema$ReadGroupSet>):
       void|AxiosPromise<Schema$ReadGroupSet> {
@@ -6073,16 +6090,16 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Operatio
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  search(params: any, options?: MethodOptions):
+  search(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SearchReadGroupSetsResponse>;
   search(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SearchReadGroupSetsResponse>,
       callback?: BodyResponseCallback<Schema$SearchReadGroupSetsResponse>):
       void;
   search(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SearchReadGroupSetsResponse>,
       callback?: BodyResponseCallback<Schema$SearchReadGroupSetsResponse>):
@@ -6225,16 +6242,16 @@ export class Resource$Readgroupsets$Coveragebuckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListCoverageBucketsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListCoverageBucketsResponse>,
       callback?: BodyResponseCallback<Schema$ListCoverageBucketsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListCoverageBucketsResponse>,
       callback?: BodyResponseCallback<Schema$ListCoverageBucketsResponse>):
@@ -6379,14 +6396,14 @@ export class Resource$Reads {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  search(params: any, options?: MethodOptions):
+  search(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SearchReadsResponse>;
   search(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SearchReadsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SearchReadsResponse>,
       callback?: BodyResponseCallback<Schema$SearchReadsResponse>): void;
   search(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SearchReadsResponse>,
       callback?: BodyResponseCallback<Schema$SearchReadsResponse>):
       void|AxiosPromise<Schema$SearchReadsResponse> {
@@ -6502,11 +6519,11 @@ export class Resource$References {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Reference>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Reference>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Reference>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Reference>,
       callback?: BodyResponseCallback<Schema$Reference>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Reference>,
       callback?: BodyResponseCallback<Schema$Reference>):
       void|AxiosPromise<Schema$Reference> {
@@ -6624,15 +6641,15 @@ export class Resource$References {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  search(params: any, options?: MethodOptions):
+  search(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SearchReferencesResponse>;
   search(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SearchReferencesResponse>,
       callback?: BodyResponseCallback<Schema$SearchReferencesResponse>): void;
   search(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SearchReferencesResponse>,
       callback?: BodyResponseCallback<Schema$SearchReferencesResponse>):
@@ -6763,14 +6780,14 @@ export class Resource$References$Bases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListBasesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListBasesResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListBasesResponse>,
       callback?: BodyResponseCallback<Schema$ListBasesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListBasesResponse>,
       callback?: BodyResponseCallback<Schema$ListBasesResponse>):
       void|AxiosPromise<Schema$ListBasesResponse> {
@@ -6887,11 +6904,11 @@ export class Resource$Referencesets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$ReferenceSet>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ReferenceSet>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$ReferenceSet>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ReferenceSet>,
       callback?: BodyResponseCallback<Schema$ReferenceSet>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ReferenceSet>,
       callback?: BodyResponseCallback<Schema$ReferenceSet>):
       void|AxiosPromise<Schema$ReferenceSet> {
@@ -7010,16 +7027,16 @@ export class Resource$Referencesets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  search(params: any, options?: MethodOptions):
+  search(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SearchReferenceSetsResponse>;
   search(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SearchReferenceSetsResponse>,
       callback?: BodyResponseCallback<Schema$SearchReferenceSetsResponse>):
       void;
   search(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SearchReferenceSetsResponse>,
       callback?: BodyResponseCallback<Schema$SearchReferenceSetsResponse>):
@@ -7135,12 +7152,14 @@ export class Resource$Variants {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Variant>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Variant>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Variant>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Variant>,
       callback?: BodyResponseCallback<Schema$Variant>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Variant>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Variant>,
       callback?: BodyResponseCallback<Schema$Variant>):
       void|AxiosPromise<Schema$Variant> {
     if (typeof options === 'function') {
@@ -7236,12 +7255,12 @@ export class Resource$Variants {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -7341,10 +7360,12 @@ export class Resource$Variants {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Variant>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Variant>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Variant>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Variant>,
       callback?: BodyResponseCallback<Schema$Variant>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Variant>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Variant>,
       callback?: BodyResponseCallback<Schema$Variant>):
       void|AxiosPromise<Schema$Variant> {
     if (typeof options === 'function') {
@@ -7455,9 +7476,9 @@ export class Resource$Variants {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-import(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-import(params: any, options: MethodOptions|BodyResponseCallback<Schema$Operation>, callback?: BodyResponseCallback<Schema$Operation>): void;
-import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Operation>, callback?: BodyResponseCallback<Schema$Operation>): void|AxiosPromise<Schema$Operation> {if(typeof options === 'function') {
+import(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+import(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Operation>, callback?: BodyResponseCallback<Schema$Operation>): void;
+import(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Operation>, callback?: BodyResponseCallback<Schema$Operation>): void|AxiosPromise<Schema$Operation> {if(typeof options === 'function') {
     callback = options;
     options = {};
   } if(typeof params === 'function') {
@@ -7529,12 +7550,12 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Operatio
  * @param {callback} callback The callback that handles the response.
  * @return {object} Request object
  */
-  merge(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  merge(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   merge(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   merge(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -7643,12 +7664,14 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Operatio
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Variant>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Variant>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Variant>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Variant>,
       callback?: BodyResponseCallback<Schema$Variant>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Variant>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Variant>,
       callback?: BodyResponseCallback<Schema$Variant>):
       void|AxiosPromise<Schema$Variant> {
     if (typeof options === 'function') {
@@ -7764,15 +7787,15 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Operatio
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  search(params: any, options?: MethodOptions):
+  search(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SearchVariantsResponse>;
   search(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SearchVariantsResponse>,
       callback?: BodyResponseCallback<Schema$SearchVariantsResponse>): void;
   search(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SearchVariantsResponse>,
       callback?: BodyResponseCallback<Schema$SearchVariantsResponse>):
@@ -7890,13 +7913,14 @@ export class Resource$Variantsets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$VariantSet>;
+  create(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$VariantSet>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$VariantSet>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$VariantSet>,
       callback?: BodyResponseCallback<Schema$VariantSet>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$VariantSet>,
       callback?: BodyResponseCallback<Schema$VariantSet>):
       void|AxiosPromise<Schema$VariantSet> {
@@ -7994,12 +8018,12 @@ export class Resource$Variantsets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -8106,13 +8130,13 @@ export class Resource$Variantsets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  export(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  export(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   export(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   export(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -8213,11 +8237,11 @@ export class Resource$Variantsets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$VariantSet>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$VariantSet>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$VariantSet>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$VariantSet>,
       callback?: BodyResponseCallback<Schema$VariantSet>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$VariantSet>,
       callback?: BodyResponseCallback<Schema$VariantSet>):
       void|AxiosPromise<Schema$VariantSet> {
@@ -8326,13 +8350,13 @@ export class Resource$Variantsets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$VariantSet>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$VariantSet>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$VariantSet>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$VariantSet>,
       callback?: BodyResponseCallback<Schema$VariantSet>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$VariantSet>,
       callback?: BodyResponseCallback<Schema$VariantSet>):
       void|AxiosPromise<Schema$VariantSet> {
@@ -8451,15 +8475,15 @@ export class Resource$Variantsets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  search(params: any, options?: MethodOptions):
+  search(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SearchVariantSetsResponse>;
   search(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SearchVariantSetsResponse>,
       callback?: BodyResponseCallback<Schema$SearchVariantSetsResponse>): void;
   search(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SearchVariantSetsResponse>,
       callback?: BodyResponseCallback<Schema$SearchVariantSetsResponse>):
diff --git a/src/apis/genomics/v1alpha2.ts b/src/apis/genomics/v1alpha2.ts
index 2b99bcfa5b..ea0dedff40 100644
--- a/src/apis/genomics/v1alpha2.ts
+++ b/src/apis/genomics/v1alpha2.ts
@@ -965,12 +965,12 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancel(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  cancel(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   cancel(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   cancel(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1070,11 +1070,11 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1188,15 +1188,15 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListOperationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>):
@@ -1311,12 +1311,13 @@ export class Resource$Pipelines {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Pipeline>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Pipeline>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Pipeline>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Pipeline>,
       callback?: BodyResponseCallback<Schema$Pipeline>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Pipeline>,
       callback?: BodyResponseCallback<Schema$Pipeline>):
       void|AxiosPromise<Schema$Pipeline> {
@@ -1414,12 +1415,12 @@ export class Resource$Pipelines {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1519,10 +1520,11 @@ export class Resource$Pipelines {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Pipeline>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Pipeline>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Pipeline>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Pipeline>,
       callback?: BodyResponseCallback<Schema$Pipeline>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Pipeline>,
       callback?: BodyResponseCallback<Schema$Pipeline>):
       void|AxiosPromise<Schema$Pipeline> {
@@ -1620,14 +1622,14 @@ export class Resource$Pipelines {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getControllerConfig(params: any, options?: MethodOptions):
+  getControllerConfig(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ControllerConfig>;
   getControllerConfig(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ControllerConfig>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ControllerConfig>,
       callback?: BodyResponseCallback<Schema$ControllerConfig>): void;
   getControllerConfig(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ControllerConfig>,
       callback?: BodyResponseCallback<Schema$ControllerConfig>):
       void|AxiosPromise<Schema$ControllerConfig> {
@@ -1739,14 +1741,15 @@ export class Resource$Pipelines {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListPipelinesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListPipelinesResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ListPipelinesResponse>,
       callback?: BodyResponseCallback<Schema$ListPipelinesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListPipelinesResponse>,
       callback?: BodyResponseCallback<Schema$ListPipelinesResponse>):
@@ -1853,11 +1856,11 @@ export class Resource$Pipelines {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  run(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  run(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  run(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  run(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  run(params: any,
+  run(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1958,13 +1961,13 @@ export class Resource$Pipelines {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setOperationStatus(params: any, options?: MethodOptions):
+  setOperationStatus(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Empty>;
   setOperationStatus(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   setOperationStatus(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
diff --git a/src/apis/genomics/v2alpha1.ts b/src/apis/genomics/v2alpha1.ts
index 058dd8b505..798e77a6be 100644
--- a/src/apis/genomics/v2alpha1.ts
+++ b/src/apis/genomics/v2alpha1.ts
@@ -817,11 +817,11 @@ export class Resource$Pipelines {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  run(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  run(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  run(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  run(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  run(params: any,
+  run(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -898,12 +898,12 @@ export class Resource$Projects$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancel(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  cancel(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   cancel(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   cancel(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -951,11 +951,11 @@ export class Resource$Projects$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1004,15 +1004,15 @@ export class Resource$Projects$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListOperationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>):
@@ -1074,14 +1074,14 @@ export class Resource$Workers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  checkIn(params: any, options?: MethodOptions):
+  checkIn(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CheckInResponse>;
   checkIn(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CheckInResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CheckInResponse>,
       callback?: BodyResponseCallback<Schema$CheckInResponse>): void;
   checkIn(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CheckInResponse>,
       callback?: BodyResponseCallback<Schema$CheckInResponse>):
       void|AxiosPromise<Schema$CheckInResponse> {
diff --git a/src/apis/gmail/v1.ts b/src/apis/gmail/v1.ts
index 03c7ef6fc6..21b03e591c 100644
--- a/src/apis/gmail/v1.ts
+++ b/src/apis/gmail/v1.ts
@@ -929,13 +929,15 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getProfile(params: any, options?: MethodOptions):
+  getProfile(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Profile>;
   getProfile(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Profile>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Profile>,
       callback?: BodyResponseCallback<Schema$Profile>): void;
   getProfile(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Profile>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Profile>,
       callback?: BodyResponseCallback<Schema$Profile>):
       void|AxiosPromise<Schema$Profile> {
     if (typeof options === 'function') {
@@ -981,12 +983,12 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  stop(params: any, options?: MethodOptions): AxiosPromise<void>;
+  stop(params?: any, options?: MethodOptions): AxiosPromise<void>;
   stop(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   stop(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1032,14 +1034,14 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  watch(params: any, options?: MethodOptions):
+  watch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$WatchResponse>;
   watch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$WatchResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$WatchResponse>,
       callback?: BodyResponseCallback<Schema$WatchResponse>): void;
   watch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$WatchResponse>,
       callback?: BodyResponseCallback<Schema$WatchResponse>):
       void|AxiosPromise<Schema$WatchResponse> {
@@ -1101,12 +1103,12 @@ export class Resource$Users$Drafts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Draft>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Draft>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Draft>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Draft>,
       callback?: BodyResponseCallback<Schema$Draft>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Draft>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Draft>,
       callback?: BodyResponseCallback<Schema$Draft>):
       void|AxiosPromise<Schema$Draft> {
     if (typeof options === 'function') {
@@ -1156,12 +1158,12 @@ export class Resource$Users$Drafts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1208,10 +1210,10 @@ export class Resource$Users$Drafts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Draft>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Draft>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Draft>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Draft>,
       callback?: BodyResponseCallback<Schema$Draft>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Draft>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Draft>,
       callback?: BodyResponseCallback<Schema$Draft>):
       void|AxiosPromise<Schema$Draft> {
     if (typeof options === 'function') {
@@ -1261,14 +1263,14 @@ export class Resource$Users$Drafts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListDraftsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListDraftsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListDraftsResponse>,
       callback?: BodyResponseCallback<Schema$ListDraftsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListDraftsResponse>,
       callback?: BodyResponseCallback<Schema$ListDraftsResponse>):
       void|AxiosPromise<Schema$ListDraftsResponse> {
@@ -1320,12 +1322,14 @@ export class Resource$Users$Drafts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  send(params: any, options?: MethodOptions): AxiosPromise<Schema$Message>;
+  send(params?: any, options?: MethodOptions): AxiosPromise<Schema$Message>;
   send(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Message>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Message>,
       callback?: BodyResponseCallback<Schema$Message>): void;
   send(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Message>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Message>,
       callback?: BodyResponseCallback<Schema$Message>):
       void|AxiosPromise<Schema$Message> {
     if (typeof options === 'function') {
@@ -1378,12 +1382,12 @@ export class Resource$Users$Drafts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Draft>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Draft>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Draft>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Draft>,
       callback?: BodyResponseCallback<Schema$Draft>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Draft>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Draft>,
       callback?: BodyResponseCallback<Schema$Draft>):
       void|AxiosPromise<Schema$Draft> {
     if (typeof options === 'function') {
@@ -1449,14 +1453,14 @@ export class Resource$Users$History {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListHistoryResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListHistoryResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListHistoryResponse>,
       callback?: BodyResponseCallback<Schema$ListHistoryResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListHistoryResponse>,
       callback?: BodyResponseCallback<Schema$ListHistoryResponse>):
       void|AxiosPromise<Schema$ListHistoryResponse> {
@@ -1516,12 +1520,12 @@ export class Resource$Users$Labels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Label>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Label>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Label>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Label>,
       callback?: BodyResponseCallback<Schema$Label>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Label>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Label>,
       callback?: BodyResponseCallback<Schema$Label>):
       void|AxiosPromise<Schema$Label> {
     if (typeof options === 'function') {
@@ -1569,12 +1573,12 @@ export class Resource$Users$Labels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1620,10 +1624,10 @@ export class Resource$Users$Labels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Label>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Label>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Label>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Label>,
       callback?: BodyResponseCallback<Schema$Label>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Label>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Label>,
       callback?: BodyResponseCallback<Schema$Label>):
       void|AxiosPromise<Schema$Label> {
     if (typeof options === 'function') {
@@ -1669,14 +1673,14 @@ export class Resource$Users$Labels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListLabelsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListLabelsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListLabelsResponse>,
       callback?: BodyResponseCallback<Schema$ListLabelsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListLabelsResponse>,
       callback?: BodyResponseCallback<Schema$ListLabelsResponse>):
       void|AxiosPromise<Schema$ListLabelsResponse> {
@@ -1725,12 +1729,12 @@ export class Resource$Users$Labels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Label>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Label>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Label>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Label>,
       callback?: BodyResponseCallback<Schema$Label>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Label>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Label>,
       callback?: BodyResponseCallback<Schema$Label>):
       void|AxiosPromise<Schema$Label> {
     if (typeof options === 'function') {
@@ -1778,12 +1782,12 @@ export class Resource$Users$Labels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Label>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Label>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Label>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Label>,
       callback?: BodyResponseCallback<Schema$Label>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Label>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Label>,
       callback?: BodyResponseCallback<Schema$Label>):
       void|AxiosPromise<Schema$Label> {
     if (typeof options === 'function') {
@@ -1845,12 +1849,12 @@ export class Resource$Users$Messages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchDelete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  batchDelete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   batchDelete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   batchDelete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1896,12 +1900,12 @@ export class Resource$Users$Messages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchModify(params: any, options?: MethodOptions): AxiosPromise<void>;
+  batchModify(params?: any, options?: MethodOptions): AxiosPromise<void>;
   batchModify(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   batchModify(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1948,12 +1952,12 @@ export class Resource$Users$Messages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2001,10 +2005,12 @@ export class Resource$Users$Messages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Message>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Message>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Message>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Message>,
       callback?: BodyResponseCallback<Schema$Message>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Message>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Message>,
       callback?: BodyResponseCallback<Schema$Message>):
       void|AxiosPromise<Schema$Message> {
     if (typeof options === 'function') {
@@ -2060,9 +2066,9 @@ export class Resource$Users$Messages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-import(params: any, options?: MethodOptions): AxiosPromise<Schema$Message>;
-import(params: any, options: MethodOptions|BodyResponseCallback<Schema$Message>, callback?: BodyResponseCallback<Schema$Message>): void;
-import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Message>, callback?: BodyResponseCallback<Schema$Message>): void|AxiosPromise<Schema$Message> {if(typeof options === 'function') {
+import(params?: any, options?: MethodOptions): AxiosPromise<Schema$Message>;
+import(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Message>, callback?: BodyResponseCallback<Schema$Message>): void;
+import(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Message>, callback?: BodyResponseCallback<Schema$Message>): void|AxiosPromise<Schema$Message> {if(typeof options === 'function') {
     callback = options;
     options = {};
   } if(typeof params === 'function') {
@@ -2092,12 +2098,14 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Message>
  * @param {callback} callback The callback that handles the response.
  * @return {object} Request object
  */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Message>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Message>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Message>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Message>,
       callback?: BodyResponseCallback<Schema$Message>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Message>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Message>,
       callback?: BodyResponseCallback<Schema$Message>):
       void|AxiosPromise<Schema$Message> {
     if (typeof options === 'function') {
@@ -2150,14 +2158,14 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Message>
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListMessagesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListMessagesResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListMessagesResponse>,
       callback?: BodyResponseCallback<Schema$ListMessagesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListMessagesResponse>,
       callback?: BodyResponseCallback<Schema$ListMessagesResponse>):
       void|AxiosPromise<Schema$ListMessagesResponse> {
@@ -2206,12 +2214,14 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Message>
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  modify(params: any, options?: MethodOptions): AxiosPromise<Schema$Message>;
+  modify(params?: any, options?: MethodOptions): AxiosPromise<Schema$Message>;
   modify(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Message>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Message>,
       callback?: BodyResponseCallback<Schema$Message>): void;
   modify(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Message>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Message>,
       callback?: BodyResponseCallback<Schema$Message>):
       void|AxiosPromise<Schema$Message> {
     if (typeof options === 'function') {
@@ -2262,12 +2272,14 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Message>
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  send(params: any, options?: MethodOptions): AxiosPromise<Schema$Message>;
+  send(params?: any, options?: MethodOptions): AxiosPromise<Schema$Message>;
   send(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Message>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Message>,
       callback?: BodyResponseCallback<Schema$Message>): void;
   send(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Message>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Message>,
       callback?: BodyResponseCallback<Schema$Message>):
       void|AxiosPromise<Schema$Message> {
     if (typeof options === 'function') {
@@ -2316,12 +2328,14 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Message>
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  trash(params: any, options?: MethodOptions): AxiosPromise<Schema$Message>;
+  trash(params?: any, options?: MethodOptions): AxiosPromise<Schema$Message>;
   trash(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Message>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Message>,
       callback?: BodyResponseCallback<Schema$Message>): void;
   trash(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Message>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Message>,
       callback?: BodyResponseCallback<Schema$Message>):
       void|AxiosPromise<Schema$Message> {
     if (typeof options === 'function') {
@@ -2368,12 +2382,14 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Message>
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  untrash(params: any, options?: MethodOptions): AxiosPromise<Schema$Message>;
+  untrash(params?: any, options?: MethodOptions): AxiosPromise<Schema$Message>;
   untrash(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Message>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Message>,
       callback?: BodyResponseCallback<Schema$Message>): void;
   untrash(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Message>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Message>,
       callback?: BodyResponseCallback<Schema$Message>):
       void|AxiosPromise<Schema$Message> {
     if (typeof options === 'function') {
@@ -2432,12 +2448,12 @@ export class Resource$Users$Messages$Attachments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$MessagePartBody>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$MessagePartBody>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$MessagePartBody>,
       callback?: BodyResponseCallback<Schema$MessagePartBody>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$MessagePartBody>,
       callback?: BodyResponseCallback<Schema$MessagePartBody>):
       void|AxiosPromise<Schema$MessagePartBody> {
@@ -2506,14 +2522,14 @@ export class Resource$Users$Settings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getAutoForwarding(params: any, options?: MethodOptions):
+  getAutoForwarding(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AutoForwarding>;
   getAutoForwarding(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AutoForwarding>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AutoForwarding>,
       callback?: BodyResponseCallback<Schema$AutoForwarding>): void;
   getAutoForwarding(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AutoForwarding>,
       callback?: BodyResponseCallback<Schema$AutoForwarding>):
       void|AxiosPromise<Schema$AutoForwarding> {
@@ -2560,14 +2576,14 @@ export class Resource$Users$Settings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getImap(params: any, options?: MethodOptions):
+  getImap(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ImapSettings>;
   getImap(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ImapSettings>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ImapSettings>,
       callback?: BodyResponseCallback<Schema$ImapSettings>): void;
   getImap(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ImapSettings>,
       callback?: BodyResponseCallback<Schema$ImapSettings>):
       void|AxiosPromise<Schema$ImapSettings> {
@@ -2614,14 +2630,14 @@ export class Resource$Users$Settings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getPop(params: any, options?: MethodOptions):
+  getPop(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PopSettings>;
   getPop(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PopSettings>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PopSettings>,
       callback?: BodyResponseCallback<Schema$PopSettings>): void;
   getPop(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PopSettings>,
       callback?: BodyResponseCallback<Schema$PopSettings>):
       void|AxiosPromise<Schema$PopSettings> {
@@ -2668,14 +2684,14 @@ export class Resource$Users$Settings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getVacation(params: any, options?: MethodOptions):
+  getVacation(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$VacationSettings>;
   getVacation(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$VacationSettings>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$VacationSettings>,
       callback?: BodyResponseCallback<Schema$VacationSettings>): void;
   getVacation(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$VacationSettings>,
       callback?: BodyResponseCallback<Schema$VacationSettings>):
       void|AxiosPromise<Schema$VacationSettings> {
@@ -2726,14 +2742,14 @@ export class Resource$Users$Settings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  updateAutoForwarding(params: any, options?: MethodOptions):
+  updateAutoForwarding(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AutoForwarding>;
   updateAutoForwarding(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AutoForwarding>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AutoForwarding>,
       callback?: BodyResponseCallback<Schema$AutoForwarding>): void;
   updateAutoForwarding(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AutoForwarding>,
       callback?: BodyResponseCallback<Schema$AutoForwarding>):
       void|AxiosPromise<Schema$AutoForwarding> {
@@ -2781,14 +2797,14 @@ export class Resource$Users$Settings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  updateImap(params: any, options?: MethodOptions):
+  updateImap(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ImapSettings>;
   updateImap(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ImapSettings>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ImapSettings>,
       callback?: BodyResponseCallback<Schema$ImapSettings>): void;
   updateImap(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ImapSettings>,
       callback?: BodyResponseCallback<Schema$ImapSettings>):
       void|AxiosPromise<Schema$ImapSettings> {
@@ -2836,14 +2852,14 @@ export class Resource$Users$Settings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  updatePop(params: any, options?: MethodOptions):
+  updatePop(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PopSettings>;
   updatePop(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PopSettings>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PopSettings>,
       callback?: BodyResponseCallback<Schema$PopSettings>): void;
   updatePop(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PopSettings>,
       callback?: BodyResponseCallback<Schema$PopSettings>):
       void|AxiosPromise<Schema$PopSettings> {
@@ -2891,14 +2907,14 @@ export class Resource$Users$Settings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  updateVacation(params: any, options?: MethodOptions):
+  updateVacation(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$VacationSettings>;
   updateVacation(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$VacationSettings>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$VacationSettings>,
       callback?: BodyResponseCallback<Schema$VacationSettings>): void;
   updateVacation(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$VacationSettings>,
       callback?: BodyResponseCallback<Schema$VacationSettings>):
       void|AxiosPromise<Schema$VacationSettings> {
@@ -2957,12 +2973,12 @@ export class Resource$Users$Settings$Filters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Filter>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Filter>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Filter>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Filter>,
       callback?: BodyResponseCallback<Schema$Filter>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Filter>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Filter>,
       callback?: BodyResponseCallback<Schema$Filter>):
       void|AxiosPromise<Schema$Filter> {
     if (typeof options === 'function') {
@@ -3009,12 +3025,12 @@ export class Resource$Users$Settings$Filters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -3060,10 +3076,10 @@ export class Resource$Users$Settings$Filters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Filter>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Filter>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Filter>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Filter>,
       callback?: BodyResponseCallback<Schema$Filter>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Filter>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Filter>,
       callback?: BodyResponseCallback<Schema$Filter>):
       void|AxiosPromise<Schema$Filter> {
     if (typeof options === 'function') {
@@ -3109,14 +3125,14 @@ export class Resource$Users$Settings$Filters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListFiltersResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListFiltersResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListFiltersResponse>,
       callback?: BodyResponseCallback<Schema$ListFiltersResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListFiltersResponse>,
       callback?: BodyResponseCallback<Schema$ListFiltersResponse>):
       void|AxiosPromise<Schema$ListFiltersResponse> {
@@ -3180,14 +3196,14 @@ export class Resource$Users$Settings$Forwardingaddresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ForwardingAddress>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ForwardingAddress>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ForwardingAddress>,
       callback?: BodyResponseCallback<Schema$ForwardingAddress>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ForwardingAddress>,
       callback?: BodyResponseCallback<Schema$ForwardingAddress>):
       void|AxiosPromise<Schema$ForwardingAddress> {
@@ -3238,12 +3254,12 @@ export class Resource$Users$Settings$Forwardingaddresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -3291,12 +3307,12 @@ export class Resource$Users$Settings$Forwardingaddresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$ForwardingAddress>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ForwardingAddress>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ForwardingAddress>,
       callback?: BodyResponseCallback<Schema$ForwardingAddress>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ForwardingAddress>,
       callback?: BodyResponseCallback<Schema$ForwardingAddress>):
       void|AxiosPromise<Schema$ForwardingAddress> {
@@ -3345,16 +3361,16 @@ export class Resource$Users$Settings$Forwardingaddresses {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListForwardingAddressesResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListForwardingAddressesResponse>,
       callback?: BodyResponseCallback<Schema$ListForwardingAddressesResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListForwardingAddressesResponse>,
       callback?: BodyResponseCallback<Schema$ListForwardingAddressesResponse>):
@@ -3428,12 +3444,12 @@ export class Resource$Users$Settings$Sendas {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$SendAs>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$SendAs>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$SendAs>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$SendAs>,
       callback?: BodyResponseCallback<Schema$SendAs>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$SendAs>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$SendAs>,
       callback?: BodyResponseCallback<Schema$SendAs>):
       void|AxiosPromise<Schema$SendAs> {
     if (typeof options === 'function') {
@@ -3482,12 +3498,12 @@ export class Resource$Users$Settings$Sendas {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -3535,10 +3551,10 @@ export class Resource$Users$Settings$Sendas {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$SendAs>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$SendAs>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$SendAs>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$SendAs>,
       callback?: BodyResponseCallback<Schema$SendAs>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$SendAs>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$SendAs>,
       callback?: BodyResponseCallback<Schema$SendAs>):
       void|AxiosPromise<Schema$SendAs> {
     if (typeof options === 'function') {
@@ -3587,14 +3603,14 @@ export class Resource$Users$Settings$Sendas {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListSendAsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListSendAsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListSendAsResponse>,
       callback?: BodyResponseCallback<Schema$ListSendAsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListSendAsResponse>,
       callback?: BodyResponseCallback<Schema$ListSendAsResponse>):
       void|AxiosPromise<Schema$ListSendAsResponse> {
@@ -3647,12 +3663,12 @@ export class Resource$Users$Settings$Sendas {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$SendAs>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$SendAs>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$SendAs>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$SendAs>,
       callback?: BodyResponseCallback<Schema$SendAs>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$SendAs>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$SendAs>,
       callback?: BodyResponseCallback<Schema$SendAs>):
       void|AxiosPromise<Schema$SendAs> {
     if (typeof options === 'function') {
@@ -3704,12 +3720,12 @@ export class Resource$Users$Settings$Sendas {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$SendAs>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$SendAs>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$SendAs>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$SendAs>,
       callback?: BodyResponseCallback<Schema$SendAs>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$SendAs>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$SendAs>,
       callback?: BodyResponseCallback<Schema$SendAs>):
       void|AxiosPromise<Schema$SendAs> {
     if (typeof options === 'function') {
@@ -3759,12 +3775,12 @@ export class Resource$Users$Settings$Sendas {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  verify(params: any, options?: MethodOptions): AxiosPromise<void>;
+  verify(params?: any, options?: MethodOptions): AxiosPromise<void>;
   verify(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   verify(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -3824,12 +3840,12 @@ export class Resource$Users$Settings$Sendas$Smimeinfo {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -3878,11 +3894,11 @@ export class Resource$Users$Settings$Sendas$Smimeinfo {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$SmimeInfo>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SmimeInfo>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$SmimeInfo>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SmimeInfo>,
       callback?: BodyResponseCallback<Schema$SmimeInfo>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SmimeInfo>,
       callback?: BodyResponseCallback<Schema$SmimeInfo>):
       void|AxiosPromise<Schema$SmimeInfo> {
@@ -3934,13 +3950,13 @@ export class Resource$Users$Settings$Sendas$Smimeinfo {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$SmimeInfo>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$SmimeInfo>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SmimeInfo>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SmimeInfo>,
       callback?: BodyResponseCallback<Schema$SmimeInfo>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SmimeInfo>,
       callback?: BodyResponseCallback<Schema$SmimeInfo>):
       void|AxiosPromise<Schema$SmimeInfo> {
@@ -3990,14 +4006,15 @@ export class Resource$Users$Settings$Sendas$Smimeinfo {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListSmimeInfoResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListSmimeInfoResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ListSmimeInfoResponse>,
       callback?: BodyResponseCallback<Schema$ListSmimeInfoResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListSmimeInfoResponse>,
       callback?: BodyResponseCallback<Schema$ListSmimeInfoResponse>):
@@ -4049,12 +4066,12 @@ export class Resource$Users$Settings$Sendas$Smimeinfo {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setDefault(params: any, options?: MethodOptions): AxiosPromise<void>;
+  setDefault(params?: any, options?: MethodOptions): AxiosPromise<void>;
   setDefault(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   setDefault(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -4117,12 +4134,12 @@ export class Resource$Users$Threads {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -4170,10 +4187,10 @@ export class Resource$Users$Threads {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Thread>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Thread>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Thread>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Thread>,
       callback?: BodyResponseCallback<Schema$Thread>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Thread>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Thread>,
       callback?: BodyResponseCallback<Schema$Thread>):
       void|AxiosPromise<Schema$Thread> {
     if (typeof options === 'function') {
@@ -4224,14 +4241,14 @@ export class Resource$Users$Threads {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListThreadsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListThreadsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListThreadsResponse>,
       callback?: BodyResponseCallback<Schema$ListThreadsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListThreadsResponse>,
       callback?: BodyResponseCallback<Schema$ListThreadsResponse>):
       void|AxiosPromise<Schema$ListThreadsResponse> {
@@ -4281,12 +4298,12 @@ export class Resource$Users$Threads {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  modify(params: any, options?: MethodOptions): AxiosPromise<Schema$Thread>;
+  modify(params?: any, options?: MethodOptions): AxiosPromise<Schema$Thread>;
   modify(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Thread>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Thread>,
       callback?: BodyResponseCallback<Schema$Thread>): void;
   modify(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Thread>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Thread>,
       callback?: BodyResponseCallback<Schema$Thread>):
       void|AxiosPromise<Schema$Thread> {
     if (typeof options === 'function') {
@@ -4333,12 +4350,12 @@ export class Resource$Users$Threads {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  trash(params: any, options?: MethodOptions): AxiosPromise<Schema$Thread>;
+  trash(params?: any, options?: MethodOptions): AxiosPromise<Schema$Thread>;
   trash(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Thread>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Thread>,
       callback?: BodyResponseCallback<Schema$Thread>): void;
   trash(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Thread>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Thread>,
       callback?: BodyResponseCallback<Schema$Thread>):
       void|AxiosPromise<Schema$Thread> {
     if (typeof options === 'function') {
@@ -4385,12 +4402,12 @@ export class Resource$Users$Threads {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  untrash(params: any, options?: MethodOptions): AxiosPromise<Schema$Thread>;
+  untrash(params?: any, options?: MethodOptions): AxiosPromise<Schema$Thread>;
   untrash(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Thread>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Thread>,
       callback?: BodyResponseCallback<Schema$Thread>): void;
   untrash(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Thread>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Thread>,
       callback?: BodyResponseCallback<Schema$Thread>):
       void|AxiosPromise<Schema$Thread> {
     if (typeof options === 'function') {
diff --git a/src/apis/groupsmigration/v1.ts b/src/apis/groupsmigration/v1.ts
index 55efb62b95..a820cc1eda 100644
--- a/src/apis/groupsmigration/v1.ts
+++ b/src/apis/groupsmigration/v1.ts
@@ -104,12 +104,12 @@ export class Resource$Archive {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Groups>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Groups>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Groups>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Groups>,
       callback?: BodyResponseCallback<Schema$Groups>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Groups>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Groups>,
       callback?: BodyResponseCallback<Schema$Groups>):
       void|AxiosPromise<Schema$Groups> {
     if (typeof options === 'function') {
diff --git a/src/apis/groupssettings/v1.ts b/src/apis/groupssettings/v1.ts
index f176a4cba7..54d70ec4f4 100644
--- a/src/apis/groupssettings/v1.ts
+++ b/src/apis/groupssettings/v1.ts
@@ -232,10 +232,10 @@ export class Resource$Groups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Groups>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Groups>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Groups>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Groups>,
       callback?: BodyResponseCallback<Schema$Groups>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Groups>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Groups>,
       callback?: BodyResponseCallback<Schema$Groups>):
       void|AxiosPromise<Schema$Groups> {
     if (typeof options === 'function') {
@@ -282,12 +282,12 @@ export class Resource$Groups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Groups>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Groups>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Groups>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Groups>,
       callback?: BodyResponseCallback<Schema$Groups>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Groups>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Groups>,
       callback?: BodyResponseCallback<Schema$Groups>):
       void|AxiosPromise<Schema$Groups> {
     if (typeof options === 'function') {
@@ -334,12 +334,12 @@ export class Resource$Groups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Groups>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Groups>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Groups>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Groups>,
       callback?: BodyResponseCallback<Schema$Groups>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Groups>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Groups>,
       callback?: BodyResponseCallback<Schema$Groups>):
       void|AxiosPromise<Schema$Groups> {
     if (typeof options === 'function') {
diff --git a/src/apis/iam/v1.ts b/src/apis/iam/v1.ts
index 2d0d27732d..12a447443c 100644
--- a/src/apis/iam/v1.ts
+++ b/src/apis/iam/v1.ts
@@ -727,16 +727,16 @@ export class Resource$Iampolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  queryAuditableServices(params: any, options?: MethodOptions):
+  queryAuditableServices(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$QueryAuditableServicesResponse>;
   queryAuditableServices(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$QueryAuditableServicesResponse>,
       callback?: BodyResponseCallback<Schema$QueryAuditableServicesResponse>):
       void;
   queryAuditableServices(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$QueryAuditableServicesResponse>,
       callback?: BodyResponseCallback<Schema$QueryAuditableServicesResponse>):
@@ -812,12 +812,12 @@ export class Resource$Organizations$Roles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Role>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Role>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Role>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
       callback?: BodyResponseCallback<Schema$Role>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
       callback?: BodyResponseCallback<Schema$Role>):
       void|AxiosPromise<Schema$Role> {
     if (typeof options === 'function') {
@@ -868,12 +868,12 @@ export class Resource$Organizations$Roles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Role>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Role>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Role>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
       callback?: BodyResponseCallback<Schema$Role>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
       callback?: BodyResponseCallback<Schema$Role>):
       void|AxiosPromise<Schema$Role> {
     if (typeof options === 'function') {
@@ -918,10 +918,10 @@ export class Resource$Organizations$Roles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Role>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Role>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Role>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
       callback?: BodyResponseCallback<Schema$Role>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
       callback?: BodyResponseCallback<Schema$Role>):
       void|AxiosPromise<Schema$Role> {
     if (typeof options === 'function') {
@@ -970,14 +970,14 @@ export class Resource$Organizations$Roles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListRolesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListRolesResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListRolesResponse>,
       callback?: BodyResponseCallback<Schema$ListRolesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListRolesResponse>,
       callback?: BodyResponseCallback<Schema$ListRolesResponse>):
       void|AxiosPromise<Schema$ListRolesResponse> {
@@ -1025,12 +1025,12 @@ export class Resource$Organizations$Roles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Role>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Role>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Role>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
       callback?: BodyResponseCallback<Schema$Role>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
       callback?: BodyResponseCallback<Schema$Role>):
       void|AxiosPromise<Schema$Role> {
     if (typeof options === 'function') {
@@ -1076,12 +1076,12 @@ export class Resource$Organizations$Roles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  undelete(params: any, options?: MethodOptions): AxiosPromise<Schema$Role>;
+  undelete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Role>;
   undelete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Role>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
       callback?: BodyResponseCallback<Schema$Role>): void;
   undelete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
       callback?: BodyResponseCallback<Schema$Role>):
       void|AxiosPromise<Schema$Role> {
     if (typeof options === 'function') {
@@ -1141,16 +1141,16 @@ export class Resource$Permissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  queryTestablePermissions(params: any, options?: MethodOptions):
+  queryTestablePermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$QueryTestablePermissionsResponse>;
   queryTestablePermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$QueryTestablePermissionsResponse>,
       callback?: BodyResponseCallback<Schema$QueryTestablePermissionsResponse>):
       void;
   queryTestablePermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$QueryTestablePermissionsResponse>,
       callback?: BodyResponseCallback<Schema$QueryTestablePermissionsResponse>):
@@ -1228,12 +1228,12 @@ export class Resource$Projects$Roles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Role>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Role>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Role>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
       callback?: BodyResponseCallback<Schema$Role>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
       callback?: BodyResponseCallback<Schema$Role>):
       void|AxiosPromise<Schema$Role> {
     if (typeof options === 'function') {
@@ -1284,12 +1284,12 @@ export class Resource$Projects$Roles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Role>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Role>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Role>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
       callback?: BodyResponseCallback<Schema$Role>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
       callback?: BodyResponseCallback<Schema$Role>):
       void|AxiosPromise<Schema$Role> {
     if (typeof options === 'function') {
@@ -1334,10 +1334,10 @@ export class Resource$Projects$Roles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Role>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Role>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Role>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
       callback?: BodyResponseCallback<Schema$Role>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
       callback?: BodyResponseCallback<Schema$Role>):
       void|AxiosPromise<Schema$Role> {
     if (typeof options === 'function') {
@@ -1386,14 +1386,14 @@ export class Resource$Projects$Roles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListRolesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListRolesResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListRolesResponse>,
       callback?: BodyResponseCallback<Schema$ListRolesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListRolesResponse>,
       callback?: BodyResponseCallback<Schema$ListRolesResponse>):
       void|AxiosPromise<Schema$ListRolesResponse> {
@@ -1441,12 +1441,12 @@ export class Resource$Projects$Roles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Role>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Role>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Role>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
       callback?: BodyResponseCallback<Schema$Role>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
       callback?: BodyResponseCallback<Schema$Role>):
       void|AxiosPromise<Schema$Role> {
     if (typeof options === 'function') {
@@ -1492,12 +1492,12 @@ export class Resource$Projects$Roles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  undelete(params: any, options?: MethodOptions): AxiosPromise<Schema$Role>;
+  undelete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Role>;
   undelete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Role>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
       callback?: BodyResponseCallback<Schema$Role>): void;
   undelete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
       callback?: BodyResponseCallback<Schema$Role>):
       void|AxiosPromise<Schema$Role> {
     if (typeof options === 'function') {
@@ -1558,14 +1558,14 @@ export class Resource$Projects$Serviceaccounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ServiceAccount>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ServiceAccount>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ServiceAccount>,
       callback?: BodyResponseCallback<Schema$ServiceAccount>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ServiceAccount>,
       callback?: BodyResponseCallback<Schema$ServiceAccount>):
       void|AxiosPromise<Schema$ServiceAccount> {
@@ -1612,12 +1612,12 @@ export class Resource$Projects$Serviceaccounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1662,12 +1662,12 @@ export class Resource$Projects$Serviceaccounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$ServiceAccount>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ServiceAccount>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ServiceAccount>,
       callback?: BodyResponseCallback<Schema$ServiceAccount>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ServiceAccount>,
       callback?: BodyResponseCallback<Schema$ServiceAccount>):
       void|AxiosPromise<Schema$ServiceAccount> {
@@ -1713,13 +1713,13 @@ export class Resource$Projects$Serviceaccounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -1767,16 +1767,16 @@ export class Resource$Projects$Serviceaccounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListServiceAccountsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListServiceAccountsResponse>,
       callback?: BodyResponseCallback<Schema$ListServiceAccountsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListServiceAccountsResponse>,
       callback?: BodyResponseCallback<Schema$ListServiceAccountsResponse>):
@@ -1826,13 +1826,13 @@ export class Resource$Projects$Serviceaccounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -1879,14 +1879,14 @@ export class Resource$Projects$Serviceaccounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  signBlob(params: any, options?: MethodOptions):
+  signBlob(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SignBlobResponse>;
   signBlob(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SignBlobResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SignBlobResponse>,
       callback?: BodyResponseCallback<Schema$SignBlobResponse>): void;
   signBlob(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SignBlobResponse>,
       callback?: BodyResponseCallback<Schema$SignBlobResponse>):
       void|AxiosPromise<Schema$SignBlobResponse> {
@@ -1937,14 +1937,14 @@ export class Resource$Projects$Serviceaccounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  signJwt(params: any, options?: MethodOptions):
+  signJwt(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SignJwtResponse>;
   signJwt(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SignJwtResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SignJwtResponse>,
       callback?: BodyResponseCallback<Schema$SignJwtResponse>): void;
   signJwt(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SignJwtResponse>,
       callback?: BodyResponseCallback<Schema$SignJwtResponse>):
       void|AxiosPromise<Schema$SignJwtResponse> {
@@ -1992,15 +1992,15 @@ export class Resource$Projects$Serviceaccounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestIamPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>):
@@ -2050,14 +2050,14 @@ export class Resource$Projects$Serviceaccounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ServiceAccount>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ServiceAccount>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ServiceAccount>,
       callback?: BodyResponseCallback<Schema$ServiceAccount>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ServiceAccount>,
       callback?: BodyResponseCallback<Schema$ServiceAccount>):
       void|AxiosPromise<Schema$ServiceAccount> {
@@ -2115,14 +2115,14 @@ export class Resource$Projects$Serviceaccounts$Keys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ServiceAccountKey>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ServiceAccountKey>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ServiceAccountKey>,
       callback?: BodyResponseCallback<Schema$ServiceAccountKey>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ServiceAccountKey>,
       callback?: BodyResponseCallback<Schema$ServiceAccountKey>):
       void|AxiosPromise<Schema$ServiceAccountKey> {
@@ -2168,12 +2168,12 @@ export class Resource$Projects$Serviceaccounts$Keys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2219,12 +2219,12 @@ export class Resource$Projects$Serviceaccounts$Keys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$ServiceAccountKey>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ServiceAccountKey>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ServiceAccountKey>,
       callback?: BodyResponseCallback<Schema$ServiceAccountKey>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ServiceAccountKey>,
       callback?: BodyResponseCallback<Schema$ServiceAccountKey>):
       void|AxiosPromise<Schema$ServiceAccountKey> {
@@ -2271,16 +2271,16 @@ export class Resource$Projects$Serviceaccounts$Keys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListServiceAccountKeysResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListServiceAccountKeysResponse>,
       callback?: BodyResponseCallback<Schema$ListServiceAccountKeysResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListServiceAccountKeysResponse>,
       callback?: BodyResponseCallback<Schema$ListServiceAccountKeysResponse>):
@@ -2343,10 +2343,10 @@ export class Resource$Roles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Role>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Role>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Role>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
       callback?: BodyResponseCallback<Schema$Role>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Role>,
       callback?: BodyResponseCallback<Schema$Role>):
       void|AxiosPromise<Schema$Role> {
     if (typeof options === 'function') {
@@ -2395,14 +2395,14 @@ export class Resource$Roles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListRolesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListRolesResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListRolesResponse>,
       callback?: BodyResponseCallback<Schema$ListRolesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListRolesResponse>,
       callback?: BodyResponseCallback<Schema$ListRolesResponse>):
       void|AxiosPromise<Schema$ListRolesResponse> {
@@ -2450,16 +2450,16 @@ export class Resource$Roles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  queryGrantableRoles(params: any, options?: MethodOptions):
+  queryGrantableRoles(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$QueryGrantableRolesResponse>;
   queryGrantableRoles(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$QueryGrantableRolesResponse>,
       callback?: BodyResponseCallback<Schema$QueryGrantableRolesResponse>):
       void;
   queryGrantableRoles(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$QueryGrantableRolesResponse>,
       callback?: BodyResponseCallback<Schema$QueryGrantableRolesResponse>):
diff --git a/src/apis/identitytoolkit/v3.ts b/src/apis/identitytoolkit/v3.ts
index 68be0eb166..f9c5481674 100644
--- a/src/apis/identitytoolkit/v3.ts
+++ b/src/apis/identitytoolkit/v3.ts
@@ -1530,14 +1530,15 @@ export class Resource$Relyingparty {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  createAuthUri(params: any, options?: MethodOptions):
+  createAuthUri(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreateAuthUriResponse>;
   createAuthUri(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CreateAuthUriResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$CreateAuthUriResponse>,
       callback?: BodyResponseCallback<Schema$CreateAuthUriResponse>): void;
   createAuthUri(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$CreateAuthUriResponse>,
       callback?: BodyResponseCallback<Schema$CreateAuthUriResponse>):
@@ -1585,14 +1586,15 @@ export class Resource$Relyingparty {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  deleteAccount(params: any, options?: MethodOptions):
+  deleteAccount(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DeleteAccountResponse>;
   deleteAccount(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DeleteAccountResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$DeleteAccountResponse>,
       callback?: BodyResponseCallback<Schema$DeleteAccountResponse>): void;
   deleteAccount(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$DeleteAccountResponse>,
       callback?: BodyResponseCallback<Schema$DeleteAccountResponse>):
@@ -1640,15 +1642,15 @@ export class Resource$Relyingparty {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  downloadAccount(params: any, options?: MethodOptions):
+  downloadAccount(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DownloadAccountResponse>;
   downloadAccount(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$DownloadAccountResponse>,
       callback?: BodyResponseCallback<Schema$DownloadAccountResponse>): void;
   downloadAccount(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$DownloadAccountResponse>,
       callback?: BodyResponseCallback<Schema$DownloadAccountResponse>):
@@ -1696,15 +1698,15 @@ export class Resource$Relyingparty {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  emailLinkSignin(params: any, options?: MethodOptions):
+  emailLinkSignin(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$EmailLinkSigninResponse>;
   emailLinkSignin(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$EmailLinkSigninResponse>,
       callback?: BodyResponseCallback<Schema$EmailLinkSigninResponse>): void;
   emailLinkSignin(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$EmailLinkSigninResponse>,
       callback?: BodyResponseCallback<Schema$EmailLinkSigninResponse>):
@@ -1752,15 +1754,15 @@ export class Resource$Relyingparty {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getAccountInfo(params: any, options?: MethodOptions):
+  getAccountInfo(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GetAccountInfoResponse>;
   getAccountInfo(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GetAccountInfoResponse>,
       callback?: BodyResponseCallback<Schema$GetAccountInfoResponse>): void;
   getAccountInfo(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GetAccountInfoResponse>,
       callback?: BodyResponseCallback<Schema$GetAccountInfoResponse>):
@@ -1808,16 +1810,16 @@ export class Resource$Relyingparty {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getOobConfirmationCode(params: any, options?: MethodOptions):
+  getOobConfirmationCode(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GetOobConfirmationCodeResponse>;
   getOobConfirmationCode(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GetOobConfirmationCodeResponse>,
       callback?: BodyResponseCallback<Schema$GetOobConfirmationCodeResponse>):
       void;
   getOobConfirmationCode(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GetOobConfirmationCodeResponse>,
       callback?: BodyResponseCallback<Schema$GetOobConfirmationCodeResponse>):
@@ -1869,16 +1871,16 @@ export class Resource$Relyingparty {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getProjectConfig(params: any, options?: MethodOptions):
+  getProjectConfig(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$IdentitytoolkitRelyingpartyGetProjectConfigResponse>;
   getProjectConfig(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$IdentitytoolkitRelyingpartyGetProjectConfigResponse>,
       callback?: BodyResponseCallback<
           Schema$IdentitytoolkitRelyingpartyGetProjectConfigResponse>): void;
   getProjectConfig(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$IdentitytoolkitRelyingpartyGetProjectConfigResponse>,
       callback?: BodyResponseCallback<
@@ -1930,16 +1932,16 @@ export class Resource$Relyingparty {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getPublicKeys(params: any, options?: MethodOptions):
+  getPublicKeys(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$IdentitytoolkitRelyingpartyGetPublicKeysResponse>;
   getPublicKeys(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$IdentitytoolkitRelyingpartyGetPublicKeysResponse>,
       callback?: BodyResponseCallback<
           Schema$IdentitytoolkitRelyingpartyGetPublicKeysResponse>): void;
   getPublicKeys(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$IdentitytoolkitRelyingpartyGetPublicKeysResponse>,
       callback?: BodyResponseCallback<
@@ -1989,15 +1991,15 @@ export class Resource$Relyingparty {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getRecaptchaParam(params: any, options?: MethodOptions):
+  getRecaptchaParam(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GetRecaptchaParamResponse>;
   getRecaptchaParam(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GetRecaptchaParamResponse>,
       callback?: BodyResponseCallback<Schema$GetRecaptchaParamResponse>): void;
   getRecaptchaParam(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GetRecaptchaParamResponse>,
       callback?: BodyResponseCallback<Schema$GetRecaptchaParamResponse>):
@@ -2046,14 +2048,15 @@ export class Resource$Relyingparty {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resetPassword(params: any, options?: MethodOptions):
+  resetPassword(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ResetPasswordResponse>;
   resetPassword(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ResetPasswordResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ResetPasswordResponse>,
       callback?: BodyResponseCallback<Schema$ResetPasswordResponse>): void;
   resetPassword(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ResetPasswordResponse>,
       callback?: BodyResponseCallback<Schema$ResetPasswordResponse>):
@@ -2101,17 +2104,17 @@ export class Resource$Relyingparty {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  sendVerificationCode(params: any, options?: MethodOptions): AxiosPromise<
+  sendVerificationCode(params?: any, options?: MethodOptions): AxiosPromise<
       Schema$IdentitytoolkitRelyingpartySendVerificationCodeResponse>;
   sendVerificationCode(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$IdentitytoolkitRelyingpartySendVerificationCodeResponse>,
       callback?: BodyResponseCallback<
           Schema$IdentitytoolkitRelyingpartySendVerificationCodeResponse>):
       void;
   sendVerificationCode(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$IdentitytoolkitRelyingpartySendVerificationCodeResponse>,
       callback?: BodyResponseCallback<
@@ -2166,15 +2169,15 @@ export class Resource$Relyingparty {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setAccountInfo(params: any, options?: MethodOptions):
+  setAccountInfo(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SetAccountInfoResponse>;
   setAccountInfo(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SetAccountInfoResponse>,
       callback?: BodyResponseCallback<Schema$SetAccountInfoResponse>): void;
   setAccountInfo(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SetAccountInfoResponse>,
       callback?: BodyResponseCallback<Schema$SetAccountInfoResponse>):
@@ -2222,16 +2225,16 @@ export class Resource$Relyingparty {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setProjectConfig(params: any, options?: MethodOptions):
+  setProjectConfig(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$IdentitytoolkitRelyingpartySetProjectConfigResponse>;
   setProjectConfig(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$IdentitytoolkitRelyingpartySetProjectConfigResponse>,
       callback?: BodyResponseCallback<
           Schema$IdentitytoolkitRelyingpartySetProjectConfigResponse>): void;
   setProjectConfig(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$IdentitytoolkitRelyingpartySetProjectConfigResponse>,
       callback?: BodyResponseCallback<
@@ -2284,16 +2287,16 @@ export class Resource$Relyingparty {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  signOutUser(params: any, options?: MethodOptions):
+  signOutUser(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$IdentitytoolkitRelyingpartySignOutUserResponse>;
   signOutUser(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$IdentitytoolkitRelyingpartySignOutUserResponse>,
       callback?: BodyResponseCallback<
           Schema$IdentitytoolkitRelyingpartySignOutUserResponse>): void;
   signOutUser(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$IdentitytoolkitRelyingpartySignOutUserResponse>,
       callback?: BodyResponseCallback<
@@ -2344,14 +2347,15 @@ export class Resource$Relyingparty {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  signupNewUser(params: any, options?: MethodOptions):
+  signupNewUser(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SignupNewUserResponse>;
   signupNewUser(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SignupNewUserResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$SignupNewUserResponse>,
       callback?: BodyResponseCallback<Schema$SignupNewUserResponse>): void;
   signupNewUser(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SignupNewUserResponse>,
       callback?: BodyResponseCallback<Schema$SignupNewUserResponse>):
@@ -2399,14 +2403,15 @@ export class Resource$Relyingparty {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  uploadAccount(params: any, options?: MethodOptions):
+  uploadAccount(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$UploadAccountResponse>;
   uploadAccount(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UploadAccountResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$UploadAccountResponse>,
       callback?: BodyResponseCallback<Schema$UploadAccountResponse>): void;
   uploadAccount(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$UploadAccountResponse>,
       callback?: BodyResponseCallback<Schema$UploadAccountResponse>):
@@ -2454,15 +2459,15 @@ export class Resource$Relyingparty {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  verifyAssertion(params: any, options?: MethodOptions):
+  verifyAssertion(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$VerifyAssertionResponse>;
   verifyAssertion(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$VerifyAssertionResponse>,
       callback?: BodyResponseCallback<Schema$VerifyAssertionResponse>): void;
   verifyAssertion(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$VerifyAssertionResponse>,
       callback?: BodyResponseCallback<Schema$VerifyAssertionResponse>):
@@ -2510,15 +2515,15 @@ export class Resource$Relyingparty {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  verifyCustomToken(params: any, options?: MethodOptions):
+  verifyCustomToken(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$VerifyCustomTokenResponse>;
   verifyCustomToken(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$VerifyCustomTokenResponse>,
       callback?: BodyResponseCallback<Schema$VerifyCustomTokenResponse>): void;
   verifyCustomToken(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$VerifyCustomTokenResponse>,
       callback?: BodyResponseCallback<Schema$VerifyCustomTokenResponse>):
@@ -2567,15 +2572,15 @@ export class Resource$Relyingparty {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  verifyPassword(params: any, options?: MethodOptions):
+  verifyPassword(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$VerifyPasswordResponse>;
   verifyPassword(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$VerifyPasswordResponse>,
       callback?: BodyResponseCallback<Schema$VerifyPasswordResponse>): void;
   verifyPassword(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$VerifyPasswordResponse>,
       callback?: BodyResponseCallback<Schema$VerifyPasswordResponse>):
@@ -2624,16 +2629,16 @@ export class Resource$Relyingparty {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  verifyPhoneNumber(params: any, options?: MethodOptions):
+  verifyPhoneNumber(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$IdentitytoolkitRelyingpartyVerifyPhoneNumberResponse>;
   verifyPhoneNumber(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$IdentitytoolkitRelyingpartyVerifyPhoneNumberResponse>,
       callback?: BodyResponseCallback<
           Schema$IdentitytoolkitRelyingpartyVerifyPhoneNumberResponse>): void;
   verifyPhoneNumber(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$IdentitytoolkitRelyingpartyVerifyPhoneNumberResponse>,
       callback?: BodyResponseCallback<
diff --git a/src/apis/index.ts b/src/apis/index.ts
index e1bab9cfe8..9ea9f734ca 100644
--- a/src/apis/index.ts
+++ b/src/apis/index.ts
@@ -41,7 +41,6 @@ import * as androidenterprise_v1 from './androidenterprise/v1';
 import * as androidmanagement_v1 from './androidmanagement/v1';
 import * as androidpublisher_v1 from './androidpublisher/v1';
 import * as androidpublisher_v1_1 from './androidpublisher/v1.1';
-import * as androidpublisher_v2 from './androidpublisher/v2';
 import * as appengine_v1 from './appengine/v1';
 import * as appengine_v1alpha from './appengine/v1alpha';
 import * as appengine_v1beta from './appengine/v1beta';
@@ -272,7 +271,6 @@ const APIS: APIList = {
   androidpublisher: {
     'v1.1': androidpublisher_v1_1.Androidpublisher,
     'v1': androidpublisher_v1.Androidpublisher,
-    'v2': androidpublisher_v2.Androidpublisher,
   },
   appengine: {
     'v1': appengine_v1.Appengine,
@@ -678,7 +676,8 @@ const APIS: APIList = {
 };
 
 export class GeneratedAPIs {
-  private getAPI(api: string, options: ServiceOptions|string) {
+  // tslint:disable-next-line no-any
+  private getAPI<T = any>(api: string, options: ServiceOptions|string) {
     let version: string;
     if (typeof options === 'string') {
       version = options;
@@ -692,401 +691,535 @@ export class GeneratedAPIs {
     try {
       const endpoint = APIS[api][path.basename(version)];
       const ep = new endpoint(options, this);
-      return Object.freeze(ep);  // create new & freeze
+      return Object.freeze(ep) as T;
     } catch (e) {
       throw new Error(
           `Unable to load endpoint ${api}("${version}"): ${e.message}`);
     }
   }
 
-  abusiveexperiencereport(options: ServiceOptions|string) {
-    return this.getAPI('abusiveexperiencereport', options);
+  abusiveexperiencereport<
+      T = abusiveexperiencereport_v1.Abusiveexperiencereport>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('abusiveexperiencereport', options);
+  }
+  acceleratedmobilepageurl<
+      T = acceleratedmobilepageurl_v1.Acceleratedmobilepageurl>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('acceleratedmobilepageurl', options);
+  }
+  adexchangebuyer<
+      T = adexchangebuyer_v1_2.Adexchangebuyer |
+          adexchangebuyer_v1_3.Adexchangebuyer |
+          adexchangebuyer_v1_4.Adexchangebuyer>(options: ServiceOptions|
+                                                string) {
+    return this.getAPI<T>('adexchangebuyer', options);
+  }
+  adexchangebuyer2<T = adexchangebuyer2_v2beta1.Adexchangebuyer2>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('adexchangebuyer2', options);
+  }
+  adexchangeseller<
+      T = adexchangeseller_v1_1.Adexchangeseller |
+          adexchangeseller_v1.Adexchangeseller |
+          adexchangeseller_v2_0.Adexchangeseller>(options: ServiceOptions|
+                                                  string) {
+    return this.getAPI<T>('adexchangeseller', options);
+  }
+  adexperiencereport<T = adexperiencereport_v1.Adexperiencereport>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('adexperiencereport', options);
+  }
+  admin<
+      T = admin_datatransfer_v1.Admin | admin_directory_v1.Admin |
+          admin_reports_v1.Admin>(options: ServiceOptions|string) {
+    return this.getAPI<T>('admin', options);
+  }
+  adsense<T = adsense_v1_4.Adsense>(options: ServiceOptions|string) {
+    return this.getAPI<T>('adsense', options);
+  }
+  adsensehost<T = adsensehost_v4_1.Adsensehost>(options: ServiceOptions|
+                                                string) {
+    return this.getAPI<T>('adsensehost', options);
+  }
+  analytics<T = analytics_v2_4.Analytics | analytics_v3.Analytics>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('analytics', options);
+  }
+  analyticsreporting<T = analyticsreporting_v4.Analyticsreporting>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('analyticsreporting', options);
+  }
+  androiddeviceprovisioning<
+      T = androiddeviceprovisioning_v1.Androiddeviceprovisioning>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('androiddeviceprovisioning', options);
+  }
+  androidenterprise<T = androidenterprise_v1.Androidenterprise>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('androidenterprise', options);
+  }
+  androidmanagement<T = androidmanagement_v1.Androidmanagement>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('androidmanagement', options);
+  }
+  androidpublisher<
+      T = androidpublisher_v1_1.Androidpublisher |
+          androidpublisher_v1.Androidpublisher>(options: ServiceOptions|
+                                                string) {
+    return this.getAPI<T>('androidpublisher', options);
+  }
+  appengine<
+      T = appengine_v1.Appengine | appengine_v1alpha.Appengine |
+          appengine_v1beta.Appengine | appengine_v1beta4.Appengine |
+          appengine_v1beta5.Appengine>(options: ServiceOptions|string) {
+    return this.getAPI<T>('appengine', options);
+  }
+  appsactivity<T = appsactivity_v1.Appsactivity>(options: ServiceOptions|
+                                                 string) {
+    return this.getAPI<T>('appsactivity', options);
+  }
+  appstate<T = appstate_v1.Appstate>(options: ServiceOptions|string) {
+    return this.getAPI<T>('appstate', options);
+  }
+  bigquery<T = bigquery_v2.Bigquery>(options: ServiceOptions|string) {
+    return this.getAPI<T>('bigquery', options);
+  }
+  bigquerydatatransfer<T = bigquerydatatransfer_v1.Bigquerydatatransfer>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('bigquerydatatransfer', options);
+  }
+  blogger<T = blogger_v2.Blogger | blogger_v3.Blogger>(options: ServiceOptions|
+                                                       string) {
+    return this.getAPI<T>('blogger', options);
+  }
+  books<T = books_v1.Books>(options: ServiceOptions|string) {
+    return this.getAPI<T>('books', options);
+  }
+  calendar<T = calendar_v3.Calendar>(options: ServiceOptions|string) {
+    return this.getAPI<T>('calendar', options);
+  }
+  chat<T = chat_v1.Chat>(options: ServiceOptions|string) {
+    return this.getAPI<T>('chat', options);
+  }
+  civicinfo<T = civicinfo_v2.Civicinfo>(options: ServiceOptions|string) {
+    return this.getAPI<T>('civicinfo', options);
+  }
+  classroom<T = classroom_v1.Classroom>(options: ServiceOptions|string) {
+    return this.getAPI<T>('classroom', options);
+  }
+  cloudbilling<T = cloudbilling_v1.Cloudbilling>(options: ServiceOptions|
+                                                 string) {
+    return this.getAPI<T>('cloudbilling', options);
+  }
+  cloudbuild<T = cloudbuild_v1.Cloudbuild>(options: ServiceOptions|string) {
+    return this.getAPI<T>('cloudbuild', options);
+  }
+  clouddebugger<T = clouddebugger_v2.Clouddebugger>(options: ServiceOptions|
+                                                    string) {
+    return this.getAPI<T>('clouddebugger', options);
+  }
+  clouderrorreporting<T = clouderrorreporting_v1beta1.Clouderrorreporting>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('clouderrorreporting', options);
+  }
+  cloudfunctions<
+      T = cloudfunctions_v1.Cloudfunctions |
+          cloudfunctions_v1beta2.Cloudfunctions>(options: ServiceOptions|
+                                                 string) {
+    return this.getAPI<T>('cloudfunctions', options);
+  }
+  cloudiot<T = cloudiot_v1.Cloudiot>(options: ServiceOptions|string) {
+    return this.getAPI<T>('cloudiot', options);
+  }
+  cloudkms<T = cloudkms_v1.Cloudkms>(options: ServiceOptions|string) {
+    return this.getAPI<T>('cloudkms', options);
+  }
+  cloudresourcemanager<
+      T = cloudresourcemanager_v1.Cloudresourcemanager |
+          cloudresourcemanager_v1beta1.Cloudresourcemanager |
+          cloudresourcemanager_v2.Cloudresourcemanager |
+          cloudresourcemanager_v2beta1.Cloudresourcemanager>(options:
+                                                                 ServiceOptions|
+                                                             string) {
+    return this.getAPI<T>('cloudresourcemanager', options);
+  }
+  cloudshell<T = cloudshell_v1.Cloudshell | cloudshell_v1alpha1.Cloudshell>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('cloudshell', options);
+  }
+  cloudtasks<T = cloudtasks_v2beta2.Cloudtasks>(options: ServiceOptions|
+                                                string) {
+    return this.getAPI<T>('cloudtasks', options);
+  }
+  cloudtrace<T = cloudtrace_v1.Cloudtrace | cloudtrace_v2.Cloudtrace>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('cloudtrace', options);
+  }
+  compute<
+      T = compute_alpha.Compute | compute_beta.Compute | compute_v1.Compute>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('compute', options);
+  }
+  container<T = container_v1.Container | container_v1beta1.Container>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('container', options);
+  }
+  content<T = content_v2.Content | content_v2sandbox.Content>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('content', options);
   }
-  acceleratedmobilepageurl(options: ServiceOptions|string) {
-    return this.getAPI('acceleratedmobilepageurl', options);
+  customsearch<T = customsearch_v1.Customsearch>(options: ServiceOptions|
+                                                 string) {
+    return this.getAPI<T>('customsearch', options);
   }
-  adexchangebuyer(options: ServiceOptions|string) {
-    return this.getAPI('adexchangebuyer', options);
+  dataflow<T = dataflow_v1b3.Dataflow>(options: ServiceOptions|string) {
+    return this.getAPI<T>('dataflow', options);
   }
-  adexchangebuyer2(options: ServiceOptions|string) {
-    return this.getAPI('adexchangebuyer2', options);
+  dataproc<T = dataproc_v1.Dataproc | dataproc_v1beta2.Dataproc>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('dataproc', options);
   }
-  adexchangeseller(options: ServiceOptions|string) {
-    return this.getAPI('adexchangeseller', options);
+  datastore<
+      T = datastore_v1.Datastore | datastore_v1beta1.Datastore |
+          datastore_v1beta3.Datastore>(options: ServiceOptions|string) {
+    return this.getAPI<T>('datastore', options);
   }
-  adexperiencereport(options: ServiceOptions|string) {
-    return this.getAPI('adexperiencereport', options);
+  deploymentmanager<
+      T = deploymentmanager_alpha.Deploymentmanager |
+          deploymentmanager_v2.Deploymentmanager |
+          deploymentmanager_v2beta.Deploymentmanager>(options: ServiceOptions|
+                                                      string) {
+    return this.getAPI<T>('deploymentmanager', options);
   }
-  admin(options: ServiceOptions|string) {
-    return this.getAPI('admin', options);
+  dfareporting<
+      T = dfareporting_v2_8.Dfareporting | dfareporting_v3_0.Dfareporting>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('dfareporting', options);
+  }
+  dialogflow<T = dialogflow_v2.Dialogflow | dialogflow_v2beta1.Dialogflow>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('dialogflow', options);
+  }
+  digitalassetlinks<T = digitalassetlinks_v1.Digitalassetlinks>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('digitalassetlinks', options);
+  }
+  discovery<T = discovery_v1.Discovery>(options: ServiceOptions|string) {
+    return this.getAPI<T>('discovery', options);
+  }
+  dlp<T = dlp_v2.Dlp | dlp_v2beta1.Dlp | dlp_v2beta2.Dlp>(options:
+                                                              ServiceOptions|
+                                                          string) {
+    return this.getAPI<T>('dlp', options);
+  }
+  dns<T = dns_v1.Dns | dns_v1beta2.Dns | dns_v2beta1.Dns>(options:
+                                                              ServiceOptions|
+                                                          string) {
+    return this.getAPI<T>('dns', options);
+  }
+  doubleclickbidmanager<T = doubleclickbidmanager_v1.Doubleclickbidmanager>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('doubleclickbidmanager', options);
+  }
+  doubleclicksearch<T = doubleclicksearch_v2.Doubleclicksearch>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('doubleclicksearch', options);
+  }
+  drive<T = drive_v2.Drive | drive_v3.Drive>(options: ServiceOptions|string) {
+    return this.getAPI<T>('drive', options);
+  }
+  firebasedynamiclinks<T = firebasedynamiclinks_v1.Firebasedynamiclinks>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('firebasedynamiclinks', options);
+  }
+  firebaserules<T = firebaserules_v1.Firebaserules>(options: ServiceOptions|
+                                                    string) {
+    return this.getAPI<T>('firebaserules', options);
+  }
+  firestore<T = firestore_v1beta1.Firestore>(options: ServiceOptions|string) {
+    return this.getAPI<T>('firestore', options);
   }
-  adsense(options: ServiceOptions|string) {
-    return this.getAPI('adsense', options);
+  fitness<T = fitness_v1.Fitness>(options: ServiceOptions|string) {
+    return this.getAPI<T>('fitness', options);
   }
-  adsensehost(options: ServiceOptions|string) {
-    return this.getAPI('adsensehost', options);
+  fusiontables<T = fusiontables_v1.Fusiontables | fusiontables_v2.Fusiontables>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('fusiontables', options);
   }
-  analytics(options: ServiceOptions|string) {
-    return this.getAPI('analytics', options);
+  games<T = games_v1.Games>(options: ServiceOptions|string) {
+    return this.getAPI<T>('games', options);
   }
-  analyticsreporting(options: ServiceOptions|string) {
-    return this.getAPI('analyticsreporting', options);
+  gamesConfiguration<T = gamesConfiguration_v1configuration.Gamesconfiguration>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('gamesConfiguration', options);
   }
-  androiddeviceprovisioning(options: ServiceOptions|string) {
-    return this.getAPI('androiddeviceprovisioning', options);
+  gamesManagement<T = gamesManagement_v1management.Gamesmanagement>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('gamesManagement', options);
   }
-  androidenterprise(options: ServiceOptions|string) {
-    return this.getAPI('androidenterprise', options);
+  genomics<
+      T = genomics_v1.Genomics | genomics_v1alpha2.Genomics |
+          genomics_v2alpha1.Genomics>(options: ServiceOptions|string) {
+    return this.getAPI<T>('genomics', options);
   }
-  androidmanagement(options: ServiceOptions|string) {
-    return this.getAPI('androidmanagement', options);
+  gmail<T = gmail_v1.Gmail>(options: ServiceOptions|string) {
+    return this.getAPI<T>('gmail', options);
   }
-  androidpublisher(options: ServiceOptions|string) {
-    return this.getAPI('androidpublisher', options);
+  groupsmigration<T = groupsmigration_v1.Groupsmigration>(options:
+                                                              ServiceOptions|
+                                                          string) {
+    return this.getAPI<T>('groupsmigration', options);
   }
-  appengine(options: ServiceOptions|string) {
-    return this.getAPI('appengine', options);
+  groupssettings<T = groupssettings_v1.Groupssettings>(options: ServiceOptions|
+                                                       string) {
+    return this.getAPI<T>('groupssettings', options);
   }
-  appsactivity(options: ServiceOptions|string) {
-    return this.getAPI('appsactivity', options);
+  iam<T = iam_v1.Iam>(options: ServiceOptions|string) {
+    return this.getAPI<T>('iam', options);
   }
-  appstate(options: ServiceOptions|string) {
-    return this.getAPI('appstate', options);
+  identitytoolkit<T = identitytoolkit_v3.Identitytoolkit>(options:
+                                                              ServiceOptions|
+                                                          string) {
+    return this.getAPI<T>('identitytoolkit', options);
   }
-  bigquery(options: ServiceOptions|string) {
-    return this.getAPI('bigquery', options);
+  kgsearch<T = kgsearch_v1.Kgsearch>(options: ServiceOptions|string) {
+    return this.getAPI<T>('kgsearch', options);
   }
-  bigquerydatatransfer(options: ServiceOptions|string) {
-    return this.getAPI('bigquerydatatransfer', options);
+  language<
+      T = language_v1.Language | language_v1beta1.Language |
+          language_v1beta2.Language>(options: ServiceOptions|string) {
+    return this.getAPI<T>('language', options);
   }
-  blogger(options: ServiceOptions|string) {
-    return this.getAPI('blogger', options);
+  licensing<T = licensing_v1.Licensing>(options: ServiceOptions|string) {
+    return this.getAPI<T>('licensing', options);
   }
-  books(options: ServiceOptions|string) {
-    return this.getAPI('books', options);
+  logging<T = logging_v2.Logging | logging_v2beta1.Logging>(options:
+                                                                ServiceOptions|
+                                                            string) {
+    return this.getAPI<T>('logging', options);
   }
-  calendar(options: ServiceOptions|string) {
-    return this.getAPI('calendar', options);
+  manufacturers<T = manufacturers_v1.Manufacturers>(options: ServiceOptions|
+                                                    string) {
+    return this.getAPI<T>('manufacturers', options);
   }
-  chat(options: ServiceOptions|string) {
-    return this.getAPI('chat', options);
+  mirror<T = mirror_v1.Mirror>(options: ServiceOptions|string) {
+    return this.getAPI<T>('mirror', options);
   }
-  civicinfo(options: ServiceOptions|string) {
-    return this.getAPI('civicinfo', options);
+  ml<T = ml_v1.Ml>(options: ServiceOptions|string) {
+    return this.getAPI<T>('ml', options);
   }
-  classroom(options: ServiceOptions|string) {
-    return this.getAPI('classroom', options);
+  monitoring<T = monitoring_v3.Monitoring>(options: ServiceOptions|string) {
+    return this.getAPI<T>('monitoring', options);
   }
-  cloudbilling(options: ServiceOptions|string) {
-    return this.getAPI('cloudbilling', options);
+  oauth2<T = oauth2_v1.Oauth2 | oauth2_v2.Oauth2>(options: ServiceOptions|
+                                                  string) {
+    return this.getAPI<T>('oauth2', options);
   }
-  cloudbuild(options: ServiceOptions|string) {
-    return this.getAPI('cloudbuild', options);
+  oslogin<
+      T = oslogin_v1.Oslogin | oslogin_v1alpha.Oslogin |
+          oslogin_v1beta.Oslogin>(options: ServiceOptions|string) {
+    return this.getAPI<T>('oslogin', options);
   }
-  clouddebugger(options: ServiceOptions|string) {
-    return this.getAPI('clouddebugger', options);
+  pagespeedonline<
+      T = pagespeedonline_v1.Pagespeedonline |
+          pagespeedonline_v2.Pagespeedonline |
+          pagespeedonline_v4.Pagespeedonline>(options: ServiceOptions|string) {
+    return this.getAPI<T>('pagespeedonline', options);
   }
-  clouderrorreporting(options: ServiceOptions|string) {
-    return this.getAPI('clouderrorreporting', options);
+  partners<T = partners_v2.Partners>(options: ServiceOptions|string) {
+    return this.getAPI<T>('partners', options);
   }
-  cloudfunctions(options: ServiceOptions|string) {
-    return this.getAPI('cloudfunctions', options);
+  people<T = people_v1.People>(options: ServiceOptions|string) {
+    return this.getAPI<T>('people', options);
   }
-  cloudiot(options: ServiceOptions|string) {
-    return this.getAPI('cloudiot', options);
+  playcustomapp<T = playcustomapp_v1.Playcustomapp>(options: ServiceOptions|
+                                                    string) {
+    return this.getAPI<T>('playcustomapp', options);
   }
-  cloudkms(options: ServiceOptions|string) {
-    return this.getAPI('cloudkms', options);
+  plus<T = plus_v1.Plus>(options: ServiceOptions|string) {
+    return this.getAPI<T>('plus', options);
   }
-  cloudresourcemanager(options: ServiceOptions|string) {
-    return this.getAPI('cloudresourcemanager', options);
+  plusDomains<T = plusDomains_v1.Plusdomains>(options: ServiceOptions|string) {
+    return this.getAPI<T>('plusDomains', options);
   }
-  cloudshell(options: ServiceOptions|string) {
-    return this.getAPI('cloudshell', options);
+  poly<T = poly_v1.Poly>(options: ServiceOptions|string) {
+    return this.getAPI<T>('poly', options);
   }
-  cloudtasks(options: ServiceOptions|string) {
-    return this.getAPI('cloudtasks', options);
+  prediction<
+      T = prediction_v1_2.Prediction | prediction_v1_3.Prediction |
+          prediction_v1_4.Prediction | prediction_v1_5.Prediction |
+          prediction_v1_6.Prediction>(options: ServiceOptions|string) {
+    return this.getAPI<T>('prediction', options);
   }
-  cloudtrace(options: ServiceOptions|string) {
-    return this.getAPI('cloudtrace', options);
+  proximitybeacon<T = proximitybeacon_v1beta1.Proximitybeacon>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('proximitybeacon', options);
   }
-  compute(options: ServiceOptions|string) {
-    return this.getAPI('compute', options);
+  pubsub<T = pubsub_v1.Pubsub | pubsub_v1beta1a.Pubsub | pubsub_v1beta2.Pubsub>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('pubsub', options);
   }
-  container(options: ServiceOptions|string) {
-    return this.getAPI('container', options);
+  replicapool<
+      T = replicapool_v1beta1.Replicapool | replicapool_v1beta2.Replicapool>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('replicapool', options);
   }
-  content(options: ServiceOptions|string) {
-    return this.getAPI('content', options);
+  replicapoolupdater<T = replicapoolupdater_v1beta1.Replicapoolupdater>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('replicapoolupdater', options);
   }
-  customsearch(options: ServiceOptions|string) {
-    return this.getAPI('customsearch', options);
+  reseller<T = reseller_v1.Reseller>(options: ServiceOptions|string) {
+    return this.getAPI<T>('reseller', options);
   }
-  dataflow(options: ServiceOptions|string) {
-    return this.getAPI('dataflow', options);
+  resourceviews<
+      T = resourceviews_v1beta1.Resourceviews |
+          resourceviews_v1beta2.Resourceviews>(options: ServiceOptions|string) {
+    return this.getAPI<T>('resourceviews', options);
   }
-  dataproc(options: ServiceOptions|string) {
-    return this.getAPI('dataproc', options);
+  runtimeconfig<
+      T = runtimeconfig_v1.Runtimeconfig | runtimeconfig_v1beta1.Runtimeconfig>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('runtimeconfig', options);
   }
-  datastore(options: ServiceOptions|string) {
-    return this.getAPI('datastore', options);
+  safebrowsing<T = safebrowsing_v4.Safebrowsing>(options: ServiceOptions|
+                                                 string) {
+    return this.getAPI<T>('safebrowsing', options);
   }
-  deploymentmanager(options: ServiceOptions|string) {
-    return this.getAPI('deploymentmanager', options);
+  script<T = script_v1.Script>(options: ServiceOptions|string) {
+    return this.getAPI<T>('script', options);
   }
-  dfareporting(options: ServiceOptions|string) {
-    return this.getAPI('dfareporting', options);
+  searchconsole<T = searchconsole_v1.Searchconsole>(options: ServiceOptions|
+                                                    string) {
+    return this.getAPI<T>('searchconsole', options);
   }
-  dialogflow(options: ServiceOptions|string) {
-    return this.getAPI('dialogflow', options);
+  serviceconsumermanagement<
+      T = serviceconsumermanagement_v1.Serviceconsumermanagement>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('serviceconsumermanagement', options);
   }
-  digitalassetlinks(options: ServiceOptions|string) {
-    return this.getAPI('digitalassetlinks', options);
+  servicecontrol<T = servicecontrol_v1.Servicecontrol>(options: ServiceOptions|
+                                                       string) {
+    return this.getAPI<T>('servicecontrol', options);
   }
-  discovery(options: ServiceOptions|string) {
-    return this.getAPI('discovery', options);
+  servicemanagement<T = servicemanagement_v1.Servicemanagement>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('servicemanagement', options);
   }
-  dlp(options: ServiceOptions|string) {
-    return this.getAPI('dlp', options);
+  serviceusage<T = serviceusage_v1beta1.Serviceusage>(options: ServiceOptions|
+                                                      string) {
+    return this.getAPI<T>('serviceusage', options);
   }
-  dns(options: ServiceOptions|string) {
-    return this.getAPI('dns', options);
+  serviceuser<T = serviceuser_v1.Serviceuser>(options: ServiceOptions|string) {
+    return this.getAPI<T>('serviceuser', options);
   }
-  doubleclickbidmanager(options: ServiceOptions|string) {
-    return this.getAPI('doubleclickbidmanager', options);
+  sheets<T = sheets_v4.Sheets>(options: ServiceOptions|string) {
+    return this.getAPI<T>('sheets', options);
   }
-  doubleclicksearch(options: ServiceOptions|string) {
-    return this.getAPI('doubleclicksearch', options);
+  siteVerification<T = siteVerification_v1.Siteverification>(options:
+                                                                 ServiceOptions|
+                                                             string) {
+    return this.getAPI<T>('siteVerification', options);
   }
-  drive(options: ServiceOptions|string) {
-    return this.getAPI('drive', options);
+  slides<T = slides_v1.Slides>(options: ServiceOptions|string) {
+    return this.getAPI<T>('slides', options);
   }
-  firebasedynamiclinks(options: ServiceOptions|string) {
-    return this.getAPI('firebasedynamiclinks', options);
+  sourcerepo<T = sourcerepo_v1.Sourcerepo>(options: ServiceOptions|string) {
+    return this.getAPI<T>('sourcerepo', options);
   }
-  firebaserules(options: ServiceOptions|string) {
-    return this.getAPI('firebaserules', options);
+  spanner<T = spanner_v1.Spanner>(options: ServiceOptions|string) {
+    return this.getAPI<T>('spanner', options);
   }
-  firestore(options: ServiceOptions|string) {
-    return this.getAPI('firestore', options);
+  spectrum<T = spectrum_v1explorer.Spectrum>(options: ServiceOptions|string) {
+    return this.getAPI<T>('spectrum', options);
   }
-  fitness(options: ServiceOptions|string) {
-    return this.getAPI('fitness', options);
+  speech<T = speech_v1.Speech | speech_v1beta1.Speech>(options: ServiceOptions|
+                                                       string) {
+    return this.getAPI<T>('speech', options);
   }
-  fusiontables(options: ServiceOptions|string) {
-    return this.getAPI('fusiontables', options);
+  sqladmin<T = sqladmin_v1beta3.Sqladmin | sqladmin_v1beta4.Sqladmin>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('sqladmin', options);
   }
-  games(options: ServiceOptions|string) {
-    return this.getAPI('games', options);
+  storage<
+      T = storage_v1.Storage | storage_v1beta1.Storage |
+          storage_v1beta2.Storage>(options: ServiceOptions|string) {
+    return this.getAPI<T>('storage', options);
   }
-  gamesConfiguration(options: ServiceOptions|string) {
-    return this.getAPI('gamesConfiguration', options);
+  storagetransfer<T = storagetransfer_v1.Storagetransfer>(options:
+                                                              ServiceOptions|
+                                                          string) {
+    return this.getAPI<T>('storagetransfer', options);
   }
-  gamesManagement(options: ServiceOptions|string) {
-    return this.getAPI('gamesManagement', options);
+  streetviewpublish<T = streetviewpublish_v1.Streetviewpublish>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('streetviewpublish', options);
   }
-  genomics(options: ServiceOptions|string) {
-    return this.getAPI('genomics', options);
+  surveys<T = surveys_v2.Surveys>(options: ServiceOptions|string) {
+    return this.getAPI<T>('surveys', options);
   }
-  gmail(options: ServiceOptions|string) {
-    return this.getAPI('gmail', options);
+  tagmanager<T = tagmanager_v1.Tagmanager | tagmanager_v2.Tagmanager>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('tagmanager', options);
   }
-  groupsmigration(options: ServiceOptions|string) {
-    return this.getAPI('groupsmigration', options);
+  taskqueue<T = taskqueue_v1beta1.Taskqueue | taskqueue_v1beta2.Taskqueue>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('taskqueue', options);
   }
-  groupssettings(options: ServiceOptions|string) {
-    return this.getAPI('groupssettings', options);
+  tasks<T = tasks_v1.Tasks>(options: ServiceOptions|string) {
+    return this.getAPI<T>('tasks', options);
   }
-  iam(options: ServiceOptions|string) {
-    return this.getAPI('iam', options);
+  testing<T = testing_v1.Testing>(options: ServiceOptions|string) {
+    return this.getAPI<T>('testing', options);
   }
-  identitytoolkit(options: ServiceOptions|string) {
-    return this.getAPI('identitytoolkit', options);
+  texttospeech<T = texttospeech_v1beta1.Texttospeech>(options: ServiceOptions|
+                                                      string) {
+    return this.getAPI<T>('texttospeech', options);
   }
-  kgsearch(options: ServiceOptions|string) {
-    return this.getAPI('kgsearch', options);
+  toolresults<T = toolresults_v1beta3.Toolresults>(options: ServiceOptions|
+                                                   string) {
+    return this.getAPI<T>('toolresults', options);
   }
-  language(options: ServiceOptions|string) {
-    return this.getAPI('language', options);
+  tpu<T = tpu_v1alpha1.Tpu>(options: ServiceOptions|string) {
+    return this.getAPI<T>('tpu', options);
   }
-  licensing(options: ServiceOptions|string) {
-    return this.getAPI('licensing', options);
+  translate<T = translate_v2.Translate>(options: ServiceOptions|string) {
+    return this.getAPI<T>('translate', options);
   }
-  logging(options: ServiceOptions|string) {
-    return this.getAPI('logging', options);
+  urlshortener<T = urlshortener_v1.Urlshortener>(options: ServiceOptions|
+                                                 string) {
+    return this.getAPI<T>('urlshortener', options);
   }
-  manufacturers(options: ServiceOptions|string) {
-    return this.getAPI('manufacturers', options);
+  vault<T = vault_v1.Vault>(options: ServiceOptions|string) {
+    return this.getAPI<T>('vault', options);
   }
-  mirror(options: ServiceOptions|string) {
-    return this.getAPI('mirror', options);
+  videointelligence<T = videointelligence_v1beta1.Videointelligence>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('videointelligence', options);
   }
-  ml(options: ServiceOptions|string) {
-    return this.getAPI('ml', options);
+  vision<
+      T = vision_v1.Vision | vision_v1p1beta1.Vision | vision_v1p2beta1.Vision>(
+      options: ServiceOptions|string) {
+    return this.getAPI<T>('vision', options);
   }
-  monitoring(options: ServiceOptions|string) {
-    return this.getAPI('monitoring', options);
+  webfonts<T = webfonts_v1.Webfonts>(options: ServiceOptions|string) {
+    return this.getAPI<T>('webfonts', options);
   }
-  oauth2(options: ServiceOptions|string) {
-    return this.getAPI('oauth2', options);
+  webmasters<T = webmasters_v3.Webmasters>(options: ServiceOptions|string) {
+    return this.getAPI<T>('webmasters', options);
   }
-  oslogin(options: ServiceOptions|string) {
-    return this.getAPI('oslogin', options);
+  youtube<T = youtube_v3.Youtube>(options: ServiceOptions|string) {
+    return this.getAPI<T>('youtube', options);
   }
-  pagespeedonline(options: ServiceOptions|string) {
-    return this.getAPI('pagespeedonline', options);
+  youtubeAnalytics<
+      T = youtubeAnalytics_v1.Youtubeanalytics |
+          youtubeAnalytics_v1beta1.Youtubeanalytics>(options: ServiceOptions|
+                                                     string) {
+    return this.getAPI<T>('youtubeAnalytics', options);
   }
-  partners(options: ServiceOptions|string) {
-    return this.getAPI('partners', options);
-  }
-  people(options: ServiceOptions|string) {
-    return this.getAPI('people', options);
-  }
-  playcustomapp(options: ServiceOptions|string) {
-    return this.getAPI('playcustomapp', options);
-  }
-  plus(options: ServiceOptions|string) {
-    return this.getAPI('plus', options);
-  }
-  plusDomains(options: ServiceOptions|string) {
-    return this.getAPI('plusDomains', options);
-  }
-  poly(options: ServiceOptions|string) {
-    return this.getAPI('poly', options);
-  }
-  prediction(options: ServiceOptions|string) {
-    return this.getAPI('prediction', options);
-  }
-  proximitybeacon(options: ServiceOptions|string) {
-    return this.getAPI('proximitybeacon', options);
-  }
-  pubsub(options: ServiceOptions|string) {
-    return this.getAPI('pubsub', options);
-  }
-  replicapool(options: ServiceOptions|string) {
-    return this.getAPI('replicapool', options);
-  }
-  replicapoolupdater(options: ServiceOptions|string) {
-    return this.getAPI('replicapoolupdater', options);
-  }
-  reseller(options: ServiceOptions|string) {
-    return this.getAPI('reseller', options);
-  }
-  resourceviews(options: ServiceOptions|string) {
-    return this.getAPI('resourceviews', options);
-  }
-  runtimeconfig(options: ServiceOptions|string) {
-    return this.getAPI('runtimeconfig', options);
-  }
-  safebrowsing(options: ServiceOptions|string) {
-    return this.getAPI('safebrowsing', options);
-  }
-  script(options: ServiceOptions|string) {
-    return this.getAPI('script', options);
-  }
-  searchconsole(options: ServiceOptions|string) {
-    return this.getAPI('searchconsole', options);
-  }
-  serviceconsumermanagement(options: ServiceOptions|string) {
-    return this.getAPI('serviceconsumermanagement', options);
-  }
-  servicecontrol(options: ServiceOptions|string) {
-    return this.getAPI('servicecontrol', options);
-  }
-  servicemanagement(options: ServiceOptions|string) {
-    return this.getAPI('servicemanagement', options);
-  }
-  serviceusage(options: ServiceOptions|string) {
-    return this.getAPI('serviceusage', options);
-  }
-  serviceuser(options: ServiceOptions|string) {
-    return this.getAPI('serviceuser', options);
-  }
-  sheets(options: ServiceOptions|string) {
-    return this.getAPI('sheets', options);
-  }
-  siteVerification(options: ServiceOptions|string) {
-    return this.getAPI('siteVerification', options);
-  }
-  slides(options: ServiceOptions|string) {
-    return this.getAPI('slides', options);
-  }
-  sourcerepo(options: ServiceOptions|string) {
-    return this.getAPI('sourcerepo', options);
-  }
-  spanner(options: ServiceOptions|string) {
-    return this.getAPI('spanner', options);
-  }
-  spectrum(options: ServiceOptions|string) {
-    return this.getAPI('spectrum', options);
-  }
-  speech(options: ServiceOptions|string) {
-    return this.getAPI('speech', options);
-  }
-  sqladmin(options: ServiceOptions|string) {
-    return this.getAPI('sqladmin', options);
-  }
-  storage(options: ServiceOptions|string) {
-    return this.getAPI('storage', options);
-  }
-  storagetransfer(options: ServiceOptions|string) {
-    return this.getAPI('storagetransfer', options);
-  }
-  streetviewpublish(options: ServiceOptions|string) {
-    return this.getAPI('streetviewpublish', options);
-  }
-  surveys(options: ServiceOptions|string) {
-    return this.getAPI('surveys', options);
-  }
-  tagmanager(options: ServiceOptions|string) {
-    return this.getAPI('tagmanager', options);
-  }
-  taskqueue(options: ServiceOptions|string) {
-    return this.getAPI('taskqueue', options);
-  }
-  tasks(options: ServiceOptions|string) {
-    return this.getAPI('tasks', options);
-  }
-  testing(options: ServiceOptions|string) {
-    return this.getAPI('testing', options);
-  }
-  texttospeech(options: ServiceOptions|string) {
-    return this.getAPI('texttospeech', options);
-  }
-  toolresults(options: ServiceOptions|string) {
-    return this.getAPI('toolresults', options);
-  }
-  tpu(options: ServiceOptions|string) {
-    return this.getAPI('tpu', options);
-  }
-  translate(options: ServiceOptions|string) {
-    return this.getAPI('translate', options);
-  }
-  urlshortener(options: ServiceOptions|string) {
-    return this.getAPI('urlshortener', options);
-  }
-  vault(options: ServiceOptions|string) {
-    return this.getAPI('vault', options);
-  }
-  videointelligence(options: ServiceOptions|string) {
-    return this.getAPI('videointelligence', options);
-  }
-  vision(options: ServiceOptions|string) {
-    return this.getAPI('vision', options);
-  }
-  webfonts(options: ServiceOptions|string) {
-    return this.getAPI('webfonts', options);
-  }
-  webmasters(options: ServiceOptions|string) {
-    return this.getAPI('webmasters', options);
-  }
-  youtube(options: ServiceOptions|string) {
-    return this.getAPI('youtube', options);
-  }
-  youtubeAnalytics(options: ServiceOptions|string) {
-    return this.getAPI('youtubeAnalytics', options);
-  }
-  youtubereporting(options: ServiceOptions|string) {
-    return this.getAPI('youtubereporting', options);
+  youtubereporting<T = youtubereporting_v1.Youtubereporting>(options:
+                                                                 ServiceOptions|
+                                                             string) {
+    return this.getAPI<T>('youtubereporting', options);
   }
 }
diff --git a/src/apis/kgsearch/v1.ts b/src/apis/kgsearch/v1.ts
index 86c402add0..cd0edcba1d 100644
--- a/src/apis/kgsearch/v1.ts
+++ b/src/apis/kgsearch/v1.ts
@@ -115,14 +115,14 @@ export class Resource$Entities {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  search(params: any, options?: MethodOptions):
+  search(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SearchResponse>;
   search(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SearchResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SearchResponse>,
       callback?: BodyResponseCallback<Schema$SearchResponse>): void;
   search(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SearchResponse>,
       callback?: BodyResponseCallback<Schema$SearchResponse>):
       void|AxiosPromise<Schema$SearchResponse> {
diff --git a/src/apis/language/v1.ts b/src/apis/language/v1.ts
index 720543b4bd..6ba5717985 100644
--- a/src/apis/language/v1.ts
+++ b/src/apis/language/v1.ts
@@ -249,7 +249,8 @@ export interface Schema$ClassificationCategory {
    */
   confidence: number;
   /**
-   * The name of the category representing the document.
+   * The name of the category representing the document, from the [predefined
+   * taxonomy](/natural-language/docs/categories).
    */
   name: string;
 }
@@ -606,15 +607,15 @@ export class Resource$Documents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  analyzeEntities(params: any, options?: MethodOptions):
+  analyzeEntities(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AnalyzeEntitiesResponse>;
   analyzeEntities(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AnalyzeEntitiesResponse>,
       callback?: BodyResponseCallback<Schema$AnalyzeEntitiesResponse>): void;
   analyzeEntities(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AnalyzeEntitiesResponse>,
       callback?: BodyResponseCallback<Schema$AnalyzeEntitiesResponse>):
@@ -663,16 +664,16 @@ export class Resource$Documents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  analyzeEntitySentiment(params: any, options?: MethodOptions):
+  analyzeEntitySentiment(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AnalyzeEntitySentimentResponse>;
   analyzeEntitySentiment(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AnalyzeEntitySentimentResponse>,
       callback?: BodyResponseCallback<Schema$AnalyzeEntitySentimentResponse>):
       void;
   analyzeEntitySentiment(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AnalyzeEntitySentimentResponse>,
       callback?: BodyResponseCallback<Schema$AnalyzeEntitySentimentResponse>):
@@ -722,15 +723,15 @@ export class Resource$Documents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  analyzeSentiment(params: any, options?: MethodOptions):
+  analyzeSentiment(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AnalyzeSentimentResponse>;
   analyzeSentiment(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AnalyzeSentimentResponse>,
       callback?: BodyResponseCallback<Schema$AnalyzeSentimentResponse>): void;
   analyzeSentiment(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AnalyzeSentimentResponse>,
       callback?: BodyResponseCallback<Schema$AnalyzeSentimentResponse>):
@@ -780,14 +781,15 @@ export class Resource$Documents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  analyzeSyntax(params: any, options?: MethodOptions):
+  analyzeSyntax(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AnalyzeSyntaxResponse>;
   analyzeSyntax(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AnalyzeSyntaxResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$AnalyzeSyntaxResponse>,
       callback?: BodyResponseCallback<Schema$AnalyzeSyntaxResponse>): void;
   analyzeSyntax(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AnalyzeSyntaxResponse>,
       callback?: BodyResponseCallback<Schema$AnalyzeSyntaxResponse>):
@@ -836,14 +838,14 @@ export class Resource$Documents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  annotateText(params: any, options?: MethodOptions):
+  annotateText(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AnnotateTextResponse>;
   annotateText(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AnnotateTextResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AnnotateTextResponse>,
       callback?: BodyResponseCallback<Schema$AnnotateTextResponse>): void;
   annotateText(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AnnotateTextResponse>,
       callback?: BodyResponseCallback<Schema$AnnotateTextResponse>):
       void|AxiosPromise<Schema$AnnotateTextResponse> {
@@ -890,14 +892,14 @@ export class Resource$Documents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  classifyText(params: any, options?: MethodOptions):
+  classifyText(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ClassifyTextResponse>;
   classifyText(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ClassifyTextResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ClassifyTextResponse>,
       callback?: BodyResponseCallback<Schema$ClassifyTextResponse>): void;
   classifyText(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ClassifyTextResponse>,
       callback?: BodyResponseCallback<Schema$ClassifyTextResponse>):
       void|AxiosPromise<Schema$ClassifyTextResponse> {
diff --git a/src/apis/language/v1beta1.ts b/src/apis/language/v1beta1.ts
index c60e863c14..ddfeea446f 100644
--- a/src/apis/language/v1beta1.ts
+++ b/src/apis/language/v1beta1.ts
@@ -524,15 +524,15 @@ export class Resource$Documents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  analyzeEntities(params: any, options?: MethodOptions):
+  analyzeEntities(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AnalyzeEntitiesResponse>;
   analyzeEntities(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AnalyzeEntitiesResponse>,
       callback?: BodyResponseCallback<Schema$AnalyzeEntitiesResponse>): void;
   analyzeEntities(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AnalyzeEntitiesResponse>,
       callback?: BodyResponseCallback<Schema$AnalyzeEntitiesResponse>):
@@ -580,15 +580,15 @@ export class Resource$Documents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  analyzeSentiment(params: any, options?: MethodOptions):
+  analyzeSentiment(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AnalyzeSentimentResponse>;
   analyzeSentiment(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AnalyzeSentimentResponse>,
       callback?: BodyResponseCallback<Schema$AnalyzeSentimentResponse>): void;
   analyzeSentiment(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AnalyzeSentimentResponse>,
       callback?: BodyResponseCallback<Schema$AnalyzeSentimentResponse>):
@@ -638,14 +638,15 @@ export class Resource$Documents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  analyzeSyntax(params: any, options?: MethodOptions):
+  analyzeSyntax(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AnalyzeSyntaxResponse>;
   analyzeSyntax(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AnalyzeSyntaxResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$AnalyzeSyntaxResponse>,
       callback?: BodyResponseCallback<Schema$AnalyzeSyntaxResponse>): void;
   analyzeSyntax(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AnalyzeSyntaxResponse>,
       callback?: BodyResponseCallback<Schema$AnalyzeSyntaxResponse>):
@@ -694,14 +695,14 @@ export class Resource$Documents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  annotateText(params: any, options?: MethodOptions):
+  annotateText(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AnnotateTextResponse>;
   annotateText(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AnnotateTextResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AnnotateTextResponse>,
       callback?: BodyResponseCallback<Schema$AnnotateTextResponse>): void;
   annotateText(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AnnotateTextResponse>,
       callback?: BodyResponseCallback<Schema$AnnotateTextResponse>):
       void|AxiosPromise<Schema$AnnotateTextResponse> {
diff --git a/src/apis/language/v1beta2.ts b/src/apis/language/v1beta2.ts
index e9f3ac03b7..3ab777fc44 100644
--- a/src/apis/language/v1beta2.ts
+++ b/src/apis/language/v1beta2.ts
@@ -250,7 +250,8 @@ export interface Schema$ClassificationCategory {
    */
   confidence: number;
   /**
-   * The name of the category representing the document.
+   * The name of the category representing the document, from the [predefined
+   * taxonomy](/natural-language/docs/categories).
    */
   name: string;
 }
@@ -606,15 +607,15 @@ export class Resource$Documents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  analyzeEntities(params: any, options?: MethodOptions):
+  analyzeEntities(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AnalyzeEntitiesResponse>;
   analyzeEntities(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AnalyzeEntitiesResponse>,
       callback?: BodyResponseCallback<Schema$AnalyzeEntitiesResponse>): void;
   analyzeEntities(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AnalyzeEntitiesResponse>,
       callback?: BodyResponseCallback<Schema$AnalyzeEntitiesResponse>):
@@ -663,16 +664,16 @@ export class Resource$Documents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  analyzeEntitySentiment(params: any, options?: MethodOptions):
+  analyzeEntitySentiment(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AnalyzeEntitySentimentResponse>;
   analyzeEntitySentiment(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AnalyzeEntitySentimentResponse>,
       callback?: BodyResponseCallback<Schema$AnalyzeEntitySentimentResponse>):
       void;
   analyzeEntitySentiment(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AnalyzeEntitySentimentResponse>,
       callback?: BodyResponseCallback<Schema$AnalyzeEntitySentimentResponse>):
@@ -722,15 +723,15 @@ export class Resource$Documents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  analyzeSentiment(params: any, options?: MethodOptions):
+  analyzeSentiment(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AnalyzeSentimentResponse>;
   analyzeSentiment(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AnalyzeSentimentResponse>,
       callback?: BodyResponseCallback<Schema$AnalyzeSentimentResponse>): void;
   analyzeSentiment(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AnalyzeSentimentResponse>,
       callback?: BodyResponseCallback<Schema$AnalyzeSentimentResponse>):
@@ -780,14 +781,15 @@ export class Resource$Documents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  analyzeSyntax(params: any, options?: MethodOptions):
+  analyzeSyntax(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AnalyzeSyntaxResponse>;
   analyzeSyntax(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AnalyzeSyntaxResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$AnalyzeSyntaxResponse>,
       callback?: BodyResponseCallback<Schema$AnalyzeSyntaxResponse>): void;
   analyzeSyntax(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AnalyzeSyntaxResponse>,
       callback?: BodyResponseCallback<Schema$AnalyzeSyntaxResponse>):
@@ -836,14 +838,14 @@ export class Resource$Documents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  annotateText(params: any, options?: MethodOptions):
+  annotateText(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AnnotateTextResponse>;
   annotateText(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AnnotateTextResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AnnotateTextResponse>,
       callback?: BodyResponseCallback<Schema$AnnotateTextResponse>): void;
   annotateText(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AnnotateTextResponse>,
       callback?: BodyResponseCallback<Schema$AnnotateTextResponse>):
       void|AxiosPromise<Schema$AnnotateTextResponse> {
@@ -890,14 +892,14 @@ export class Resource$Documents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  classifyText(params: any, options?: MethodOptions):
+  classifyText(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ClassifyTextResponse>;
   classifyText(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ClassifyTextResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ClassifyTextResponse>,
       callback?: BodyResponseCallback<Schema$ClassifyTextResponse>): void;
   classifyText(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ClassifyTextResponse>,
       callback?: BodyResponseCallback<Schema$ClassifyTextResponse>):
       void|AxiosPromise<Schema$ClassifyTextResponse> {
diff --git a/src/apis/licensing/v1.ts b/src/apis/licensing/v1.ts
index d6d083daff..e8a50cb0ff 100644
--- a/src/apis/licensing/v1.ts
+++ b/src/apis/licensing/v1.ts
@@ -158,12 +158,12 @@ export class Resource$Licenseassignments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -212,12 +212,12 @@ export class Resource$Licenseassignments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$LicenseAssignment>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LicenseAssignment>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LicenseAssignment>,
       callback?: BodyResponseCallback<Schema$LicenseAssignment>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LicenseAssignment>,
       callback?: BodyResponseCallback<Schema$LicenseAssignment>):
       void|AxiosPromise<Schema$LicenseAssignment> {
@@ -268,14 +268,14 @@ export class Resource$Licenseassignments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LicenseAssignment>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LicenseAssignment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LicenseAssignment>,
       callback?: BodyResponseCallback<Schema$LicenseAssignment>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LicenseAssignment>,
       callback?: BodyResponseCallback<Schema$LicenseAssignment>):
       void|AxiosPromise<Schema$LicenseAssignment> {
@@ -326,14 +326,15 @@ export class Resource$Licenseassignments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listForProduct(params: any, options?: MethodOptions):
+  listForProduct(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LicenseAssignmentList>;
   listForProduct(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LicenseAssignmentList>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$LicenseAssignmentList>,
       callback?: BodyResponseCallback<Schema$LicenseAssignmentList>): void;
   listForProduct(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$LicenseAssignmentList>,
       callback?: BodyResponseCallback<Schema$LicenseAssignmentList>):
@@ -385,14 +386,15 @@ export class Resource$Licenseassignments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listForProductAndSku(params: any, options?: MethodOptions):
+  listForProductAndSku(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LicenseAssignmentList>;
   listForProductAndSku(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LicenseAssignmentList>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$LicenseAssignmentList>,
       callback?: BodyResponseCallback<Schema$LicenseAssignmentList>): void;
   listForProductAndSku(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$LicenseAssignmentList>,
       callback?: BodyResponseCallback<Schema$LicenseAssignmentList>):
@@ -444,14 +446,14 @@ export class Resource$Licenseassignments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LicenseAssignment>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LicenseAssignment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LicenseAssignment>,
       callback?: BodyResponseCallback<Schema$LicenseAssignment>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LicenseAssignment>,
       callback?: BodyResponseCallback<Schema$LicenseAssignment>):
       void|AxiosPromise<Schema$LicenseAssignment> {
@@ -503,14 +505,14 @@ export class Resource$Licenseassignments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LicenseAssignment>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LicenseAssignment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LicenseAssignment>,
       callback?: BodyResponseCallback<Schema$LicenseAssignment>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LicenseAssignment>,
       callback?: BodyResponseCallback<Schema$LicenseAssignment>):
       void|AxiosPromise<Schema$LicenseAssignment> {
diff --git a/src/apis/logging/v2.ts b/src/apis/logging/v2.ts
index a26ab59aed..1972fd1c54 100644
--- a/src/apis/logging/v2.ts
+++ b/src/apis/logging/v2.ts
@@ -489,10 +489,10 @@ export interface Schema$LogEntry {
    */
   receiveTimestamp: string;
   /**
-   * Required. The monitored resource associated with this log entry. Example: a
-   * log entry that reports a database error would be associated with the
-   * monitored resource designating the particular database that reported the
-   * error.
+   * Required. The primary monitored resource associated with this log entry.
+   * Example: a log entry that reports a database error would be associated with
+   * the monitored resource designating the particular database that reported
+   * the error.
    */
   resource: Schema$MonitoredResource;
   /**
@@ -1260,14 +1260,14 @@ export class Resource$Billingaccounts$Exclusions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LogExclusion>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
       callback?: BodyResponseCallback<Schema$LogExclusion>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
       callback?: BodyResponseCallback<Schema$LogExclusion>):
       void|AxiosPromise<Schema$LogExclusion> {
@@ -1314,12 +1314,12 @@ export class Resource$Billingaccounts$Exclusions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1364,11 +1364,11 @@ export class Resource$Billingaccounts$Exclusions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$LogExclusion>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$LogExclusion>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
       callback?: BodyResponseCallback<Schema$LogExclusion>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
       callback?: BodyResponseCallback<Schema$LogExclusion>):
       void|AxiosPromise<Schema$LogExclusion> {
@@ -1416,15 +1416,15 @@ export class Resource$Billingaccounts$Exclusions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListExclusionsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListExclusionsResponse>,
       callback?: BodyResponseCallback<Schema$ListExclusionsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListExclusionsResponse>,
       callback?: BodyResponseCallback<Schema$ListExclusionsResponse>):
@@ -1474,14 +1474,14 @@ export class Resource$Billingaccounts$Exclusions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LogExclusion>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
       callback?: BodyResponseCallback<Schema$LogExclusion>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
       callback?: BodyResponseCallback<Schema$LogExclusion>):
       void|AxiosPromise<Schema$LogExclusion> {
@@ -1541,12 +1541,12 @@ export class Resource$Billingaccounts$Logs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1594,14 +1594,14 @@ export class Resource$Billingaccounts$Logs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListLogsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListLogsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListLogsResponse>,
       callback?: BodyResponseCallback<Schema$ListLogsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListLogsResponse>,
       callback?: BodyResponseCallback<Schema$ListLogsResponse>):
       void|AxiosPromise<Schema$ListLogsResponse> {
@@ -1664,12 +1664,14 @@ export class Resource$Billingaccounts$Sinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>):
       void|AxiosPromise<Schema$LogSink> {
     if (typeof options === 'function') {
@@ -1715,12 +1717,12 @@ export class Resource$Billingaccounts$Sinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1765,10 +1767,12 @@ export class Resource$Billingaccounts$Sinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>):
       void|AxiosPromise<Schema$LogSink> {
     if (typeof options === 'function') {
@@ -1815,14 +1819,14 @@ export class Resource$Billingaccounts$Sinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListSinksResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListSinksResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListSinksResponse>,
       callback?: BodyResponseCallback<Schema$ListSinksResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListSinksResponse>,
       callback?: BodyResponseCallback<Schema$ListSinksResponse>):
       void|AxiosPromise<Schema$ListSinksResponse> {
@@ -1874,12 +1878,14 @@ export class Resource$Billingaccounts$Sinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>):
       void|AxiosPromise<Schema$LogSink> {
     if (typeof options === 'function') {
@@ -1930,12 +1936,14 @@ export class Resource$Billingaccounts$Sinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>):
       void|AxiosPromise<Schema$LogSink> {
     if (typeof options === 'function') {
@@ -1994,15 +2002,15 @@ export class Resource$Entries {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListLogEntriesResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListLogEntriesResponse>,
       callback?: BodyResponseCallback<Schema$ListLogEntriesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListLogEntriesResponse>,
       callback?: BodyResponseCallback<Schema$ListLogEntriesResponse>):
@@ -2052,15 +2060,15 @@ export class Resource$Entries {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  write(params: any, options?: MethodOptions):
+  write(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$WriteLogEntriesResponse>;
   write(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$WriteLogEntriesResponse>,
       callback?: BodyResponseCallback<Schema$WriteLogEntriesResponse>): void;
   write(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$WriteLogEntriesResponse>,
       callback?: BodyResponseCallback<Schema$WriteLogEntriesResponse>):
@@ -2122,14 +2130,14 @@ export class Resource$Exclusions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LogExclusion>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
       callback?: BodyResponseCallback<Schema$LogExclusion>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
       callback?: BodyResponseCallback<Schema$LogExclusion>):
       void|AxiosPromise<Schema$LogExclusion> {
@@ -2176,12 +2184,12 @@ export class Resource$Exclusions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2226,11 +2234,11 @@ export class Resource$Exclusions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$LogExclusion>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$LogExclusion>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
       callback?: BodyResponseCallback<Schema$LogExclusion>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
       callback?: BodyResponseCallback<Schema$LogExclusion>):
       void|AxiosPromise<Schema$LogExclusion> {
@@ -2278,15 +2286,15 @@ export class Resource$Exclusions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListExclusionsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListExclusionsResponse>,
       callback?: BodyResponseCallback<Schema$ListExclusionsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListExclusionsResponse>,
       callback?: BodyResponseCallback<Schema$ListExclusionsResponse>):
@@ -2336,14 +2344,14 @@ export class Resource$Exclusions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LogExclusion>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
       callback?: BodyResponseCallback<Schema$LogExclusion>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
       callback?: BodyResponseCallback<Schema$LogExclusion>):
       void|AxiosPromise<Schema$LogExclusion> {
@@ -2421,14 +2429,14 @@ export class Resource$Folders$Exclusions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LogExclusion>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
       callback?: BodyResponseCallback<Schema$LogExclusion>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
       callback?: BodyResponseCallback<Schema$LogExclusion>):
       void|AxiosPromise<Schema$LogExclusion> {
@@ -2475,12 +2483,12 @@ export class Resource$Folders$Exclusions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2525,11 +2533,11 @@ export class Resource$Folders$Exclusions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$LogExclusion>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$LogExclusion>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
       callback?: BodyResponseCallback<Schema$LogExclusion>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
       callback?: BodyResponseCallback<Schema$LogExclusion>):
       void|AxiosPromise<Schema$LogExclusion> {
@@ -2577,15 +2585,15 @@ export class Resource$Folders$Exclusions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListExclusionsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListExclusionsResponse>,
       callback?: BodyResponseCallback<Schema$ListExclusionsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListExclusionsResponse>,
       callback?: BodyResponseCallback<Schema$ListExclusionsResponse>):
@@ -2635,14 +2643,14 @@ export class Resource$Folders$Exclusions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LogExclusion>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
       callback?: BodyResponseCallback<Schema$LogExclusion>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
       callback?: BodyResponseCallback<Schema$LogExclusion>):
       void|AxiosPromise<Schema$LogExclusion> {
@@ -2702,12 +2710,12 @@ export class Resource$Folders$Logs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2755,14 +2763,14 @@ export class Resource$Folders$Logs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListLogsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListLogsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListLogsResponse>,
       callback?: BodyResponseCallback<Schema$ListLogsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListLogsResponse>,
       callback?: BodyResponseCallback<Schema$ListLogsResponse>):
       void|AxiosPromise<Schema$ListLogsResponse> {
@@ -2825,12 +2833,14 @@ export class Resource$Folders$Sinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>):
       void|AxiosPromise<Schema$LogSink> {
     if (typeof options === 'function') {
@@ -2876,12 +2886,12 @@ export class Resource$Folders$Sinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2926,10 +2936,12 @@ export class Resource$Folders$Sinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>):
       void|AxiosPromise<Schema$LogSink> {
     if (typeof options === 'function') {
@@ -2976,14 +2988,14 @@ export class Resource$Folders$Sinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListSinksResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListSinksResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListSinksResponse>,
       callback?: BodyResponseCallback<Schema$ListSinksResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListSinksResponse>,
       callback?: BodyResponseCallback<Schema$ListSinksResponse>):
       void|AxiosPromise<Schema$ListSinksResponse> {
@@ -3035,12 +3047,14 @@ export class Resource$Folders$Sinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>):
       void|AxiosPromise<Schema$LogSink> {
     if (typeof options === 'function') {
@@ -3091,12 +3105,14 @@ export class Resource$Folders$Sinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>):
       void|AxiosPromise<Schema$LogSink> {
     if (typeof options === 'function') {
@@ -3156,12 +3172,12 @@ export class Resource$Logs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -3209,14 +3225,14 @@ export class Resource$Logs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListLogsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListLogsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListLogsResponse>,
       callback?: BodyResponseCallback<Schema$ListLogsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListLogsResponse>,
       callback?: BodyResponseCallback<Schema$ListLogsResponse>):
       void|AxiosPromise<Schema$ListLogsResponse> {
@@ -3276,16 +3292,16 @@ export class Resource$Monitoredresourcedescriptors {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListMonitoredResourceDescriptorsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListMonitoredResourceDescriptorsResponse>,
       callback?: BodyResponseCallback<
           Schema$ListMonitoredResourceDescriptorsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListMonitoredResourceDescriptorsResponse>,
       callback?: BodyResponseCallback<
@@ -3368,14 +3384,14 @@ export class Resource$Organizations$Exclusions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LogExclusion>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
       callback?: BodyResponseCallback<Schema$LogExclusion>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
       callback?: BodyResponseCallback<Schema$LogExclusion>):
       void|AxiosPromise<Schema$LogExclusion> {
@@ -3422,12 +3438,12 @@ export class Resource$Organizations$Exclusions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -3472,11 +3488,11 @@ export class Resource$Organizations$Exclusions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$LogExclusion>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$LogExclusion>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
       callback?: BodyResponseCallback<Schema$LogExclusion>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
       callback?: BodyResponseCallback<Schema$LogExclusion>):
       void|AxiosPromise<Schema$LogExclusion> {
@@ -3524,15 +3540,15 @@ export class Resource$Organizations$Exclusions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListExclusionsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListExclusionsResponse>,
       callback?: BodyResponseCallback<Schema$ListExclusionsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListExclusionsResponse>,
       callback?: BodyResponseCallback<Schema$ListExclusionsResponse>):
@@ -3582,14 +3598,14 @@ export class Resource$Organizations$Exclusions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LogExclusion>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
       callback?: BodyResponseCallback<Schema$LogExclusion>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
       callback?: BodyResponseCallback<Schema$LogExclusion>):
       void|AxiosPromise<Schema$LogExclusion> {
@@ -3649,12 +3665,12 @@ export class Resource$Organizations$Logs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -3702,14 +3718,14 @@ export class Resource$Organizations$Logs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListLogsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListLogsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListLogsResponse>,
       callback?: BodyResponseCallback<Schema$ListLogsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListLogsResponse>,
       callback?: BodyResponseCallback<Schema$ListLogsResponse>):
       void|AxiosPromise<Schema$ListLogsResponse> {
@@ -3772,12 +3788,14 @@ export class Resource$Organizations$Sinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>):
       void|AxiosPromise<Schema$LogSink> {
     if (typeof options === 'function') {
@@ -3823,12 +3841,12 @@ export class Resource$Organizations$Sinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -3873,10 +3891,12 @@ export class Resource$Organizations$Sinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>):
       void|AxiosPromise<Schema$LogSink> {
     if (typeof options === 'function') {
@@ -3923,14 +3943,14 @@ export class Resource$Organizations$Sinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListSinksResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListSinksResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListSinksResponse>,
       callback?: BodyResponseCallback<Schema$ListSinksResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListSinksResponse>,
       callback?: BodyResponseCallback<Schema$ListSinksResponse>):
       void|AxiosPromise<Schema$ListSinksResponse> {
@@ -3982,12 +4002,14 @@ export class Resource$Organizations$Sinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>):
       void|AxiosPromise<Schema$LogSink> {
     if (typeof options === 'function') {
@@ -4038,12 +4060,14 @@ export class Resource$Organizations$Sinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>):
       void|AxiosPromise<Schema$LogSink> {
     if (typeof options === 'function') {
@@ -4123,14 +4147,14 @@ export class Resource$Projects$Exclusions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LogExclusion>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
       callback?: BodyResponseCallback<Schema$LogExclusion>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
       callback?: BodyResponseCallback<Schema$LogExclusion>):
       void|AxiosPromise<Schema$LogExclusion> {
@@ -4177,12 +4201,12 @@ export class Resource$Projects$Exclusions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -4227,11 +4251,11 @@ export class Resource$Projects$Exclusions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$LogExclusion>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$LogExclusion>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
       callback?: BodyResponseCallback<Schema$LogExclusion>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
       callback?: BodyResponseCallback<Schema$LogExclusion>):
       void|AxiosPromise<Schema$LogExclusion> {
@@ -4279,15 +4303,15 @@ export class Resource$Projects$Exclusions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListExclusionsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListExclusionsResponse>,
       callback?: BodyResponseCallback<Schema$ListExclusionsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListExclusionsResponse>,
       callback?: BodyResponseCallback<Schema$ListExclusionsResponse>):
@@ -4337,14 +4361,14 @@ export class Resource$Projects$Exclusions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LogExclusion>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
       callback?: BodyResponseCallback<Schema$LogExclusion>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LogExclusion>,
       callback?: BodyResponseCallback<Schema$LogExclusion>):
       void|AxiosPromise<Schema$LogExclusion> {
@@ -4404,12 +4428,12 @@ export class Resource$Projects$Logs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -4457,14 +4481,14 @@ export class Resource$Projects$Logs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListLogsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListLogsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListLogsResponse>,
       callback?: BodyResponseCallback<Schema$ListLogsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListLogsResponse>,
       callback?: BodyResponseCallback<Schema$ListLogsResponse>):
       void|AxiosPromise<Schema$ListLogsResponse> {
@@ -4523,13 +4547,13 @@ export class Resource$Projects$Metrics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$LogMetric>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$LogMetric>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LogMetric>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogMetric>,
       callback?: BodyResponseCallback<Schema$LogMetric>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LogMetric>,
       callback?: BodyResponseCallback<Schema$LogMetric>):
       void|AxiosPromise<Schema$LogMetric> {
@@ -4576,12 +4600,12 @@ export class Resource$Projects$Metrics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -4626,11 +4650,11 @@ export class Resource$Projects$Metrics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$LogMetric>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LogMetric>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$LogMetric>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogMetric>,
       callback?: BodyResponseCallback<Schema$LogMetric>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LogMetric>,
       callback?: BodyResponseCallback<Schema$LogMetric>):
       void|AxiosPromise<Schema$LogMetric> {
@@ -4678,15 +4702,15 @@ export class Resource$Projects$Metrics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListLogMetricsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListLogMetricsResponse>,
       callback?: BodyResponseCallback<Schema$ListLogMetricsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListLogMetricsResponse>,
       callback?: BodyResponseCallback<Schema$ListLogMetricsResponse>):
@@ -4735,13 +4759,13 @@ export class Resource$Projects$Metrics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$LogMetric>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$LogMetric>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LogMetric>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogMetric>,
       callback?: BodyResponseCallback<Schema$LogMetric>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LogMetric>,
       callback?: BodyResponseCallback<Schema$LogMetric>):
       void|AxiosPromise<Schema$LogMetric> {
@@ -4804,12 +4828,14 @@ export class Resource$Projects$Sinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>):
       void|AxiosPromise<Schema$LogSink> {
     if (typeof options === 'function') {
@@ -4855,12 +4881,12 @@ export class Resource$Projects$Sinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -4905,10 +4931,12 @@ export class Resource$Projects$Sinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>):
       void|AxiosPromise<Schema$LogSink> {
     if (typeof options === 'function') {
@@ -4955,14 +4983,14 @@ export class Resource$Projects$Sinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListSinksResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListSinksResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListSinksResponse>,
       callback?: BodyResponseCallback<Schema$ListSinksResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListSinksResponse>,
       callback?: BodyResponseCallback<Schema$ListSinksResponse>):
       void|AxiosPromise<Schema$ListSinksResponse> {
@@ -5014,12 +5042,14 @@ export class Resource$Projects$Sinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>):
       void|AxiosPromise<Schema$LogSink> {
     if (typeof options === 'function') {
@@ -5070,12 +5100,14 @@ export class Resource$Projects$Sinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>):
       void|AxiosPromise<Schema$LogSink> {
     if (typeof options === 'function') {
@@ -5138,12 +5170,14 @@ export class Resource$Sinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>):
       void|AxiosPromise<Schema$LogSink> {
     if (typeof options === 'function') {
@@ -5189,12 +5223,12 @@ export class Resource$Sinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -5239,10 +5273,12 @@ export class Resource$Sinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>):
       void|AxiosPromise<Schema$LogSink> {
     if (typeof options === 'function') {
@@ -5289,14 +5325,14 @@ export class Resource$Sinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListSinksResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListSinksResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListSinksResponse>,
       callback?: BodyResponseCallback<Schema$ListSinksResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListSinksResponse>,
       callback?: BodyResponseCallback<Schema$ListSinksResponse>):
       void|AxiosPromise<Schema$ListSinksResponse> {
@@ -5348,12 +5384,14 @@ export class Resource$Sinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>):
       void|AxiosPromise<Schema$LogSink> {
     if (typeof options === 'function') {
diff --git a/src/apis/logging/v2beta1.ts b/src/apis/logging/v2beta1.ts
index 3d1b0c2373..45897473ac 100644
--- a/src/apis/logging/v2beta1.ts
+++ b/src/apis/logging/v2beta1.ts
@@ -466,10 +466,10 @@ export interface Schema$LogEntry {
    */
   receiveTimestamp: string;
   /**
-   * Required. The monitored resource associated with this log entry. Example: a
-   * log entry that reports a database error would be associated with the
-   * monitored resource designating the particular database that reported the
-   * error.
+   * Required. The primary monitored resource associated with this log entry.
+   * Example: a log entry that reports a database error would be associated with
+   * the monitored resource designating the particular database that reported
+   * the error.
    */
   resource: Schema$MonitoredResource;
   /**
@@ -1256,12 +1256,12 @@ export class Resource$Billingaccounts$Logs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1379,14 +1379,14 @@ export class Resource$Billingaccounts$Logs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListLogsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListLogsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListLogsResponse>,
       callback?: BodyResponseCallback<Schema$ListLogsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListLogsResponse>,
       callback?: BodyResponseCallback<Schema$ListLogsResponse>):
       void|AxiosPromise<Schema$ListLogsResponse> {
@@ -1513,15 +1513,15 @@ export class Resource$Entries {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListLogEntriesResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListLogEntriesResponse>,
       callback?: BodyResponseCallback<Schema$ListLogEntriesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListLogEntriesResponse>,
       callback?: BodyResponseCallback<Schema$ListLogEntriesResponse>):
@@ -1625,15 +1625,15 @@ export class Resource$Entries {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  write(params: any, options?: MethodOptions):
+  write(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$WriteLogEntriesResponse>;
   write(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$WriteLogEntriesResponse>,
       callback?: BodyResponseCallback<Schema$WriteLogEntriesResponse>): void;
   write(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$WriteLogEntriesResponse>,
       callback?: BodyResponseCallback<Schema$WriteLogEntriesResponse>):
@@ -1758,16 +1758,16 @@ export class Resource$Monitoredresourcedescriptors {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListMonitoredResourceDescriptorsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListMonitoredResourceDescriptorsResponse>,
       callback?: BodyResponseCallback<
           Schema$ListMonitoredResourceDescriptorsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListMonitoredResourceDescriptorsResponse>,
       callback?: BodyResponseCallback<
@@ -1905,12 +1905,12 @@ export class Resource$Organizations$Logs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2028,14 +2028,14 @@ export class Resource$Organizations$Logs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListLogsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListLogsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListLogsResponse>,
       callback?: BodyResponseCallback<Schema$ListLogsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListLogsResponse>,
       callback?: BodyResponseCallback<Schema$ListLogsResponse>):
       void|AxiosPromise<Schema$ListLogsResponse> {
@@ -2174,12 +2174,12 @@ export class Resource$Projects$Logs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2296,14 +2296,14 @@ export class Resource$Projects$Logs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListLogsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListLogsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListLogsResponse>,
       callback?: BodyResponseCallback<Schema$ListLogsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListLogsResponse>,
       callback?: BodyResponseCallback<Schema$ListLogsResponse>):
       void|AxiosPromise<Schema$ListLogsResponse> {
@@ -2421,13 +2421,13 @@ export class Resource$Projects$Metrics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$LogMetric>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$LogMetric>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LogMetric>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogMetric>,
       callback?: BodyResponseCallback<Schema$LogMetric>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LogMetric>,
       callback?: BodyResponseCallback<Schema$LogMetric>):
       void|AxiosPromise<Schema$LogMetric> {
@@ -2525,12 +2525,12 @@ export class Resource$Projects$Metrics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2630,11 +2630,11 @@ export class Resource$Projects$Metrics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$LogMetric>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LogMetric>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$LogMetric>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogMetric>,
       callback?: BodyResponseCallback<Schema$LogMetric>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LogMetric>,
       callback?: BodyResponseCallback<Schema$LogMetric>):
       void|AxiosPromise<Schema$LogMetric> {
@@ -2749,15 +2749,15 @@ export class Resource$Projects$Metrics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListLogMetricsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListLogMetricsResponse>,
       callback?: BodyResponseCallback<Schema$ListLogMetricsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListLogMetricsResponse>,
       callback?: BodyResponseCallback<Schema$ListLogMetricsResponse>):
@@ -2869,13 +2869,13 @@ export class Resource$Projects$Metrics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$LogMetric>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$LogMetric>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LogMetric>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogMetric>,
       callback?: BodyResponseCallback<Schema$LogMetric>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LogMetric>,
       callback?: BodyResponseCallback<Schema$LogMetric>):
       void|AxiosPromise<Schema$LogMetric> {
@@ -3000,12 +3000,14 @@ export class Resource$Projects$Sinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>):
       void|AxiosPromise<Schema$LogSink> {
     if (typeof options === 'function') {
@@ -3109,12 +3111,12 @@ export class Resource$Projects$Sinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -3218,10 +3220,12 @@ export class Resource$Projects$Sinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>):
       void|AxiosPromise<Schema$LogSink> {
     if (typeof options === 'function') {
@@ -3338,14 +3342,14 @@ export class Resource$Projects$Sinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListSinksResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListSinksResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListSinksResponse>,
       callback?: BodyResponseCallback<Schema$ListSinksResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListSinksResponse>,
       callback?: BodyResponseCallback<Schema$ListSinksResponse>):
       void|AxiosPromise<Schema$ListSinksResponse> {
@@ -3464,12 +3468,14 @@ export class Resource$Projects$Sinks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$LogSink>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogSink>,
       callback?: BodyResponseCallback<Schema$LogSink>):
       void|AxiosPromise<Schema$LogSink> {
     if (typeof options === 'function') {
diff --git a/src/apis/manufacturers/v1.ts b/src/apis/manufacturers/v1.ts
index 57ba67b409..9c57d16803 100644
--- a/src/apis/manufacturers/v1.ts
+++ b/src/apis/manufacturers/v1.ts
@@ -477,12 +477,12 @@ export class Resource$Accounts$Products {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -534,10 +534,12 @@ export class Resource$Accounts$Products {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Product>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Product>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Product>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Product>,
       callback?: BodyResponseCallback<Schema$Product>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Product>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Product>,
       callback?: BodyResponseCallback<Schema$Product>):
       void|AxiosPromise<Schema$Product> {
     if (typeof options === 'function') {
@@ -586,14 +588,14 @@ export class Resource$Accounts$Products {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListProductsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListProductsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListProductsResponse>,
       callback?: BodyResponseCallback<Schema$ListProductsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListProductsResponse>,
       callback?: BodyResponseCallback<Schema$ListProductsResponse>):
       void|AxiosPromise<Schema$ListProductsResponse> {
@@ -654,12 +656,12 @@ export class Resource$Accounts$Products {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
diff --git a/src/apis/mirror/v1.ts b/src/apis/mirror/v1.ts
index c7c9f206c6..ae1f4aa35b 100644
--- a/src/apis/mirror/v1.ts
+++ b/src/apis/mirror/v1.ts
@@ -735,12 +735,14 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Account>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Account>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>):
       void|AxiosPromise<Schema$Account> {
     if (typeof options === 'function') {
@@ -799,12 +801,12 @@ export class Resource$Contacts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -849,10 +851,12 @@ export class Resource$Contacts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Contact>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Contact>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Contact>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Contact>,
       callback?: BodyResponseCallback<Schema$Contact>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Contact>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Contact>,
       callback?: BodyResponseCallback<Schema$Contact>):
       void|AxiosPromise<Schema$Contact> {
     if (typeof options === 'function') {
@@ -898,12 +902,14 @@ export class Resource$Contacts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Contact>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Contact>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Contact>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Contact>,
       callback?: BodyResponseCallback<Schema$Contact>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Contact>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Contact>,
       callback?: BodyResponseCallback<Schema$Contact>):
       void|AxiosPromise<Schema$Contact> {
     if (typeof options === 'function') {
@@ -948,14 +954,14 @@ export class Resource$Contacts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ContactsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ContactsListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ContactsListResponse>,
       callback?: BodyResponseCallback<Schema$ContactsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ContactsListResponse>,
       callback?: BodyResponseCallback<Schema$ContactsListResponse>):
       void|AxiosPromise<Schema$ContactsListResponse> {
@@ -1003,12 +1009,14 @@ export class Resource$Contacts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Contact>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Contact>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Contact>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Contact>,
       callback?: BodyResponseCallback<Schema$Contact>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Contact>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Contact>,
       callback?: BodyResponseCallback<Schema$Contact>):
       void|AxiosPromise<Schema$Contact> {
     if (typeof options === 'function') {
@@ -1055,12 +1063,14 @@ export class Resource$Contacts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Contact>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Contact>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Contact>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Contact>,
       callback?: BodyResponseCallback<Schema$Contact>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Contact>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Contact>,
       callback?: BodyResponseCallback<Schema$Contact>):
       void|AxiosPromise<Schema$Contact> {
     if (typeof options === 'function') {
@@ -1118,10 +1128,11 @@ export class Resource$Locations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Location>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Location>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Location>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Location>,
       callback?: BodyResponseCallback<Schema$Location>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Location>,
       callback?: BodyResponseCallback<Schema$Location>):
       void|AxiosPromise<Schema$Location> {
@@ -1167,14 +1178,15 @@ export class Resource$Locations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LocationsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LocationsListResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$LocationsListResponse>,
       callback?: BodyResponseCallback<Schema$LocationsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$LocationsListResponse>,
       callback?: BodyResponseCallback<Schema$LocationsListResponse>):
@@ -1234,10 +1246,12 @@ export class Resource$Settings {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Setting>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Setting>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Setting>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Setting>,
       callback?: BodyResponseCallback<Schema$Setting>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Setting>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Setting>,
       callback?: BodyResponseCallback<Schema$Setting>):
       void|AxiosPromise<Schema$Setting> {
     if (typeof options === 'function') {
@@ -1295,12 +1309,12 @@ export class Resource$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1345,14 +1359,14 @@ export class Resource$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Subscription>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Subscription>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Subscription>,
       callback?: BodyResponseCallback<Schema$Subscription>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Subscription>,
       callback?: BodyResponseCallback<Schema$Subscription>):
       void|AxiosPromise<Schema$Subscription> {
@@ -1399,15 +1413,15 @@ export class Resource$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SubscriptionsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SubscriptionsListResponse>,
       callback?: BodyResponseCallback<Schema$SubscriptionsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SubscriptionsListResponse>,
       callback?: BodyResponseCallback<Schema$SubscriptionsListResponse>):
@@ -1456,14 +1470,14 @@ export class Resource$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Subscription>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Subscription>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Subscription>,
       callback?: BodyResponseCallback<Schema$Subscription>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Subscription>,
       callback?: BodyResponseCallback<Schema$Subscription>):
       void|AxiosPromise<Schema$Subscription> {
@@ -1524,12 +1538,12 @@ export class Resource$Timeline {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1574,11 +1588,11 @@ export class Resource$Timeline {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$TimelineItem>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TimelineItem>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$TimelineItem>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TimelineItem>,
       callback?: BodyResponseCallback<Schema$TimelineItem>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TimelineItem>,
       callback?: BodyResponseCallback<Schema$TimelineItem>):
       void|AxiosPromise<Schema$TimelineItem> {
@@ -1628,14 +1642,14 @@ export class Resource$Timeline {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TimelineItem>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TimelineItem>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TimelineItem>,
       callback?: BodyResponseCallback<Schema$TimelineItem>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TimelineItem>,
       callback?: BodyResponseCallback<Schema$TimelineItem>):
       void|AxiosPromise<Schema$TimelineItem> {
@@ -1690,14 +1704,14 @@ export class Resource$Timeline {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TimelineListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TimelineListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TimelineListResponse>,
       callback?: BodyResponseCallback<Schema$TimelineListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TimelineListResponse>,
       callback?: BodyResponseCallback<Schema$TimelineListResponse>):
       void|AxiosPromise<Schema$TimelineListResponse> {
@@ -1746,14 +1760,14 @@ export class Resource$Timeline {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TimelineItem>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TimelineItem>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TimelineItem>,
       callback?: BodyResponseCallback<Schema$TimelineItem>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TimelineItem>,
       callback?: BodyResponseCallback<Schema$TimelineItem>):
       void|AxiosPromise<Schema$TimelineItem> {
@@ -1804,14 +1818,14 @@ export class Resource$Timeline {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TimelineItem>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TimelineItem>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TimelineItem>,
       callback?: BodyResponseCallback<Schema$TimelineItem>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TimelineItem>,
       callback?: BodyResponseCallback<Schema$TimelineItem>):
       void|AxiosPromise<Schema$TimelineItem> {
@@ -1872,12 +1886,12 @@ export class Resource$Timeline$Attachments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1925,11 +1939,11 @@ export class Resource$Timeline$Attachments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Attachment>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Attachment>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Attachment>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Attachment>,
       callback?: BodyResponseCallback<Schema$Attachment>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Attachment>,
       callback?: BodyResponseCallback<Schema$Attachment>):
       void|AxiosPromise<Schema$Attachment> {
@@ -1980,13 +1994,14 @@ export class Resource$Timeline$Attachments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Attachment>;
+  insert(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Attachment>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Attachment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Attachment>,
       callback?: BodyResponseCallback<Schema$Attachment>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Attachment>,
       callback?: BodyResponseCallback<Schema$Attachment>):
       void|AxiosPromise<Schema$Attachment> {
@@ -2035,15 +2050,15 @@ export class Resource$Timeline$Attachments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AttachmentsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$AttachmentsListResponse>,
       callback?: BodyResponseCallback<Schema$AttachmentsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AttachmentsListResponse>,
       callback?: BodyResponseCallback<Schema$AttachmentsListResponse>):
diff --git a/src/apis/ml/v1.ts b/src/apis/ml/v1.ts
index 01701096e5..6a2aa035a6 100644
--- a/src/apis/ml/v1.ts
+++ b/src/apis/ml/v1.ts
@@ -1145,17 +1145,17 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getConfig(params: any, options?: MethodOptions):
+  getConfig(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudMlV1__GetConfigResponse>;
   getConfig(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudMlV1__GetConfigResponse>,
       callback?:
           BodyResponseCallback<Schema$GoogleCloudMlV1__GetConfigResponse>):
       void;
   getConfig(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudMlV1__GetConfigResponse>,
       callback?:
@@ -1210,14 +1210,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  predict(params: any, options?: MethodOptions):
+  predict(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleApi__HttpBody>;
   predict(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleApi__HttpBody>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleApi__HttpBody>,
       callback?: BodyResponseCallback<Schema$GoogleApi__HttpBody>): void;
   predict(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GoogleApi__HttpBody>,
       callback?: BodyResponseCallback<Schema$GoogleApi__HttpBody>):
       void|AxiosPromise<Schema$GoogleApi__HttpBody> {
@@ -1275,14 +1275,15 @@ export class Resource$Projects$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancel(params: any, options?: MethodOptions):
+  cancel(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleProtobuf__Empty>;
   cancel(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleProtobuf__Empty>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$GoogleProtobuf__Empty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobuf__Empty>): void;
   cancel(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleProtobuf__Empty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobuf__Empty>):
@@ -1330,14 +1331,14 @@ export class Resource$Projects$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudMlV1__Job>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleCloudMlV1__Job>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleCloudMlV1__Job>,
       callback?: BodyResponseCallback<Schema$GoogleCloudMlV1__Job>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GoogleCloudMlV1__Job>,
       callback?: BodyResponseCallback<Schema$GoogleCloudMlV1__Job>):
       void|AxiosPromise<Schema$GoogleCloudMlV1__Job> {
@@ -1383,12 +1384,12 @@ export class Resource$Projects$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$GoogleCloudMlV1__Job>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleCloudMlV1__Job>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleCloudMlV1__Job>,
       callback?: BodyResponseCallback<Schema$GoogleCloudMlV1__Job>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GoogleCloudMlV1__Job>,
       callback?: BodyResponseCallback<Schema$GoogleCloudMlV1__Job>):
       void|AxiosPromise<Schema$GoogleCloudMlV1__Job> {
@@ -1435,14 +1436,14 @@ export class Resource$Projects$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleIamV1__Policy>;
   getIamPolicy(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleIamV1__Policy>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleIamV1__Policy>,
       callback?: BodyResponseCallback<Schema$GoogleIamV1__Policy>): void;
   getIamPolicy(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GoogleIamV1__Policy>,
       callback?: BodyResponseCallback<Schema$GoogleIamV1__Policy>):
       void|AxiosPromise<Schema$GoogleIamV1__Policy> {
@@ -1493,16 +1494,16 @@ export class Resource$Projects$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudMlV1__ListJobsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudMlV1__ListJobsResponse>,
       callback?:
           BodyResponseCallback<Schema$GoogleCloudMlV1__ListJobsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudMlV1__ListJobsResponse>,
       callback?:
@@ -1554,14 +1555,14 @@ export class Resource$Projects$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleIamV1__Policy>;
   setIamPolicy(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleIamV1__Policy>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleIamV1__Policy>,
       callback?: BodyResponseCallback<Schema$GoogleIamV1__Policy>): void;
   setIamPolicy(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GoogleIamV1__Policy>,
       callback?: BodyResponseCallback<Schema$GoogleIamV1__Policy>):
       void|AxiosPromise<Schema$GoogleIamV1__Policy> {
@@ -1613,17 +1614,17 @@ export class Resource$Projects$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleIamV1__TestIamPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleIamV1__TestIamPermissionsResponse>,
       callback?:
           BodyResponseCallback<Schema$GoogleIamV1__TestIamPermissionsResponse>):
       void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleIamV1__TestIamPermissionsResponse>,
       callback?:
@@ -1687,13 +1688,13 @@ export class Resource$Projects$Locations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$GoogleCloudMlV1__Location>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudMlV1__Location>,
       callback?: BodyResponseCallback<Schema$GoogleCloudMlV1__Location>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudMlV1__Location>,
       callback?: BodyResponseCallback<Schema$GoogleCloudMlV1__Location>):
@@ -1743,17 +1744,17 @@ export class Resource$Projects$Locations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudMlV1__ListLocationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudMlV1__ListLocationsResponse>,
       callback?:
           BodyResponseCallback<Schema$GoogleCloudMlV1__ListLocationsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudMlV1__ListLocationsResponse>,
       callback?:
@@ -1822,15 +1823,15 @@ export class Resource$Projects$Models {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudMlV1__Model>;
   create(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudMlV1__Model>,
       callback?: BodyResponseCallback<Schema$GoogleCloudMlV1__Model>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudMlV1__Model>,
       callback?: BodyResponseCallback<Schema$GoogleCloudMlV1__Model>):
@@ -1880,16 +1881,16 @@ export class Resource$Projects$Models {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions):
+  delete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleLongrunning__Operation>;
   delete(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunning__Operation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunning__Operation>):
       void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunning__Operation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunning__Operation>):
@@ -1939,13 +1940,13 @@ export class Resource$Projects$Models {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$GoogleCloudMlV1__Model>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudMlV1__Model>,
       callback?: BodyResponseCallback<Schema$GoogleCloudMlV1__Model>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudMlV1__Model>,
       callback?: BodyResponseCallback<Schema$GoogleCloudMlV1__Model>):
@@ -1993,14 +1994,14 @@ export class Resource$Projects$Models {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleIamV1__Policy>;
   getIamPolicy(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleIamV1__Policy>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleIamV1__Policy>,
       callback?: BodyResponseCallback<Schema$GoogleIamV1__Policy>): void;
   getIamPolicy(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GoogleIamV1__Policy>,
       callback?: BodyResponseCallback<Schema$GoogleIamV1__Policy>):
       void|AxiosPromise<Schema$GoogleIamV1__Policy> {
@@ -2053,17 +2054,17 @@ export class Resource$Projects$Models {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudMlV1__ListModelsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudMlV1__ListModelsResponse>,
       callback?:
           BodyResponseCallback<Schema$GoogleCloudMlV1__ListModelsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudMlV1__ListModelsResponse>,
       callback?:
@@ -2117,16 +2118,16 @@ export class Resource$Projects$Models {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleLongrunning__Operation>;
   patch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunning__Operation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunning__Operation>):
       void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunning__Operation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunning__Operation>):
@@ -2176,14 +2177,14 @@ export class Resource$Projects$Models {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleIamV1__Policy>;
   setIamPolicy(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleIamV1__Policy>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleIamV1__Policy>,
       callback?: BodyResponseCallback<Schema$GoogleIamV1__Policy>): void;
   setIamPolicy(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GoogleIamV1__Policy>,
       callback?: BodyResponseCallback<Schema$GoogleIamV1__Policy>):
       void|AxiosPromise<Schema$GoogleIamV1__Policy> {
@@ -2235,17 +2236,17 @@ export class Resource$Projects$Models {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleIamV1__TestIamPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleIamV1__TestIamPermissionsResponse>,
       callback?:
           BodyResponseCallback<Schema$GoogleIamV1__TestIamPermissionsResponse>):
       void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleIamV1__TestIamPermissionsResponse>,
       callback?:
@@ -2314,16 +2315,16 @@ export class Resource$Projects$Models$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleLongrunning__Operation>;
   create(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunning__Operation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunning__Operation>):
       void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunning__Operation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunning__Operation>):
@@ -2375,16 +2376,16 @@ export class Resource$Projects$Models$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions):
+  delete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleLongrunning__Operation>;
   delete(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunning__Operation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunning__Operation>):
       void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunning__Operation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunning__Operation>):
@@ -2436,13 +2437,13 @@ export class Resource$Projects$Models$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$GoogleCloudMlV1__Version>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudMlV1__Version>,
       callback?: BodyResponseCallback<Schema$GoogleCloudMlV1__Version>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudMlV1__Version>,
       callback?: BodyResponseCallback<Schema$GoogleCloudMlV1__Version>):
@@ -2497,17 +2498,17 @@ export class Resource$Projects$Models$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudMlV1__ListVersionsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudMlV1__ListVersionsResponse>,
       callback?:
           BodyResponseCallback<Schema$GoogleCloudMlV1__ListVersionsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudMlV1__ListVersionsResponse>,
       callback?:
@@ -2561,16 +2562,16 @@ export class Resource$Projects$Models$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleLongrunning__Operation>;
   patch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunning__Operation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunning__Operation>):
       void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunning__Operation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunning__Operation>):
@@ -2623,15 +2624,15 @@ export class Resource$Projects$Models$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setDefault(params: any, options?: MethodOptions):
+  setDefault(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleCloudMlV1__Version>;
   setDefault(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudMlV1__Version>,
       callback?: BodyResponseCallback<Schema$GoogleCloudMlV1__Version>): void;
   setDefault(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleCloudMlV1__Version>,
       callback?: BodyResponseCallback<Schema$GoogleCloudMlV1__Version>):
@@ -2700,14 +2701,15 @@ export class Resource$Projects$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancel(params: any, options?: MethodOptions):
+  cancel(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleProtobuf__Empty>;
   cancel(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleProtobuf__Empty>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$GoogleProtobuf__Empty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobuf__Empty>): void;
   cancel(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleProtobuf__Empty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobuf__Empty>):
@@ -2757,14 +2759,15 @@ export class Resource$Projects$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions):
+  delete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleProtobuf__Empty>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleProtobuf__Empty>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$GoogleProtobuf__Empty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobuf__Empty>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleProtobuf__Empty>,
       callback?: BodyResponseCallback<Schema$GoogleProtobuf__Empty>):
@@ -2813,14 +2816,14 @@ export class Resource$Projects$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions):
+  get(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleLongrunning__Operation>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunning__Operation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunning__Operation>):
       void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunning__Operation>,
       callback?: BodyResponseCallback<Schema$GoogleLongrunning__Operation>):
@@ -2879,16 +2882,16 @@ export class Resource$Projects$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GoogleLongrunning__ListOperationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunning__ListOperationsResponse>,
       callback?: BodyResponseCallback<
           Schema$GoogleLongrunning__ListOperationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GoogleLongrunning__ListOperationsResponse>,
       callback?: BodyResponseCallback<
diff --git a/src/apis/monitoring/v3.ts b/src/apis/monitoring/v3.ts
index 12a25b5159..168b417560 100644
--- a/src/apis/monitoring/v3.ts
+++ b/src/apis/monitoring/v3.ts
@@ -1847,14 +1847,14 @@ export class Resource$Projects$Alertpolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AlertPolicy>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AlertPolicy>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AlertPolicy>,
       callback?: BodyResponseCallback<Schema$AlertPolicy>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AlertPolicy>,
       callback?: BodyResponseCallback<Schema$AlertPolicy>):
       void|AxiosPromise<Schema$AlertPolicy> {
@@ -1901,12 +1901,12 @@ export class Resource$Projects$Alertpolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1951,11 +1951,11 @@ export class Resource$Projects$Alertpolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$AlertPolicy>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AlertPolicy>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$AlertPolicy>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AlertPolicy>,
       callback?: BodyResponseCallback<Schema$AlertPolicy>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AlertPolicy>,
       callback?: BodyResponseCallback<Schema$AlertPolicy>):
       void|AxiosPromise<Schema$AlertPolicy> {
@@ -2005,15 +2005,15 @@ export class Resource$Projects$Alertpolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListAlertPoliciesResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListAlertPoliciesResponse>,
       callback?: BodyResponseCallback<Schema$ListAlertPoliciesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListAlertPoliciesResponse>,
       callback?: BodyResponseCallback<Schema$ListAlertPoliciesResponse>):
@@ -2066,13 +2066,14 @@ export class Resource$Projects$Alertpolicies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$AlertPolicy>;
+  patch(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$AlertPolicy>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AlertPolicy>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AlertPolicy>,
       callback?: BodyResponseCallback<Schema$AlertPolicy>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AlertPolicy>,
       callback?: BodyResponseCallback<Schema$AlertPolicy>):
       void|AxiosPromise<Schema$AlertPolicy> {
@@ -2176,16 +2177,16 @@ export class Resource$Projects$Collectdtimeseries {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreateCollectdTimeSeriesResponse>;
   create(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$CreateCollectdTimeSeriesResponse>,
       callback?: BodyResponseCallback<Schema$CreateCollectdTimeSeriesResponse>):
       void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$CreateCollectdTimeSeriesResponse>,
       callback?: BodyResponseCallback<Schema$CreateCollectdTimeSeriesResponse>):
@@ -2297,12 +2298,12 @@ export class Resource$Projects$Groups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Group>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Group>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Group>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Group>,
       callback?: BodyResponseCallback<Schema$Group>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Group>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Group>,
       callback?: BodyResponseCallback<Schema$Group>):
       void|AxiosPromise<Schema$Group> {
     if (typeof options === 'function') {
@@ -2393,12 +2394,12 @@ export class Resource$Projects$Groups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2489,10 +2490,10 @@ export class Resource$Projects$Groups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Group>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Group>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Group>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Group>,
       callback?: BodyResponseCallback<Schema$Group>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Group>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Group>,
       callback?: BodyResponseCallback<Schema$Group>):
       void|AxiosPromise<Schema$Group> {
     if (typeof options === 'function') {
@@ -2594,14 +2595,14 @@ export class Resource$Projects$Groups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListGroupsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListGroupsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListGroupsResponse>,
       callback?: BodyResponseCallback<Schema$ListGroupsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListGroupsResponse>,
       callback?: BodyResponseCallback<Schema$ListGroupsResponse>):
       void|AxiosPromise<Schema$ListGroupsResponse> {
@@ -2702,12 +2703,12 @@ export class Resource$Projects$Groups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Group>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Group>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Group>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Group>,
       callback?: BodyResponseCallback<Schema$Group>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Group>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Group>,
       callback?: BodyResponseCallback<Schema$Group>):
       void|AxiosPromise<Schema$Group> {
     if (typeof options === 'function') {
@@ -2821,15 +2822,15 @@ export class Resource$Projects$Groups$Members {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListGroupMembersResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListGroupMembersResponse>,
       callback?: BodyResponseCallback<Schema$ListGroupMembersResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListGroupMembersResponse>,
       callback?: BodyResponseCallback<Schema$ListGroupMembersResponse>):
@@ -2934,14 +2935,14 @@ export class Resource$Projects$Metricdescriptors {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$MetricDescriptor>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$MetricDescriptor>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$MetricDescriptor>,
       callback?: BodyResponseCallback<Schema$MetricDescriptor>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$MetricDescriptor>,
       callback?: BodyResponseCallback<Schema$MetricDescriptor>):
       void|AxiosPromise<Schema$MetricDescriptor> {
@@ -3034,12 +3035,12 @@ export class Resource$Projects$Metricdescriptors {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -3130,12 +3131,12 @@ export class Resource$Projects$Metricdescriptors {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$MetricDescriptor>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$MetricDescriptor>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$MetricDescriptor>,
       callback?: BodyResponseCallback<Schema$MetricDescriptor>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$MetricDescriptor>,
       callback?: BodyResponseCallback<Schema$MetricDescriptor>):
       void|AxiosPromise<Schema$MetricDescriptor> {
@@ -3237,16 +3238,16 @@ export class Resource$Projects$Metricdescriptors {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListMetricDescriptorsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListMetricDescriptorsResponse>,
       callback?: BodyResponseCallback<Schema$ListMetricDescriptorsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListMetricDescriptorsResponse>,
       callback?: BodyResponseCallback<Schema$ListMetricDescriptorsResponse>):
@@ -3356,14 +3357,14 @@ export class Resource$Projects$Monitoredresourcedescriptors {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions):
+  get(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$MonitoredResourceDescriptor>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$MonitoredResourceDescriptor>,
       callback?: BodyResponseCallback<Schema$MonitoredResourceDescriptor>):
       void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$MonitoredResourceDescriptor>,
       callback?: BodyResponseCallback<Schema$MonitoredResourceDescriptor>):
@@ -3468,16 +3469,16 @@ export class Resource$Projects$Monitoredresourcedescriptors {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListMonitoredResourceDescriptorsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListMonitoredResourceDescriptorsResponse>,
       callback?: BodyResponseCallback<
           Schema$ListMonitoredResourceDescriptorsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListMonitoredResourceDescriptorsResponse>,
       callback?: BodyResponseCallback<
@@ -3542,14 +3543,14 @@ export class Resource$Projects$Notificationchanneldescriptors {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions):
+  get(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$NotificationChannelDescriptor>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$NotificationChannelDescriptor>,
       callback?: BodyResponseCallback<Schema$NotificationChannelDescriptor>):
       void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$NotificationChannelDescriptor>,
       callback?: BodyResponseCallback<Schema$NotificationChannelDescriptor>):
@@ -3601,16 +3602,16 @@ export class Resource$Projects$Notificationchanneldescriptors {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListNotificationChannelDescriptorsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListNotificationChannelDescriptorsResponse>,
       callback?: BodyResponseCallback<
           Schema$ListNotificationChannelDescriptorsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListNotificationChannelDescriptorsResponse>,
       callback?: BodyResponseCallback<
@@ -3676,14 +3677,14 @@ export class Resource$Projects$Notificationchannels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$NotificationChannel>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$NotificationChannel>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$NotificationChannel>,
       callback?: BodyResponseCallback<Schema$NotificationChannel>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$NotificationChannel>,
       callback?: BodyResponseCallback<Schema$NotificationChannel>):
       void|AxiosPromise<Schema$NotificationChannel> {
@@ -3731,12 +3732,12 @@ export class Resource$Projects$Notificationchannels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -3785,12 +3786,12 @@ export class Resource$Projects$Notificationchannels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$NotificationChannel>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$NotificationChannel>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$NotificationChannel>,
       callback?: BodyResponseCallback<Schema$NotificationChannel>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$NotificationChannel>,
       callback?: BodyResponseCallback<Schema$NotificationChannel>):
       void|AxiosPromise<Schema$NotificationChannel> {
@@ -3854,16 +3855,16 @@ export class Resource$Projects$Notificationchannels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getVerificationCode(params: any, options?: MethodOptions):
+  getVerificationCode(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GetNotificationChannelVerificationCodeResponse>;
   getVerificationCode(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$GetNotificationChannelVerificationCodeResponse>,
       callback?: BodyResponseCallback<
           Schema$GetNotificationChannelVerificationCodeResponse>): void;
   getVerificationCode(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$GetNotificationChannelVerificationCodeResponse>,
       callback?: BodyResponseCallback<
@@ -3919,16 +3920,16 @@ export class Resource$Projects$Notificationchannels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListNotificationChannelsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListNotificationChannelsResponse>,
       callback?: BodyResponseCallback<Schema$ListNotificationChannelsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListNotificationChannelsResponse>,
       callback?: BodyResponseCallback<Schema$ListNotificationChannelsResponse>):
@@ -3981,14 +3982,14 @@ export class Resource$Projects$Notificationchannels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$NotificationChannel>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$NotificationChannel>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$NotificationChannel>,
       callback?: BodyResponseCallback<Schema$NotificationChannel>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$NotificationChannel>,
       callback?: BodyResponseCallback<Schema$NotificationChannel>):
       void|AxiosPromise<Schema$NotificationChannel> {
@@ -4036,13 +4037,13 @@ export class Resource$Projects$Notificationchannels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  sendVerificationCode(params: any, options?: MethodOptions):
+  sendVerificationCode(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Empty>;
   sendVerificationCode(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   sendVerificationCode(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -4091,14 +4092,14 @@ export class Resource$Projects$Notificationchannels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  verify(params: any, options?: MethodOptions):
+  verify(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$NotificationChannel>;
   verify(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$NotificationChannel>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$NotificationChannel>,
       callback?: BodyResponseCallback<Schema$NotificationChannel>): void;
   verify(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$NotificationChannel>,
       callback?: BodyResponseCallback<Schema$NotificationChannel>):
       void|AxiosPromise<Schema$NotificationChannel> {
@@ -4206,12 +4207,12 @@ export class Resource$Projects$Timeseries {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -4321,15 +4322,15 @@ export class Resource$Projects$Timeseries {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListTimeSeriesResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListTimeSeriesResponse>,
       callback?: BodyResponseCallback<Schema$ListTimeSeriesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListTimeSeriesResponse>,
       callback?: BodyResponseCallback<Schema$ListTimeSeriesResponse>):
@@ -4390,14 +4391,14 @@ export class Resource$Projects$Uptimecheckconfigs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$UptimeCheckConfig>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UptimeCheckConfig>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UptimeCheckConfig>,
       callback?: BodyResponseCallback<Schema$UptimeCheckConfig>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UptimeCheckConfig>,
       callback?: BodyResponseCallback<Schema$UptimeCheckConfig>):
       void|AxiosPromise<Schema$UptimeCheckConfig> {
@@ -4446,12 +4447,12 @@ export class Resource$Projects$Uptimecheckconfigs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -4496,12 +4497,12 @@ export class Resource$Projects$Uptimecheckconfigs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$UptimeCheckConfig>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UptimeCheckConfig>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UptimeCheckConfig>,
       callback?: BodyResponseCallback<Schema$UptimeCheckConfig>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UptimeCheckConfig>,
       callback?: BodyResponseCallback<Schema$UptimeCheckConfig>):
       void|AxiosPromise<Schema$UptimeCheckConfig> {
@@ -4550,16 +4551,16 @@ export class Resource$Projects$Uptimecheckconfigs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListUptimeCheckConfigsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListUptimeCheckConfigsResponse>,
       callback?: BodyResponseCallback<Schema$ListUptimeCheckConfigsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListUptimeCheckConfigsResponse>,
       callback?: BodyResponseCallback<Schema$ListUptimeCheckConfigsResponse>):
@@ -4614,14 +4615,14 @@ export class Resource$Projects$Uptimecheckconfigs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$UptimeCheckConfig>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UptimeCheckConfig>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UptimeCheckConfig>,
       callback?: BodyResponseCallback<Schema$UptimeCheckConfig>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UptimeCheckConfig>,
       callback?: BodyResponseCallback<Schema$UptimeCheckConfig>):
       void|AxiosPromise<Schema$UptimeCheckConfig> {
@@ -4681,15 +4682,15 @@ export class Resource$Uptimecheckips {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListUptimeCheckIpsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListUptimeCheckIpsResponse>,
       callback?: BodyResponseCallback<Schema$ListUptimeCheckIpsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListUptimeCheckIpsResponse>,
       callback?: BodyResponseCallback<Schema$ListUptimeCheckIpsResponse>):
diff --git a/src/apis/oauth2/v1.ts b/src/apis/oauth2/v1.ts
index d35e0bde0d..0c26d70aef 100644
--- a/src/apis/oauth2/v1.ts
+++ b/src/apis/oauth2/v1.ts
@@ -73,13 +73,13 @@ export class Oauth2 {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getCertForOpenIdConnect(params: any, options?: MethodOptions):
+  getCertForOpenIdConnect(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$X509>;
   getCertForOpenIdConnect(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$X509>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$X509>,
       callback?: BodyResponseCallback<Schema$X509>): void;
   getCertForOpenIdConnect(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$X509>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$X509>,
       callback?: BodyResponseCallback<Schema$X509>):
       void|AxiosPromise<Schema$X509> {
     if (typeof options === 'function') {
@@ -122,13 +122,13 @@ export class Oauth2 {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getCertForOpenIdConnectRaw(params: any, options?: MethodOptions):
+  getCertForOpenIdConnectRaw(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Raw>;
   getCertForOpenIdConnectRaw(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Raw>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Raw>,
       callback?: BodyResponseCallback<Schema$Raw>): void;
   getCertForOpenIdConnectRaw(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Raw>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Raw>,
       callback?: BodyResponseCallback<Schema$Raw>):
       void|AxiosPromise<Schema$Raw> {
     if (typeof options === 'function') {
@@ -173,12 +173,12 @@ export class Oauth2 {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getRobotJwk(params: any, options?: MethodOptions): AxiosPromise<Schema$Jwk>;
+  getRobotJwk(params?: any, options?: MethodOptions): AxiosPromise<Schema$Jwk>;
   getRobotJwk(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Jwk>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Jwk>,
       callback?: BodyResponseCallback<Schema$Jwk>): void;
   getRobotJwk(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Jwk>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Jwk>,
       callback?: BodyResponseCallback<Schema$Jwk>):
       void|AxiosPromise<Schema$Jwk> {
     if (typeof options === 'function') {
@@ -223,13 +223,13 @@ export class Oauth2 {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getRobotMetadataRaw(params: any, options?: MethodOptions):
+  getRobotMetadataRaw(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Raw>;
   getRobotMetadataRaw(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Raw>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Raw>,
       callback?: BodyResponseCallback<Schema$Raw>): void;
   getRobotMetadataRaw(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Raw>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Raw>,
       callback?: BodyResponseCallback<Schema$Raw>):
       void|AxiosPromise<Schema$Raw> {
     if (typeof options === 'function') {
@@ -274,13 +274,13 @@ export class Oauth2 {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getRobotMetadataX509(params: any, options?: MethodOptions):
+  getRobotMetadataX509(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$X509>;
   getRobotMetadataX509(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$X509>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$X509>,
       callback?: BodyResponseCallback<Schema$X509>): void;
   getRobotMetadataX509(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$X509>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$X509>,
       callback?: BodyResponseCallback<Schema$X509>):
       void|AxiosPromise<Schema$X509> {
     if (typeof options === 'function') {
@@ -327,14 +327,14 @@ export class Oauth2 {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  tokeninfo(params: any, options?: MethodOptions):
+  tokeninfo(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Tokeninfo>;
   tokeninfo(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Tokeninfo>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Tokeninfo>,
       callback?: BodyResponseCallback<Schema$Tokeninfo>): void;
   tokeninfo(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Tokeninfo>,
       callback?: BodyResponseCallback<Schema$Tokeninfo>):
       void|AxiosPromise<Schema$Tokeninfo> {
@@ -499,11 +499,11 @@ export class Resource$Userinfo {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Userinfoplus>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Userinfoplus>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Userinfoplus>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Userinfoplus>,
       callback?: BodyResponseCallback<Schema$Userinfoplus>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Userinfoplus>,
       callback?: BodyResponseCallback<Schema$Userinfoplus>):
       void|AxiosPromise<Schema$Userinfoplus> {
@@ -573,11 +573,11 @@ export class Resource$Userinfo$V2$Me {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Userinfoplus>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Userinfoplus>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Userinfoplus>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Userinfoplus>,
       callback?: BodyResponseCallback<Schema$Userinfoplus>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Userinfoplus>,
       callback?: BodyResponseCallback<Schema$Userinfoplus>):
       void|AxiosPromise<Schema$Userinfoplus> {
diff --git a/src/apis/oauth2/v2.ts b/src/apis/oauth2/v2.ts
index 156fa19059..ab93b01a3a 100644
--- a/src/apis/oauth2/v2.ts
+++ b/src/apis/oauth2/v2.ts
@@ -73,13 +73,13 @@ export class Oauth2 {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getCertForOpenIdConnect(params: any, options?: MethodOptions):
+  getCertForOpenIdConnect(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Jwk>;
   getCertForOpenIdConnect(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Jwk>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Jwk>,
       callback?: BodyResponseCallback<Schema$Jwk>): void;
   getCertForOpenIdConnect(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Jwk>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Jwk>,
       callback?: BodyResponseCallback<Schema$Jwk>):
       void|AxiosPromise<Schema$Jwk> {
     if (typeof options === 'function') {
@@ -125,14 +125,14 @@ export class Oauth2 {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  tokeninfo(params: any, options?: MethodOptions):
+  tokeninfo(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Tokeninfo>;
   tokeninfo(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Tokeninfo>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Tokeninfo>,
       callback?: BodyResponseCallback<Schema$Tokeninfo>): void;
   tokeninfo(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Tokeninfo>,
       callback?: BodyResponseCallback<Schema$Tokeninfo>):
       void|AxiosPromise<Schema$Tokeninfo> {
@@ -281,11 +281,11 @@ export class Resource$Userinfo {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Userinfoplus>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Userinfoplus>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Userinfoplus>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Userinfoplus>,
       callback?: BodyResponseCallback<Schema$Userinfoplus>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Userinfoplus>,
       callback?: BodyResponseCallback<Schema$Userinfoplus>):
       void|AxiosPromise<Schema$Userinfoplus> {
@@ -354,11 +354,11 @@ export class Resource$Userinfo$V2$Me {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Userinfoplus>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Userinfoplus>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Userinfoplus>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Userinfoplus>,
       callback?: BodyResponseCallback<Schema$Userinfoplus>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Userinfoplus>,
       callback?: BodyResponseCallback<Schema$Userinfoplus>):
       void|AxiosPromise<Schema$Userinfoplus> {
diff --git a/src/apis/oslogin/v1.ts b/src/apis/oslogin/v1.ts
index 8abe43b69e..cfb784e023 100644
--- a/src/apis/oslogin/v1.ts
+++ b/src/apis/oslogin/v1.ts
@@ -189,14 +189,14 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getLoginProfile(params: any, options?: MethodOptions):
+  getLoginProfile(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LoginProfile>;
   getLoginProfile(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LoginProfile>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LoginProfile>,
       callback?: BodyResponseCallback<Schema$LoginProfile>): void;
   getLoginProfile(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LoginProfile>,
       callback?: BodyResponseCallback<Schema$LoginProfile>):
       void|AxiosPromise<Schema$LoginProfile> {
@@ -247,15 +247,15 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  importSshPublicKey(params: any, options?: MethodOptions):
+  importSshPublicKey(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ImportSshPublicKeyResponse>;
   importSshPublicKey(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ImportSshPublicKeyResponse>,
       callback?: BodyResponseCallback<Schema$ImportSshPublicKeyResponse>): void;
   importSshPublicKey(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ImportSshPublicKeyResponse>,
       callback?: BodyResponseCallback<Schema$ImportSshPublicKeyResponse>):
@@ -314,12 +314,12 @@ export class Resource$Users$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -376,12 +376,12 @@ export class Resource$Users$Sshpublickeys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -426,11 +426,11 @@ export class Resource$Users$Sshpublickeys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$SshPublicKey>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SshPublicKey>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$SshPublicKey>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SshPublicKey>,
       callback?: BodyResponseCallback<Schema$SshPublicKey>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SshPublicKey>,
       callback?: BodyResponseCallback<Schema$SshPublicKey>):
       void|AxiosPromise<Schema$SshPublicKey> {
@@ -479,14 +479,14 @@ export class Resource$Users$Sshpublickeys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SshPublicKey>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SshPublicKey>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SshPublicKey>,
       callback?: BodyResponseCallback<Schema$SshPublicKey>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SshPublicKey>,
       callback?: BodyResponseCallback<Schema$SshPublicKey>):
       void|AxiosPromise<Schema$SshPublicKey> {
diff --git a/src/apis/oslogin/v1alpha.ts b/src/apis/oslogin/v1alpha.ts
index 3c066515ec..9d571dd1fb 100644
--- a/src/apis/oslogin/v1alpha.ts
+++ b/src/apis/oslogin/v1alpha.ts
@@ -189,14 +189,14 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getLoginProfile(params: any, options?: MethodOptions):
+  getLoginProfile(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LoginProfile>;
   getLoginProfile(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LoginProfile>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LoginProfile>,
       callback?: BodyResponseCallback<Schema$LoginProfile>): void;
   getLoginProfile(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LoginProfile>,
       callback?: BodyResponseCallback<Schema$LoginProfile>):
       void|AxiosPromise<Schema$LoginProfile> {
@@ -247,15 +247,15 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  importSshPublicKey(params: any, options?: MethodOptions):
+  importSshPublicKey(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ImportSshPublicKeyResponse>;
   importSshPublicKey(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ImportSshPublicKeyResponse>,
       callback?: BodyResponseCallback<Schema$ImportSshPublicKeyResponse>): void;
   importSshPublicKey(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ImportSshPublicKeyResponse>,
       callback?: BodyResponseCallback<Schema$ImportSshPublicKeyResponse>):
@@ -314,12 +314,12 @@ export class Resource$Users$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -376,12 +376,12 @@ export class Resource$Users$Sshpublickeys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -426,11 +426,11 @@ export class Resource$Users$Sshpublickeys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$SshPublicKey>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SshPublicKey>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$SshPublicKey>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SshPublicKey>,
       callback?: BodyResponseCallback<Schema$SshPublicKey>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SshPublicKey>,
       callback?: BodyResponseCallback<Schema$SshPublicKey>):
       void|AxiosPromise<Schema$SshPublicKey> {
@@ -479,14 +479,14 @@ export class Resource$Users$Sshpublickeys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SshPublicKey>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SshPublicKey>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SshPublicKey>,
       callback?: BodyResponseCallback<Schema$SshPublicKey>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SshPublicKey>,
       callback?: BodyResponseCallback<Schema$SshPublicKey>):
       void|AxiosPromise<Schema$SshPublicKey> {
diff --git a/src/apis/oslogin/v1beta.ts b/src/apis/oslogin/v1beta.ts
index 0a98ed9d43..0109ed1f09 100644
--- a/src/apis/oslogin/v1beta.ts
+++ b/src/apis/oslogin/v1beta.ts
@@ -189,14 +189,14 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getLoginProfile(params: any, options?: MethodOptions):
+  getLoginProfile(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LoginProfile>;
   getLoginProfile(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LoginProfile>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LoginProfile>,
       callback?: BodyResponseCallback<Schema$LoginProfile>): void;
   getLoginProfile(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LoginProfile>,
       callback?: BodyResponseCallback<Schema$LoginProfile>):
       void|AxiosPromise<Schema$LoginProfile> {
@@ -247,15 +247,15 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  importSshPublicKey(params: any, options?: MethodOptions):
+  importSshPublicKey(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ImportSshPublicKeyResponse>;
   importSshPublicKey(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ImportSshPublicKeyResponse>,
       callback?: BodyResponseCallback<Schema$ImportSshPublicKeyResponse>): void;
   importSshPublicKey(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ImportSshPublicKeyResponse>,
       callback?: BodyResponseCallback<Schema$ImportSshPublicKeyResponse>):
@@ -314,12 +314,12 @@ export class Resource$Users$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -376,12 +376,12 @@ export class Resource$Users$Sshpublickeys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -426,11 +426,11 @@ export class Resource$Users$Sshpublickeys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$SshPublicKey>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SshPublicKey>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$SshPublicKey>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SshPublicKey>,
       callback?: BodyResponseCallback<Schema$SshPublicKey>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SshPublicKey>,
       callback?: BodyResponseCallback<Schema$SshPublicKey>):
       void|AxiosPromise<Schema$SshPublicKey> {
@@ -479,14 +479,14 @@ export class Resource$Users$Sshpublickeys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SshPublicKey>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SshPublicKey>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SshPublicKey>,
       callback?: BodyResponseCallback<Schema$SshPublicKey>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SshPublicKey>,
       callback?: BodyResponseCallback<Schema$SshPublicKey>):
       void|AxiosPromise<Schema$SshPublicKey> {
diff --git a/src/apis/pagespeedonline/v1.ts b/src/apis/pagespeedonline/v1.ts
index ed2c3096fa..446f016926 100644
--- a/src/apis/pagespeedonline/v1.ts
+++ b/src/apis/pagespeedonline/v1.ts
@@ -149,13 +149,13 @@ export class Resource$Pagespeedapi {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  runpagespeed(params: any, options?: MethodOptions):
+  runpagespeed(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Result>;
   runpagespeed(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Result>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Result>,
       callback?: BodyResponseCallback<Schema$Result>): void;
   runpagespeed(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Result>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Result>,
       callback?: BodyResponseCallback<Schema$Result>):
       void|AxiosPromise<Schema$Result> {
     if (typeof options === 'function') {
diff --git a/src/apis/pagespeedonline/v2.ts b/src/apis/pagespeedonline/v2.ts
index 71ae16d884..298876d481 100644
--- a/src/apis/pagespeedonline/v2.ts
+++ b/src/apis/pagespeedonline/v2.ts
@@ -187,13 +187,13 @@ export class Resource$Pagespeedapi {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  runpagespeed(params: any, options?: MethodOptions):
+  runpagespeed(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Result>;
   runpagespeed(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Result>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Result>,
       callback?: BodyResponseCallback<Schema$Result>): void;
   runpagespeed(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Result>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Result>,
       callback?: BodyResponseCallback<Schema$Result>):
       void|AxiosPromise<Schema$Result> {
     if (typeof options === 'function') {
diff --git a/src/apis/pagespeedonline/v4.ts b/src/apis/pagespeedonline/v4.ts
index 1be6e803df..073f9e265f 100644
--- a/src/apis/pagespeedonline/v4.ts
+++ b/src/apis/pagespeedonline/v4.ts
@@ -195,16 +195,16 @@ export class Resource$Pagespeedapi {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  runpagespeed(params: any, options?: MethodOptions):
+  runpagespeed(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PagespeedApiPagespeedResponseV4>;
   runpagespeed(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$PagespeedApiPagespeedResponseV4>,
       callback?: BodyResponseCallback<Schema$PagespeedApiPagespeedResponseV4>):
       void;
   runpagespeed(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$PagespeedApiPagespeedResponseV4>,
       callback?: BodyResponseCallback<Schema$PagespeedApiPagespeedResponseV4>):
diff --git a/src/apis/partners/v2.ts b/src/apis/partners/v2.ts
index b48767bdb5..149353a961 100644
--- a/src/apis/partners/v2.ts
+++ b/src/apis/partners/v2.ts
@@ -1409,14 +1409,15 @@ export class Resource$Analytics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListAnalyticsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListAnalyticsResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ListAnalyticsResponse>,
       callback?: BodyResponseCallback<Schema$ListAnalyticsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListAnalyticsResponse>,
       callback?: BodyResponseCallback<Schema$ListAnalyticsResponse>):
@@ -1477,12 +1478,12 @@ export class Resource$Clientmessages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  log(params: any,
+  log(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$LogMessageResponse>;
-  log(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LogMessageResponse>,
+  log(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogMessageResponse>,
       callback?: BodyResponseCallback<Schema$LogMessageResponse>): void;
-  log(params: any,
+  log(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LogMessageResponse>,
       callback?: BodyResponseCallback<Schema$LogMessageResponse>):
       void|AxiosPromise<Schema$LogMessageResponse> {
@@ -1554,12 +1555,12 @@ export class Resource$Companies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$GetCompanyResponse>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GetCompanyResponse>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GetCompanyResponse>,
       callback?: BodyResponseCallback<Schema$GetCompanyResponse>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GetCompanyResponse>,
       callback?: BodyResponseCallback<Schema$GetCompanyResponse>):
       void|AxiosPromise<Schema$GetCompanyResponse> {
@@ -1630,14 +1631,15 @@ export class Resource$Companies {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListCompaniesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListCompaniesResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ListCompaniesResponse>,
       callback?: BodyResponseCallback<Schema$ListCompaniesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListCompaniesResponse>,
       callback?: BodyResponseCallback<Schema$ListCompaniesResponse>):
@@ -1696,14 +1698,14 @@ export class Resource$Companies$Leads {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreateLeadResponse>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CreateLeadResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CreateLeadResponse>,
       callback?: BodyResponseCallback<Schema$CreateLeadResponse>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CreateLeadResponse>,
       callback?: BodyResponseCallback<Schema$CreateLeadResponse>):
       void|AxiosPromise<Schema$CreateLeadResponse> {
@@ -1773,14 +1775,14 @@ export class Resource$Leads {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListLeadsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListLeadsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListLeadsResponse>,
       callback?: BodyResponseCallback<Schema$ListLeadsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListLeadsResponse>,
       callback?: BodyResponseCallback<Schema$ListLeadsResponse>):
       void|AxiosPromise<Schema$ListLeadsResponse> {
@@ -1846,14 +1848,14 @@ export class Resource$Offers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListOffersResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListOffersResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListOffersResponse>,
       callback?: BodyResponseCallback<Schema$ListOffersResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListOffersResponse>,
       callback?: BodyResponseCallback<Schema$ListOffersResponse>):
       void|AxiosPromise<Schema$ListOffersResponse> {
@@ -1921,15 +1923,15 @@ export class Resource$Offers$History {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListOffersHistoryResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListOffersHistoryResponse>,
       callback?: BodyResponseCallback<Schema$ListOffersHistoryResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListOffersHistoryResponse>,
       callback?: BodyResponseCallback<Schema$ListOffersHistoryResponse>):
@@ -1989,12 +1991,12 @@ export class Resource$Userevents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  log(params: any,
+  log(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$LogUserEventResponse>;
-  log(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LogUserEventResponse>,
+  log(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LogUserEventResponse>,
       callback?: BodyResponseCallback<Schema$LogUserEventResponse>): void;
-  log(params: any,
+  log(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LogUserEventResponse>,
       callback?: BodyResponseCallback<Schema$LogUserEventResponse>):
       void|AxiosPromise<Schema$LogUserEventResponse> {
@@ -2060,14 +2062,14 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  createCompanyRelation(params: any, options?: MethodOptions):
+  createCompanyRelation(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CompanyRelation>;
   createCompanyRelation(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CompanyRelation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CompanyRelation>,
       callback?: BodyResponseCallback<Schema$CompanyRelation>): void;
   createCompanyRelation(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CompanyRelation>,
       callback?: BodyResponseCallback<Schema$CompanyRelation>):
       void|AxiosPromise<Schema$CompanyRelation> {
@@ -2122,13 +2124,13 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  deleteCompanyRelation(params: any, options?: MethodOptions):
+  deleteCompanyRelation(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Empty>;
   deleteCompanyRelation(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   deleteCompanyRelation(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2182,10 +2184,10 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$User>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$User>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$User>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$User>,
       callback?: BodyResponseCallback<Schema$User>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$User>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$User>,
       callback?: BodyResponseCallback<Schema$User>):
       void|AxiosPromise<Schema$User> {
     if (typeof options === 'function') {
@@ -2238,14 +2240,14 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  updateProfile(params: any, options?: MethodOptions):
+  updateProfile(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$UserProfile>;
   updateProfile(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UserProfile>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UserProfile>,
       callback?: BodyResponseCallback<Schema$UserProfile>): void;
   updateProfile(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UserProfile>,
       callback?: BodyResponseCallback<Schema$UserProfile>):
       void|AxiosPromise<Schema$UserProfile> {
@@ -2309,15 +2311,15 @@ export class Resource$Userstates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListUserStatesResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListUserStatesResponse>,
       callback?: BodyResponseCallback<Schema$ListUserStatesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListUserStatesResponse>,
       callback?: BodyResponseCallback<Schema$ListUserStatesResponse>):
@@ -2383,15 +2385,15 @@ export class Resource$V2 {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getPartnersstatus(params: any, options?: MethodOptions):
+  getPartnersstatus(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GetPartnersStatusResponse>;
   getPartnersstatus(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GetPartnersStatusResponse>,
       callback?: BodyResponseCallback<Schema$GetPartnersStatusResponse>): void;
   getPartnersstatus(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GetPartnersStatusResponse>,
       callback?: BodyResponseCallback<Schema$GetPartnersStatusResponse>):
@@ -2447,13 +2449,15 @@ export class Resource$V2 {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  updateCompanies(params: any, options?: MethodOptions):
+  updateCompanies(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Company>;
   updateCompanies(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Company>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Company>,
       callback?: BodyResponseCallback<Schema$Company>): void;
   updateCompanies(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Company>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Company>,
       callback?: BodyResponseCallback<Schema$Company>):
       void|AxiosPromise<Schema$Company> {
     if (typeof options === 'function') {
@@ -2506,12 +2510,12 @@ export class Resource$V2 {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  updateLeads(params: any, options?: MethodOptions): AxiosPromise<Schema$Lead>;
+  updateLeads(params?: any, options?: MethodOptions): AxiosPromise<Schema$Lead>;
   updateLeads(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Lead>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Lead>,
       callback?: BodyResponseCallback<Schema$Lead>): void;
   updateLeads(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Lead>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Lead>,
       callback?: BodyResponseCallback<Schema$Lead>):
       void|AxiosPromise<Schema$Lead> {
     if (typeof options === 'function') {
diff --git a/src/apis/people/v1.ts b/src/apis/people/v1.ts
index 366ded7b13..174ed1a7a7 100644
--- a/src/apis/people/v1.ts
+++ b/src/apis/people/v1.ts
@@ -1302,16 +1302,16 @@ export class Resource$Contactgroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchGet(params: any, options?: MethodOptions):
+  batchGet(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BatchGetContactGroupsResponse>;
   batchGet(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$BatchGetContactGroupsResponse>,
       callback?: BodyResponseCallback<Schema$BatchGetContactGroupsResponse>):
       void;
   batchGet(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$BatchGetContactGroupsResponse>,
       callback?: BodyResponseCallback<Schema$BatchGetContactGroupsResponse>):
@@ -1360,14 +1360,14 @@ export class Resource$Contactgroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ContactGroup>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ContactGroup>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ContactGroup>,
       callback?: BodyResponseCallback<Schema$ContactGroup>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ContactGroup>,
       callback?: BodyResponseCallback<Schema$ContactGroup>):
       void|AxiosPromise<Schema$ContactGroup> {
@@ -1415,12 +1415,12 @@ export class Resource$Contactgroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1467,11 +1467,11 @@ export class Resource$Contactgroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$ContactGroup>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ContactGroup>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$ContactGroup>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ContactGroup>,
       callback?: BodyResponseCallback<Schema$ContactGroup>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ContactGroup>,
       callback?: BodyResponseCallback<Schema$ContactGroup>):
       void|AxiosPromise<Schema$ContactGroup> {
@@ -1520,15 +1520,15 @@ export class Resource$Contactgroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListContactGroupsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListContactGroupsResponse>,
       callback?: BodyResponseCallback<Schema$ListContactGroupsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListContactGroupsResponse>,
       callback?: BodyResponseCallback<Schema$ListContactGroupsResponse>):
@@ -1577,14 +1577,14 @@ export class Resource$Contactgroups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ContactGroup>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ContactGroup>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ContactGroup>,
       callback?: BodyResponseCallback<Schema$ContactGroup>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ContactGroup>,
       callback?: BodyResponseCallback<Schema$ContactGroup>):
       void|AxiosPromise<Schema$ContactGroup> {
@@ -1643,16 +1643,16 @@ export class Resource$Contactgroups$Members {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  modify(params: any, options?: MethodOptions):
+  modify(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ModifyContactGroupMembersResponse>;
   modify(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ModifyContactGroupMembersResponse>,
       callback?:
           BodyResponseCallback<Schema$ModifyContactGroupMembersResponse>): void;
   modify(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ModifyContactGroupMembersResponse>,
       callback?:
@@ -1719,13 +1719,13 @@ export class Resource$People {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  createContact(params: any, options?: MethodOptions):
+  createContact(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Person>;
   createContact(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Person>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Person>,
       callback?: BodyResponseCallback<Schema$Person>): void;
   createContact(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Person>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Person>,
       callback?: BodyResponseCallback<Schema$Person>):
       void|AxiosPromise<Schema$Person> {
     if (typeof options === 'function') {
@@ -1771,13 +1771,13 @@ export class Resource$People {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  deleteContact(params: any, options?: MethodOptions):
+  deleteContact(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Empty>;
   deleteContact(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   deleteContact(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1827,10 +1827,10 @@ export class Resource$People {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Person>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Person>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Person>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Person>,
       callback?: BodyResponseCallback<Schema$Person>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Person>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Person>,
       callback?: BodyResponseCallback<Schema$Person>):
       void|AxiosPromise<Schema$Person> {
     if (typeof options === 'function') {
@@ -1880,14 +1880,14 @@ export class Resource$People {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getBatchGet(params: any, options?: MethodOptions):
+  getBatchGet(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GetPeopleResponse>;
   getBatchGet(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GetPeopleResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GetPeopleResponse>,
       callback?: BodyResponseCallback<Schema$GetPeopleResponse>): void;
   getBatchGet(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GetPeopleResponse>,
       callback?: BodyResponseCallback<Schema$GetPeopleResponse>):
       void|AxiosPromise<Schema$GetPeopleResponse> {
@@ -1943,13 +1943,13 @@ export class Resource$People {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  updateContact(params: any, options?: MethodOptions):
+  updateContact(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Person>;
   updateContact(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Person>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Person>,
       callback?: BodyResponseCallback<Schema$Person>): void;
   updateContact(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Person>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Person>,
       callback?: BodyResponseCallback<Schema$Person>):
       void|AxiosPromise<Schema$Person> {
     if (typeof options === 'function') {
@@ -2015,15 +2015,15 @@ export class Resource$People$Connections {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListConnectionsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListConnectionsResponse>,
       callback?: BodyResponseCallback<Schema$ListConnectionsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListConnectionsResponse>,
       callback?: BodyResponseCallback<Schema$ListConnectionsResponse>):
diff --git a/src/apis/playcustomapp/v1.ts b/src/apis/playcustomapp/v1.ts
index 54f9c1e7b1..a9d5946798 100644
--- a/src/apis/playcustomapp/v1.ts
+++ b/src/apis/playcustomapp/v1.ts
@@ -118,13 +118,13 @@ export class Resource$Accounts$Customapps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$CustomApp>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$CustomApp>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CustomApp>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CustomApp>,
       callback?: BodyResponseCallback<Schema$CustomApp>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CustomApp>,
       callback?: BodyResponseCallback<Schema$CustomApp>):
       void|AxiosPromise<Schema$CustomApp> {
diff --git a/src/apis/plus/v1.ts b/src/apis/plus/v1.ts
index 0ad3b06239..9d9b404970 100644
--- a/src/apis/plus/v1.ts
+++ b/src/apis/plus/v1.ts
@@ -555,10 +555,11 @@ export class Resource$Activities {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Activity>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Activity>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Activity>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Activity>,
       callback?: BodyResponseCallback<Schema$Activity>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Activity>,
       callback?: BodyResponseCallback<Schema$Activity>):
       void|AxiosPromise<Schema$Activity> {
@@ -609,13 +610,14 @@ export class Resource$Activities {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$ActivityFeed>;
+  list(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$ActivityFeed>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ActivityFeed>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ActivityFeed>,
       callback?: BodyResponseCallback<Schema$ActivityFeed>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ActivityFeed>,
       callback?: BodyResponseCallback<Schema$ActivityFeed>):
       void|AxiosPromise<Schema$ActivityFeed> {
@@ -666,14 +668,14 @@ export class Resource$Activities {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  search(params: any, options?: MethodOptions):
+  search(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ActivityFeed>;
   search(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ActivityFeed>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ActivityFeed>,
       callback?: BodyResponseCallback<Schema$ActivityFeed>): void;
   search(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ActivityFeed>,
       callback?: BodyResponseCallback<Schema$ActivityFeed>):
       void|AxiosPromise<Schema$ActivityFeed> {
@@ -732,10 +734,12 @@ export class Resource$Comments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Comment>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Comment>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Comment>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
       callback?: BodyResponseCallback<Schema$Comment>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
       callback?: BodyResponseCallback<Schema$Comment>):
       void|AxiosPromise<Schema$Comment> {
     if (typeof options === 'function') {
@@ -784,13 +788,13 @@ export class Resource$Comments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$CommentFeed>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$CommentFeed>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CommentFeed>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CommentFeed>,
       callback?: BodyResponseCallback<Schema$CommentFeed>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CommentFeed>,
       callback?: BodyResponseCallback<Schema$CommentFeed>):
       void|AxiosPromise<Schema$CommentFeed> {
@@ -851,10 +855,10 @@ export class Resource$People {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Person>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Person>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Person>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Person>,
       callback?: BodyResponseCallback<Schema$Person>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Person>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Person>,
       callback?: BodyResponseCallback<Schema$Person>):
       void|AxiosPromise<Schema$Person> {
     if (typeof options === 'function') {
@@ -904,13 +908,13 @@ export class Resource$People {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$PeopleFeed>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$PeopleFeed>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PeopleFeed>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PeopleFeed>,
       callback?: BodyResponseCallback<Schema$PeopleFeed>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PeopleFeed>,
       callback?: BodyResponseCallback<Schema$PeopleFeed>):
       void|AxiosPromise<Schema$PeopleFeed> {
@@ -961,14 +965,14 @@ export class Resource$People {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listByActivity(params: any, options?: MethodOptions):
+  listByActivity(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PeopleFeed>;
   listByActivity(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PeopleFeed>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PeopleFeed>,
       callback?: BodyResponseCallback<Schema$PeopleFeed>): void;
   listByActivity(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PeopleFeed>,
       callback?: BodyResponseCallback<Schema$PeopleFeed>):
       void|AxiosPromise<Schema$PeopleFeed> {
@@ -1019,13 +1023,14 @@ export class Resource$People {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  search(params: any, options?: MethodOptions): AxiosPromise<Schema$PeopleFeed>;
+  search(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$PeopleFeed>;
   search(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PeopleFeed>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PeopleFeed>,
       callback?: BodyResponseCallback<Schema$PeopleFeed>): void;
   search(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PeopleFeed>,
       callback?: BodyResponseCallback<Schema$PeopleFeed>):
       void|AxiosPromise<Schema$PeopleFeed> {
diff --git a/src/apis/plusDomains/v1.ts b/src/apis/plusDomains/v1.ts
index dfc9b1c6bc..f6b33bda4a 100644
--- a/src/apis/plusDomains/v1.ts
+++ b/src/apis/plusDomains/v1.ts
@@ -778,10 +778,11 @@ export class Resource$Activities {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Activity>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Activity>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Activity>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Activity>,
       callback?: BodyResponseCallback<Schema$Activity>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Activity>,
       callback?: BodyResponseCallback<Schema$Activity>):
       void|AxiosPromise<Schema$Activity> {
@@ -830,12 +831,13 @@ export class Resource$Activities {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Activity>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Activity>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Activity>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Activity>,
       callback?: BodyResponseCallback<Schema$Activity>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Activity>,
       callback?: BodyResponseCallback<Schema$Activity>):
       void|AxiosPromise<Schema$Activity> {
@@ -886,13 +888,14 @@ export class Resource$Activities {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$ActivityFeed>;
+  list(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$ActivityFeed>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ActivityFeed>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ActivityFeed>,
       callback?: BodyResponseCallback<Schema$ActivityFeed>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ActivityFeed>,
       callback?: BodyResponseCallback<Schema$ActivityFeed>):
       void|AxiosPromise<Schema$ActivityFeed> {
@@ -954,14 +957,14 @@ export class Resource$Audiences {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AudiencesFeed>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AudiencesFeed>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AudiencesFeed>,
       callback?: BodyResponseCallback<Schema$AudiencesFeed>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AudiencesFeed>,
       callback?: BodyResponseCallback<Schema$AudiencesFeed>):
       void|AxiosPromise<Schema$AudiencesFeed> {
@@ -1023,12 +1026,12 @@ export class Resource$Circles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  addPeople(params: any, options?: MethodOptions): AxiosPromise<Schema$Circle>;
+  addPeople(params?: any, options?: MethodOptions): AxiosPromise<Schema$Circle>;
   addPeople(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Circle>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Circle>,
       callback?: BodyResponseCallback<Schema$Circle>): void;
   addPeople(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Circle>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Circle>,
       callback?: BodyResponseCallback<Schema$Circle>):
       void|AxiosPromise<Schema$Circle> {
     if (typeof options === 'function') {
@@ -1074,10 +1077,10 @@ export class Resource$Circles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Circle>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Circle>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Circle>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Circle>,
       callback?: BodyResponseCallback<Schema$Circle>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Circle>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Circle>,
       callback?: BodyResponseCallback<Schema$Circle>):
       void|AxiosPromise<Schema$Circle> {
     if (typeof options === 'function') {
@@ -1124,12 +1127,12 @@ export class Resource$Circles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Circle>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Circle>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Circle>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Circle>,
       callback?: BodyResponseCallback<Schema$Circle>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Circle>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Circle>,
       callback?: BodyResponseCallback<Schema$Circle>):
       void|AxiosPromise<Schema$Circle> {
     if (typeof options === 'function') {
@@ -1177,13 +1180,13 @@ export class Resource$Circles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$CircleFeed>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$CircleFeed>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CircleFeed>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CircleFeed>,
       callback?: BodyResponseCallback<Schema$CircleFeed>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CircleFeed>,
       callback?: BodyResponseCallback<Schema$CircleFeed>):
       void|AxiosPromise<Schema$CircleFeed> {
@@ -1231,12 +1234,12 @@ export class Resource$Circles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Circle>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Circle>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Circle>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Circle>,
       callback?: BodyResponseCallback<Schema$Circle>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Circle>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Circle>,
       callback?: BodyResponseCallback<Schema$Circle>):
       void|AxiosPromise<Schema$Circle> {
     if (typeof options === 'function') {
@@ -1282,12 +1285,12 @@ export class Resource$Circles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  remove(params: any, options?: MethodOptions): AxiosPromise<void>;
+  remove(params?: any, options?: MethodOptions): AxiosPromise<void>;
   remove(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   remove(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1334,12 +1337,12 @@ export class Resource$Circles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  removePeople(params: any, options?: MethodOptions): AxiosPromise<void>;
+  removePeople(params?: any, options?: MethodOptions): AxiosPromise<void>;
   removePeople(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   removePeople(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1385,12 +1388,12 @@ export class Resource$Circles {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Circle>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Circle>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Circle>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Circle>,
       callback?: BodyResponseCallback<Schema$Circle>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Circle>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Circle>,
       callback?: BodyResponseCallback<Schema$Circle>):
       void|AxiosPromise<Schema$Circle> {
     if (typeof options === 'function') {
@@ -1448,10 +1451,12 @@ export class Resource$Comments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Comment>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Comment>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Comment>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
       callback?: BodyResponseCallback<Schema$Comment>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
       callback?: BodyResponseCallback<Schema$Comment>):
       void|AxiosPromise<Schema$Comment> {
     if (typeof options === 'function') {
@@ -1498,12 +1503,14 @@ export class Resource$Comments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Comment>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Comment>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Comment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
       callback?: BodyResponseCallback<Schema$Comment>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
       callback?: BodyResponseCallback<Schema$Comment>):
       void|AxiosPromise<Schema$Comment> {
     if (typeof options === 'function') {
@@ -1552,13 +1559,13 @@ export class Resource$Comments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$CommentFeed>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$CommentFeed>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CommentFeed>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CommentFeed>,
       callback?: BodyResponseCallback<Schema$CommentFeed>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CommentFeed>,
       callback?: BodyResponseCallback<Schema$CommentFeed>):
       void|AxiosPromise<Schema$CommentFeed> {
@@ -1625,12 +1632,12 @@ export class Resource$Media {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Media>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Media>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Media>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Media>,
       callback?: BodyResponseCallback<Schema$Media>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Media>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Media>,
       callback?: BodyResponseCallback<Schema$Media>):
       void|AxiosPromise<Schema$Media> {
     if (typeof options === 'function') {
@@ -1692,10 +1699,10 @@ export class Resource$People {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Person>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Person>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Person>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Person>,
       callback?: BodyResponseCallback<Schema$Person>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Person>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Person>,
       callback?: BodyResponseCallback<Schema$Person>):
       void|AxiosPromise<Schema$Person> {
     if (typeof options === 'function') {
@@ -1745,13 +1752,13 @@ export class Resource$People {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$PeopleFeed>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$PeopleFeed>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PeopleFeed>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PeopleFeed>,
       callback?: BodyResponseCallback<Schema$PeopleFeed>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PeopleFeed>,
       callback?: BodyResponseCallback<Schema$PeopleFeed>):
       void|AxiosPromise<Schema$PeopleFeed> {
@@ -1803,14 +1810,14 @@ export class Resource$People {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listByActivity(params: any, options?: MethodOptions):
+  listByActivity(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PeopleFeed>;
   listByActivity(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PeopleFeed>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PeopleFeed>,
       callback?: BodyResponseCallback<Schema$PeopleFeed>): void;
   listByActivity(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PeopleFeed>,
       callback?: BodyResponseCallback<Schema$PeopleFeed>):
       void|AxiosPromise<Schema$PeopleFeed> {
@@ -1860,14 +1867,14 @@ export class Resource$People {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listByCircle(params: any, options?: MethodOptions):
+  listByCircle(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PeopleFeed>;
   listByCircle(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PeopleFeed>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PeopleFeed>,
       callback?: BodyResponseCallback<Schema$PeopleFeed>): void;
   listByCircle(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PeopleFeed>,
       callback?: BodyResponseCallback<Schema$PeopleFeed>):
       void|AxiosPromise<Schema$PeopleFeed> {
diff --git a/src/apis/poly/v1.ts b/src/apis/poly/v1.ts
index 1fa49aa16b..e15d08efbe 100644
--- a/src/apis/poly/v1.ts
+++ b/src/apis/poly/v1.ts
@@ -435,10 +435,10 @@ export class Resource$Assets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Asset>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Asset>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Asset>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Asset>,
       callback?: BodyResponseCallback<Schema$Asset>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Asset>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Asset>,
       callback?: BodyResponseCallback<Schema$Asset>):
       void|AxiosPromise<Schema$Asset> {
     if (typeof options === 'function') {
@@ -491,14 +491,14 @@ export class Resource$Assets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListAssetsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListAssetsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListAssetsResponse>,
       callback?: BodyResponseCallback<Schema$ListAssetsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListAssetsResponse>,
       callback?: BodyResponseCallback<Schema$ListAssetsResponse>):
       void|AxiosPromise<Schema$ListAssetsResponse> {
@@ -579,15 +579,15 @@ export class Resource$Users$Assets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListUserAssetsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListUserAssetsResponse>,
       callback?: BodyResponseCallback<Schema$ListUserAssetsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListUserAssetsResponse>,
       callback?: BodyResponseCallback<Schema$ListUserAssetsResponse>):
@@ -652,15 +652,15 @@ export class Resource$Users$Likedassets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListLikedAssetsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListLikedAssetsResponse>,
       callback?: BodyResponseCallback<Schema$ListLikedAssetsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListLikedAssetsResponse>,
       callback?: BodyResponseCallback<Schema$ListLikedAssetsResponse>):
diff --git a/src/apis/prediction/v1.2.ts b/src/apis/prediction/v1.2.ts
index ace1205bf7..98a7d1f7f5 100644
--- a/src/apis/prediction/v1.2.ts
+++ b/src/apis/prediction/v1.2.ts
@@ -79,12 +79,12 @@ export class Prediction {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  predict(params: any, options?: MethodOptions): AxiosPromise<Schema$Output>;
+  predict(params?: any, options?: MethodOptions): AxiosPromise<Schema$Output>;
   predict(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Output>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Output>,
       callback?: BodyResponseCallback<Schema$Output>): void;
   predict(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Output>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Output>,
       callback?: BodyResponseCallback<Schema$Output>):
       void|AxiosPromise<Schema$Output> {
     if (typeof options === 'function') {
@@ -170,12 +170,12 @@ export class Resource$Hostedmodels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  predict(params: any, options?: MethodOptions): AxiosPromise<Schema$Output>;
+  predict(params?: any, options?: MethodOptions): AxiosPromise<Schema$Output>;
   predict(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Output>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Output>,
       callback?: BodyResponseCallback<Schema$Output>): void;
   predict(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Output>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Output>,
       callback?: BodyResponseCallback<Schema$Output>):
       void|AxiosPromise<Schema$Output> {
     if (typeof options === 'function') {
@@ -234,12 +234,12 @@ export class Resource$Training {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -284,10 +284,11 @@ export class Resource$Training {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Training>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Training>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Training>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Training>,
       callback?: BodyResponseCallback<Schema$Training>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Training>,
       callback?: BodyResponseCallback<Schema$Training>):
       void|AxiosPromise<Schema$Training> {
@@ -335,12 +336,13 @@ export class Resource$Training {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Training>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Training>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Training>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Training>,
       callback?: BodyResponseCallback<Schema$Training>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Training>,
       callback?: BodyResponseCallback<Schema$Training>):
       void|AxiosPromise<Schema$Training> {
@@ -388,12 +390,13 @@ export class Resource$Training {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Training>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Training>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Training>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Training>,
       callback?: BodyResponseCallback<Schema$Training>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Training>,
       callback?: BodyResponseCallback<Schema$Training>):
       void|AxiosPromise<Schema$Training> {
diff --git a/src/apis/prediction/v1.3.ts b/src/apis/prediction/v1.3.ts
index d115c47100..7f8291c799 100644
--- a/src/apis/prediction/v1.3.ts
+++ b/src/apis/prediction/v1.3.ts
@@ -163,12 +163,12 @@ export class Resource$Hostedmodels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  predict(params: any, options?: MethodOptions): AxiosPromise<Schema$Output>;
+  predict(params?: any, options?: MethodOptions): AxiosPromise<Schema$Output>;
   predict(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Output>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Output>,
       callback?: BodyResponseCallback<Schema$Output>): void;
   predict(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Output>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Output>,
       callback?: BodyResponseCallback<Schema$Output>):
       void|AxiosPromise<Schema$Output> {
     if (typeof options === 'function') {
@@ -227,12 +227,12 @@ export class Resource$Training {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -277,10 +277,11 @@ export class Resource$Training {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Training>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Training>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Training>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Training>,
       callback?: BodyResponseCallback<Schema$Training>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Training>,
       callback?: BodyResponseCallback<Schema$Training>):
       void|AxiosPromise<Schema$Training> {
@@ -327,12 +328,13 @@ export class Resource$Training {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Training>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Training>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Training>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Training>,
       callback?: BodyResponseCallback<Schema$Training>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Training>,
       callback?: BodyResponseCallback<Schema$Training>):
       void|AxiosPromise<Schema$Training> {
@@ -380,12 +382,12 @@ export class Resource$Training {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  predict(params: any, options?: MethodOptions): AxiosPromise<Schema$Output>;
+  predict(params?: any, options?: MethodOptions): AxiosPromise<Schema$Output>;
   predict(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Output>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Output>,
       callback?: BodyResponseCallback<Schema$Output>): void;
   predict(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Output>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Output>,
       callback?: BodyResponseCallback<Schema$Output>):
       void|AxiosPromise<Schema$Output> {
     if (typeof options === 'function') {
@@ -432,12 +434,13 @@ export class Resource$Training {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Training>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Training>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Training>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Training>,
       callback?: BodyResponseCallback<Schema$Training>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Training>,
       callback?: BodyResponseCallback<Schema$Training>):
       void|AxiosPromise<Schema$Training> {
diff --git a/src/apis/prediction/v1.4.ts b/src/apis/prediction/v1.4.ts
index f7e0a7086c..199ab1d645 100644
--- a/src/apis/prediction/v1.4.ts
+++ b/src/apis/prediction/v1.4.ts
@@ -183,12 +183,12 @@ export class Resource$Hostedmodels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  predict(params: any, options?: MethodOptions): AxiosPromise<Schema$Output>;
+  predict(params?: any, options?: MethodOptions): AxiosPromise<Schema$Output>;
   predict(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Output>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Output>,
       callback?: BodyResponseCallback<Schema$Output>): void;
   predict(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Output>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Output>,
       callback?: BodyResponseCallback<Schema$Output>):
       void|AxiosPromise<Schema$Output> {
     if (typeof options === 'function') {
@@ -247,12 +247,12 @@ export class Resource$Trainedmodels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -297,10 +297,11 @@ export class Resource$Trainedmodels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Training>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Training>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Training>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Training>,
       callback?: BodyResponseCallback<Schema$Training>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Training>,
       callback?: BodyResponseCallback<Schema$Training>):
       void|AxiosPromise<Schema$Training> {
@@ -347,12 +348,13 @@ export class Resource$Trainedmodels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Training>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Training>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Training>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Training>,
       callback?: BodyResponseCallback<Schema$Training>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Training>,
       callback?: BodyResponseCallback<Schema$Training>):
       void|AxiosPromise<Schema$Training> {
@@ -400,12 +402,12 @@ export class Resource$Trainedmodels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  predict(params: any, options?: MethodOptions): AxiosPromise<Schema$Output>;
+  predict(params?: any, options?: MethodOptions): AxiosPromise<Schema$Output>;
   predict(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Output>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Output>,
       callback?: BodyResponseCallback<Schema$Output>): void;
   predict(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Output>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Output>,
       callback?: BodyResponseCallback<Schema$Output>):
       void|AxiosPromise<Schema$Output> {
     if (typeof options === 'function') {
@@ -452,12 +454,13 @@ export class Resource$Trainedmodels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Training>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Training>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Training>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Training>,
       callback?: BodyResponseCallback<Schema$Training>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Training>,
       callback?: BodyResponseCallback<Schema$Training>):
       void|AxiosPromise<Schema$Training> {
diff --git a/src/apis/prediction/v1.5.ts b/src/apis/prediction/v1.5.ts
index 76303c7df0..a558b64ce4 100644
--- a/src/apis/prediction/v1.5.ts
+++ b/src/apis/prediction/v1.5.ts
@@ -239,12 +239,12 @@ export class Resource$Hostedmodels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  predict(params: any, options?: MethodOptions): AxiosPromise<Schema$Output>;
+  predict(params?: any, options?: MethodOptions): AxiosPromise<Schema$Output>;
   predict(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Output>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Output>,
       callback?: BodyResponseCallback<Schema$Output>): void;
   predict(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Output>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Output>,
       callback?: BodyResponseCallback<Schema$Output>):
       void|AxiosPromise<Schema$Output> {
     if (typeof options === 'function') {
@@ -303,12 +303,14 @@ export class Resource$Trainedmodels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  analyze(params: any, options?: MethodOptions): AxiosPromise<Schema$Analyze>;
+  analyze(params?: any, options?: MethodOptions): AxiosPromise<Schema$Analyze>;
   analyze(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Analyze>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Analyze>,
       callback?: BodyResponseCallback<Schema$Analyze>): void;
   analyze(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Analyze>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Analyze>,
       callback?: BodyResponseCallback<Schema$Analyze>):
       void|AxiosPromise<Schema$Analyze> {
     if (typeof options === 'function') {
@@ -354,12 +356,12 @@ export class Resource$Trainedmodels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -404,10 +406,11 @@ export class Resource$Trainedmodels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Training>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Training>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Training>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Training>,
       callback?: BodyResponseCallback<Schema$Training>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Training>,
       callback?: BodyResponseCallback<Schema$Training>):
       void|AxiosPromise<Schema$Training> {
@@ -454,12 +457,13 @@ export class Resource$Trainedmodels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Training>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Training>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Training>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Training>,
       callback?: BodyResponseCallback<Schema$Training>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Training>,
       callback?: BodyResponseCallback<Schema$Training>):
       void|AxiosPromise<Schema$Training> {
@@ -507,12 +511,12 @@ export class Resource$Trainedmodels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$List>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$List>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$List>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$List>,
       callback?: BodyResponseCallback<Schema$List>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$List>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$List>,
       callback?: BodyResponseCallback<Schema$List>):
       void|AxiosPromise<Schema$List> {
     if (typeof options === 'function') {
@@ -559,12 +563,12 @@ export class Resource$Trainedmodels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  predict(params: any, options?: MethodOptions): AxiosPromise<Schema$Output>;
+  predict(params?: any, options?: MethodOptions): AxiosPromise<Schema$Output>;
   predict(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Output>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Output>,
       callback?: BodyResponseCallback<Schema$Output>): void;
   predict(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Output>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Output>,
       callback?: BodyResponseCallback<Schema$Output>):
       void|AxiosPromise<Schema$Output> {
     if (typeof options === 'function') {
@@ -611,12 +615,13 @@ export class Resource$Trainedmodels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Training>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Training>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Training>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Training>,
       callback?: BodyResponseCallback<Schema$Training>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Training>,
       callback?: BodyResponseCallback<Schema$Training>):
       void|AxiosPromise<Schema$Training> {
diff --git a/src/apis/prediction/v1.6.ts b/src/apis/prediction/v1.6.ts
index 90d4b58d1b..5fc8231ea0 100644
--- a/src/apis/prediction/v1.6.ts
+++ b/src/apis/prediction/v1.6.ts
@@ -322,12 +322,12 @@ export class Resource$Hostedmodels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  predict(params: any, options?: MethodOptions): AxiosPromise<Schema$Output>;
+  predict(params?: any, options?: MethodOptions): AxiosPromise<Schema$Output>;
   predict(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Output>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Output>,
       callback?: BodyResponseCallback<Schema$Output>): void;
   predict(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Output>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Output>,
       callback?: BodyResponseCallback<Schema$Output>):
       void|AxiosPromise<Schema$Output> {
     if (typeof options === 'function') {
@@ -443,12 +443,14 @@ export class Resource$Trainedmodels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  analyze(params: any, options?: MethodOptions): AxiosPromise<Schema$Analyze>;
+  analyze(params?: any, options?: MethodOptions): AxiosPromise<Schema$Analyze>;
   analyze(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Analyze>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Analyze>,
       callback?: BodyResponseCallback<Schema$Analyze>): void;
   analyze(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Analyze>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Analyze>,
       callback?: BodyResponseCallback<Schema$Analyze>):
       void|AxiosPromise<Schema$Analyze> {
     if (typeof options === 'function') {
@@ -549,12 +551,12 @@ export class Resource$Trainedmodels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -656,10 +658,12 @@ export class Resource$Trainedmodels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Insert2>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Insert2>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Insert2>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Insert2>,
       callback?: BodyResponseCallback<Schema$Insert2>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Insert2>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Insert2>,
       callback?: BodyResponseCallback<Schema$Insert2>):
       void|AxiosPromise<Schema$Insert2> {
     if (typeof options === 'function') {
@@ -763,12 +767,14 @@ export class Resource$Trainedmodels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Insert2>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Insert2>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Insert2>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Insert2>,
       callback?: BodyResponseCallback<Schema$Insert2>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Insert2>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Insert2>,
       callback?: BodyResponseCallback<Schema$Insert2>):
       void|AxiosPromise<Schema$Insert2> {
     if (typeof options === 'function') {
@@ -881,12 +887,12 @@ export class Resource$Trainedmodels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$List>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$List>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$List>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$List>,
       callback?: BodyResponseCallback<Schema$List>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$List>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$List>,
       callback?: BodyResponseCallback<Schema$List>):
       void|AxiosPromise<Schema$List> {
     if (typeof options === 'function') {
@@ -994,12 +1000,12 @@ export class Resource$Trainedmodels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  predict(params: any, options?: MethodOptions): AxiosPromise<Schema$Output>;
+  predict(params?: any, options?: MethodOptions): AxiosPromise<Schema$Output>;
   predict(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Output>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Output>,
       callback?: BodyResponseCallback<Schema$Output>): void;
   predict(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Output>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Output>,
       callback?: BodyResponseCallback<Schema$Output>):
       void|AxiosPromise<Schema$Output> {
     if (typeof options === 'function') {
@@ -1110,12 +1116,14 @@ export class Resource$Trainedmodels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Insert2>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Insert2>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Insert2>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Insert2>,
       callback?: BodyResponseCallback<Schema$Insert2>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Insert2>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Insert2>,
       callback?: BodyResponseCallback<Schema$Insert2>):
       void|AxiosPromise<Schema$Insert2> {
     if (typeof options === 'function') {
diff --git a/src/apis/proximitybeacon/v1beta1.ts b/src/apis/proximitybeacon/v1beta1.ts
index 4cdff8daa6..0736a61da2 100644
--- a/src/apis/proximitybeacon/v1beta1.ts
+++ b/src/apis/proximitybeacon/v1beta1.ts
@@ -585,16 +585,16 @@ export class Resource$Beaconinfo {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getforobserved(params: any, options?: MethodOptions):
+  getforobserved(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GetInfoForObservedBeaconsResponse>;
   getforobserved(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GetInfoForObservedBeaconsResponse>,
       callback?:
           BodyResponseCallback<Schema$GetInfoForObservedBeaconsResponse>): void;
   getforobserved(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GetInfoForObservedBeaconsResponse>,
       callback?:
@@ -669,12 +669,12 @@ export class Resource$Beacons {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  activate(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  activate(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   activate(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   activate(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -729,12 +729,12 @@ export class Resource$Beacons {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  deactivate(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  deactivate(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   deactivate(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   deactivate(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -788,13 +788,13 @@ export class Resource$Beacons {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  decommission(params: any, options?: MethodOptions):
+  decommission(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Empty>;
   decommission(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   decommission(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -848,12 +848,12 @@ export class Resource$Beacons {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -910,10 +910,10 @@ export class Resource$Beacons {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Beacon>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Beacon>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Beacon>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Beacon>,
       callback?: BodyResponseCallback<Schema$Beacon>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Beacon>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Beacon>,
       callback?: BodyResponseCallback<Schema$Beacon>):
       void|AxiosPromise<Schema$Beacon> {
     if (typeof options === 'function') {
@@ -968,14 +968,14 @@ export class Resource$Beacons {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListBeaconsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListBeaconsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListBeaconsResponse>,
       callback?: BodyResponseCallback<Schema$ListBeaconsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListBeaconsResponse>,
       callback?: BodyResponseCallback<Schema$ListBeaconsResponse>):
       void|AxiosPromise<Schema$ListBeaconsResponse> {
@@ -1028,12 +1028,12 @@ export class Resource$Beacons {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  register(params: any, options?: MethodOptions): AxiosPromise<Schema$Beacon>;
+  register(params?: any, options?: MethodOptions): AxiosPromise<Schema$Beacon>;
   register(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Beacon>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Beacon>,
       callback?: BodyResponseCallback<Schema$Beacon>): void;
   register(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Beacon>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Beacon>,
       callback?: BodyResponseCallback<Schema$Beacon>):
       void|AxiosPromise<Schema$Beacon> {
     if (typeof options === 'function') {
@@ -1091,12 +1091,12 @@ export class Resource$Beacons {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Beacon>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Beacon>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Beacon>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Beacon>,
       callback?: BodyResponseCallback<Schema$Beacon>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Beacon>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Beacon>,
       callback?: BodyResponseCallback<Schema$Beacon>):
       void|AxiosPromise<Schema$Beacon> {
     if (typeof options === 'function') {
@@ -1164,15 +1164,15 @@ export class Resource$Beacons$Attachments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchDelete(params: any, options?: MethodOptions):
+  batchDelete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DeleteAttachmentsResponse>;
   batchDelete(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$DeleteAttachmentsResponse>,
       callback?: BodyResponseCallback<Schema$DeleteAttachmentsResponse>): void;
   batchDelete(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$DeleteAttachmentsResponse>,
       callback?: BodyResponseCallback<Schema$DeleteAttachmentsResponse>):
@@ -1233,14 +1233,14 @@ export class Resource$Beacons$Attachments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BeaconAttachment>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BeaconAttachment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BeaconAttachment>,
       callback?: BodyResponseCallback<Schema$BeaconAttachment>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BeaconAttachment>,
       callback?: BodyResponseCallback<Schema$BeaconAttachment>):
       void|AxiosPromise<Schema$BeaconAttachment> {
@@ -1296,12 +1296,12 @@ export class Resource$Beacons$Attachments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1358,16 +1358,16 @@ export class Resource$Beacons$Attachments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListBeaconAttachmentsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListBeaconAttachmentsResponse>,
       callback?: BodyResponseCallback<Schema$ListBeaconAttachmentsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListBeaconAttachmentsResponse>,
       callback?: BodyResponseCallback<Schema$ListBeaconAttachmentsResponse>):
@@ -1438,15 +1438,15 @@ export class Resource$Beacons$Diagnostics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListDiagnosticsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListDiagnosticsResponse>,
       callback?: BodyResponseCallback<Schema$ListDiagnosticsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListDiagnosticsResponse>,
       callback?: BodyResponseCallback<Schema$ListDiagnosticsResponse>):
@@ -1514,15 +1514,15 @@ export class Resource$Namespaces {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListNamespacesResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListNamespacesResponse>,
       callback?: BodyResponseCallback<Schema$ListNamespacesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListNamespacesResponse>,
       callback?: BodyResponseCallback<Schema$ListNamespacesResponse>):
@@ -1574,13 +1574,13 @@ export class Resource$Namespaces {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Namespace>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Namespace>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Namespace>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Namespace>,
       callback?: BodyResponseCallback<Schema$Namespace>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Namespace>,
       callback?: BodyResponseCallback<Schema$Namespace>):
       void|AxiosPromise<Schema$Namespace> {
@@ -1645,16 +1645,16 @@ export class Resource$V1beta1 {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getEidparams(params: any, options?: MethodOptions):
+  getEidparams(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$EphemeralIdRegistrationParams>;
   getEidparams(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$EphemeralIdRegistrationParams>,
       callback?: BodyResponseCallback<Schema$EphemeralIdRegistrationParams>):
       void;
   getEidparams(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$EphemeralIdRegistrationParams>,
       callback?: BodyResponseCallback<Schema$EphemeralIdRegistrationParams>):
diff --git a/src/apis/pubsub/v1.ts b/src/apis/pubsub/v1.ts
index 62b226d96d..8662fa71c6 100644
--- a/src/apis/pubsub/v1.ts
+++ b/src/apis/pubsub/v1.ts
@@ -627,12 +627,13 @@ export class Resource$Projects$Snapshots {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Snapshot>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Snapshot>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Snapshot>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Snapshot>,
       callback?: BodyResponseCallback<Schema$Snapshot>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Snapshot>,
       callback?: BodyResponseCallback<Schema$Snapshot>):
       void|AxiosPromise<Schema$Snapshot> {
@@ -682,12 +683,12 @@ export class Resource$Projects$Snapshots {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -733,10 +734,11 @@ export class Resource$Projects$Snapshots {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Snapshot>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Snapshot>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Snapshot>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Snapshot>,
       callback?: BodyResponseCallback<Schema$Snapshot>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Snapshot>,
       callback?: BodyResponseCallback<Schema$Snapshot>):
       void|AxiosPromise<Schema$Snapshot> {
@@ -837,13 +839,13 @@ export class Resource$Projects$Snapshots {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -892,14 +894,15 @@ export class Resource$Projects$Snapshots {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListSnapshotsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListSnapshotsResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ListSnapshotsResponse>,
       callback?: BodyResponseCallback<Schema$ListSnapshotsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListSnapshotsResponse>,
       callback?: BodyResponseCallback<Schema$ListSnapshotsResponse>):
@@ -950,12 +953,13 @@ export class Resource$Projects$Snapshots {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Snapshot>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Snapshot>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Snapshot>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Snapshot>,
       callback?: BodyResponseCallback<Schema$Snapshot>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Snapshot>,
       callback?: BodyResponseCallback<Schema$Snapshot>):
       void|AxiosPromise<Schema$Snapshot> {
@@ -1061,13 +1065,13 @@ export class Resource$Projects$Snapshots {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -1175,15 +1179,15 @@ export class Resource$Projects$Snapshots {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestIamPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>):
@@ -1303,12 +1307,13 @@ export class Resource$Projects$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  acknowledge(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  acknowledge(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Empty>;
   acknowledge(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   acknowledge(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1429,14 +1434,14 @@ export class Resource$Projects$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Subscription>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Subscription>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Subscription>,
       callback?: BodyResponseCallback<Schema$Subscription>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Subscription>,
       callback?: BodyResponseCallback<Schema$Subscription>):
       void|AxiosPromise<Schema$Subscription> {
@@ -1537,12 +1542,12 @@ export class Resource$Projects$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1641,11 +1646,11 @@ export class Resource$Projects$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Subscription>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Subscription>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Subscription>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Subscription>,
       callback?: BodyResponseCallback<Schema$Subscription>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Subscription>,
       callback?: BodyResponseCallback<Schema$Subscription>):
       void|AxiosPromise<Schema$Subscription> {
@@ -1744,13 +1749,13 @@ export class Resource$Projects$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -1865,15 +1870,15 @@ export class Resource$Projects$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListSubscriptionsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListSubscriptionsResponse>,
       callback?: BodyResponseCallback<Schema$ListSubscriptionsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListSubscriptionsResponse>,
       callback?: BodyResponseCallback<Schema$ListSubscriptionsResponse>):
@@ -1981,13 +1986,13 @@ export class Resource$Projects$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  modifyAckDeadline(params: any, options?: MethodOptions):
+  modifyAckDeadline(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Empty>;
   modifyAckDeadline(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   modifyAckDeadline(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2093,13 +2098,13 @@ export class Resource$Projects$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  modifyPushConfig(params: any, options?: MethodOptions):
+  modifyPushConfig(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Empty>;
   modifyPushConfig(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   modifyPushConfig(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2147,14 +2152,14 @@ export class Resource$Projects$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Subscription>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Subscription>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Subscription>,
       callback?: BodyResponseCallback<Schema$Subscription>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Subscription>,
       callback?: BodyResponseCallback<Schema$Subscription>):
       void|AxiosPromise<Schema$Subscription> {
@@ -2262,13 +2267,14 @@ export class Resource$Projects$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  pull(params: any, options?: MethodOptions): AxiosPromise<Schema$PullResponse>;
+  pull(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$PullResponse>;
   pull(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PullResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PullResponse>,
       callback?: BodyResponseCallback<Schema$PullResponse>): void;
   pull(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PullResponse>,
       callback?: BodyResponseCallback<Schema$PullResponse>):
       void|AxiosPromise<Schema$PullResponse> {
@@ -2318,13 +2324,14 @@ export class Resource$Projects$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  seek(params: any, options?: MethodOptions): AxiosPromise<Schema$SeekResponse>;
+  seek(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$SeekResponse>;
   seek(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SeekResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SeekResponse>,
       callback?: BodyResponseCallback<Schema$SeekResponse>): void;
   seek(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SeekResponse>,
       callback?: BodyResponseCallback<Schema$SeekResponse>):
       void|AxiosPromise<Schema$SeekResponse> {
@@ -2429,13 +2436,13 @@ export class Resource$Projects$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -2543,15 +2550,15 @@ export class Resource$Projects$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestIamPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>):
@@ -2684,12 +2691,12 @@ export class Resource$Projects$Topics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Topic>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Topic>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Topic>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Topic>,
       callback?: BodyResponseCallback<Schema$Topic>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Topic>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Topic>,
       callback?: BodyResponseCallback<Schema$Topic>):
       void|AxiosPromise<Schema$Topic> {
     if (typeof options === 'function') {
@@ -2789,12 +2796,12 @@ export class Resource$Projects$Topics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2893,10 +2900,10 @@ export class Resource$Projects$Topics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Topic>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Topic>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Topic>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Topic>,
       callback?: BodyResponseCallback<Schema$Topic>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Topic>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Topic>,
       callback?: BodyResponseCallback<Schema$Topic>):
       void|AxiosPromise<Schema$Topic> {
     if (typeof options === 'function') {
@@ -2996,13 +3003,13 @@ export class Resource$Projects$Topics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -3116,14 +3123,14 @@ export class Resource$Projects$Topics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListTopicsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListTopicsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListTopicsResponse>,
       callback?: BodyResponseCallback<Schema$ListTopicsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListTopicsResponse>,
       callback?: BodyResponseCallback<Schema$ListTopicsResponse>):
       void|AxiosPromise<Schema$ListTopicsResponse> {
@@ -3231,14 +3238,14 @@ export class Resource$Projects$Topics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  publish(params: any, options?: MethodOptions):
+  publish(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PublishResponse>;
   publish(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PublishResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PublishResponse>,
       callback?: BodyResponseCallback<Schema$PublishResponse>): void;
   publish(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PublishResponse>,
       callback?: BodyResponseCallback<Schema$PublishResponse>):
       void|AxiosPromise<Schema$PublishResponse> {
@@ -3345,13 +3352,13 @@ export class Resource$Projects$Topics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -3459,15 +3466,15 @@ export class Resource$Projects$Topics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestIamPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>):
@@ -3529,15 +3536,15 @@ export class Resource$Projects$Topics$Snapshots {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListTopicSnapshotsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListTopicSnapshotsResponse>,
       callback?: BodyResponseCallback<Schema$ListTopicSnapshotsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListTopicSnapshotsResponse>,
       callback?: BodyResponseCallback<Schema$ListTopicSnapshotsResponse>):
@@ -3667,16 +3674,16 @@ export class Resource$Projects$Topics$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListTopicSubscriptionsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListTopicSubscriptionsResponse>,
       callback?: BodyResponseCallback<Schema$ListTopicSubscriptionsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListTopicSubscriptionsResponse>,
       callback?: BodyResponseCallback<Schema$ListTopicSubscriptionsResponse>):
diff --git a/src/apis/pubsub/v1beta1a.ts b/src/apis/pubsub/v1beta1a.ts
index b5d8ef6cff..422f7744ca 100644
--- a/src/apis/pubsub/v1beta1a.ts
+++ b/src/apis/pubsub/v1beta1a.ts
@@ -423,12 +423,13 @@ export class Resource$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  acknowledge(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  acknowledge(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Empty>;
   acknowledge(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   acknowledge(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -478,14 +479,14 @@ export class Resource$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Subscription>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Subscription>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Subscription>,
       callback?: BodyResponseCallback<Schema$Subscription>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Subscription>,
       callback?: BodyResponseCallback<Schema$Subscription>):
       void|AxiosPromise<Schema$Subscription> {
@@ -534,12 +535,12 @@ export class Resource$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -585,11 +586,11 @@ export class Resource$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Subscription>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Subscription>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Subscription>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Subscription>,
       callback?: BodyResponseCallback<Schema$Subscription>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Subscription>,
       callback?: BodyResponseCallback<Schema$Subscription>):
       void|AxiosPromise<Schema$Subscription> {
@@ -638,15 +639,15 @@ export class Resource$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListSubscriptionsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListSubscriptionsResponse>,
       callback?: BodyResponseCallback<Schema$ListSubscriptionsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListSubscriptionsResponse>,
       callback?: BodyResponseCallback<Schema$ListSubscriptionsResponse>):
@@ -694,13 +695,13 @@ export class Resource$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  modifyAckDeadline(params: any, options?: MethodOptions):
+  modifyAckDeadline(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Empty>;
   modifyAckDeadline(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   modifyAckDeadline(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -750,13 +751,13 @@ export class Resource$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  modifyPushConfig(params: any, options?: MethodOptions):
+  modifyPushConfig(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Empty>;
   modifyPushConfig(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   modifyPushConfig(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -806,13 +807,14 @@ export class Resource$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  pull(params: any, options?: MethodOptions): AxiosPromise<Schema$PullResponse>;
+  pull(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$PullResponse>;
   pull(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PullResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PullResponse>,
       callback?: BodyResponseCallback<Schema$PullResponse>): void;
   pull(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PullResponse>,
       callback?: BodyResponseCallback<Schema$PullResponse>):
       void|AxiosPromise<Schema$PullResponse> {
@@ -861,14 +863,14 @@ export class Resource$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  pullBatch(params: any, options?: MethodOptions):
+  pullBatch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PullBatchResponse>;
   pullBatch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PullBatchResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PullBatchResponse>,
       callback?: BodyResponseCallback<Schema$PullBatchResponse>): void;
   pullBatch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PullBatchResponse>,
       callback?: BodyResponseCallback<Schema$PullBatchResponse>):
       void|AxiosPromise<Schema$PullBatchResponse> {
@@ -927,12 +929,12 @@ export class Resource$Topics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Topic>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Topic>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Topic>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Topic>,
       callback?: BodyResponseCallback<Schema$Topic>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Topic>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Topic>,
       callback?: BodyResponseCallback<Schema$Topic>):
       void|AxiosPromise<Schema$Topic> {
     if (typeof options === 'function') {
@@ -979,12 +981,12 @@ export class Resource$Topics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1032,10 +1034,10 @@ export class Resource$Topics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Topic>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Topic>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Topic>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Topic>,
       callback?: BodyResponseCallback<Schema$Topic>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Topic>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Topic>,
       callback?: BodyResponseCallback<Schema$Topic>):
       void|AxiosPromise<Schema$Topic> {
     if (typeof options === 'function') {
@@ -1083,14 +1085,14 @@ export class Resource$Topics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListTopicsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListTopicsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListTopicsResponse>,
       callback?: BodyResponseCallback<Schema$ListTopicsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListTopicsResponse>,
       callback?: BodyResponseCallback<Schema$ListTopicsResponse>):
       void|AxiosPromise<Schema$ListTopicsResponse> {
@@ -1137,12 +1139,12 @@ export class Resource$Topics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  publish(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  publish(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   publish(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   publish(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1189,14 +1191,14 @@ export class Resource$Topics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  publishBatch(params: any, options?: MethodOptions):
+  publishBatch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PublishBatchResponse>;
   publishBatch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PublishBatchResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PublishBatchResponse>,
       callback?: BodyResponseCallback<Schema$PublishBatchResponse>): void;
   publishBatch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PublishBatchResponse>,
       callback?: BodyResponseCallback<Schema$PublishBatchResponse>):
       void|AxiosPromise<Schema$PublishBatchResponse> {
diff --git a/src/apis/pubsub/v1beta2.ts b/src/apis/pubsub/v1beta2.ts
index 21327fdb63..70aa01cd43 100644
--- a/src/apis/pubsub/v1beta2.ts
+++ b/src/apis/pubsub/v1beta2.ts
@@ -477,12 +477,13 @@ export class Resource$Projects$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  acknowledge(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  acknowledge(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Empty>;
   acknowledge(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   acknowledge(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -533,14 +534,14 @@ export class Resource$Projects$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Subscription>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Subscription>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Subscription>,
       callback?: BodyResponseCallback<Schema$Subscription>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Subscription>,
       callback?: BodyResponseCallback<Schema$Subscription>):
       void|AxiosPromise<Schema$Subscription> {
@@ -590,12 +591,12 @@ export class Resource$Projects$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -641,11 +642,11 @@ export class Resource$Projects$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Subscription>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Subscription>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Subscription>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Subscription>,
       callback?: BodyResponseCallback<Schema$Subscription>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Subscription>,
       callback?: BodyResponseCallback<Schema$Subscription>):
       void|AxiosPromise<Schema$Subscription> {
@@ -693,13 +694,13 @@ export class Resource$Projects$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -747,15 +748,15 @@ export class Resource$Projects$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListSubscriptionsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListSubscriptionsResponse>,
       callback?: BodyResponseCallback<Schema$ListSubscriptionsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListSubscriptionsResponse>,
       callback?: BodyResponseCallback<Schema$ListSubscriptionsResponse>):
@@ -808,13 +809,13 @@ export class Resource$Projects$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  modifyAckDeadline(params: any, options?: MethodOptions):
+  modifyAckDeadline(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Empty>;
   modifyAckDeadline(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   modifyAckDeadline(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -865,13 +866,13 @@ export class Resource$Projects$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  modifyPushConfig(params: any, options?: MethodOptions):
+  modifyPushConfig(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Empty>;
   modifyPushConfig(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   modifyPushConfig(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -921,13 +922,14 @@ export class Resource$Projects$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  pull(params: any, options?: MethodOptions): AxiosPromise<Schema$PullResponse>;
+  pull(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$PullResponse>;
   pull(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PullResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PullResponse>,
       callback?: BodyResponseCallback<Schema$PullResponse>): void;
   pull(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PullResponse>,
       callback?: BodyResponseCallback<Schema$PullResponse>):
       void|AxiosPromise<Schema$PullResponse> {
@@ -976,13 +978,13 @@ export class Resource$Projects$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -1033,15 +1035,15 @@ export class Resource$Projects$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestIamPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>):
@@ -1104,12 +1106,12 @@ export class Resource$Projects$Topics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Topic>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Topic>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Topic>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Topic>,
       callback?: BodyResponseCallback<Schema$Topic>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Topic>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Topic>,
       callback?: BodyResponseCallback<Schema$Topic>):
       void|AxiosPromise<Schema$Topic> {
     if (typeof options === 'function') {
@@ -1158,12 +1160,12 @@ export class Resource$Projects$Topics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1208,10 +1210,10 @@ export class Resource$Projects$Topics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Topic>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Topic>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Topic>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Topic>,
       callback?: BodyResponseCallback<Schema$Topic>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Topic>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Topic>,
       callback?: BodyResponseCallback<Schema$Topic>):
       void|AxiosPromise<Schema$Topic> {
     if (typeof options === 'function') {
@@ -1257,13 +1259,13 @@ export class Resource$Projects$Topics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -1311,14 +1313,14 @@ export class Resource$Projects$Topics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListTopicsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListTopicsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListTopicsResponse>,
       callback?: BodyResponseCallback<Schema$ListTopicsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListTopicsResponse>,
       callback?: BodyResponseCallback<Schema$ListTopicsResponse>):
       void|AxiosPromise<Schema$ListTopicsResponse> {
@@ -1368,14 +1370,14 @@ export class Resource$Projects$Topics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  publish(params: any, options?: MethodOptions):
+  publish(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PublishResponse>;
   publish(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PublishResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PublishResponse>,
       callback?: BodyResponseCallback<Schema$PublishResponse>): void;
   publish(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PublishResponse>,
       callback?: BodyResponseCallback<Schema$PublishResponse>):
       void|AxiosPromise<Schema$PublishResponse> {
@@ -1424,13 +1426,13 @@ export class Resource$Projects$Topics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -1481,15 +1483,15 @@ export class Resource$Projects$Topics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestIamPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>):
@@ -1550,16 +1552,16 @@ export class Resource$Projects$Topics$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListTopicSubscriptionsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListTopicSubscriptionsResponse>,
       callback?: BodyResponseCallback<Schema$ListTopicSubscriptionsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListTopicSubscriptionsResponse>,
       callback?: BodyResponseCallback<Schema$ListTopicSubscriptionsResponse>):
diff --git a/src/apis/replicapool/v1beta1.ts b/src/apis/replicapool/v1beta1.ts
index 8b6d66b763..32662ecc6e 100644
--- a/src/apis/replicapool/v1beta1.ts
+++ b/src/apis/replicapool/v1beta1.ts
@@ -599,12 +599,12 @@ export class Resource$Pools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -653,10 +653,10 @@ export class Resource$Pools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Pool>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Pool>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Pool>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Pool>,
       callback?: BodyResponseCallback<Schema$Pool>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Pool>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Pool>,
       callback?: BodyResponseCallback<Schema$Pool>):
       void|AxiosPromise<Schema$Pool> {
     if (typeof options === 'function') {
@@ -706,12 +706,12 @@ export class Resource$Pools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Pool>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Pool>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Pool>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Pool>,
       callback?: BodyResponseCallback<Schema$Pool>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Pool>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Pool>,
       callback?: BodyResponseCallback<Schema$Pool>):
       void|AxiosPromise<Schema$Pool> {
     if (typeof options === 'function') {
@@ -762,14 +762,14 @@ export class Resource$Pools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PoolsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PoolsListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PoolsListResponse>,
       callback?: BodyResponseCallback<Schema$PoolsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PoolsListResponse>,
       callback?: BodyResponseCallback<Schema$PoolsListResponse>):
       void|AxiosPromise<Schema$PoolsListResponse> {
@@ -823,12 +823,12 @@ export class Resource$Pools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resize(params: any, options?: MethodOptions): AxiosPromise<Schema$Pool>;
+  resize(params?: any, options?: MethodOptions): AxiosPromise<Schema$Pool>;
   resize(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Pool>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Pool>,
       callback?: BodyResponseCallback<Schema$Pool>): void;
   resize(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Pool>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Pool>,
       callback?: BodyResponseCallback<Schema$Pool>):
       void|AxiosPromise<Schema$Pool> {
     if (typeof options === 'function') {
@@ -879,12 +879,12 @@ export class Resource$Pools {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  updatetemplate(params: any, options?: MethodOptions): AxiosPromise<void>;
+  updatetemplate(params?: any, options?: MethodOptions): AxiosPromise<void>;
   updatetemplate(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   updatetemplate(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -947,12 +947,14 @@ export class Resource$Replicas {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Replica>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Replica>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Replica>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Replica>,
       callback?: BodyResponseCallback<Schema$Replica>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Replica>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Replica>,
       callback?: BodyResponseCallback<Schema$Replica>):
       void|AxiosPromise<Schema$Replica> {
     if (typeof options === 'function') {
@@ -1003,10 +1005,12 @@ export class Resource$Replicas {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Replica>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Replica>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Replica>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Replica>,
       callback?: BodyResponseCallback<Schema$Replica>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Replica>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Replica>,
       callback?: BodyResponseCallback<Schema$Replica>):
       void|AxiosPromise<Schema$Replica> {
     if (typeof options === 'function') {
@@ -1058,14 +1062,14 @@ export class Resource$Replicas {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ReplicasListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ReplicasListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ReplicasListResponse>,
       callback?: BodyResponseCallback<Schema$ReplicasListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ReplicasListResponse>,
       callback?: BodyResponseCallback<Schema$ReplicasListResponse>):
       void|AxiosPromise<Schema$ReplicasListResponse> {
@@ -1117,12 +1121,14 @@ export class Resource$Replicas {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  restart(params: any, options?: MethodOptions): AxiosPromise<Schema$Replica>;
+  restart(params?: any, options?: MethodOptions): AxiosPromise<Schema$Replica>;
   restart(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Replica>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Replica>,
       callback?: BodyResponseCallback<Schema$Replica>): void;
   restart(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Replica>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Replica>,
       callback?: BodyResponseCallback<Schema$Replica>):
       void|AxiosPromise<Schema$Replica> {
     if (typeof options === 'function') {
diff --git a/src/apis/replicapool/v1beta2.ts b/src/apis/replicapool/v1beta2.ts
index 1678b50ac2..de6bf13b55 100644
--- a/src/apis/replicapool/v1beta2.ts
+++ b/src/apis/replicapool/v1beta2.ts
@@ -386,14 +386,14 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  abandonInstances(params: any, options?: MethodOptions):
+  abandonInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   abandonInstances(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   abandonInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -446,13 +446,13 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -507,14 +507,14 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  deleteInstances(params: any, options?: MethodOptions):
+  deleteInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   deleteInstances(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   deleteInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -565,12 +565,12 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$InstanceGroupManager>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InstanceGroupManager>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InstanceGroupManager>,
       callback?: BodyResponseCallback<Schema$InstanceGroupManager>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InstanceGroupManager>,
       callback?: BodyResponseCallback<Schema$InstanceGroupManager>):
       void|AxiosPromise<Schema$InstanceGroupManager> {
@@ -623,13 +623,13 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -683,15 +683,15 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstanceGroupManagerList>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InstanceGroupManagerList>,
       callback?: BodyResponseCallback<Schema$InstanceGroupManagerList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InstanceGroupManagerList>,
       callback?: BodyResponseCallback<Schema$InstanceGroupManagerList>):
@@ -745,14 +745,14 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  recreateInstances(params: any, options?: MethodOptions):
+  recreateInstances(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   recreateInstances(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   recreateInstances(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -807,13 +807,13 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resize(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  resize(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   resize(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   resize(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -866,14 +866,14 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setInstanceTemplate(params: any, options?: MethodOptions):
+  setInstanceTemplate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setInstanceTemplate(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setInstanceTemplate(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -926,14 +926,14 @@ export class Resource$Instancegroupmanagers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setTargetPools(params: any, options?: MethodOptions):
+  setTargetPools(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setTargetPools(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setTargetPools(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -996,11 +996,11 @@ export class Resource$Zoneoperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1054,14 +1054,14 @@ export class Resource$Zoneoperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OperationList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$OperationList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OperationList>,
       callback?: BodyResponseCallback<Schema$OperationList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$OperationList>,
       callback?: BodyResponseCallback<Schema$OperationList>):
       void|AxiosPromise<Schema$OperationList> {
diff --git a/src/apis/replicapoolupdater/v1beta1.ts b/src/apis/replicapoolupdater/v1beta1.ts
index f824d27b05..f9f4dd0db6 100644
--- a/src/apis/replicapoolupdater/v1beta1.ts
+++ b/src/apis/replicapoolupdater/v1beta1.ts
@@ -356,13 +356,13 @@ export class Resource$Rollingupdates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancel(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  cancel(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   cancel(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   cancel(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -413,11 +413,12 @@ export class Resource$Rollingupdates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$RollingUpdate>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RollingUpdate>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$RollingUpdate>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RollingUpdate>,
       callback?: BodyResponseCallback<Schema$RollingUpdate>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RollingUpdate>,
       callback?: BodyResponseCallback<Schema$RollingUpdate>):
       void|AxiosPromise<Schema$RollingUpdate> {
@@ -468,13 +469,13 @@ export class Resource$Rollingupdates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -528,14 +529,14 @@ export class Resource$Rollingupdates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RollingUpdateList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RollingUpdateList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RollingUpdateList>,
       callback?: BodyResponseCallback<Schema$RollingUpdateList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RollingUpdateList>,
       callback?: BodyResponseCallback<Schema$RollingUpdateList>):
       void|AxiosPromise<Schema$RollingUpdateList> {
@@ -589,14 +590,14 @@ export class Resource$Rollingupdates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listInstanceUpdates(params: any, options?: MethodOptions):
+  listInstanceUpdates(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstanceUpdateList>;
   listInstanceUpdates(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InstanceUpdateList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InstanceUpdateList>,
       callback?: BodyResponseCallback<Schema$InstanceUpdateList>): void;
   listInstanceUpdates(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InstanceUpdateList>,
       callback?: BodyResponseCallback<Schema$InstanceUpdateList>):
       void|AxiosPromise<Schema$InstanceUpdateList> {
@@ -648,13 +649,13 @@ export class Resource$Rollingupdates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  pause(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  pause(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   pause(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   pause(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -706,13 +707,13 @@ export class Resource$Rollingupdates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resume(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  resume(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   resume(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   resume(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -764,14 +765,14 @@ export class Resource$Rollingupdates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  rollback(params: any, options?: MethodOptions):
+  rollback(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   rollback(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   rollback(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -834,11 +835,11 @@ export class Resource$Zoneoperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -892,14 +893,14 @@ export class Resource$Zoneoperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OperationList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$OperationList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OperationList>,
       callback?: BodyResponseCallback<Schema$OperationList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$OperationList>,
       callback?: BodyResponseCallback<Schema$OperationList>):
       void|AxiosPromise<Schema$OperationList> {
diff --git a/src/apis/reseller/v1.ts b/src/apis/reseller/v1.ts
index 1add7d6bc2..07e9e6f315 100644
--- a/src/apis/reseller/v1.ts
+++ b/src/apis/reseller/v1.ts
@@ -455,10 +455,11 @@ export class Resource$Customers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Customer>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Customer>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Customer>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Customer>,
       callback?: BodyResponseCallback<Schema$Customer>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Customer>,
       callback?: BodyResponseCallback<Schema$Customer>):
       void|AxiosPromise<Schema$Customer> {
@@ -506,12 +507,13 @@ export class Resource$Customers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Customer>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Customer>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Customer>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Customer>,
       callback?: BodyResponseCallback<Schema$Customer>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Customer>,
       callback?: BodyResponseCallback<Schema$Customer>):
       void|AxiosPromise<Schema$Customer> {
@@ -560,12 +562,13 @@ export class Resource$Customers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Customer>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Customer>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Customer>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Customer>,
       callback?: BodyResponseCallback<Schema$Customer>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Customer>,
       callback?: BodyResponseCallback<Schema$Customer>):
       void|AxiosPromise<Schema$Customer> {
@@ -613,12 +616,13 @@ export class Resource$Customers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Customer>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Customer>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Customer>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Customer>,
       callback?: BodyResponseCallback<Schema$Customer>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Customer>,
       callback?: BodyResponseCallback<Schema$Customer>):
       void|AxiosPromise<Schema$Customer> {
@@ -676,17 +680,17 @@ export class Resource$Resellernotify {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getwatchdetails(params: any, options?: MethodOptions):
+  getwatchdetails(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ResellernotifyGetwatchdetailsResponse>;
   getwatchdetails(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ResellernotifyGetwatchdetailsResponse>,
       callback?:
           BodyResponseCallback<Schema$ResellernotifyGetwatchdetailsResponse>):
       void;
   getwatchdetails(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ResellernotifyGetwatchdetailsResponse>,
       callback?:
@@ -737,15 +741,15 @@ export class Resource$Resellernotify {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  register(params: any, options?: MethodOptions):
+  register(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ResellernotifyResource>;
   register(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ResellernotifyResource>,
       callback?: BodyResponseCallback<Schema$ResellernotifyResource>): void;
   register(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ResellernotifyResource>,
       callback?: BodyResponseCallback<Schema$ResellernotifyResource>):
@@ -793,15 +797,15 @@ export class Resource$Resellernotify {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  unregister(params: any, options?: MethodOptions):
+  unregister(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ResellernotifyResource>;
   unregister(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ResellernotifyResource>,
       callback?: BodyResponseCallback<Schema$ResellernotifyResource>): void;
   unregister(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ResellernotifyResource>,
       callback?: BodyResponseCallback<Schema$ResellernotifyResource>):
@@ -862,14 +866,14 @@ export class Resource$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  activate(params: any, options?: MethodOptions):
+  activate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Subscription>;
   activate(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Subscription>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Subscription>,
       callback?: BodyResponseCallback<Schema$Subscription>): void;
   activate(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Subscription>,
       callback?: BodyResponseCallback<Schema$Subscription>):
       void|AxiosPromise<Schema$Subscription> {
@@ -922,14 +926,14 @@ export class Resource$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  changePlan(params: any, options?: MethodOptions):
+  changePlan(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Subscription>;
   changePlan(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Subscription>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Subscription>,
       callback?: BodyResponseCallback<Schema$Subscription>): void;
   changePlan(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Subscription>,
       callback?: BodyResponseCallback<Schema$Subscription>):
       void|AxiosPromise<Schema$Subscription> {
@@ -981,14 +985,14 @@ export class Resource$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  changeRenewalSettings(params: any, options?: MethodOptions):
+  changeRenewalSettings(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Subscription>;
   changeRenewalSettings(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Subscription>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Subscription>,
       callback?: BodyResponseCallback<Schema$Subscription>): void;
   changeRenewalSettings(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Subscription>,
       callback?: BodyResponseCallback<Schema$Subscription>):
       void|AxiosPromise<Schema$Subscription> {
@@ -1039,14 +1043,14 @@ export class Resource$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  changeSeats(params: any, options?: MethodOptions):
+  changeSeats(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Subscription>;
   changeSeats(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Subscription>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Subscription>,
       callback?: BodyResponseCallback<Schema$Subscription>): void;
   changeSeats(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Subscription>,
       callback?: BodyResponseCallback<Schema$Subscription>):
       void|AxiosPromise<Schema$Subscription> {
@@ -1097,12 +1101,12 @@ export class Resource$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1150,11 +1154,11 @@ export class Resource$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Subscription>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Subscription>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Subscription>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Subscription>,
       callback?: BodyResponseCallback<Schema$Subscription>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Subscription>,
       callback?: BodyResponseCallback<Schema$Subscription>):
       void|AxiosPromise<Schema$Subscription> {
@@ -1205,14 +1209,14 @@ export class Resource$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Subscription>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Subscription>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Subscription>,
       callback?: BodyResponseCallback<Schema$Subscription>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Subscription>,
       callback?: BodyResponseCallback<Schema$Subscription>):
       void|AxiosPromise<Schema$Subscription> {
@@ -1266,14 +1270,14 @@ export class Resource$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Subscriptions>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Subscriptions>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Subscriptions>,
       callback?: BodyResponseCallback<Schema$Subscriptions>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Subscriptions>,
       callback?: BodyResponseCallback<Schema$Subscriptions>):
       void|AxiosPromise<Schema$Subscriptions> {
@@ -1322,14 +1326,14 @@ export class Resource$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  startPaidService(params: any, options?: MethodOptions):
+  startPaidService(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Subscription>;
   startPaidService(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Subscription>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Subscription>,
       callback?: BodyResponseCallback<Schema$Subscription>): void;
   startPaidService(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Subscription>,
       callback?: BodyResponseCallback<Schema$Subscription>):
       void|AxiosPromise<Schema$Subscription> {
@@ -1379,14 +1383,14 @@ export class Resource$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  suspend(params: any, options?: MethodOptions):
+  suspend(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Subscription>;
   suspend(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Subscription>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Subscription>,
       callback?: BodyResponseCallback<Schema$Subscription>): void;
   suspend(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Subscription>,
       callback?: BodyResponseCallback<Schema$Subscription>):
       void|AxiosPromise<Schema$Subscription> {
diff --git a/src/apis/resourceviews/v1beta1.ts b/src/apis/resourceviews/v1beta1.ts
index 23a5d983bb..ff3bc4fbbf 100644
--- a/src/apis/resourceviews/v1beta1.ts
+++ b/src/apis/resourceviews/v1beta1.ts
@@ -258,12 +258,12 @@ export class Resource$Regionviews {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  addresources(params: any, options?: MethodOptions): AxiosPromise<void>;
+  addresources(params?: any, options?: MethodOptions): AxiosPromise<void>;
   addresources(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   addresources(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -312,12 +312,12 @@ export class Resource$Regionviews {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -366,11 +366,11 @@ export class Resource$Regionviews {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$ResourceView>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ResourceView>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$ResourceView>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ResourceView>,
       callback?: BodyResponseCallback<Schema$ResourceView>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ResourceView>,
       callback?: BodyResponseCallback<Schema$ResourceView>):
       void|AxiosPromise<Schema$ResourceView> {
@@ -421,15 +421,15 @@ export class Resource$Regionviews {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RegionViewsInsertResponse>;
   insert(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$RegionViewsInsertResponse>,
       callback?: BodyResponseCallback<Schema$RegionViewsInsertResponse>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$RegionViewsInsertResponse>,
       callback?: BodyResponseCallback<Schema$RegionViewsInsertResponse>):
@@ -482,15 +482,15 @@ export class Resource$Regionviews {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RegionViewsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$RegionViewsListResponse>,
       callback?: BodyResponseCallback<Schema$RegionViewsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$RegionViewsListResponse>,
       callback?: BodyResponseCallback<Schema$RegionViewsListResponse>):
@@ -544,16 +544,16 @@ export class Resource$Regionviews {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listresources(params: any, options?: MethodOptions):
+  listresources(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RegionViewsListResourcesResponse>;
   listresources(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$RegionViewsListResourcesResponse>,
       callback?: BodyResponseCallback<Schema$RegionViewsListResourcesResponse>):
       void;
   listresources(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$RegionViewsListResourcesResponse>,
       callback?: BodyResponseCallback<Schema$RegionViewsListResourcesResponse>):
@@ -608,12 +608,12 @@ export class Resource$Regionviews {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  removeresources(params: any, options?: MethodOptions): AxiosPromise<void>;
+  removeresources(params?: any, options?: MethodOptions): AxiosPromise<void>;
   removeresources(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   removeresources(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -675,12 +675,12 @@ export class Resource$Zoneviews {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  addresources(params: any, options?: MethodOptions): AxiosPromise<void>;
+  addresources(params?: any, options?: MethodOptions): AxiosPromise<void>;
   addresources(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   addresources(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -729,12 +729,12 @@ export class Resource$Zoneviews {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -783,11 +783,11 @@ export class Resource$Zoneviews {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$ResourceView>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ResourceView>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$ResourceView>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ResourceView>,
       callback?: BodyResponseCallback<Schema$ResourceView>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ResourceView>,
       callback?: BodyResponseCallback<Schema$ResourceView>):
       void|AxiosPromise<Schema$ResourceView> {
@@ -838,15 +838,15 @@ export class Resource$Zoneviews {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ZoneViewsInsertResponse>;
   insert(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ZoneViewsInsertResponse>,
       callback?: BodyResponseCallback<Schema$ZoneViewsInsertResponse>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ZoneViewsInsertResponse>,
       callback?: BodyResponseCallback<Schema$ZoneViewsInsertResponse>):
@@ -899,14 +899,15 @@ export class Resource$Zoneviews {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ZoneViewsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ZoneViewsListResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ZoneViewsListResponse>,
       callback?: BodyResponseCallback<Schema$ZoneViewsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ZoneViewsListResponse>,
       callback?: BodyResponseCallback<Schema$ZoneViewsListResponse>):
@@ -960,16 +961,16 @@ export class Resource$Zoneviews {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listresources(params: any, options?: MethodOptions):
+  listresources(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ZoneViewsListResourcesResponse>;
   listresources(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ZoneViewsListResourcesResponse>,
       callback?: BodyResponseCallback<Schema$ZoneViewsListResourcesResponse>):
       void;
   listresources(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ZoneViewsListResourcesResponse>,
       callback?: BodyResponseCallback<Schema$ZoneViewsListResourcesResponse>):
@@ -1024,12 +1025,12 @@ export class Resource$Zoneviews {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  removeresources(params: any, options?: MethodOptions): AxiosPromise<void>;
+  removeresources(params?: any, options?: MethodOptions): AxiosPromise<void>;
   removeresources(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   removeresources(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
diff --git a/src/apis/resourceviews/v1beta2.ts b/src/apis/resourceviews/v1beta2.ts
index c1d245a7df..4e5f606cb8 100644
--- a/src/apis/resourceviews/v1beta2.ts
+++ b/src/apis/resourceviews/v1beta2.ts
@@ -402,11 +402,11 @@ export class Resource$Zoneoperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -460,14 +460,14 @@ export class Resource$Zoneoperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OperationList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$OperationList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$OperationList>,
       callback?: BodyResponseCallback<Schema$OperationList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$OperationList>,
       callback?: BodyResponseCallback<Schema$OperationList>):
       void|AxiosPromise<Schema$OperationList> {
@@ -531,14 +531,14 @@ export class Resource$Zoneviews {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  addResources(params: any, options?: MethodOptions):
+  addResources(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   addResources(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   addResources(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -589,13 +589,13 @@ export class Resource$Zoneviews {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -646,11 +646,11 @@ export class Resource$Zoneviews {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$ResourceView>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ResourceView>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$ResourceView>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ResourceView>,
       callback?: BodyResponseCallback<Schema$ResourceView>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ResourceView>,
       callback?: BodyResponseCallback<Schema$ResourceView>):
       void|AxiosPromise<Schema$ResourceView> {
@@ -702,16 +702,16 @@ export class Resource$Zoneviews {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getService(params: any, options?: MethodOptions):
+  getService(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ZoneViewsGetServiceResponse>;
   getService(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ZoneViewsGetServiceResponse>,
       callback?: BodyResponseCallback<Schema$ZoneViewsGetServiceResponse>):
       void;
   getService(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ZoneViewsGetServiceResponse>,
       callback?: BodyResponseCallback<Schema$ZoneViewsGetServiceResponse>):
@@ -764,13 +764,13 @@ export class Resource$Zoneviews {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -822,14 +822,14 @@ export class Resource$Zoneviews {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ZoneViewsList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ZoneViewsList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ZoneViewsList>,
       callback?: BodyResponseCallback<Schema$ZoneViewsList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ZoneViewsList>,
       callback?: BodyResponseCallback<Schema$ZoneViewsList>):
       void|AxiosPromise<Schema$ZoneViewsList> {
@@ -885,16 +885,16 @@ export class Resource$Zoneviews {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listResources(params: any, options?: MethodOptions):
+  listResources(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ZoneViewsListResourcesResponse>;
   listResources(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ZoneViewsListResourcesResponse>,
       callback?: BodyResponseCallback<Schema$ZoneViewsListResourcesResponse>):
       void;
   listResources(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ZoneViewsListResourcesResponse>,
       callback?: BodyResponseCallback<Schema$ZoneViewsListResourcesResponse>):
@@ -949,14 +949,14 @@ export class Resource$Zoneviews {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  removeResources(params: any, options?: MethodOptions):
+  removeResources(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   removeResources(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   removeResources(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1008,14 +1008,14 @@ export class Resource$Zoneviews {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setService(params: any, options?: MethodOptions):
+  setService(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   setService(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   setService(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
diff --git a/src/apis/runtimeconfig/v1.ts b/src/apis/runtimeconfig/v1.ts
index da6e8425d1..1a1f4d0135 100644
--- a/src/apis/runtimeconfig/v1.ts
+++ b/src/apis/runtimeconfig/v1.ts
@@ -216,12 +216,12 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancel(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  cancel(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   cancel(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   cancel(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -269,12 +269,12 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -330,15 +330,15 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListOperationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>):
diff --git a/src/apis/runtimeconfig/v1beta1.ts b/src/apis/runtimeconfig/v1beta1.ts
index fa7488c11c..17c90e7c34 100644
--- a/src/apis/runtimeconfig/v1beta1.ts
+++ b/src/apis/runtimeconfig/v1beta1.ts
@@ -542,14 +542,14 @@ export class Resource$Projects$Configs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RuntimeConfig>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RuntimeConfig>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RuntimeConfig>,
       callback?: BodyResponseCallback<Schema$RuntimeConfig>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RuntimeConfig>,
       callback?: BodyResponseCallback<Schema$RuntimeConfig>):
       void|AxiosPromise<Schema$RuntimeConfig> {
@@ -596,12 +596,12 @@ export class Resource$Projects$Configs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -646,11 +646,12 @@ export class Resource$Projects$Configs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$RuntimeConfig>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RuntimeConfig>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$RuntimeConfig>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RuntimeConfig>,
       callback?: BodyResponseCallback<Schema$RuntimeConfig>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RuntimeConfig>,
       callback?: BodyResponseCallback<Schema$RuntimeConfig>):
       void|AxiosPromise<Schema$RuntimeConfig> {
@@ -697,13 +698,13 @@ export class Resource$Projects$Configs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -751,14 +752,14 @@ export class Resource$Projects$Configs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListConfigsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListConfigsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListConfigsResponse>,
       callback?: BodyResponseCallback<Schema$ListConfigsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListConfigsResponse>,
       callback?: BodyResponseCallback<Schema$ListConfigsResponse>):
       void|AxiosPromise<Schema$ListConfigsResponse> {
@@ -807,13 +808,13 @@ export class Resource$Projects$Configs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -864,15 +865,15 @@ export class Resource$Projects$Configs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestIamPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>):
@@ -922,14 +923,14 @@ export class Resource$Projects$Configs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RuntimeConfig>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RuntimeConfig>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RuntimeConfig>,
       callback?: BodyResponseCallback<Schema$RuntimeConfig>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RuntimeConfig>,
       callback?: BodyResponseCallback<Schema$RuntimeConfig>):
       void|AxiosPromise<Schema$RuntimeConfig> {
@@ -988,11 +989,11 @@ export class Resource$Projects$Configs$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1043,15 +1044,15 @@ export class Resource$Projects$Configs$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestIamPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>):
@@ -1118,12 +1119,13 @@ export class Resource$Projects$Configs$Variables {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Variable>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Variable>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Variable>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Variable>,
       callback?: BodyResponseCallback<Schema$Variable>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Variable>,
       callback?: BodyResponseCallback<Schema$Variable>):
       void|AxiosPromise<Schema$Variable> {
@@ -1174,12 +1176,12 @@ export class Resource$Projects$Configs$Variables {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1224,10 +1226,11 @@ export class Resource$Projects$Configs$Variables {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Variable>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Variable>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Variable>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Variable>,
       callback?: BodyResponseCallback<Schema$Variable>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Variable>,
       callback?: BodyResponseCallback<Schema$Variable>):
       void|AxiosPromise<Schema$Variable> {
@@ -1280,14 +1283,15 @@ export class Resource$Projects$Configs$Variables {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListVariablesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListVariablesResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ListVariablesResponse>,
       callback?: BodyResponseCallback<Schema$ListVariablesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListVariablesResponse>,
       callback?: BodyResponseCallback<Schema$ListVariablesResponse>):
@@ -1340,15 +1344,15 @@ export class Resource$Projects$Configs$Variables {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestIamPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>):
@@ -1397,12 +1401,13 @@ export class Resource$Projects$Configs$Variables {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Variable>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Variable>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Variable>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Variable>,
       callback?: BodyResponseCallback<Schema$Variable>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Variable>,
       callback?: BodyResponseCallback<Schema$Variable>):
       void|AxiosPromise<Schema$Variable> {
@@ -1458,12 +1463,13 @@ export class Resource$Projects$Configs$Variables {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  watch(params: any, options?: MethodOptions): AxiosPromise<Schema$Variable>;
+  watch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Variable>;
   watch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Variable>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Variable>,
       callback?: BodyResponseCallback<Schema$Variable>): void;
   watch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Variable>,
       callback?: BodyResponseCallback<Schema$Variable>):
       void|AxiosPromise<Schema$Variable> {
@@ -1528,13 +1534,13 @@ export class Resource$Projects$Configs$Waiters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1581,12 +1587,12 @@ export class Resource$Projects$Configs$Waiters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1631,10 +1637,10 @@ export class Resource$Projects$Configs$Waiters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Waiter>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Waiter>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Waiter>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Waiter>,
       callback?: BodyResponseCallback<Schema$Waiter>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Waiter>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Waiter>,
       callback?: BodyResponseCallback<Schema$Waiter>):
       void|AxiosPromise<Schema$Waiter> {
     if (typeof options === 'function') {
@@ -1681,14 +1687,14 @@ export class Resource$Projects$Configs$Waiters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListWaitersResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListWaitersResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListWaitersResponse>,
       callback?: BodyResponseCallback<Schema$ListWaitersResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListWaitersResponse>,
       callback?: BodyResponseCallback<Schema$ListWaitersResponse>):
       void|AxiosPromise<Schema$ListWaitersResponse> {
@@ -1740,15 +1746,15 @@ export class Resource$Projects$Configs$Waiters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestIamPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>):
diff --git a/src/apis/safebrowsing/v4.ts b/src/apis/safebrowsing/v4.ts
index 03f9dffa28..13efb53886 100644
--- a/src/apis/safebrowsing/v4.ts
+++ b/src/apis/safebrowsing/v4.ts
@@ -593,13 +593,13 @@ export class Resource$Encodedfullhashes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$FindFullHashesResponse>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$FindFullHashesResponse>,
       callback?: BodyResponseCallback<Schema$FindFullHashesResponse>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$FindFullHashesResponse>,
       callback?: BodyResponseCallback<Schema$FindFullHashesResponse>):
@@ -660,14 +660,14 @@ export class Resource$Encodedupdates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions):
+  get(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FetchThreatListUpdatesResponse>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$FetchThreatListUpdatesResponse>,
       callback?: BodyResponseCallback<Schema$FetchThreatListUpdatesResponse>):
       void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$FetchThreatListUpdatesResponse>,
       callback?: BodyResponseCallback<Schema$FetchThreatListUpdatesResponse>):
@@ -729,15 +729,15 @@ export class Resource$Fullhashes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  find(params: any, options?: MethodOptions):
+  find(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FindFullHashesResponse>;
   find(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$FindFullHashesResponse>,
       callback?: BodyResponseCallback<Schema$FindFullHashesResponse>): void;
   find(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$FindFullHashesResponse>,
       callback?: BodyResponseCallback<Schema$FindFullHashesResponse>):
@@ -798,12 +798,12 @@ export class Resource$Threathits {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -859,15 +859,15 @@ export class Resource$Threatlists {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListThreatListsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListThreatListsResponse>,
       callback?: BodyResponseCallback<Schema$ListThreatListsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListThreatListsResponse>,
       callback?: BodyResponseCallback<Schema$ListThreatListsResponse>):
@@ -927,16 +927,16 @@ export class Resource$Threatlistupdates {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  fetch(params: any, options?: MethodOptions):
+  fetch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FetchThreatListUpdatesResponse>;
   fetch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$FetchThreatListUpdatesResponse>,
       callback?: BodyResponseCallback<Schema$FetchThreatListUpdatesResponse>):
       void;
   fetch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$FetchThreatListUpdatesResponse>,
       callback?: BodyResponseCallback<Schema$FetchThreatListUpdatesResponse>):
@@ -998,15 +998,15 @@ export class Resource$Threatmatches {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  find(params: any, options?: MethodOptions):
+  find(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FindThreatMatchesResponse>;
   find(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$FindThreatMatchesResponse>,
       callback?: BodyResponseCallback<Schema$FindThreatMatchesResponse>): void;
   find(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$FindThreatMatchesResponse>,
       callback?: BodyResponseCallback<Schema$FindThreatMatchesResponse>):
diff --git a/src/apis/script/v1.ts b/src/apis/script/v1.ts
index b03b3bbbfe..a3aa73481f 100644
--- a/src/apis/script/v1.ts
+++ b/src/apis/script/v1.ts
@@ -746,15 +746,15 @@ export class Resource$Processes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListUserProcessesResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListUserProcessesResponse>,
       callback?: BodyResponseCallback<Schema$ListUserProcessesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListUserProcessesResponse>,
       callback?: BodyResponseCallback<Schema$ListUserProcessesResponse>):
@@ -811,16 +811,16 @@ export class Resource$Processes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  listScriptProcesses(params: any, options?: MethodOptions):
+  listScriptProcesses(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListScriptProcessesResponse>;
   listScriptProcesses(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListScriptProcessesResponse>,
       callback?: BodyResponseCallback<Schema$ListScriptProcessesResponse>):
       void;
   listScriptProcesses(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListScriptProcessesResponse>,
       callback?: BodyResponseCallback<Schema$ListScriptProcessesResponse>):
@@ -886,12 +886,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Project>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Project>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Project>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Project>,
       callback?: BodyResponseCallback<Schema$Project>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Project>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Project>,
       callback?: BodyResponseCallback<Schema$Project>):
       void|AxiosPromise<Schema$Project> {
     if (typeof options === 'function') {
@@ -936,10 +938,12 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Project>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Project>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Project>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Project>,
       callback?: BodyResponseCallback<Schema$Project>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Project>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Project>,
       callback?: BodyResponseCallback<Schema$Project>):
       void|AxiosPromise<Schema$Project> {
     if (typeof options === 'function') {
@@ -987,13 +991,15 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getContent(params: any, options?: MethodOptions):
+  getContent(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Content>;
   getContent(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Content>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Content>,
       callback?: BodyResponseCallback<Schema$Content>): void;
   getContent(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Content>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Content>,
       callback?: BodyResponseCallback<Schema$Content>):
       void|AxiosPromise<Schema$Content> {
     if (typeof options === 'function') {
@@ -1042,13 +1048,15 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getMetrics(params: any, options?: MethodOptions):
+  getMetrics(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Metrics>;
   getMetrics(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Metrics>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Metrics>,
       callback?: BodyResponseCallback<Schema$Metrics>): void;
   getMetrics(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Metrics>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Metrics>,
       callback?: BodyResponseCallback<Schema$Metrics>):
       void|AxiosPromise<Schema$Metrics> {
     if (typeof options === 'function') {
@@ -1099,13 +1107,15 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  updateContent(params: any, options?: MethodOptions):
+  updateContent(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Content>;
   updateContent(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Content>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Content>,
       callback?: BodyResponseCallback<Schema$Content>): void;
   updateContent(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Content>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Content>,
       callback?: BodyResponseCallback<Schema$Content>):
       void|AxiosPromise<Schema$Content> {
     if (typeof options === 'function') {
@@ -1163,13 +1173,14 @@ export class Resource$Projects$Deployments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Deployment>;
+  create(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Deployment>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Deployment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Deployment>,
       callback?: BodyResponseCallback<Schema$Deployment>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Deployment>,
       callback?: BodyResponseCallback<Schema$Deployment>):
       void|AxiosPromise<Schema$Deployment> {
@@ -1217,12 +1228,12 @@ export class Resource$Projects$Deployments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1270,11 +1281,11 @@ export class Resource$Projects$Deployments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Deployment>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Deployment>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Deployment>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Deployment>,
       callback?: BodyResponseCallback<Schema$Deployment>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Deployment>,
       callback?: BodyResponseCallback<Schema$Deployment>):
       void|AxiosPromise<Schema$Deployment> {
@@ -1324,15 +1335,15 @@ export class Resource$Projects$Deployments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListDeploymentsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListDeploymentsResponse>,
       callback?: BodyResponseCallback<Schema$ListDeploymentsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListDeploymentsResponse>,
       callback?: BodyResponseCallback<Schema$ListDeploymentsResponse>):
@@ -1382,13 +1393,14 @@ export class Resource$Projects$Deployments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Deployment>;
+  update(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Deployment>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Deployment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Deployment>,
       callback?: BodyResponseCallback<Schema$Deployment>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Deployment>,
       callback?: BodyResponseCallback<Schema$Deployment>):
       void|AxiosPromise<Schema$Deployment> {
@@ -1450,12 +1462,14 @@ export class Resource$Projects$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Version>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Version>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Version>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Version>,
       callback?: BodyResponseCallback<Schema$Version>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Version>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Version>,
       callback?: BodyResponseCallback<Schema$Version>):
       void|AxiosPromise<Schema$Version> {
     if (typeof options === 'function') {
@@ -1502,10 +1516,12 @@ export class Resource$Projects$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Version>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Version>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Version>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Version>,
       callback?: BodyResponseCallback<Schema$Version>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Version>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Version>,
       callback?: BodyResponseCallback<Schema$Version>):
       void|AxiosPromise<Schema$Version> {
     if (typeof options === 'function') {
@@ -1553,14 +1569,14 @@ export class Resource$Projects$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListVersionsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListVersionsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListVersionsResponse>,
       callback?: BodyResponseCallback<Schema$ListVersionsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListVersionsResponse>,
       callback?: BodyResponseCallback<Schema$ListVersionsResponse>):
       void|AxiosPromise<Schema$ListVersionsResponse> {
@@ -1628,11 +1644,11 @@ export class Resource$Scripts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  run(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  run(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  run(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  run(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  run(params: any,
+  run(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
diff --git a/src/apis/searchconsole/v1.ts b/src/apis/searchconsole/v1.ts
index 1bc4c61d1b..58475282be 100644
--- a/src/apis/searchconsole/v1.ts
+++ b/src/apis/searchconsole/v1.ts
@@ -195,14 +195,14 @@ export class Resource$Urltestingtools$Mobilefriendlytest {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  run(params: any, options?: MethodOptions):
+  run(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RunMobileFriendlyTestResponse>;
-  run(params: any,
-      options: MethodOptions|
+  run(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$RunMobileFriendlyTestResponse>,
       callback?: BodyResponseCallback<Schema$RunMobileFriendlyTestResponse>):
       void;
-  run(params: any,
+  run(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$RunMobileFriendlyTestResponse>,
       callback?: BodyResponseCallback<Schema$RunMobileFriendlyTestResponse>):
diff --git a/src/apis/serviceconsumermanagement/v1.ts b/src/apis/serviceconsumermanagement/v1.ts
index ab7c405a12..34304961dc 100644
--- a/src/apis/serviceconsumermanagement/v1.ts
+++ b/src/apis/serviceconsumermanagement/v1.ts
@@ -2278,12 +2278,12 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancel(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  cancel(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   cancel(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   cancel(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2332,12 +2332,12 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2385,11 +2385,11 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2447,15 +2447,15 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListOperationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>):
@@ -2520,15 +2520,15 @@ export class Resource$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  search(params: any, options?: MethodOptions):
+  search(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SearchTenancyUnitsResponse>;
   search(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SearchTenancyUnitsResponse>,
       callback?: BodyResponseCallback<Schema$SearchTenancyUnitsResponse>): void;
   search(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SearchTenancyUnitsResponse>,
       callback?: BodyResponseCallback<Schema$SearchTenancyUnitsResponse>):
@@ -2593,14 +2593,14 @@ export class Resource$Services$Tenancyunits {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  addProject(params: any, options?: MethodOptions):
+  addProject(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   addProject(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   addProject(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2649,14 +2649,14 @@ export class Resource$Services$Tenancyunits {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TenancyUnit>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TenancyUnit>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TenancyUnit>,
       callback?: BodyResponseCallback<Schema$TenancyUnit>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TenancyUnit>,
       callback?: BodyResponseCallback<Schema$TenancyUnit>):
       void|AxiosPromise<Schema$TenancyUnit> {
@@ -2705,13 +2705,13 @@ export class Resource$Services$Tenancyunits {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2764,15 +2764,15 @@ export class Resource$Services$Tenancyunits {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListTenancyUnitsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListTenancyUnitsResponse>,
       callback?: BodyResponseCallback<Schema$ListTenancyUnitsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListTenancyUnitsResponse>,
       callback?: BodyResponseCallback<Schema$ListTenancyUnitsResponse>):
@@ -2825,14 +2825,14 @@ export class Resource$Services$Tenancyunits {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  removeProject(params: any, options?: MethodOptions):
+  removeProject(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   removeProject(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   removeProject(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
diff --git a/src/apis/servicecontrol/v1.ts b/src/apis/servicecontrol/v1.ts
index 5c9bacd98e..5b1c1528ce 100644
--- a/src/apis/servicecontrol/v1.ts
+++ b/src/apis/servicecontrol/v1.ts
@@ -1145,14 +1145,15 @@ export class Resource$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  allocateQuota(params: any, options?: MethodOptions):
+  allocateQuota(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AllocateQuotaResponse>;
   allocateQuota(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AllocateQuotaResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$AllocateQuotaResponse>,
       callback?: BodyResponseCallback<Schema$AllocateQuotaResponse>): void;
   allocateQuota(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$AllocateQuotaResponse>,
       callback?: BodyResponseCallback<Schema$AllocateQuotaResponse>):
@@ -1211,14 +1212,14 @@ export class Resource$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  check(params: any, options?: MethodOptions):
+  check(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CheckResponse>;
   check(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CheckResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CheckResponse>,
       callback?: BodyResponseCallback<Schema$CheckResponse>): void;
   check(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CheckResponse>,
       callback?: BodyResponseCallback<Schema$CheckResponse>):
       void|AxiosPromise<Schema$CheckResponse> {
@@ -1269,15 +1270,15 @@ export class Resource$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  endReconciliation(params: any, options?: MethodOptions):
+  endReconciliation(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$EndReconciliationResponse>;
   endReconciliation(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$EndReconciliationResponse>,
       callback?: BodyResponseCallback<Schema$EndReconciliationResponse>): void;
   endReconciliation(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$EndReconciliationResponse>,
       callback?: BodyResponseCallback<Schema$EndReconciliationResponse>):
@@ -1332,14 +1333,14 @@ export class Resource$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  releaseQuota(params: any, options?: MethodOptions):
+  releaseQuota(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ReleaseQuotaResponse>;
   releaseQuota(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ReleaseQuotaResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ReleaseQuotaResponse>,
       callback?: BodyResponseCallback<Schema$ReleaseQuotaResponse>): void;
   releaseQuota(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ReleaseQuotaResponse>,
       callback?: BodyResponseCallback<Schema$ReleaseQuotaResponse>):
       void|AxiosPromise<Schema$ReleaseQuotaResponse> {
@@ -1396,14 +1397,14 @@ export class Resource$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  report(params: any, options?: MethodOptions):
+  report(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ReportResponse>;
   report(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ReportResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ReportResponse>,
       callback?: BodyResponseCallback<Schema$ReportResponse>): void;
   report(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ReportResponse>,
       callback?: BodyResponseCallback<Schema$ReportResponse>):
       void|AxiosPromise<Schema$ReportResponse> {
@@ -1470,16 +1471,16 @@ export class Resource$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  startReconciliation(params: any, options?: MethodOptions):
+  startReconciliation(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$StartReconciliationResponse>;
   startReconciliation(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$StartReconciliationResponse>,
       callback?: BodyResponseCallback<Schema$StartReconciliationResponse>):
       void;
   startReconciliation(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$StartReconciliationResponse>,
       callback?: BodyResponseCallback<Schema$StartReconciliationResponse>):
diff --git a/src/apis/servicemanagement/v1.ts b/src/apis/servicemanagement/v1.ts
index 003f53b03f..299bec5af9 100644
--- a/src/apis/servicemanagement/v1.ts
+++ b/src/apis/servicemanagement/v1.ts
@@ -2549,11 +2549,11 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2567,7 +2567,7 @@ export class Resource$Operations {
     }
     options = options || {};
     const rootUrl =
-        options.rootUrl || 'https://content-servicemanagement.googleapis.com/';
+        options.rootUrl || 'https://servicemanagement.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -2604,15 +2604,15 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListOperationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>):
@@ -2627,7 +2627,7 @@ export class Resource$Operations {
     }
     options = options || {};
     const rootUrl =
-        options.rootUrl || 'https://content-servicemanagement.googleapis.com/';
+        options.rootUrl || 'https://servicemanagement.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -2679,13 +2679,13 @@ export class Resource$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2699,7 +2699,7 @@ export class Resource$Services {
     }
     options = options || {};
     const rootUrl =
-        options.rootUrl || 'https://content-servicemanagement.googleapis.com/';
+        options.rootUrl || 'https://servicemanagement.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -2735,13 +2735,13 @@ export class Resource$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2755,7 +2755,7 @@ export class Resource$Services {
     }
     options = options || {};
     const rootUrl =
-        options.rootUrl || 'https://content-servicemanagement.googleapis.com/';
+        options.rootUrl || 'https://servicemanagement.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -2792,13 +2792,14 @@ export class Resource$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  disable(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  disable(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Operation>;
   disable(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   disable(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2812,7 +2813,7 @@ export class Resource$Services {
     }
     options = options || {};
     const rootUrl =
-        options.rootUrl || 'https://content-servicemanagement.googleapis.com/';
+        options.rootUrl || 'https://servicemanagement.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -2849,13 +2850,13 @@ export class Resource$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  enable(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  enable(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   enable(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   enable(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2869,7 +2870,7 @@ export class Resource$Services {
     }
     options = options || {};
     const rootUrl =
-        options.rootUrl || 'https://content-servicemanagement.googleapis.com/';
+        options.rootUrl || 'https://servicemanagement.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -2912,16 +2913,16 @@ export class Resource$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  generateConfigReport(params: any, options?: MethodOptions):
+  generateConfigReport(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GenerateConfigReportResponse>;
   generateConfigReport(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GenerateConfigReportResponse>,
       callback?: BodyResponseCallback<Schema$GenerateConfigReportResponse>):
       void;
   generateConfigReport(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GenerateConfigReportResponse>,
       callback?: BodyResponseCallback<Schema$GenerateConfigReportResponse>):
@@ -2936,7 +2937,7 @@ export class Resource$Services {
     }
     options = options || {};
     const rootUrl =
-        options.rootUrl || 'https://content-servicemanagement.googleapis.com/';
+        options.rootUrl || 'https://servicemanagement.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -2972,12 +2973,12 @@ export class Resource$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$ManagedService>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ManagedService>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ManagedService>,
       callback?: BodyResponseCallback<Schema$ManagedService>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ManagedService>,
       callback?: BodyResponseCallback<Schema$ManagedService>):
       void|AxiosPromise<Schema$ManagedService> {
@@ -2991,7 +2992,7 @@ export class Resource$Services {
     }
     options = options || {};
     const rootUrl =
-        options.rootUrl || 'https://content-servicemanagement.googleapis.com/';
+        options.rootUrl || 'https://servicemanagement.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -3027,12 +3028,15 @@ export class Resource$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getConfig(params: any, options?: MethodOptions): AxiosPromise<Schema$Service>;
+  getConfig(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Service>;
   getConfig(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Service>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Service>,
       callback?: BodyResponseCallback<Schema$Service>): void;
   getConfig(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Service>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Service>,
       callback?: BodyResponseCallback<Schema$Service>):
       void|AxiosPromise<Schema$Service> {
     if (typeof options === 'function') {
@@ -3045,7 +3049,7 @@ export class Resource$Services {
     }
     options = options || {};
     const rootUrl =
-        options.rootUrl || 'https://content-servicemanagement.googleapis.com/';
+        options.rootUrl || 'https://servicemanagement.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -3081,13 +3085,13 @@ export class Resource$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -3100,7 +3104,7 @@ export class Resource$Services {
     }
     options = options || {};
     const rootUrl =
-        options.rootUrl || 'https://content-servicemanagement.googleapis.com/';
+        options.rootUrl || 'https://servicemanagement.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -3141,14 +3145,14 @@ export class Resource$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListServicesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListServicesResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListServicesResponse>,
       callback?: BodyResponseCallback<Schema$ListServicesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListServicesResponse>,
       callback?: BodyResponseCallback<Schema$ListServicesResponse>):
       void|AxiosPromise<Schema$ListServicesResponse> {
@@ -3162,7 +3166,7 @@ export class Resource$Services {
     }
     options = options || {};
     const rootUrl =
-        options.rootUrl || 'https://content-servicemanagement.googleapis.com/';
+        options.rootUrl || 'https://servicemanagement.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -3197,13 +3201,13 @@ export class Resource$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -3216,7 +3220,7 @@ export class Resource$Services {
     }
     options = options || {};
     const rootUrl =
-        options.rootUrl || 'https://content-servicemanagement.googleapis.com/';
+        options.rootUrl || 'https://servicemanagement.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -3255,15 +3259,15 @@ export class Resource$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestIamPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>):
@@ -3278,7 +3282,7 @@ export class Resource$Services {
     }
     options = options || {};
     const rootUrl =
-        options.rootUrl || 'https://content-servicemanagement.googleapis.com/';
+        options.rootUrl || 'https://servicemanagement.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -3315,14 +3319,14 @@ export class Resource$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  undelete(params: any, options?: MethodOptions):
+  undelete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   undelete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   undelete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3336,7 +3340,7 @@ export class Resource$Services {
     }
     options = options || {};
     const rootUrl =
-        options.rootUrl || 'https://content-servicemanagement.googleapis.com/';
+        options.rootUrl || 'https://servicemanagement.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -3386,12 +3390,14 @@ export class Resource$Services$Configs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Service>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Service>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Service>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Service>,
       callback?: BodyResponseCallback<Schema$Service>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Service>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Service>,
       callback?: BodyResponseCallback<Schema$Service>):
       void|AxiosPromise<Schema$Service> {
     if (typeof options === 'function') {
@@ -3404,7 +3410,7 @@ export class Resource$Services$Configs {
     }
     options = options || {};
     const rootUrl =
-        options.rootUrl || 'https://content-servicemanagement.googleapis.com/';
+        options.rootUrl || 'https://servicemanagement.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -3440,10 +3446,12 @@ export class Resource$Services$Configs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Service>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Service>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Service>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Service>,
       callback?: BodyResponseCallback<Schema$Service>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Service>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Service>,
       callback?: BodyResponseCallback<Schema$Service>):
       void|AxiosPromise<Schema$Service> {
     if (typeof options === 'function') {
@@ -3456,7 +3464,7 @@ export class Resource$Services$Configs {
     }
     options = options || {};
     const rootUrl =
-        options.rootUrl || 'https://content-servicemanagement.googleapis.com/';
+        options.rootUrl || 'https://servicemanagement.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -3493,15 +3501,15 @@ export class Resource$Services$Configs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListServiceConfigsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListServiceConfigsResponse>,
       callback?: BodyResponseCallback<Schema$ListServiceConfigsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListServiceConfigsResponse>,
       callback?: BodyResponseCallback<Schema$ListServiceConfigsResponse>):
@@ -3516,7 +3524,7 @@ export class Resource$Services$Configs {
     }
     options = options || {};
     const rootUrl =
-        options.rootUrl || 'https://content-servicemanagement.googleapis.com/';
+        options.rootUrl || 'https://servicemanagement.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -3558,13 +3566,13 @@ export class Resource$Services$Configs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  submit(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  submit(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   submit(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   submit(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3578,7 +3586,7 @@ export class Resource$Services$Configs {
     }
     options = options || {};
     const rootUrl =
-        options.rootUrl || 'https://content-servicemanagement.googleapis.com/';
+        options.rootUrl || 'https://servicemanagement.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -3626,13 +3634,13 @@ export class Resource$Services$Consumers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -3645,7 +3653,7 @@ export class Resource$Services$Consumers {
     }
     options = options || {};
     const rootUrl =
-        options.rootUrl || 'https://content-servicemanagement.googleapis.com/';
+        options.rootUrl || 'https://servicemanagement.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -3681,13 +3689,13 @@ export class Resource$Services$Consumers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -3700,7 +3708,7 @@ export class Resource$Services$Consumers {
     }
     options = options || {};
     const rootUrl =
-        options.rootUrl || 'https://content-servicemanagement.googleapis.com/';
+        options.rootUrl || 'https://servicemanagement.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -3739,15 +3747,15 @@ export class Resource$Services$Consumers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestIamPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>):
@@ -3762,7 +3770,7 @@ export class Resource$Services$Consumers {
     }
     options = options || {};
     const rootUrl =
-        options.rootUrl || 'https://content-servicemanagement.googleapis.com/';
+        options.rootUrl || 'https://servicemanagement.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -3817,13 +3825,13 @@ export class Resource$Services$Rollouts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3837,7 +3845,7 @@ export class Resource$Services$Rollouts {
     }
     options = options || {};
     const rootUrl =
-        options.rootUrl || 'https://content-servicemanagement.googleapis.com/';
+        options.rootUrl || 'https://servicemanagement.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -3872,10 +3880,12 @@ export class Resource$Services$Rollouts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Rollout>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Rollout>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Rollout>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Rollout>,
       callback?: BodyResponseCallback<Schema$Rollout>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Rollout>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Rollout>,
       callback?: BodyResponseCallback<Schema$Rollout>):
       void|AxiosPromise<Schema$Rollout> {
     if (typeof options === 'function') {
@@ -3888,7 +3898,7 @@ export class Resource$Services$Rollouts {
     }
     options = options || {};
     const rootUrl =
-        options.rootUrl || 'https://content-servicemanagement.googleapis.com/';
+        options.rootUrl || 'https://servicemanagement.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -3926,16 +3936,16 @@ export class Resource$Services$Rollouts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListServiceRolloutsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListServiceRolloutsResponse>,
       callback?: BodyResponseCallback<Schema$ListServiceRolloutsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListServiceRolloutsResponse>,
       callback?: BodyResponseCallback<Schema$ListServiceRolloutsResponse>):
@@ -3950,7 +3960,7 @@ export class Resource$Services$Rollouts {
     }
     options = options || {};
     const rootUrl =
-        options.rootUrl || 'https://content-servicemanagement.googleapis.com/';
+        options.rootUrl || 'https://servicemanagement.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
diff --git a/src/apis/serviceusage/v1beta1.ts b/src/apis/serviceusage/v1beta1.ts
index eaaf2f51b6..055f177d85 100644
--- a/src/apis/serviceusage/v1beta1.ts
+++ b/src/apis/serviceusage/v1beta1.ts
@@ -2186,11 +2186,11 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2247,15 +2247,15 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListOperationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>):
@@ -2318,14 +2318,14 @@ export class Resource$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchEnable(params: any, options?: MethodOptions):
+  batchEnable(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   batchEnable(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   batchEnable(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2378,13 +2378,14 @@ export class Resource$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  disable(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  disable(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Operation>;
   disable(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   disable(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2433,13 +2434,13 @@ export class Resource$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  enable(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  enable(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   enable(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   enable(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2487,10 +2488,12 @@ export class Resource$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Service>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Service>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Service>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Service>,
       callback?: BodyResponseCallback<Schema$Service>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Service>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Service>,
       callback?: BodyResponseCallback<Schema$Service>):
       void|AxiosPromise<Schema$Service> {
     if (typeof options === 'function') {
@@ -2544,14 +2547,14 @@ export class Resource$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListServicesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListServicesResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListServicesResponse>,
       callback?: BodyResponseCallback<Schema$ListServicesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListServicesResponse>,
       callback?: BodyResponseCallback<Schema$ListServicesResponse>):
       void|AxiosPromise<Schema$ListServicesResponse> {
diff --git a/src/apis/serviceuser/v1.ts b/src/apis/serviceuser/v1.ts
index e01f87c1ec..5c36b9589a 100644
--- a/src/apis/serviceuser/v1.ts
+++ b/src/apis/serviceuser/v1.ts
@@ -2076,13 +2076,14 @@ export class Resource$Projects$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  disable(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  disable(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Operation>;
   disable(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   disable(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2095,8 +2096,7 @@ export class Resource$Projects$Services {
       params = {};
     }
     options = options || {};
-    const rootUrl =
-        options.rootUrl || 'https://content-serviceuser.googleapis.com/';
+    const rootUrl = options.rootUrl || 'https://serviceuser.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -2132,13 +2132,13 @@ export class Resource$Projects$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  enable(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  enable(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   enable(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   enable(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2151,8 +2151,7 @@ export class Resource$Projects$Services {
       params = {};
     }
     options = options || {};
-    const rootUrl =
-        options.rootUrl || 'https://content-serviceuser.googleapis.com/';
+    const rootUrl = options.rootUrl || 'https://serviceuser.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -2187,16 +2186,16 @@ export class Resource$Projects$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListEnabledServicesResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListEnabledServicesResponse>,
       callback?: BodyResponseCallback<Schema$ListEnabledServicesResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListEnabledServicesResponse>,
       callback?: BodyResponseCallback<Schema$ListEnabledServicesResponse>):
@@ -2210,8 +2209,7 @@ export class Resource$Projects$Services {
       params = {};
     }
     options = options || {};
-    const rootUrl =
-        options.rootUrl || 'https://content-serviceuser.googleapis.com/';
+    const rootUrl = options.rootUrl || 'https://serviceuser.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -2262,15 +2260,15 @@ export class Resource$Services {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  search(params: any, options?: MethodOptions):
+  search(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SearchServicesResponse>;
   search(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SearchServicesResponse>,
       callback?: BodyResponseCallback<Schema$SearchServicesResponse>): void;
   search(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SearchServicesResponse>,
       callback?: BodyResponseCallback<Schema$SearchServicesResponse>):
@@ -2284,8 +2282,7 @@ export class Resource$Services {
       params = {};
     }
     options = options || {};
-    const rootUrl =
-        options.rootUrl || 'https://content-serviceuser.googleapis.com/';
+    const rootUrl = options.rootUrl || 'https://serviceuser.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
diff --git a/src/apis/sheets/v4.ts b/src/apis/sheets/v4.ts
index 247c045d28..24f72e620d 100644
--- a/src/apis/sheets/v4.ts
+++ b/src/apis/sheets/v4.ts
@@ -4295,16 +4295,16 @@ export class Resource$Spreadsheets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchUpdate(params: any, options?: MethodOptions):
+  batchUpdate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BatchUpdateSpreadsheetResponse>;
   batchUpdate(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$BatchUpdateSpreadsheetResponse>,
       callback?: BodyResponseCallback<Schema$BatchUpdateSpreadsheetResponse>):
       void;
   batchUpdate(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$BatchUpdateSpreadsheetResponse>,
       callback?: BodyResponseCallback<Schema$BatchUpdateSpreadsheetResponse>):
@@ -4404,14 +4404,14 @@ export class Resource$Spreadsheets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Spreadsheet>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Spreadsheet>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Spreadsheet>,
       callback?: BodyResponseCallback<Schema$Spreadsheet>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Spreadsheet>,
       callback?: BodyResponseCallback<Schema$Spreadsheet>):
       void|AxiosPromise<Schema$Spreadsheet> {
@@ -4527,11 +4527,11 @@ export class Resource$Spreadsheets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Spreadsheet>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Spreadsheet>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Spreadsheet>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Spreadsheet>,
       callback?: BodyResponseCallback<Schema$Spreadsheet>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Spreadsheet>,
       callback?: BodyResponseCallback<Schema$Spreadsheet>):
       void|AxiosPromise<Schema$Spreadsheet> {
@@ -4651,14 +4651,14 @@ export class Resource$Spreadsheets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getByDataFilter(params: any, options?: MethodOptions):
+  getByDataFilter(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Spreadsheet>;
   getByDataFilter(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Spreadsheet>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Spreadsheet>,
       callback?: BodyResponseCallback<Schema$Spreadsheet>): void;
   getByDataFilter(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Spreadsheet>,
       callback?: BodyResponseCallback<Schema$Spreadsheet>):
       void|AxiosPromise<Schema$Spreadsheet> {
@@ -4768,12 +4768,12 @@ export class Resource$Spreadsheets$Developermetadata {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$DeveloperMetadata>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DeveloperMetadata>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DeveloperMetadata>,
       callback?: BodyResponseCallback<Schema$DeveloperMetadata>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DeveloperMetadata>,
       callback?: BodyResponseCallback<Schema$DeveloperMetadata>):
       void|AxiosPromise<Schema$DeveloperMetadata> {
@@ -4878,16 +4878,16 @@ export class Resource$Spreadsheets$Developermetadata {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  search(params: any, options?: MethodOptions):
+  search(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SearchDeveloperMetadataResponse>;
   search(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SearchDeveloperMetadataResponse>,
       callback?: BodyResponseCallback<Schema$SearchDeveloperMetadataResponse>):
       void;
   search(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SearchDeveloperMetadataResponse>,
       callback?: BodyResponseCallback<Schema$SearchDeveloperMetadataResponse>):
@@ -5012,14 +5012,14 @@ export class Resource$Spreadsheets$Sheets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  copyTo(params: any, options?: MethodOptions):
+  copyTo(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SheetProperties>;
   copyTo(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SheetProperties>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SheetProperties>,
       callback?: BodyResponseCallback<Schema$SheetProperties>): void;
   copyTo(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SheetProperties>,
       callback?: BodyResponseCallback<Schema$SheetProperties>):
       void|AxiosPromise<Schema$SheetProperties> {
@@ -5158,14 +5158,14 @@ export class Resource$Spreadsheets$Values {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  append(params: any, options?: MethodOptions):
+  append(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$AppendValuesResponse>;
   append(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AppendValuesResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AppendValuesResponse>,
       callback?: BodyResponseCallback<Schema$AppendValuesResponse>): void;
   append(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AppendValuesResponse>,
       callback?: BodyResponseCallback<Schema$AppendValuesResponse>):
       void|AxiosPromise<Schema$AppendValuesResponse> {
@@ -5273,15 +5273,15 @@ export class Resource$Spreadsheets$Values {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchClear(params: any, options?: MethodOptions):
+  batchClear(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BatchClearValuesResponse>;
   batchClear(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$BatchClearValuesResponse>,
       callback?: BodyResponseCallback<Schema$BatchClearValuesResponse>): void;
   batchClear(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$BatchClearValuesResponse>,
       callback?: BodyResponseCallback<Schema$BatchClearValuesResponse>):
@@ -5389,17 +5389,17 @@ export class Resource$Spreadsheets$Values {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchClearByDataFilter(params: any, options?: MethodOptions):
+  batchClearByDataFilter(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BatchClearValuesByDataFilterResponse>;
   batchClearByDataFilter(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$BatchClearValuesByDataFilterResponse>,
       callback?:
           BodyResponseCallback<Schema$BatchClearValuesByDataFilterResponse>):
       void;
   batchClearByDataFilter(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$BatchClearValuesByDataFilterResponse>,
       callback?:
@@ -5522,15 +5522,15 @@ export class Resource$Spreadsheets$Values {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchGet(params: any, options?: MethodOptions):
+  batchGet(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BatchGetValuesResponse>;
   batchGet(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$BatchGetValuesResponse>,
       callback?: BodyResponseCallback<Schema$BatchGetValuesResponse>): void;
   batchGet(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$BatchGetValuesResponse>,
       callback?: BodyResponseCallback<Schema$BatchGetValuesResponse>):
@@ -5652,17 +5652,17 @@ export class Resource$Spreadsheets$Values {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchGetByDataFilter(params: any, options?: MethodOptions):
+  batchGetByDataFilter(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BatchGetValuesByDataFilterResponse>;
   batchGetByDataFilter(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$BatchGetValuesByDataFilterResponse>,
       callback?:
           BodyResponseCallback<Schema$BatchGetValuesByDataFilterResponse>):
       void;
   batchGetByDataFilter(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$BatchGetValuesByDataFilterResponse>,
       callback?:
@@ -5777,15 +5777,15 @@ export class Resource$Spreadsheets$Values {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchUpdate(params: any, options?: MethodOptions):
+  batchUpdate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BatchUpdateValuesResponse>;
   batchUpdate(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$BatchUpdateValuesResponse>,
       callback?: BodyResponseCallback<Schema$BatchUpdateValuesResponse>): void;
   batchUpdate(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$BatchUpdateValuesResponse>,
       callback?: BodyResponseCallback<Schema$BatchUpdateValuesResponse>):
@@ -5897,17 +5897,17 @@ export class Resource$Spreadsheets$Values {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchUpdateByDataFilter(params: any, options?: MethodOptions):
+  batchUpdateByDataFilter(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BatchUpdateValuesByDataFilterResponse>;
   batchUpdateByDataFilter(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$BatchUpdateValuesByDataFilterResponse>,
       callback?:
           BodyResponseCallback<Schema$BatchUpdateValuesByDataFilterResponse>):
       void;
   batchUpdateByDataFilter(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$BatchUpdateValuesByDataFilterResponse>,
       callback?:
@@ -6020,14 +6020,14 @@ export class Resource$Spreadsheets$Values {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  clear(params: any, options?: MethodOptions):
+  clear(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ClearValuesResponse>;
   clear(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ClearValuesResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ClearValuesResponse>,
       callback?: BodyResponseCallback<Schema$ClearValuesResponse>): void;
   clear(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ClearValuesResponse>,
       callback?: BodyResponseCallback<Schema$ClearValuesResponse>):
       void|AxiosPromise<Schema$ClearValuesResponse> {
@@ -6145,11 +6145,11 @@ export class Resource$Spreadsheets$Values {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$ValueRange>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ValueRange>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$ValueRange>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ValueRange>,
       callback?: BodyResponseCallback<Schema$ValueRange>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ValueRange>,
       callback?: BodyResponseCallback<Schema$ValueRange>):
       void|AxiosPromise<Schema$ValueRange> {
@@ -6264,14 +6264,14 @@ export class Resource$Spreadsheets$Values {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$UpdateValuesResponse>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UpdateValuesResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UpdateValuesResponse>,
       callback?: BodyResponseCallback<Schema$UpdateValuesResponse>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UpdateValuesResponse>,
       callback?: BodyResponseCallback<Schema$UpdateValuesResponse>):
       void|AxiosPromise<Schema$UpdateValuesResponse> {
diff --git a/src/apis/siteVerification/v1.ts b/src/apis/siteVerification/v1.ts
index 17e7a1e5b4..c5d33559a7 100644
--- a/src/apis/siteVerification/v1.ts
+++ b/src/apis/siteVerification/v1.ts
@@ -137,12 +137,12 @@ export class Resource$Webresource {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -187,15 +187,15 @@ export class Resource$Webresource {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions):
+  get(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SiteVerificationWebResourceResource>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SiteVerificationWebResourceResource>,
       callback?:
           BodyResponseCallback<Schema$SiteVerificationWebResourceResource>):
       void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SiteVerificationWebResourceResource>,
       callback?:
@@ -246,16 +246,16 @@ export class Resource$Webresource {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getToken(params: any, options?: MethodOptions):
+  getToken(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SiteVerificationWebResourceGettokenResponse>;
   getToken(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SiteVerificationWebResourceGettokenResponse>,
       callback?: BodyResponseCallback<
           Schema$SiteVerificationWebResourceGettokenResponse>): void;
   getToken(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SiteVerificationWebResourceGettokenResponse>,
       callback?: BodyResponseCallback<
@@ -307,17 +307,17 @@ export class Resource$Webresource {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SiteVerificationWebResourceResource>;
   insert(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SiteVerificationWebResourceResource>,
       callback?:
           BodyResponseCallback<Schema$SiteVerificationWebResourceResource>):
       void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SiteVerificationWebResourceResource>,
       callback?:
@@ -367,17 +367,17 @@ export class Resource$Webresource {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SiteVerificationWebResourceListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SiteVerificationWebResourceListResponse>,
       callback?:
           BodyResponseCallback<Schema$SiteVerificationWebResourceListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SiteVerificationWebResourceListResponse>,
       callback?:
@@ -430,17 +430,17 @@ export class Resource$Webresource {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SiteVerificationWebResourceResource>;
   patch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SiteVerificationWebResourceResource>,
       callback?:
           BodyResponseCallback<Schema$SiteVerificationWebResourceResource>):
       void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SiteVerificationWebResourceResource>,
       callback?:
@@ -492,17 +492,17 @@ export class Resource$Webresource {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SiteVerificationWebResourceResource>;
   update(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SiteVerificationWebResourceResource>,
       callback?:
           BodyResponseCallback<Schema$SiteVerificationWebResourceResource>):
       void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SiteVerificationWebResourceResource>,
       callback?:
diff --git a/src/apis/slides/v1.ts b/src/apis/slides/v1.ts
index 94b40970c5..f58ee36848 100644
--- a/src/apis/slides/v1.ts
+++ b/src/apis/slides/v1.ts
@@ -3140,16 +3140,16 @@ export class Resource$Presentations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchUpdate(params: any, options?: MethodOptions):
+  batchUpdate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BatchUpdatePresentationResponse>;
   batchUpdate(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$BatchUpdatePresentationResponse>,
       callback?: BodyResponseCallback<Schema$BatchUpdatePresentationResponse>):
       void;
   batchUpdate(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$BatchUpdatePresentationResponse>,
       callback?: BodyResponseCallback<Schema$BatchUpdatePresentationResponse>):
@@ -3202,14 +3202,14 @@ export class Resource$Presentations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Presentation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Presentation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Presentation>,
       callback?: BodyResponseCallback<Schema$Presentation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Presentation>,
       callback?: BodyResponseCallback<Schema$Presentation>):
       void|AxiosPromise<Schema$Presentation> {
@@ -3255,11 +3255,11 @@ export class Resource$Presentations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Presentation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Presentation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Presentation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Presentation>,
       callback?: BodyResponseCallback<Schema$Presentation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Presentation>,
       callback?: BodyResponseCallback<Schema$Presentation>):
       void|AxiosPromise<Schema$Presentation> {
@@ -3318,10 +3318,10 @@ export class Resource$Presentations$Pages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Page>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Page>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Page>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Page>,
       callback?: BodyResponseCallback<Schema$Page>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Page>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Page>,
       callback?: BodyResponseCallback<Schema$Page>):
       void|AxiosPromise<Schema$Page> {
     if (typeof options === 'function') {
@@ -3373,14 +3373,14 @@ export class Resource$Presentations$Pages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getThumbnail(params: any, options?: MethodOptions):
+  getThumbnail(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Thumbnail>;
   getThumbnail(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Thumbnail>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Thumbnail>,
       callback?: BodyResponseCallback<Schema$Thumbnail>): void;
   getThumbnail(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Thumbnail>,
       callback?: BodyResponseCallback<Schema$Thumbnail>):
       void|AxiosPromise<Schema$Thumbnail> {
diff --git a/src/apis/sourcerepo/v1.ts b/src/apis/sourcerepo/v1.ts
index 0623ce23e4..0660dda784 100644
--- a/src/apis/sourcerepo/v1.ts
+++ b/src/apis/sourcerepo/v1.ts
@@ -343,12 +343,12 @@ export class Resource$Projects$Repos {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Repo>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Repo>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Repo>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Repo>,
       callback?: BodyResponseCallback<Schema$Repo>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Repo>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Repo>,
       callback?: BodyResponseCallback<Schema$Repo>):
       void|AxiosPromise<Schema$Repo> {
     if (typeof options === 'function') {
@@ -393,12 +393,12 @@ export class Resource$Projects$Repos {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -443,10 +443,10 @@ export class Resource$Projects$Repos {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Repo>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Repo>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Repo>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Repo>,
       callback?: BodyResponseCallback<Schema$Repo>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Repo>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Repo>,
       callback?: BodyResponseCallback<Schema$Repo>):
       void|AxiosPromise<Schema$Repo> {
     if (typeof options === 'function') {
@@ -492,13 +492,13 @@ export class Resource$Projects$Repos {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -547,14 +547,14 @@ export class Resource$Projects$Repos {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListReposResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListReposResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListReposResponse>,
       callback?: BodyResponseCallback<Schema$ListReposResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListReposResponse>,
       callback?: BodyResponseCallback<Schema$ListReposResponse>):
       void|AxiosPromise<Schema$ListReposResponse> {
@@ -602,13 +602,13 @@ export class Resource$Projects$Repos {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -657,15 +657,15 @@ export class Resource$Projects$Repos {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestIamPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>):
diff --git a/src/apis/spanner/v1.ts b/src/apis/spanner/v1.ts
index c8a0127914..5d5d45ce7d 100644
--- a/src/apis/spanner/v1.ts
+++ b/src/apis/spanner/v1.ts
@@ -1654,12 +1654,12 @@ export class Resource$Projects$Instanceconfigs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$InstanceConfig>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InstanceConfig>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InstanceConfig>,
       callback?: BodyResponseCallback<Schema$InstanceConfig>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InstanceConfig>,
       callback?: BodyResponseCallback<Schema$InstanceConfig>):
       void|AxiosPromise<Schema$InstanceConfig> {
@@ -1707,16 +1707,16 @@ export class Resource$Projects$Instanceconfigs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListInstanceConfigsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListInstanceConfigsResponse>,
       callback?: BodyResponseCallback<Schema$ListInstanceConfigsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListInstanceConfigsResponse>,
       callback?: BodyResponseCallback<Schema$ListInstanceConfigsResponse>):
@@ -1799,13 +1799,13 @@ export class Resource$Projects$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1856,12 +1856,12 @@ export class Resource$Projects$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1906,10 +1906,11 @@ export class Resource$Projects$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Instance>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Instance>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Instance>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Instance>,
       callback?: BodyResponseCallback<Schema$Instance>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Instance>,
       callback?: BodyResponseCallback<Schema$Instance>):
       void|AxiosPromise<Schema$Instance> {
@@ -1958,13 +1959,13 @@ export class Resource$Projects$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -2013,14 +2014,15 @@ export class Resource$Projects$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListInstancesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListInstancesResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ListInstancesResponse>,
       callback?: BodyResponseCallback<Schema$ListInstancesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListInstancesResponse>,
       callback?: BodyResponseCallback<Schema$ListInstancesResponse>):
@@ -2090,13 +2092,13 @@ export class Resource$Projects$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2145,13 +2147,13 @@ export class Resource$Projects$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -2202,15 +2204,15 @@ export class Resource$Projects$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestIamPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>):
@@ -2279,13 +2281,13 @@ export class Resource$Projects$Instances$Databases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2332,13 +2334,13 @@ export class Resource$Projects$Instances$Databases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  dropDatabase(params: any, options?: MethodOptions):
+  dropDatabase(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Empty>;
   dropDatabase(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   dropDatabase(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2383,10 +2385,11 @@ export class Resource$Projects$Instances$Databases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Database>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Database>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Database>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Database>,
       callback?: BodyResponseCallback<Schema$Database>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Database>,
       callback?: BodyResponseCallback<Schema$Database>):
       void|AxiosPromise<Schema$Database> {
@@ -2434,15 +2437,15 @@ export class Resource$Projects$Instances$Databases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getDdl(params: any, options?: MethodOptions):
+  getDdl(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GetDatabaseDdlResponse>;
   getDdl(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GetDatabaseDdlResponse>,
       callback?: BodyResponseCallback<Schema$GetDatabaseDdlResponse>): void;
   getDdl(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GetDatabaseDdlResponse>,
       callback?: BodyResponseCallback<Schema$GetDatabaseDdlResponse>):
@@ -2493,13 +2496,13 @@ export class Resource$Projects$Instances$Databases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -2547,14 +2550,15 @@ export class Resource$Projects$Instances$Databases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListDatabasesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListDatabasesResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ListDatabasesResponse>,
       callback?: BodyResponseCallback<Schema$ListDatabasesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListDatabasesResponse>,
       callback?: BodyResponseCallback<Schema$ListDatabasesResponse>):
@@ -2605,13 +2609,13 @@ export class Resource$Projects$Instances$Databases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -2662,15 +2666,15 @@ export class Resource$Projects$Instances$Databases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestIamPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>):
@@ -2724,14 +2728,14 @@ export class Resource$Projects$Instances$Databases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  updateDdl(params: any, options?: MethodOptions):
+  updateDdl(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   updateDdl(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   updateDdl(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2796,12 +2800,12 @@ export class Resource$Projects$Instances$Databases$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancel(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  cancel(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   cancel(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   cancel(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2849,12 +2853,12 @@ export class Resource$Projects$Instances$Databases$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -2901,11 +2905,11 @@ export class Resource$Projects$Instances$Databases$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2962,15 +2966,15 @@ export class Resource$Projects$Instances$Databases$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListOperationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>):
@@ -3031,14 +3035,14 @@ export class Resource$Projects$Instances$Databases$Sessions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  beginTransaction(params: any, options?: MethodOptions):
+  beginTransaction(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Transaction>;
   beginTransaction(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Transaction>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Transaction>,
       callback?: BodyResponseCallback<Schema$Transaction>): void;
   beginTransaction(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Transaction>,
       callback?: BodyResponseCallback<Schema$Transaction>):
       void|AxiosPromise<Schema$Transaction> {
@@ -3091,14 +3095,14 @@ export class Resource$Projects$Instances$Databases$Sessions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  commit(params: any, options?: MethodOptions):
+  commit(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CommitResponse>;
   commit(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CommitResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CommitResponse>,
       callback?: BodyResponseCallback<Schema$CommitResponse>): void;
   commit(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CommitResponse>,
       callback?: BodyResponseCallback<Schema$CommitResponse>):
       void|AxiosPromise<Schema$CommitResponse> {
@@ -3158,12 +3162,14 @@ export class Resource$Projects$Instances$Databases$Sessions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Session>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Session>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Session>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Session>,
       callback?: BodyResponseCallback<Schema$Session>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Session>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Session>,
       callback?: BodyResponseCallback<Schema$Session>):
       void|AxiosPromise<Schema$Session> {
     if (typeof options === 'function') {
@@ -3209,12 +3215,12 @@ export class Resource$Projects$Instances$Databases$Sessions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -3267,14 +3273,14 @@ export class Resource$Projects$Instances$Databases$Sessions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  executeSql(params: any, options?: MethodOptions):
+  executeSql(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ResultSet>;
   executeSql(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ResultSet>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ResultSet>,
       callback?: BodyResponseCallback<Schema$ResultSet>): void;
   executeSql(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ResultSet>,
       callback?: BodyResponseCallback<Schema$ResultSet>):
       void|AxiosPromise<Schema$ResultSet> {
@@ -3325,14 +3331,14 @@ export class Resource$Projects$Instances$Databases$Sessions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  executeStreamingSql(params: any, options?: MethodOptions):
+  executeStreamingSql(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PartialResultSet>;
   executeStreamingSql(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PartialResultSet>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PartialResultSet>,
       callback?: BodyResponseCallback<Schema$PartialResultSet>): void;
   executeStreamingSql(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PartialResultSet>,
       callback?: BodyResponseCallback<Schema$PartialResultSet>):
       void|AxiosPromise<Schema$PartialResultSet> {
@@ -3380,10 +3386,12 @@ export class Resource$Projects$Instances$Databases$Sessions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Session>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Session>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Session>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Session>,
       callback?: BodyResponseCallback<Schema$Session>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Session>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Session>,
       callback?: BodyResponseCallback<Schema$Session>):
       void|AxiosPromise<Schema$Session> {
     if (typeof options === 'function') {
@@ -3431,14 +3439,14 @@ export class Resource$Projects$Instances$Databases$Sessions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListSessionsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListSessionsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListSessionsResponse>,
       callback?: BodyResponseCallback<Schema$ListSessionsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListSessionsResponse>,
       callback?: BodyResponseCallback<Schema$ListSessionsResponse>):
       void|AxiosPromise<Schema$ListSessionsResponse> {
@@ -3493,14 +3501,14 @@ export class Resource$Projects$Instances$Databases$Sessions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  partitionQuery(params: any, options?: MethodOptions):
+  partitionQuery(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PartitionResponse>;
   partitionQuery(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PartitionResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PartitionResponse>,
       callback?: BodyResponseCallback<Schema$PartitionResponse>): void;
   partitionQuery(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PartitionResponse>,
       callback?: BodyResponseCallback<Schema$PartitionResponse>):
       void|AxiosPromise<Schema$PartitionResponse> {
@@ -3554,14 +3562,14 @@ export class Resource$Projects$Instances$Databases$Sessions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  partitionRead(params: any, options?: MethodOptions):
+  partitionRead(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PartitionResponse>;
   partitionRead(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PartitionResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PartitionResponse>,
       callback?: BodyResponseCallback<Schema$PartitionResponse>): void;
   partitionRead(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PartitionResponse>,
       callback?: BodyResponseCallback<Schema$PartitionResponse>):
       void|AxiosPromise<Schema$PartitionResponse> {
@@ -3616,13 +3624,13 @@ export class Resource$Projects$Instances$Databases$Sessions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  read(params: any, options?: MethodOptions): AxiosPromise<Schema$ResultSet>;
+  read(params?: any, options?: MethodOptions): AxiosPromise<Schema$ResultSet>;
   read(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ResultSet>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ResultSet>,
       callback?: BodyResponseCallback<Schema$ResultSet>): void;
   read(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ResultSet>,
       callback?: BodyResponseCallback<Schema$ResultSet>):
       void|AxiosPromise<Schema$ResultSet> {
@@ -3674,12 +3682,12 @@ export class Resource$Projects$Instances$Databases$Sessions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  rollback(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  rollback(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   rollback(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   rollback(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -3729,14 +3737,14 @@ export class Resource$Projects$Instances$Databases$Sessions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  streamingRead(params: any, options?: MethodOptions):
+  streamingRead(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PartialResultSet>;
   streamingRead(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PartialResultSet>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PartialResultSet>,
       callback?: BodyResponseCallback<Schema$PartialResultSet>): void;
   streamingRead(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PartialResultSet>,
       callback?: BodyResponseCallback<Schema$PartialResultSet>):
       void|AxiosPromise<Schema$PartialResultSet> {
@@ -3804,12 +3812,12 @@ export class Resource$Projects$Instances$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancel(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  cancel(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   cancel(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   cancel(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -3857,12 +3865,12 @@ export class Resource$Projects$Instances$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -3909,11 +3917,11 @@ export class Resource$Projects$Instances$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3970,15 +3978,15 @@ export class Resource$Projects$Instances$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListOperationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>):
diff --git a/src/apis/spectrum/v1explorer.ts b/src/apis/spectrum/v1explorer.ts
index 54f577799d..147ceedc5b 100644
--- a/src/apis/spectrum/v1explorer.ts
+++ b/src/apis/spectrum/v1explorer.ts
@@ -1141,15 +1141,15 @@ export class Resource$Paws {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getSpectrum(params: any, options?: MethodOptions):
+  getSpectrum(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PawsGetSpectrumResponse>;
   getSpectrum(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$PawsGetSpectrumResponse>,
       callback?: BodyResponseCallback<Schema$PawsGetSpectrumResponse>): void;
   getSpectrum(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$PawsGetSpectrumResponse>,
       callback?: BodyResponseCallback<Schema$PawsGetSpectrumResponse>):
@@ -1198,16 +1198,16 @@ export class Resource$Paws {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getSpectrumBatch(params: any, options?: MethodOptions):
+  getSpectrumBatch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PawsGetSpectrumBatchResponse>;
   getSpectrumBatch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$PawsGetSpectrumBatchResponse>,
       callback?: BodyResponseCallback<Schema$PawsGetSpectrumBatchResponse>):
       void;
   getSpectrumBatch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$PawsGetSpectrumBatchResponse>,
       callback?: BodyResponseCallback<Schema$PawsGetSpectrumBatchResponse>):
@@ -1257,14 +1257,14 @@ export class Resource$Paws {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  init(params: any, options?: MethodOptions):
+  init(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PawsInitResponse>;
   init(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PawsInitResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PawsInitResponse>,
       callback?: BodyResponseCallback<Schema$PawsInitResponse>): void;
   init(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PawsInitResponse>,
       callback?: BodyResponseCallback<Schema$PawsInitResponse>):
       void|AxiosPromise<Schema$PawsInitResponse> {
@@ -1314,16 +1314,16 @@ export class Resource$Paws {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  notifySpectrumUse(params: any, options?: MethodOptions):
+  notifySpectrumUse(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PawsNotifySpectrumUseResponse>;
   notifySpectrumUse(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$PawsNotifySpectrumUseResponse>,
       callback?: BodyResponseCallback<Schema$PawsNotifySpectrumUseResponse>):
       void;
   notifySpectrumUse(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$PawsNotifySpectrumUseResponse>,
       callback?: BodyResponseCallback<Schema$PawsNotifySpectrumUseResponse>):
@@ -1373,14 +1373,14 @@ export class Resource$Paws {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  register(params: any, options?: MethodOptions):
+  register(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PawsRegisterResponse>;
   register(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PawsRegisterResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PawsRegisterResponse>,
       callback?: BodyResponseCallback<Schema$PawsRegisterResponse>): void;
   register(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PawsRegisterResponse>,
       callback?: BodyResponseCallback<Schema$PawsRegisterResponse>):
       void|AxiosPromise<Schema$PawsRegisterResponse> {
@@ -1429,15 +1429,15 @@ export class Resource$Paws {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  verifyDevice(params: any, options?: MethodOptions):
+  verifyDevice(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PawsVerifyDeviceResponse>;
   verifyDevice(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$PawsVerifyDeviceResponse>,
       callback?: BodyResponseCallback<Schema$PawsVerifyDeviceResponse>): void;
   verifyDevice(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$PawsVerifyDeviceResponse>,
       callback?: BodyResponseCallback<Schema$PawsVerifyDeviceResponse>):
diff --git a/src/apis/speech/v1.ts b/src/apis/speech/v1.ts
index be87a0bbad..3e774b1c62 100644
--- a/src/apis/speech/v1.ts
+++ b/src/apis/speech/v1.ts
@@ -374,11 +374,11 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -440,14 +440,14 @@ export class Resource$Speech {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  longrunningrecognize(params: any, options?: MethodOptions):
+  longrunningrecognize(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   longrunningrecognize(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   longrunningrecognize(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -495,14 +495,14 @@ export class Resource$Speech {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  recognize(params: any, options?: MethodOptions):
+  recognize(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RecognizeResponse>;
   recognize(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RecognizeResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RecognizeResponse>,
       callback?: BodyResponseCallback<Schema$RecognizeResponse>): void;
   recognize(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RecognizeResponse>,
       callback?: BodyResponseCallback<Schema$RecognizeResponse>):
       void|AxiosPromise<Schema$RecognizeResponse> {
diff --git a/src/apis/speech/v1beta1.ts b/src/apis/speech/v1beta1.ts
index 40969af17a..1dd3b7b886 100644
--- a/src/apis/speech/v1beta1.ts
+++ b/src/apis/speech/v1beta1.ts
@@ -335,11 +335,11 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -402,14 +402,14 @@ export class Resource$Speech {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  asyncrecognize(params: any, options?: MethodOptions):
+  asyncrecognize(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   asyncrecognize(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   asyncrecognize(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -457,14 +457,15 @@ export class Resource$Speech {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  syncrecognize(params: any, options?: MethodOptions):
+  syncrecognize(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SyncRecognizeResponse>;
   syncrecognize(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SyncRecognizeResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$SyncRecognizeResponse>,
       callback?: BodyResponseCallback<Schema$SyncRecognizeResponse>): void;
   syncrecognize(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SyncRecognizeResponse>,
       callback?: BodyResponseCallback<Schema$SyncRecognizeResponse>):
diff --git a/src/apis/sqladmin/v1beta3.ts b/src/apis/sqladmin/v1beta3.ts
index 09fae58e4d..950849e7f5 100644
--- a/src/apis/sqladmin/v1beta3.ts
+++ b/src/apis/sqladmin/v1beta3.ts
@@ -1054,11 +1054,11 @@ export class Resource$Backupruns {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$BackupRun>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BackupRun>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$BackupRun>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BackupRun>,
       callback?: BodyResponseCallback<Schema$BackupRun>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BackupRun>,
       callback?: BodyResponseCallback<Schema$BackupRun>):
       void|AxiosPromise<Schema$BackupRun> {
@@ -1111,15 +1111,15 @@ export class Resource$Backupruns {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BackupRunsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$BackupRunsListResponse>,
       callback?: BodyResponseCallback<Schema$BackupRunsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$BackupRunsListResponse>,
       callback?: BodyResponseCallback<Schema$BackupRunsListResponse>):
@@ -1181,14 +1181,14 @@ export class Resource$Flags {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FlagsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$FlagsListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$FlagsListResponse>,
       callback?: BodyResponseCallback<Schema$FlagsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$FlagsListResponse>,
       callback?: BodyResponseCallback<Schema$FlagsListResponse>):
       void|AxiosPromise<Schema$FlagsListResponse> {
@@ -1247,15 +1247,15 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  clone(params: any, options?: MethodOptions):
+  clone(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstancesCloneResponse>;
   clone(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InstancesCloneResponse>,
       callback?: BodyResponseCallback<Schema$InstancesCloneResponse>): void;
   clone(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InstancesCloneResponse>,
       callback?: BodyResponseCallback<Schema$InstancesCloneResponse>):
@@ -1304,15 +1304,15 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions):
+  delete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstancesDeleteResponse>;
   delete(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InstancesDeleteResponse>,
       callback?: BodyResponseCallback<Schema$InstancesDeleteResponse>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InstancesDeleteResponse>,
       callback?: BodyResponseCallback<Schema$InstancesDeleteResponse>):
@@ -1364,15 +1364,15 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  export(params: any, options?: MethodOptions):
+  export(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstancesExportResponse>;
   export(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InstancesExportResponse>,
       callback?: BodyResponseCallback<Schema$InstancesExportResponse>): void;
   export(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InstancesExportResponse>,
       callback?: BodyResponseCallback<Schema$InstancesExportResponse>):
@@ -1422,12 +1422,12 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$DatabaseInstance>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DatabaseInstance>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DatabaseInstance>,
       callback?: BodyResponseCallback<Schema$DatabaseInstance>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DatabaseInstance>,
       callback?: BodyResponseCallback<Schema$DatabaseInstance>):
       void|AxiosPromise<Schema$DatabaseInstance> {
@@ -1478,9 +1478,9 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-import(params: any, options?: MethodOptions): AxiosPromise<Schema$InstancesImportResponse>;
-import(params: any, options: MethodOptions|BodyResponseCallback<Schema$InstancesImportResponse>, callback?: BodyResponseCallback<Schema$InstancesImportResponse>): void;
-import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$InstancesImportResponse>, callback?: BodyResponseCallback<Schema$InstancesImportResponse>): void|AxiosPromise<Schema$InstancesImportResponse> {if(typeof options === 'function') {
+import(params?: any, options?: MethodOptions): AxiosPromise<Schema$InstancesImportResponse>;
+import(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$InstancesImportResponse>, callback?: BodyResponseCallback<Schema$InstancesImportResponse>): void;
+import(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$InstancesImportResponse>, callback?: BodyResponseCallback<Schema$InstancesImportResponse>): void|AxiosPromise<Schema$InstancesImportResponse> {if(typeof options === 'function') {
     callback = options;
     options = {};
   } if(typeof params === 'function') {
@@ -1505,14 +1505,14 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Instance
  * @param {callback} callback The callback that handles the response.
  * @return {object} Request object
  */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$InstancesInsertResponse>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$InstancesInsertResponse>;
   insert(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InstancesInsertResponse>,
       callback?: BodyResponseCallback<Schema$InstancesInsertResponse>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InstancesInsertResponse>,
       callback?: BodyResponseCallback<Schema$InstancesInsertResponse>):
@@ -1563,14 +1563,15 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Instance
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstancesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InstancesListResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$InstancesListResponse>,
       callback?: BodyResponseCallback<Schema$InstancesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InstancesListResponse>,
       callback?: BodyResponseCallback<Schema$InstancesListResponse>):
@@ -1621,15 +1622,15 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Instance
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstancesUpdateResponse>;
   patch(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InstancesUpdateResponse>,
       callback?: BodyResponseCallback<Schema$InstancesUpdateResponse>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InstancesUpdateResponse>,
       callback?: BodyResponseCallback<Schema$InstancesUpdateResponse>):
@@ -1680,16 +1681,16 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Instance
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  promoteReplica(params: any, options?: MethodOptions):
+  promoteReplica(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstancesPromoteReplicaResponse>;
   promoteReplica(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InstancesPromoteReplicaResponse>,
       callback?: BodyResponseCallback<Schema$InstancesPromoteReplicaResponse>):
       void;
   promoteReplica(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InstancesPromoteReplicaResponse>,
       callback?: BodyResponseCallback<Schema$InstancesPromoteReplicaResponse>):
@@ -1743,16 +1744,16 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Instance
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resetSslConfig(params: any, options?: MethodOptions):
+  resetSslConfig(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstancesResetSslConfigResponse>;
   resetSslConfig(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InstancesResetSslConfigResponse>,
       callback?: BodyResponseCallback<Schema$InstancesResetSslConfigResponse>):
       void;
   resetSslConfig(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InstancesResetSslConfigResponse>,
       callback?: BodyResponseCallback<Schema$InstancesResetSslConfigResponse>):
@@ -1805,15 +1806,15 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Instance
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  restart(params: any, options?: MethodOptions):
+  restart(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstancesRestartResponse>;
   restart(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InstancesRestartResponse>,
       callback?: BodyResponseCallback<Schema$InstancesRestartResponse>): void;
   restart(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InstancesRestartResponse>,
       callback?: BodyResponseCallback<Schema$InstancesRestartResponse>):
@@ -1866,16 +1867,16 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Instance
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  restoreBackup(params: any, options?: MethodOptions):
+  restoreBackup(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstancesRestoreBackupResponse>;
   restoreBackup(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InstancesRestoreBackupResponse>,
       callback?: BodyResponseCallback<Schema$InstancesRestoreBackupResponse>):
       void;
   restoreBackup(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InstancesRestoreBackupResponse>,
       callback?: BodyResponseCallback<Schema$InstancesRestoreBackupResponse>):
@@ -1930,16 +1931,16 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Instance
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setRootPassword(params: any, options?: MethodOptions):
+  setRootPassword(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstancesSetRootPasswordResponse>;
   setRootPassword(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InstancesSetRootPasswordResponse>,
       callback?: BodyResponseCallback<Schema$InstancesSetRootPasswordResponse>):
       void;
   setRootPassword(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InstancesSetRootPasswordResponse>,
       callback?: BodyResponseCallback<Schema$InstancesSetRootPasswordResponse>):
@@ -1993,15 +1994,15 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Instance
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstancesUpdateResponse>;
   update(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$InstancesUpdateResponse>,
       callback?: BodyResponseCallback<Schema$InstancesUpdateResponse>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InstancesUpdateResponse>,
       callback?: BodyResponseCallback<Schema$InstancesUpdateResponse>):
@@ -2065,12 +2066,12 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$InstanceOperation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InstanceOperation>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$InstanceOperation>,
       callback?: BodyResponseCallback<Schema$InstanceOperation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$InstanceOperation>,
       callback?: BodyResponseCallback<Schema$InstanceOperation>):
       void|AxiosPromise<Schema$InstanceOperation> {
@@ -2123,15 +2124,15 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OperationsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OperationsListResponse>,
       callback?: BodyResponseCallback<Schema$OperationsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OperationsListResponse>,
       callback?: BodyResponseCallback<Schema$OperationsListResponse>):
@@ -2195,15 +2196,15 @@ export class Resource$Sslcerts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions):
+  delete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SslCertsDeleteResponse>;
   delete(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SslCertsDeleteResponse>,
       callback?: BodyResponseCallback<Schema$SslCertsDeleteResponse>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SslCertsDeleteResponse>,
       callback?: BodyResponseCallback<Schema$SslCertsDeleteResponse>):
@@ -2255,10 +2256,12 @@ export class Resource$Sslcerts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$SslCert>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$SslCert>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$SslCert>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SslCert>,
       callback?: BodyResponseCallback<Schema$SslCert>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$SslCert>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SslCert>,
       callback?: BodyResponseCallback<Schema$SslCert>):
       void|AxiosPromise<Schema$SslCert> {
     if (typeof options === 'function') {
@@ -2309,15 +2312,15 @@ export class Resource$Sslcerts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SslCertsInsertResponse>;
   insert(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SslCertsInsertResponse>,
       callback?: BodyResponseCallback<Schema$SslCertsInsertResponse>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SslCertsInsertResponse>,
       callback?: BodyResponseCallback<Schema$SslCertsInsertResponse>):
@@ -2369,14 +2372,14 @@ export class Resource$Sslcerts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SslCertsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SslCertsListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SslCertsListResponse>,
       callback?: BodyResponseCallback<Schema$SslCertsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SslCertsListResponse>,
       callback?: BodyResponseCallback<Schema$SslCertsListResponse>):
       void|AxiosPromise<Schema$SslCertsListResponse> {
@@ -2438,14 +2441,14 @@ export class Resource$Tiers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TiersListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TiersListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TiersListResponse>,
       callback?: BodyResponseCallback<Schema$TiersListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TiersListResponse>,
       callback?: BodyResponseCallback<Schema$TiersListResponse>):
       void|AxiosPromise<Schema$TiersListResponse> {
diff --git a/src/apis/sqladmin/v1beta4.ts b/src/apis/sqladmin/v1beta4.ts
index fa49ed100e..927e07c5f7 100644
--- a/src/apis/sqladmin/v1beta4.ts
+++ b/src/apis/sqladmin/v1beta4.ts
@@ -1441,13 +1441,13 @@ export class Resource$Backupruns {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1498,11 +1498,11 @@ export class Resource$Backupruns {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$BackupRun>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BackupRun>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$BackupRun>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BackupRun>,
       callback?: BodyResponseCallback<Schema$BackupRun>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BackupRun>,
       callback?: BodyResponseCallback<Schema$BackupRun>):
       void|AxiosPromise<Schema$BackupRun> {
@@ -1554,13 +1554,13 @@ export class Resource$Backupruns {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1613,15 +1613,15 @@ export class Resource$Backupruns {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BackupRunsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$BackupRunsListResponse>,
       callback?: BodyResponseCallback<Schema$BackupRunsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$BackupRunsListResponse>,
       callback?: BodyResponseCallback<Schema$BackupRunsListResponse>):
@@ -1685,13 +1685,13 @@ export class Resource$Databases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1743,10 +1743,11 @@ export class Resource$Databases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Database>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Database>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Database>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Database>,
       callback?: BodyResponseCallback<Schema$Database>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Database>,
       callback?: BodyResponseCallback<Schema$Database>):
       void|AxiosPromise<Schema$Database> {
@@ -1798,13 +1799,13 @@ export class Resource$Databases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1854,14 +1855,15 @@ export class Resource$Databases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DatabasesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DatabasesListResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$DatabasesListResponse>,
       callback?: BodyResponseCallback<Schema$DatabasesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$DatabasesListResponse>,
       callback?: BodyResponseCallback<Schema$DatabasesListResponse>):
@@ -1915,13 +1917,13 @@ export class Resource$Databases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1974,13 +1976,13 @@ export class Resource$Databases {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2041,14 +2043,14 @@ export class Resource$Flags {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FlagsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$FlagsListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$FlagsListResponse>,
       callback?: BodyResponseCallback<Schema$FlagsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$FlagsListResponse>,
       callback?: BodyResponseCallback<Schema$FlagsListResponse>):
       void|AxiosPromise<Schema$FlagsListResponse> {
@@ -2109,13 +2111,13 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  clone(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  clone(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   clone(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   clone(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2164,13 +2166,13 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2220,14 +2222,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  demoteMaster(params: any, options?: MethodOptions):
+  demoteMaster(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   demoteMaster(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   demoteMaster(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2279,13 +2281,13 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  export(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  export(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   export(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   export(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2335,14 +2337,14 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  failover(params: any, options?: MethodOptions):
+  failover(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   failover(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   failover(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2393,12 +2395,12 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$DatabaseInstance>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$DatabaseInstance>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$DatabaseInstance>,
       callback?: BodyResponseCallback<Schema$DatabaseInstance>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$DatabaseInstance>,
       callback?: BodyResponseCallback<Schema$DatabaseInstance>):
       void|AxiosPromise<Schema$DatabaseInstance> {
@@ -2449,9 +2451,9 @@ export class Resource$Instances {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-import(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-import(params: any, options: MethodOptions|BodyResponseCallback<Schema$Operation>, callback?: BodyResponseCallback<Schema$Operation>): void;
-import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Operation>, callback?: BodyResponseCallback<Schema$Operation>): void|AxiosPromise<Schema$Operation> {if(typeof options === 'function') {
+import(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+import(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Operation>, callback?: BodyResponseCallback<Schema$Operation>): void;
+import(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Operation>, callback?: BodyResponseCallback<Schema$Operation>): void|AxiosPromise<Schema$Operation> {if(typeof options === 'function') {
     callback = options;
     options = {};
   } if(typeof params === 'function') {
@@ -2476,13 +2478,13 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Operatio
  * @param {callback} callback The callback that handles the response.
  * @return {object} Request object
  */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2533,14 +2535,15 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Operatio
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$InstancesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$InstancesListResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$InstancesListResponse>,
       callback?: BodyResponseCallback<Schema$InstancesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$InstancesListResponse>,
       callback?: BodyResponseCallback<Schema$InstancesListResponse>):
@@ -2593,13 +2596,13 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Operatio
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2649,14 +2652,14 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Operatio
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  promoteReplica(params: any, options?: MethodOptions):
+  promoteReplica(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   promoteReplica(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   promoteReplica(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2709,14 +2712,14 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Operatio
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resetSslConfig(params: any, options?: MethodOptions):
+  resetSslConfig(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   resetSslConfig(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   resetSslConfig(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2766,13 +2769,14 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Operatio
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  restart(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  restart(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Operation>;
   restart(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   restart(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2823,14 +2827,14 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Operatio
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  restoreBackup(params: any, options?: MethodOptions):
+  restoreBackup(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   restoreBackup(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   restoreBackup(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2880,14 +2884,14 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Operatio
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  startReplica(params: any, options?: MethodOptions):
+  startReplica(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   startReplica(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   startReplica(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2937,14 +2941,14 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Operatio
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  stopReplica(params: any, options?: MethodOptions):
+  stopReplica(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   stopReplica(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   stopReplica(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -2995,14 +2999,14 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Operatio
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  truncateLog(params: any, options?: MethodOptions):
+  truncateLog(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   truncateLog(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   truncateLog(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3055,13 +3059,13 @@ import(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Operatio
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3123,11 +3127,11 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3179,15 +3183,15 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$OperationsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$OperationsListResponse>,
       callback?: BodyResponseCallback<Schema$OperationsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$OperationsListResponse>,
       callback?: BodyResponseCallback<Schema$OperationsListResponse>):
@@ -3252,13 +3256,15 @@ export class Resource$Sslcerts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  createEphemeral(params: any, options?: MethodOptions):
+  createEphemeral(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SslCert>;
   createEphemeral(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$SslCert>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SslCert>,
       callback?: BodyResponseCallback<Schema$SslCert>): void;
   createEphemeral(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$SslCert>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SslCert>,
       callback?: BodyResponseCallback<Schema$SslCert>):
       void|AxiosPromise<Schema$SslCert> {
     if (typeof options === 'function') {
@@ -3309,13 +3315,13 @@ export class Resource$Sslcerts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3368,10 +3374,12 @@ export class Resource$Sslcerts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$SslCert>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$SslCert>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$SslCert>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SslCert>,
       callback?: BodyResponseCallback<Schema$SslCert>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$SslCert>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SslCert>,
       callback?: BodyResponseCallback<Schema$SslCert>):
       void|AxiosPromise<Schema$SslCert> {
     if (typeof options === 'function') {
@@ -3423,15 +3431,15 @@ export class Resource$Sslcerts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SslCertsInsertResponse>;
   insert(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SslCertsInsertResponse>,
       callback?: BodyResponseCallback<Schema$SslCertsInsertResponse>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SslCertsInsertResponse>,
       callback?: BodyResponseCallback<Schema$SslCertsInsertResponse>):
@@ -3482,14 +3490,14 @@ export class Resource$Sslcerts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SslCertsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SslCertsListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SslCertsListResponse>,
       callback?: BodyResponseCallback<Schema$SslCertsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SslCertsListResponse>,
       callback?: BodyResponseCallback<Schema$SslCertsListResponse>):
       void|AxiosPromise<Schema$SslCertsListResponse> {
@@ -3551,14 +3559,14 @@ export class Resource$Tiers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TiersListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TiersListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TiersListResponse>,
       callback?: BodyResponseCallback<Schema$TiersListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TiersListResponse>,
       callback?: BodyResponseCallback<Schema$TiersListResponse>):
       void|AxiosPromise<Schema$TiersListResponse> {
@@ -3620,13 +3628,13 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3676,13 +3684,13 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -3731,14 +3739,14 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$UsersListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UsersListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UsersListResponse>,
       callback?: BodyResponseCallback<Schema$UsersListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UsersListResponse>,
       callback?: BodyResponseCallback<Schema$UsersListResponse>):
       void|AxiosPromise<Schema$UsersListResponse> {
@@ -3790,13 +3798,13 @@ export class Resource$Users {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
diff --git a/src/apis/storage/v1.ts b/src/apis/storage/v1.ts
index 8374ac6740..bbe5fb1708 100644
--- a/src/apis/storage/v1.ts
+++ b/src/apis/storage/v1.ts
@@ -871,12 +871,12 @@ export class Resource$Bucketaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -981,12 +981,12 @@ export class Resource$Bucketaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$BucketAccessControl>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BucketAccessControl>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BucketAccessControl>,
       callback?: BodyResponseCallback<Schema$BucketAccessControl>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BucketAccessControl>,
       callback?: BodyResponseCallback<Schema$BucketAccessControl>):
       void|AxiosPromise<Schema$BucketAccessControl> {
@@ -1091,14 +1091,14 @@ export class Resource$Bucketaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BucketAccessControl>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BucketAccessControl>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BucketAccessControl>,
       callback?: BodyResponseCallback<Schema$BucketAccessControl>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BucketAccessControl>,
       callback?: BodyResponseCallback<Schema$BucketAccessControl>):
       void|AxiosPromise<Schema$BucketAccessControl> {
@@ -1198,14 +1198,14 @@ export class Resource$Bucketaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BucketAccessControls>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BucketAccessControls>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BucketAccessControls>,
       callback?: BodyResponseCallback<Schema$BucketAccessControls>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BucketAccessControls>,
       callback?: BodyResponseCallback<Schema$BucketAccessControls>):
       void|AxiosPromise<Schema$BucketAccessControls> {
@@ -1318,14 +1318,14 @@ export class Resource$Bucketaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BucketAccessControl>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BucketAccessControl>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BucketAccessControl>,
       callback?: BodyResponseCallback<Schema$BucketAccessControl>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BucketAccessControl>,
       callback?: BodyResponseCallback<Schema$BucketAccessControl>):
       void|AxiosPromise<Schema$BucketAccessControl> {
@@ -1438,14 +1438,14 @@ export class Resource$Bucketaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BucketAccessControl>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BucketAccessControl>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BucketAccessControl>,
       callback?: BodyResponseCallback<Schema$BucketAccessControl>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BucketAccessControl>,
       callback?: BodyResponseCallback<Schema$BucketAccessControl>):
       void|AxiosPromise<Schema$BucketAccessControl> {
@@ -1556,12 +1556,12 @@ export class Resource$Buckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1662,10 +1662,10 @@ export class Resource$Buckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Bucket>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Bucket>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Bucket>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
       callback?: BodyResponseCallback<Schema$Bucket>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
       callback?: BodyResponseCallback<Schema$Bucket>):
       void|AxiosPromise<Schema$Bucket> {
     if (typeof options === 'function') {
@@ -1764,13 +1764,13 @@ export class Resource$Buckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -1877,12 +1877,12 @@ export class Resource$Buckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Bucket>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Bucket>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Bucket>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
       callback?: BodyResponseCallback<Schema$Bucket>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
       callback?: BodyResponseCallback<Schema$Bucket>):
       void|AxiosPromise<Schema$Bucket> {
     if (typeof options === 'function') {
@@ -1997,12 +1997,14 @@ export class Resource$Buckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Buckets>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Buckets>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Buckets>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Buckets>,
       callback?: BodyResponseCallback<Schema$Buckets>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Buckets>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Buckets>,
       callback?: BodyResponseCallback<Schema$Buckets>):
       void|AxiosPromise<Schema$Buckets> {
     if (typeof options === 'function') {
@@ -2049,13 +2051,13 @@ export class Resource$Buckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  lockRetentionPolicy(params: any, options?: MethodOptions):
+  lockRetentionPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Bucket>;
   lockRetentionPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Bucket>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
       callback?: BodyResponseCallback<Schema$Bucket>): void;
   lockRetentionPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
       callback?: BodyResponseCallback<Schema$Bucket>):
       void|AxiosPromise<Schema$Bucket> {
     if (typeof options === 'function') {
@@ -2168,12 +2170,12 @@ export class Resource$Buckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Bucket>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Bucket>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Bucket>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
       callback?: BodyResponseCallback<Schema$Bucket>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
       callback?: BodyResponseCallback<Schema$Bucket>):
       void|AxiosPromise<Schema$Bucket> {
     if (typeof options === 'function') {
@@ -2279,13 +2281,13 @@ export class Resource$Buckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -2389,15 +2391,15 @@ export class Resource$Buckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestIamPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>):
@@ -2511,12 +2513,12 @@ export class Resource$Buckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Bucket>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Bucket>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Bucket>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
       callback?: BodyResponseCallback<Schema$Bucket>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
       callback?: BodyResponseCallback<Schema$Bucket>):
       void|AxiosPromise<Schema$Bucket> {
     if (typeof options === 'function') {
@@ -2624,12 +2626,12 @@ export class Resource$Channels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  stop(params: any, options?: MethodOptions): AxiosPromise<void>;
+  stop(params?: any, options?: MethodOptions): AxiosPromise<void>;
   stop(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   stop(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2743,12 +2745,12 @@ export class Resource$Defaultobjectaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2851,12 +2853,12 @@ export class Resource$Defaultobjectaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$ObjectAccessControl>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>):
       void|AxiosPromise<Schema$ObjectAccessControl> {
@@ -2959,14 +2961,14 @@ export class Resource$Defaultobjectaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ObjectAccessControl>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>):
       void|AxiosPromise<Schema$ObjectAccessControl> {
@@ -3066,14 +3068,14 @@ export class Resource$Defaultobjectaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ObjectAccessControls>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControls>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControls>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControls>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControls>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControls>):
       void|AxiosPromise<Schema$ObjectAccessControls> {
@@ -3184,14 +3186,14 @@ export class Resource$Defaultobjectaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ObjectAccessControl>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>):
       void|AxiosPromise<Schema$ObjectAccessControl> {
@@ -3302,14 +3304,14 @@ export class Resource$Defaultobjectaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ObjectAccessControl>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>):
       void|AxiosPromise<Schema$ObjectAccessControl> {
@@ -3422,12 +3424,12 @@ export class Resource$Notifications {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -3530,11 +3532,11 @@ export class Resource$Notifications {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Notification>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Notification>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Notification>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Notification>,
       callback?: BodyResponseCallback<Schema$Notification>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Notification>,
       callback?: BodyResponseCallback<Schema$Notification>):
       void|AxiosPromise<Schema$Notification> {
@@ -3640,14 +3642,14 @@ export class Resource$Notifications {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Notification>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Notification>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Notification>,
       callback?: BodyResponseCallback<Schema$Notification>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Notification>,
       callback?: BodyResponseCallback<Schema$Notification>):
       void|AxiosPromise<Schema$Notification> {
@@ -3747,14 +3749,14 @@ export class Resource$Notifications {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Notifications>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Notifications>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Notifications>,
       callback?: BodyResponseCallback<Schema$Notifications>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Notifications>,
       callback?: BodyResponseCallback<Schema$Notifications>):
       void|AxiosPromise<Schema$Notifications> {
@@ -3877,12 +3879,12 @@ export class Resource$Objectaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -3994,12 +3996,12 @@ export class Resource$Objectaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$ObjectAccessControl>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>):
       void|AxiosPromise<Schema$ObjectAccessControl> {
@@ -4111,14 +4113,14 @@ export class Resource$Objectaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ObjectAccessControl>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>):
       void|AxiosPromise<Schema$ObjectAccessControl> {
@@ -4225,14 +4227,14 @@ export class Resource$Objectaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ObjectAccessControls>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControls>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControls>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControls>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControls>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControls>):
       void|AxiosPromise<Schema$ObjectAccessControls> {
@@ -4352,14 +4354,14 @@ export class Resource$Objectaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ObjectAccessControl>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>):
       void|AxiosPromise<Schema$ObjectAccessControl> {
@@ -4479,14 +4481,14 @@ export class Resource$Objectaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ObjectAccessControl>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>):
       void|AxiosPromise<Schema$ObjectAccessControl> {
@@ -4616,12 +4618,12 @@ export class Resource$Objects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  compose(params: any, options?: MethodOptions): AxiosPromise<Schema$Object>;
+  compose(params?: any, options?: MethodOptions): AxiosPromise<Schema$Object>;
   compose(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Object>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
       callback?: BodyResponseCallback<Schema$Object>): void;
   compose(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
       callback?: BodyResponseCallback<Schema$Object>):
       void|AxiosPromise<Schema$Object> {
     if (typeof options === 'function') {
@@ -4761,12 +4763,12 @@ export class Resource$Objects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  copy(params: any, options?: MethodOptions): AxiosPromise<Schema$Object>;
+  copy(params?: any, options?: MethodOptions): AxiosPromise<Schema$Object>;
   copy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Object>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
       callback?: BodyResponseCallback<Schema$Object>): void;
   copy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
       callback?: BodyResponseCallback<Schema$Object>):
       void|AxiosPromise<Schema$Object> {
     if (typeof options === 'function') {
@@ -4881,12 +4883,12 @@ export class Resource$Objects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -5000,10 +5002,10 @@ export class Resource$Objects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Object>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Object>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Object>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
       callback?: BodyResponseCallback<Schema$Object>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
       callback?: BodyResponseCallback<Schema$Object>):
       void|AxiosPromise<Schema$Object> {
     if (typeof options === 'function') {
@@ -5109,13 +5111,13 @@ export class Resource$Objects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getIamPolicy(params: any, options?: MethodOptions):
+  getIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   getIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   getIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -5240,12 +5242,12 @@ export class Resource$Objects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Object>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Object>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Object>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
       callback?: BodyResponseCallback<Schema$Object>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
       callback?: BodyResponseCallback<Schema$Object>):
       void|AxiosPromise<Schema$Object> {
     if (typeof options === 'function') {
@@ -5365,12 +5367,14 @@ export class Resource$Objects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Objects>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Objects>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Objects>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Objects>,
       callback?: BodyResponseCallback<Schema$Objects>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Objects>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Objects>,
       callback?: BodyResponseCallback<Schema$Objects>):
       void|AxiosPromise<Schema$Objects> {
     if (typeof options === 'function') {
@@ -5489,12 +5493,12 @@ export class Resource$Objects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Object>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Object>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Object>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
       callback?: BodyResponseCallback<Schema$Object>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
       callback?: BodyResponseCallback<Schema$Object>):
       void|AxiosPromise<Schema$Object> {
     if (typeof options === 'function') {
@@ -5635,14 +5639,14 @@ export class Resource$Objects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  rewrite(params: any, options?: MethodOptions):
+  rewrite(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RewriteResponse>;
   rewrite(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RewriteResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RewriteResponse>,
       callback?: BodyResponseCallback<Schema$RewriteResponse>): void;
   rewrite(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RewriteResponse>,
       callback?: BodyResponseCallback<Schema$RewriteResponse>):
       void|AxiosPromise<Schema$RewriteResponse> {
@@ -5762,13 +5766,13 @@ export class Resource$Objects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setIamPolicy(params: any, options?: MethodOptions):
+  setIamPolicy(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Policy>;
   setIamPolicy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>): void;
   setIamPolicy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Policy>,
       callback?: BodyResponseCallback<Schema$Policy>):
       void|AxiosPromise<Schema$Policy> {
     if (typeof options === 'function') {
@@ -5879,15 +5883,15 @@ export class Resource$Objects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  testIamPermissions(params: any, options?: MethodOptions):
+  testIamPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TestIamPermissionsResponse>;
   testIamPermissions(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
   testIamPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestIamPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$TestIamPermissionsResponse>):
@@ -6009,12 +6013,12 @@ export class Resource$Objects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Object>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Object>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Object>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
       callback?: BodyResponseCallback<Schema$Object>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
       callback?: BodyResponseCallback<Schema$Object>):
       void|AxiosPromise<Schema$Object> {
     if (typeof options === 'function') {
@@ -6124,12 +6128,14 @@ export class Resource$Objects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  watchAll(params: any, options?: MethodOptions): AxiosPromise<Schema$Channel>;
+  watchAll(params?: any, options?: MethodOptions): AxiosPromise<Schema$Channel>;
   watchAll(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Channel>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
       callback?: BodyResponseCallback<Schema$Channel>): void;
   watchAll(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
       callback?: BodyResponseCallback<Schema$Channel>):
       void|AxiosPromise<Schema$Channel> {
     if (typeof options === 'function') {
@@ -6254,12 +6260,12 @@ export class Resource$Projects$Serviceaccount {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$ServiceAccount>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ServiceAccount>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ServiceAccount>,
       callback?: BodyResponseCallback<Schema$ServiceAccount>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ServiceAccount>,
       callback?: BodyResponseCallback<Schema$ServiceAccount>):
       void|AxiosPromise<Schema$ServiceAccount> {
diff --git a/src/apis/storage/v1beta1.ts b/src/apis/storage/v1beta1.ts
index 568fcd4a0b..ca77026031 100644
--- a/src/apis/storage/v1beta1.ts
+++ b/src/apis/storage/v1beta1.ts
@@ -372,12 +372,12 @@ export class Resource$Bucketaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -424,12 +424,12 @@ export class Resource$Bucketaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$BucketAccessControl>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BucketAccessControl>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BucketAccessControl>,
       callback?: BodyResponseCallback<Schema$BucketAccessControl>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BucketAccessControl>,
       callback?: BodyResponseCallback<Schema$BucketAccessControl>):
       void|AxiosPromise<Schema$BucketAccessControl> {
@@ -477,14 +477,14 @@ export class Resource$Bucketaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BucketAccessControl>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BucketAccessControl>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BucketAccessControl>,
       callback?: BodyResponseCallback<Schema$BucketAccessControl>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BucketAccessControl>,
       callback?: BodyResponseCallback<Schema$BucketAccessControl>):
       void|AxiosPromise<Schema$BucketAccessControl> {
@@ -531,14 +531,14 @@ export class Resource$Bucketaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BucketAccessControls>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BucketAccessControls>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BucketAccessControls>,
       callback?: BodyResponseCallback<Schema$BucketAccessControls>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BucketAccessControls>,
       callback?: BodyResponseCallback<Schema$BucketAccessControls>):
       void|AxiosPromise<Schema$BucketAccessControls> {
@@ -588,14 +588,14 @@ export class Resource$Bucketaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BucketAccessControl>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BucketAccessControl>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BucketAccessControl>,
       callback?: BodyResponseCallback<Schema$BucketAccessControl>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BucketAccessControl>,
       callback?: BodyResponseCallback<Schema$BucketAccessControl>):
       void|AxiosPromise<Schema$BucketAccessControl> {
@@ -644,14 +644,14 @@ export class Resource$Bucketaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BucketAccessControl>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BucketAccessControl>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BucketAccessControl>,
       callback?: BodyResponseCallback<Schema$BucketAccessControl>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BucketAccessControl>,
       callback?: BodyResponseCallback<Schema$BucketAccessControl>):
       void|AxiosPromise<Schema$BucketAccessControl> {
@@ -710,12 +710,12 @@ export class Resource$Buckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -761,10 +761,10 @@ export class Resource$Buckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Bucket>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Bucket>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Bucket>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
       callback?: BodyResponseCallback<Schema$Bucket>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
       callback?: BodyResponseCallback<Schema$Bucket>):
       void|AxiosPromise<Schema$Bucket> {
     if (typeof options === 'function') {
@@ -811,12 +811,12 @@ export class Resource$Buckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Bucket>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Bucket>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Bucket>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
       callback?: BodyResponseCallback<Schema$Bucket>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
       callback?: BodyResponseCallback<Schema$Bucket>):
       void|AxiosPromise<Schema$Bucket> {
     if (typeof options === 'function') {
@@ -864,12 +864,14 @@ export class Resource$Buckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Buckets>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Buckets>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Buckets>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Buckets>,
       callback?: BodyResponseCallback<Schema$Buckets>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Buckets>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Buckets>,
       callback?: BodyResponseCallback<Schema$Buckets>):
       void|AxiosPromise<Schema$Buckets> {
     if (typeof options === 'function') {
@@ -916,12 +918,12 @@ export class Resource$Buckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Bucket>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Bucket>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Bucket>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
       callback?: BodyResponseCallback<Schema$Bucket>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
       callback?: BodyResponseCallback<Schema$Bucket>):
       void|AxiosPromise<Schema$Bucket> {
     if (typeof options === 'function') {
@@ -969,12 +971,12 @@ export class Resource$Buckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Bucket>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Bucket>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Bucket>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
       callback?: BodyResponseCallback<Schema$Bucket>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
       callback?: BodyResponseCallback<Schema$Bucket>):
       void|AxiosPromise<Schema$Bucket> {
     if (typeof options === 'function') {
@@ -1035,12 +1037,12 @@ export class Resource$Objectaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1089,12 +1091,12 @@ export class Resource$Objectaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$ObjectAccessControl>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>):
       void|AxiosPromise<Schema$ObjectAccessControl> {
@@ -1144,14 +1146,14 @@ export class Resource$Objectaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ObjectAccessControl>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>):
       void|AxiosPromise<Schema$ObjectAccessControl> {
@@ -1199,14 +1201,14 @@ export class Resource$Objectaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ObjectAccessControls>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControls>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControls>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControls>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControls>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControls>):
       void|AxiosPromise<Schema$ObjectAccessControls> {
@@ -1257,14 +1259,14 @@ export class Resource$Objectaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ObjectAccessControl>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>):
       void|AxiosPromise<Schema$ObjectAccessControl> {
@@ -1315,14 +1317,14 @@ export class Resource$Objectaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ObjectAccessControl>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>):
       void|AxiosPromise<Schema$ObjectAccessControl> {
@@ -1383,12 +1385,12 @@ export class Resource$Objects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1435,10 +1437,10 @@ export class Resource$Objects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Object>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Object>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Object>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
       callback?: BodyResponseCallback<Schema$Object>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
       callback?: BodyResponseCallback<Schema$Object>):
       void|AxiosPromise<Schema$Object> {
     if (typeof options === 'function') {
@@ -1490,12 +1492,12 @@ export class Resource$Objects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Object>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Object>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Object>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
       callback?: BodyResponseCallback<Schema$Object>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
       callback?: BodyResponseCallback<Schema$Object>):
       void|AxiosPromise<Schema$Object> {
     if (typeof options === 'function') {
@@ -1548,12 +1550,14 @@ export class Resource$Objects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Objects>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Objects>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Objects>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Objects>,
       callback?: BodyResponseCallback<Schema$Objects>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Objects>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Objects>,
       callback?: BodyResponseCallback<Schema$Objects>):
       void|AxiosPromise<Schema$Objects> {
     if (typeof options === 'function') {
@@ -1603,12 +1607,12 @@ export class Resource$Objects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Object>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Object>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Object>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
       callback?: BodyResponseCallback<Schema$Object>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
       callback?: BodyResponseCallback<Schema$Object>):
       void|AxiosPromise<Schema$Object> {
     if (typeof options === 'function') {
@@ -1657,12 +1661,12 @@ export class Resource$Objects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Object>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Object>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Object>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
       callback?: BodyResponseCallback<Schema$Object>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
       callback?: BodyResponseCallback<Schema$Object>):
       void|AxiosPromise<Schema$Object> {
     if (typeof options === 'function') {
diff --git a/src/apis/storage/v1beta2.ts b/src/apis/storage/v1beta2.ts
index 86ccc8c427..d345063e7d 100644
--- a/src/apis/storage/v1beta2.ts
+++ b/src/apis/storage/v1beta2.ts
@@ -536,12 +536,12 @@ export class Resource$Bucketaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -588,12 +588,12 @@ export class Resource$Bucketaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$BucketAccessControl>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BucketAccessControl>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BucketAccessControl>,
       callback?: BodyResponseCallback<Schema$BucketAccessControl>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BucketAccessControl>,
       callback?: BodyResponseCallback<Schema$BucketAccessControl>):
       void|AxiosPromise<Schema$BucketAccessControl> {
@@ -641,14 +641,14 @@ export class Resource$Bucketaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BucketAccessControl>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BucketAccessControl>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BucketAccessControl>,
       callback?: BodyResponseCallback<Schema$BucketAccessControl>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BucketAccessControl>,
       callback?: BodyResponseCallback<Schema$BucketAccessControl>):
       void|AxiosPromise<Schema$BucketAccessControl> {
@@ -695,14 +695,14 @@ export class Resource$Bucketaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BucketAccessControls>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BucketAccessControls>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BucketAccessControls>,
       callback?: BodyResponseCallback<Schema$BucketAccessControls>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BucketAccessControls>,
       callback?: BodyResponseCallback<Schema$BucketAccessControls>):
       void|AxiosPromise<Schema$BucketAccessControls> {
@@ -752,14 +752,14 @@ export class Resource$Bucketaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BucketAccessControl>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BucketAccessControl>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BucketAccessControl>,
       callback?: BodyResponseCallback<Schema$BucketAccessControl>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BucketAccessControl>,
       callback?: BodyResponseCallback<Schema$BucketAccessControl>):
       void|AxiosPromise<Schema$BucketAccessControl> {
@@ -808,14 +808,14 @@ export class Resource$Bucketaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BucketAccessControl>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$BucketAccessControl>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$BucketAccessControl>,
       callback?: BodyResponseCallback<Schema$BucketAccessControl>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$BucketAccessControl>,
       callback?: BodyResponseCallback<Schema$BucketAccessControl>):
       void|AxiosPromise<Schema$BucketAccessControl> {
@@ -876,12 +876,12 @@ export class Resource$Buckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -929,10 +929,10 @@ export class Resource$Buckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Bucket>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Bucket>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Bucket>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
       callback?: BodyResponseCallback<Schema$Bucket>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
       callback?: BodyResponseCallback<Schema$Bucket>):
       void|AxiosPromise<Schema$Bucket> {
     if (typeof options === 'function') {
@@ -980,12 +980,12 @@ export class Resource$Buckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Bucket>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Bucket>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Bucket>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
       callback?: BodyResponseCallback<Schema$Bucket>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
       callback?: BodyResponseCallback<Schema$Bucket>):
       void|AxiosPromise<Schema$Bucket> {
     if (typeof options === 'function') {
@@ -1033,12 +1033,14 @@ export class Resource$Buckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Buckets>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Buckets>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Buckets>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Buckets>,
       callback?: BodyResponseCallback<Schema$Buckets>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Buckets>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Buckets>,
       callback?: BodyResponseCallback<Schema$Buckets>):
       void|AxiosPromise<Schema$Buckets> {
     if (typeof options === 'function') {
@@ -1087,12 +1089,12 @@ export class Resource$Buckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Bucket>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Bucket>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Bucket>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
       callback?: BodyResponseCallback<Schema$Bucket>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
       callback?: BodyResponseCallback<Schema$Bucket>):
       void|AxiosPromise<Schema$Bucket> {
     if (typeof options === 'function') {
@@ -1142,12 +1144,12 @@ export class Resource$Buckets {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Bucket>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Bucket>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Bucket>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
       callback?: BodyResponseCallback<Schema$Bucket>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Bucket>,
       callback?: BodyResponseCallback<Schema$Bucket>):
       void|AxiosPromise<Schema$Bucket> {
     if (typeof options === 'function') {
@@ -1205,12 +1207,12 @@ export class Resource$Channels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  stop(params: any, options?: MethodOptions): AxiosPromise<void>;
+  stop(params?: any, options?: MethodOptions): AxiosPromise<void>;
   stop(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   stop(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1269,12 +1271,12 @@ export class Resource$Defaultobjectaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1322,12 +1324,12 @@ export class Resource$Defaultobjectaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$ObjectAccessControl>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>):
       void|AxiosPromise<Schema$ObjectAccessControl> {
@@ -1376,14 +1378,14 @@ export class Resource$Defaultobjectaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ObjectAccessControl>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>):
       void|AxiosPromise<Schema$ObjectAccessControl> {
@@ -1432,14 +1434,14 @@ export class Resource$Defaultobjectaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ObjectAccessControls>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControls>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControls>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControls>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControls>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControls>):
       void|AxiosPromise<Schema$ObjectAccessControls> {
@@ -1489,14 +1491,14 @@ export class Resource$Defaultobjectaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ObjectAccessControl>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>):
       void|AxiosPromise<Schema$ObjectAccessControl> {
@@ -1546,14 +1548,14 @@ export class Resource$Defaultobjectaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ObjectAccessControl>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>):
       void|AxiosPromise<Schema$ObjectAccessControl> {
@@ -1617,12 +1619,12 @@ export class Resource$Objectaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1672,12 +1674,12 @@ export class Resource$Objectaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$ObjectAccessControl>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>):
       void|AxiosPromise<Schema$ObjectAccessControl> {
@@ -1728,14 +1730,14 @@ export class Resource$Objectaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ObjectAccessControl>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>):
       void|AxiosPromise<Schema$ObjectAccessControl> {
@@ -1784,14 +1786,14 @@ export class Resource$Objectaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ObjectAccessControls>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControls>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControls>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControls>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControls>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControls>):
       void|AxiosPromise<Schema$ObjectAccessControls> {
@@ -1843,14 +1845,14 @@ export class Resource$Objectaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions):
+  patch(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ObjectAccessControl>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>):
       void|AxiosPromise<Schema$ObjectAccessControl> {
@@ -1902,14 +1904,14 @@ export class Resource$Objectaccesscontrols {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ObjectAccessControl>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ObjectAccessControl>,
       callback?: BodyResponseCallback<Schema$ObjectAccessControl>):
       void|AxiosPromise<Schema$ObjectAccessControl> {
@@ -1974,12 +1976,12 @@ export class Resource$Objects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  compose(params: any, options?: MethodOptions): AxiosPromise<Schema$Object>;
+  compose(params?: any, options?: MethodOptions): AxiosPromise<Schema$Object>;
   compose(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Object>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
       callback?: BodyResponseCallback<Schema$Object>): void;
   compose(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
       callback?: BodyResponseCallback<Schema$Object>):
       void|AxiosPromise<Schema$Object> {
     if (typeof options === 'function') {
@@ -2042,12 +2044,12 @@ export class Resource$Objects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  copy(params: any, options?: MethodOptions): AxiosPromise<Schema$Object>;
+  copy(params?: any, options?: MethodOptions): AxiosPromise<Schema$Object>;
   copy(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Object>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
       callback?: BodyResponseCallback<Schema$Object>): void;
   copy(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
       callback?: BodyResponseCallback<Schema$Object>):
       void|AxiosPromise<Schema$Object> {
     if (typeof options === 'function') {
@@ -2107,12 +2109,12 @@ export class Resource$Objects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2164,10 +2166,10 @@ export class Resource$Objects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Object>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Object>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Object>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
       callback?: BodyResponseCallback<Schema$Object>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
       callback?: BodyResponseCallback<Schema$Object>):
       void|AxiosPromise<Schema$Object> {
     if (typeof options === 'function') {
@@ -2223,12 +2225,12 @@ export class Resource$Objects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Object>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Object>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Object>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
       callback?: BodyResponseCallback<Schema$Object>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
       callback?: BodyResponseCallback<Schema$Object>):
       void|AxiosPromise<Schema$Object> {
     if (typeof options === 'function') {
@@ -2282,12 +2284,14 @@ export class Resource$Objects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Objects>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Objects>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Objects>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Objects>,
       callback?: BodyResponseCallback<Schema$Objects>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Objects>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Objects>,
       callback?: BodyResponseCallback<Schema$Objects>):
       void|AxiosPromise<Schema$Objects> {
     if (typeof options === 'function') {
@@ -2342,12 +2346,12 @@ export class Resource$Objects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Object>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Object>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Object>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
       callback?: BodyResponseCallback<Schema$Object>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
       callback?: BodyResponseCallback<Schema$Object>):
       void|AxiosPromise<Schema$Object> {
     if (typeof options === 'function') {
@@ -2401,12 +2405,12 @@ export class Resource$Objects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Object>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Object>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Object>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
       callback?: BodyResponseCallback<Schema$Object>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Object>,
       callback?: BodyResponseCallback<Schema$Object>):
       void|AxiosPromise<Schema$Object> {
     if (typeof options === 'function') {
@@ -2459,12 +2463,14 @@ export class Resource$Objects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  watchAll(params: any, options?: MethodOptions): AxiosPromise<Schema$Channel>;
+  watchAll(params?: any, options?: MethodOptions): AxiosPromise<Schema$Channel>;
   watchAll(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Channel>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
       callback?: BodyResponseCallback<Schema$Channel>): void;
   watchAll(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
       callback?: BodyResponseCallback<Schema$Channel>):
       void|AxiosPromise<Schema$Channel> {
     if (typeof options === 'function') {
diff --git a/src/apis/storagetransfer/v1.ts b/src/apis/storagetransfer/v1.ts
index 288e165183..5fcbaf3970 100644
--- a/src/apis/storagetransfer/v1.ts
+++ b/src/apis/storagetransfer/v1.ts
@@ -781,12 +781,12 @@ export class Resource$Googleserviceaccounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$GoogleServiceAccount>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GoogleServiceAccount>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GoogleServiceAccount>,
       callback?: BodyResponseCallback<Schema$GoogleServiceAccount>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GoogleServiceAccount>,
       callback?: BodyResponseCallback<Schema$GoogleServiceAccount>):
       void|AxiosPromise<Schema$GoogleServiceAccount> {
@@ -899,14 +899,14 @@ export class Resource$Transferjobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TransferJob>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TransferJob>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TransferJob>,
       callback?: BodyResponseCallback<Schema$TransferJob>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TransferJob>,
       callback?: BodyResponseCallback<Schema$TransferJob>):
       void|AxiosPromise<Schema$TransferJob> {
@@ -1008,11 +1008,11 @@ export class Resource$Transferjobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$TransferJob>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TransferJob>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$TransferJob>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TransferJob>,
       callback?: BodyResponseCallback<Schema$TransferJob>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TransferJob>,
       callback?: BodyResponseCallback<Schema$TransferJob>):
       void|AxiosPromise<Schema$TransferJob> {
@@ -1124,15 +1124,15 @@ export class Resource$Transferjobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListTransferJobsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListTransferJobsResponse>,
       callback?: BodyResponseCallback<Schema$ListTransferJobsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListTransferJobsResponse>,
       callback?: BodyResponseCallback<Schema$ListTransferJobsResponse>):
@@ -1243,13 +1243,14 @@ export class Resource$Transferjobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$TransferJob>;
+  patch(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$TransferJob>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TransferJob>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TransferJob>,
       callback?: BodyResponseCallback<Schema$TransferJob>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TransferJob>,
       callback?: BodyResponseCallback<Schema$TransferJob>):
       void|AxiosPromise<Schema$TransferJob> {
@@ -1360,12 +1361,12 @@ export class Resource$Transferoperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancel(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  cancel(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   cancel(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   cancel(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1461,12 +1462,12 @@ export class Resource$Transferoperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1567,11 +1568,11 @@ export class Resource$Transferoperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1694,15 +1695,15 @@ export class Resource$Transferoperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListOperationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>):
@@ -1806,12 +1807,12 @@ export class Resource$Transferoperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  pause(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  pause(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   pause(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   pause(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1913,12 +1914,12 @@ export class Resource$Transferoperations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resume(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  resume(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   resume(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   resume(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
diff --git a/src/apis/streetviewpublish/v1.ts b/src/apis/streetviewpublish/v1.ts
index 20f614c0c2..4c367334a5 100644
--- a/src/apis/streetviewpublish/v1.ts
+++ b/src/apis/streetviewpublish/v1.ts
@@ -470,12 +470,12 @@ export class Resource$Photo {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Photo>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Photo>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Photo>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Photo>,
       callback?: BodyResponseCallback<Schema$Photo>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Photo>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Photo>,
       callback?: BodyResponseCallback<Schema$Photo>):
       void|AxiosPromise<Schema$Photo> {
     if (typeof options === 'function') {
@@ -524,12 +524,12 @@ export class Resource$Photo {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -581,10 +581,10 @@ export class Resource$Photo {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Photo>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Photo>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Photo>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Photo>,
       callback?: BodyResponseCallback<Schema$Photo>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Photo>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Photo>,
       callback?: BodyResponseCallback<Schema$Photo>):
       void|AxiosPromise<Schema$Photo> {
     if (typeof options === 'function') {
@@ -642,14 +642,14 @@ export class Resource$Photo {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  startUpload(params: any, options?: MethodOptions):
+  startUpload(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$UploadRef>;
   startUpload(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UploadRef>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UploadRef>,
       callback?: BodyResponseCallback<Schema$UploadRef>): void;
   startUpload(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UploadRef>,
       callback?: BodyResponseCallback<Schema$UploadRef>):
       void|AxiosPromise<Schema$UploadRef> {
@@ -709,12 +709,12 @@ export class Resource$Photo {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Photo>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Photo>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Photo>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Photo>,
       callback?: BodyResponseCallback<Schema$Photo>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Photo>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Photo>,
       callback?: BodyResponseCallback<Schema$Photo>):
       void|AxiosPromise<Schema$Photo> {
     if (typeof options === 'function') {
@@ -778,15 +778,15 @@ export class Resource$Photos {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchDelete(params: any, options?: MethodOptions):
+  batchDelete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BatchDeletePhotosResponse>;
   batchDelete(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$BatchDeletePhotosResponse>,
       callback?: BodyResponseCallback<Schema$BatchDeletePhotosResponse>): void;
   batchDelete(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$BatchDeletePhotosResponse>,
       callback?: BodyResponseCallback<Schema$BatchDeletePhotosResponse>):
@@ -841,15 +841,15 @@ export class Resource$Photos {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchGet(params: any, options?: MethodOptions):
+  batchGet(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BatchGetPhotosResponse>;
   batchGet(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$BatchGetPhotosResponse>,
       callback?: BodyResponseCallback<Schema$BatchGetPhotosResponse>): void;
   batchGet(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$BatchGetPhotosResponse>,
       callback?: BodyResponseCallback<Schema$BatchGetPhotosResponse>):
@@ -908,15 +908,15 @@ export class Resource$Photos {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchUpdate(params: any, options?: MethodOptions):
+  batchUpdate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BatchUpdatePhotosResponse>;
   batchUpdate(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$BatchUpdatePhotosResponse>,
       callback?: BodyResponseCallback<Schema$BatchUpdatePhotosResponse>): void;
   batchUpdate(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$BatchUpdatePhotosResponse>,
       callback?: BodyResponseCallback<Schema$BatchUpdatePhotosResponse>):
@@ -970,14 +970,14 @@ export class Resource$Photos {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListPhotosResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListPhotosResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListPhotosResponse>,
       callback?: BodyResponseCallback<Schema$ListPhotosResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListPhotosResponse>,
       callback?: BodyResponseCallback<Schema$ListPhotosResponse>):
       void|AxiosPromise<Schema$ListPhotosResponse> {
diff --git a/src/apis/surveys/v2.ts b/src/apis/surveys/v2.ts
index d7a4ba3b2c..1a38862593 100644
--- a/src/apis/surveys/v2.ts
+++ b/src/apis/surveys/v2.ts
@@ -479,12 +479,12 @@ export class Resource$Mobileapppanels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$MobileAppPanel>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$MobileAppPanel>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$MobileAppPanel>,
       callback?: BodyResponseCallback<Schema$MobileAppPanel>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$MobileAppPanel>,
       callback?: BodyResponseCallback<Schema$MobileAppPanel>):
       void|AxiosPromise<Schema$MobileAppPanel> {
@@ -533,16 +533,16 @@ export class Resource$Mobileapppanels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$MobileAppPanelsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$MobileAppPanelsListResponse>,
       callback?: BodyResponseCallback<Schema$MobileAppPanelsListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$MobileAppPanelsListResponse>,
       callback?: BodyResponseCallback<Schema$MobileAppPanelsListResponse>):
@@ -593,14 +593,14 @@ export class Resource$Mobileapppanels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$MobileAppPanel>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$MobileAppPanel>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$MobileAppPanel>,
       callback?: BodyResponseCallback<Schema$MobileAppPanel>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$MobileAppPanel>,
       callback?: BodyResponseCallback<Schema$MobileAppPanel>):
       void|AxiosPromise<Schema$MobileAppPanel> {
@@ -662,11 +662,12 @@ export class Resource$Results {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$SurveyResults>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SurveyResults>,
+  get(params?: any,
+      options?: MethodOptions): AxiosPromise<Schema$SurveyResults>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SurveyResults>,
       callback?: BodyResponseCallback<Schema$SurveyResults>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SurveyResults>,
       callback?: BodyResponseCallback<Schema$SurveyResults>):
       void|AxiosPromise<Schema$SurveyResults> {
@@ -725,14 +726,15 @@ export class Resource$Surveys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions):
+  delete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SurveysDeleteResponse>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SurveysDeleteResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$SurveysDeleteResponse>,
       callback?: BodyResponseCallback<Schema$SurveysDeleteResponse>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SurveysDeleteResponse>,
       callback?: BodyResponseCallback<Schema$SurveysDeleteResponse>):
@@ -780,10 +782,10 @@ export class Resource$Surveys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Survey>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Survey>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Survey>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Survey>,
       callback?: BodyResponseCallback<Schema$Survey>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Survey>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Survey>,
       callback?: BodyResponseCallback<Schema$Survey>):
       void|AxiosPromise<Schema$Survey> {
     if (typeof options === 'function') {
@@ -829,12 +831,12 @@ export class Resource$Surveys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Survey>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Survey>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Survey>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Survey>,
       callback?: BodyResponseCallback<Schema$Survey>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Survey>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Survey>,
       callback?: BodyResponseCallback<Schema$Survey>):
       void|AxiosPromise<Schema$Survey> {
     if (typeof options === 'function') {
@@ -882,14 +884,14 @@ export class Resource$Surveys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SurveysListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SurveysListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SurveysListResponse>,
       callback?: BodyResponseCallback<Schema$SurveysListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SurveysListResponse>,
       callback?: BodyResponseCallback<Schema$SurveysListResponse>):
       void|AxiosPromise<Schema$SurveysListResponse> {
@@ -937,14 +939,14 @@ export class Resource$Surveys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  start(params: any, options?: MethodOptions):
+  start(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SurveysStartResponse>;
   start(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SurveysStartResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SurveysStartResponse>,
       callback?: BodyResponseCallback<Schema$SurveysStartResponse>): void;
   start(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SurveysStartResponse>,
       callback?: BodyResponseCallback<Schema$SurveysStartResponse>):
       void|AxiosPromise<Schema$SurveysStartResponse> {
@@ -991,14 +993,14 @@ export class Resource$Surveys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  stop(params: any, options?: MethodOptions):
+  stop(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SurveysStopResponse>;
   stop(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SurveysStopResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SurveysStopResponse>,
       callback?: BodyResponseCallback<Schema$SurveysStopResponse>): void;
   stop(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SurveysStopResponse>,
       callback?: BodyResponseCallback<Schema$SurveysStopResponse>):
       void|AxiosPromise<Schema$SurveysStopResponse> {
@@ -1047,12 +1049,12 @@ export class Resource$Surveys {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Survey>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Survey>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Survey>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Survey>,
       callback?: BodyResponseCallback<Schema$Survey>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Survey>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Survey>,
       callback?: BodyResponseCallback<Schema$Survey>):
       void|AxiosPromise<Schema$Survey> {
     if (typeof options === 'function') {
diff --git a/src/apis/tagmanager/v1.ts b/src/apis/tagmanager/v1.ts
index c3e60ec54f..c7cb546306 100644
--- a/src/apis/tagmanager/v1.ts
+++ b/src/apis/tagmanager/v1.ts
@@ -1030,10 +1030,12 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Account>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Account>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>):
       void|AxiosPromise<Schema$Account> {
     if (typeof options === 'function') {
@@ -1078,14 +1080,14 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListAccountsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListAccountsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListAccountsResponse>,
       callback?: BodyResponseCallback<Schema$ListAccountsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListAccountsResponse>,
       callback?: BodyResponseCallback<Schema$ListAccountsResponse>):
       void|AxiosPromise<Schema$ListAccountsResponse> {
@@ -1134,12 +1136,14 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Account>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Account>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>):
       void|AxiosPromise<Schema$Account> {
     if (typeof options === 'function') {
@@ -1215,13 +1219,13 @@ export class Resource$Accounts$Containers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Container>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Container>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Container>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Container>,
       callback?: BodyResponseCallback<Schema$Container>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Container>,
       callback?: BodyResponseCallback<Schema$Container>):
       void|AxiosPromise<Schema$Container> {
@@ -1269,12 +1273,12 @@ export class Resource$Accounts$Containers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1322,11 +1326,11 @@ export class Resource$Accounts$Containers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Container>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Container>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Container>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Container>,
       callback?: BodyResponseCallback<Schema$Container>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Container>,
       callback?: BodyResponseCallback<Schema$Container>):
       void|AxiosPromise<Schema$Container> {
@@ -1375,15 +1379,15 @@ export class Resource$Accounts$Containers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListContainersResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListContainersResponse>,
       callback?: BodyResponseCallback<Schema$ListContainersResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListContainersResponse>,
       callback?: BodyResponseCallback<Schema$ListContainersResponse>):
@@ -1434,13 +1438,13 @@ export class Resource$Accounts$Containers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Container>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Container>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Container>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Container>,
       callback?: BodyResponseCallback<Schema$Container>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Container>,
       callback?: BodyResponseCallback<Schema$Container>):
       void|AxiosPromise<Schema$Container> {
@@ -1502,14 +1506,14 @@ export class Resource$Accounts$Containers$Environments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Environment>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Environment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Environment>,
       callback?: BodyResponseCallback<Schema$Environment>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Environment>,
       callback?: BodyResponseCallback<Schema$Environment>):
       void|AxiosPromise<Schema$Environment> {
@@ -1560,12 +1564,12 @@ export class Resource$Accounts$Containers$Environments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1614,11 +1618,11 @@ export class Resource$Accounts$Containers$Environments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Environment>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Environment>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Environment>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Environment>,
       callback?: BodyResponseCallback<Schema$Environment>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Environment>,
       callback?: BodyResponseCallback<Schema$Environment>):
       void|AxiosPromise<Schema$Environment> {
@@ -1668,15 +1672,15 @@ export class Resource$Accounts$Containers$Environments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListEnvironmentsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListEnvironmentsResponse>,
       callback?: BodyResponseCallback<Schema$ListEnvironmentsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListEnvironmentsResponse>,
       callback?: BodyResponseCallback<Schema$ListEnvironmentsResponse>):
@@ -1730,13 +1734,14 @@ export class Resource$Accounts$Containers$Environments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Environment>;
+  patch(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Environment>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Environment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Environment>,
       callback?: BodyResponseCallback<Schema$Environment>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Environment>,
       callback?: BodyResponseCallback<Schema$Environment>):
       void|AxiosPromise<Schema$Environment> {
@@ -1789,14 +1794,14 @@ export class Resource$Accounts$Containers$Environments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Environment>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Environment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Environment>,
       callback?: BodyResponseCallback<Schema$Environment>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Environment>,
       callback?: BodyResponseCallback<Schema$Environment>):
       void|AxiosPromise<Schema$Environment> {
@@ -1861,12 +1866,12 @@ export class Resource$Accounts$Containers$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Folder>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Folder>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Folder>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
       callback?: BodyResponseCallback<Schema$Folder>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
       callback?: BodyResponseCallback<Schema$Folder>):
       void|AxiosPromise<Schema$Folder> {
     if (typeof options === 'function') {
@@ -1916,12 +1921,12 @@ export class Resource$Accounts$Containers$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1970,10 +1975,10 @@ export class Resource$Accounts$Containers$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Folder>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Folder>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Folder>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
       callback?: BodyResponseCallback<Schema$Folder>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
       callback?: BodyResponseCallback<Schema$Folder>):
       void|AxiosPromise<Schema$Folder> {
     if (typeof options === 'function') {
@@ -2022,14 +2027,14 @@ export class Resource$Accounts$Containers$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListFoldersResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListFoldersResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListFoldersResponse>,
       callback?: BodyResponseCallback<Schema$ListFoldersResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListFoldersResponse>,
       callback?: BodyResponseCallback<Schema$ListFoldersResponse>):
       void|AxiosPromise<Schema$ListFoldersResponse> {
@@ -2082,12 +2087,12 @@ export class Resource$Accounts$Containers$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Folder>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Folder>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Folder>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
       callback?: BodyResponseCallback<Schema$Folder>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
       callback?: BodyResponseCallback<Schema$Folder>):
       void|AxiosPromise<Schema$Folder> {
     if (typeof options === 'function') {
@@ -2148,14 +2153,14 @@ export class Resource$Accounts$Containers$Folders$Entities {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FolderEntities>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$FolderEntities>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$FolderEntities>,
       callback?: BodyResponseCallback<Schema$FolderEntities>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$FolderEntities>,
       callback?: BodyResponseCallback<Schema$FolderEntities>):
       void|AxiosPromise<Schema$FolderEntities> {
@@ -2223,12 +2228,12 @@ export class Resource$Accounts$Containers$Move_folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<void>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<void>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2290,14 +2295,14 @@ export class Resource$Accounts$Containers$Reauthorize_environments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Environment>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Environment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Environment>,
       callback?: BodyResponseCallback<Schema$Environment>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Environment>,
       callback?: BodyResponseCallback<Schema$Environment>):
       void|AxiosPromise<Schema$Environment> {
@@ -2360,12 +2365,12 @@ export class Resource$Accounts$Containers$Tags {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Tag>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Tag>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Tag>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Tag>,
       callback?: BodyResponseCallback<Schema$Tag>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Tag>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Tag>,
       callback?: BodyResponseCallback<Schema$Tag>):
       void|AxiosPromise<Schema$Tag> {
     if (typeof options === 'function') {
@@ -2415,12 +2420,12 @@ export class Resource$Accounts$Containers$Tags {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2469,10 +2474,10 @@ export class Resource$Accounts$Containers$Tags {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Tag>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Tag>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Tag>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Tag>,
       callback?: BodyResponseCallback<Schema$Tag>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Tag>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Tag>,
       callback?: BodyResponseCallback<Schema$Tag>):
       void|AxiosPromise<Schema$Tag> {
     if (typeof options === 'function') {
@@ -2521,14 +2526,14 @@ export class Resource$Accounts$Containers$Tags {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListTagsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListTagsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListTagsResponse>,
       callback?: BodyResponseCallback<Schema$ListTagsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListTagsResponse>,
       callback?: BodyResponseCallback<Schema$ListTagsResponse>):
       void|AxiosPromise<Schema$ListTagsResponse> {
@@ -2581,12 +2586,12 @@ export class Resource$Accounts$Containers$Tags {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Tag>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Tag>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Tag>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Tag>,
       callback?: BodyResponseCallback<Schema$Tag>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Tag>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Tag>,
       callback?: BodyResponseCallback<Schema$Tag>):
       void|AxiosPromise<Schema$Tag> {
     if (typeof options === 'function') {
@@ -2648,12 +2653,14 @@ export class Resource$Accounts$Containers$Triggers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Trigger>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Trigger>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Trigger>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Trigger>,
       callback?: BodyResponseCallback<Schema$Trigger>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Trigger>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Trigger>,
       callback?: BodyResponseCallback<Schema$Trigger>):
       void|AxiosPromise<Schema$Trigger> {
     if (typeof options === 'function') {
@@ -2703,12 +2710,12 @@ export class Resource$Accounts$Containers$Triggers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2757,10 +2764,12 @@ export class Resource$Accounts$Containers$Triggers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Trigger>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Trigger>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Trigger>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Trigger>,
       callback?: BodyResponseCallback<Schema$Trigger>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Trigger>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Trigger>,
       callback?: BodyResponseCallback<Schema$Trigger>):
       void|AxiosPromise<Schema$Trigger> {
     if (typeof options === 'function') {
@@ -2809,14 +2818,14 @@ export class Resource$Accounts$Containers$Triggers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListTriggersResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListTriggersResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListTriggersResponse>,
       callback?: BodyResponseCallback<Schema$ListTriggersResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListTriggersResponse>,
       callback?: BodyResponseCallback<Schema$ListTriggersResponse>):
       void|AxiosPromise<Schema$ListTriggersResponse> {
@@ -2869,12 +2878,14 @@ export class Resource$Accounts$Containers$Triggers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Trigger>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Trigger>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Trigger>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Trigger>,
       callback?: BodyResponseCallback<Schema$Trigger>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Trigger>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Trigger>,
       callback?: BodyResponseCallback<Schema$Trigger>):
       void|AxiosPromise<Schema$Trigger> {
     if (typeof options === 'function') {
@@ -2936,12 +2947,13 @@ export class Resource$Accounts$Containers$Variables {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Variable>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Variable>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Variable>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Variable>,
       callback?: BodyResponseCallback<Schema$Variable>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Variable>,
       callback?: BodyResponseCallback<Schema$Variable>):
       void|AxiosPromise<Schema$Variable> {
@@ -2992,12 +3004,12 @@ export class Resource$Accounts$Containers$Variables {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -3046,10 +3058,11 @@ export class Resource$Accounts$Containers$Variables {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Variable>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Variable>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Variable>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Variable>,
       callback?: BodyResponseCallback<Schema$Variable>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Variable>,
       callback?: BodyResponseCallback<Schema$Variable>):
       void|AxiosPromise<Schema$Variable> {
@@ -3099,14 +3112,15 @@ export class Resource$Accounts$Containers$Variables {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListVariablesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListVariablesResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ListVariablesResponse>,
       callback?: BodyResponseCallback<Schema$ListVariablesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListVariablesResponse>,
       callback?: BodyResponseCallback<Schema$ListVariablesResponse>):
@@ -3160,12 +3174,13 @@ export class Resource$Accounts$Containers$Variables {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Variable>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Variable>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Variable>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Variable>,
       callback?: BodyResponseCallback<Schema$Variable>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Variable>,
       callback?: BodyResponseCallback<Schema$Variable>):
       void|AxiosPromise<Schema$Variable> {
@@ -3228,16 +3243,16 @@ export class Resource$Accounts$Containers$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreateContainerVersionResponse>;
   create(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$CreateContainerVersionResponse>,
       callback?: BodyResponseCallback<Schema$CreateContainerVersionResponse>):
       void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$CreateContainerVersionResponse>,
       callback?: BodyResponseCallback<Schema$CreateContainerVersionResponse>):
@@ -3291,12 +3306,12 @@ export class Resource$Accounts$Containers$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -3345,12 +3360,12 @@ export class Resource$Accounts$Containers$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$ContainerVersion>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ContainerVersion>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ContainerVersion>,
       callback?: BodyResponseCallback<Schema$ContainerVersion>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ContainerVersion>,
       callback?: BodyResponseCallback<Schema$ContainerVersion>):
       void|AxiosPromise<Schema$ContainerVersion> {
@@ -3402,16 +3417,16 @@ export class Resource$Accounts$Containers$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListContainerVersionsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListContainerVersionsResponse>,
       callback?: BodyResponseCallback<Schema$ListContainerVersionsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListContainerVersionsResponse>,
       callback?: BodyResponseCallback<Schema$ListContainerVersionsResponse>):
@@ -3465,16 +3480,16 @@ export class Resource$Accounts$Containers$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  publish(params: any, options?: MethodOptions):
+  publish(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PublishContainerVersionResponse>;
   publish(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$PublishContainerVersionResponse>,
       callback?: BodyResponseCallback<Schema$PublishContainerVersionResponse>):
       void;
   publish(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$PublishContainerVersionResponse>,
       callback?: BodyResponseCallback<Schema$PublishContainerVersionResponse>):
@@ -3531,14 +3546,14 @@ export class Resource$Accounts$Containers$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  restore(params: any, options?: MethodOptions):
+  restore(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ContainerVersion>;
   restore(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ContainerVersion>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ContainerVersion>,
       callback?: BodyResponseCallback<Schema$ContainerVersion>): void;
   restore(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ContainerVersion>,
       callback?: BodyResponseCallback<Schema$ContainerVersion>):
       void|AxiosPromise<Schema$ContainerVersion> {
@@ -3589,14 +3604,14 @@ export class Resource$Accounts$Containers$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  undelete(params: any, options?: MethodOptions):
+  undelete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ContainerVersion>;
   undelete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ContainerVersion>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ContainerVersion>,
       callback?: BodyResponseCallback<Schema$ContainerVersion>): void;
   undelete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ContainerVersion>,
       callback?: BodyResponseCallback<Schema$ContainerVersion>):
       void|AxiosPromise<Schema$ContainerVersion> {
@@ -3649,14 +3664,14 @@ export class Resource$Accounts$Containers$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ContainerVersion>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ContainerVersion>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ContainerVersion>,
       callback?: BodyResponseCallback<Schema$ContainerVersion>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ContainerVersion>,
       callback?: BodyResponseCallback<Schema$ContainerVersion>):
       void|AxiosPromise<Schema$ContainerVersion> {
@@ -3719,13 +3734,14 @@ export class Resource$Accounts$Permissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$UserAccess>;
+  create(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$UserAccess>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UserAccess>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UserAccess>,
       callback?: BodyResponseCallback<Schema$UserAccess>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UserAccess>,
       callback?: BodyResponseCallback<Schema$UserAccess>):
       void|AxiosPromise<Schema$UserAccess> {
@@ -3774,12 +3790,12 @@ export class Resource$Accounts$Permissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -3827,11 +3843,11 @@ export class Resource$Accounts$Permissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$UserAccess>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UserAccess>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$UserAccess>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UserAccess>,
       callback?: BodyResponseCallback<Schema$UserAccess>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UserAccess>,
       callback?: BodyResponseCallback<Schema$UserAccess>):
       void|AxiosPromise<Schema$UserAccess> {
@@ -3881,15 +3897,15 @@ export class Resource$Accounts$Permissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListAccountUsersResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListAccountUsersResponse>,
       callback?: BodyResponseCallback<Schema$ListAccountUsersResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListAccountUsersResponse>,
       callback?: BodyResponseCallback<Schema$ListAccountUsersResponse>):
@@ -3939,13 +3955,14 @@ export class Resource$Accounts$Permissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$UserAccess>;
+  update(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$UserAccess>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UserAccess>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UserAccess>,
       callback?: BodyResponseCallback<Schema$UserAccess>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UserAccess>,
       callback?: BodyResponseCallback<Schema$UserAccess>):
       void|AxiosPromise<Schema$UserAccess> {
diff --git a/src/apis/tagmanager/v2.ts b/src/apis/tagmanager/v2.ts
index e7c5a022fa..2d451c9da7 100644
--- a/src/apis/tagmanager/v2.ts
+++ b/src/apis/tagmanager/v2.ts
@@ -1613,10 +1613,12 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Account>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Account>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>):
       void|AxiosPromise<Schema$Account> {
     if (typeof options === 'function') {
@@ -1662,14 +1664,14 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListAccountsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListAccountsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListAccountsResponse>,
       callback?: BodyResponseCallback<Schema$ListAccountsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListAccountsResponse>,
       callback?: BodyResponseCallback<Schema$ListAccountsResponse>):
       void|AxiosPromise<Schema$ListAccountsResponse> {
@@ -1718,12 +1720,14 @@ export class Resource$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Account>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Account>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Account>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Account>,
       callback?: BodyResponseCallback<Schema$Account>):
       void|AxiosPromise<Schema$Account> {
     if (typeof options === 'function') {
@@ -1790,13 +1794,13 @@ export class Resource$Accounts$Containers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Container>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Container>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Container>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Container>,
       callback?: BodyResponseCallback<Schema$Container>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Container>,
       callback?: BodyResponseCallback<Schema$Container>):
       void|AxiosPromise<Schema$Container> {
@@ -1843,12 +1847,12 @@ export class Resource$Accounts$Containers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -1893,11 +1897,11 @@ export class Resource$Accounts$Containers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Container>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Container>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Container>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Container>,
       callback?: BodyResponseCallback<Schema$Container>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Container>,
       callback?: BodyResponseCallback<Schema$Container>):
       void|AxiosPromise<Schema$Container> {
@@ -1945,15 +1949,15 @@ export class Resource$Accounts$Containers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListContainersResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListContainersResponse>,
       callback?: BodyResponseCallback<Schema$ListContainersResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListContainersResponse>,
       callback?: BodyResponseCallback<Schema$ListContainersResponse>):
@@ -2003,13 +2007,13 @@ export class Resource$Accounts$Containers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Container>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Container>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Container>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Container>,
       callback?: BodyResponseCallback<Schema$Container>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Container>,
       callback?: BodyResponseCallback<Schema$Container>):
       void|AxiosPromise<Schema$Container> {
@@ -2068,14 +2072,14 @@ export class Resource$Accounts$Containers$Environments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Environment>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Environment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Environment>,
       callback?: BodyResponseCallback<Schema$Environment>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Environment>,
       callback?: BodyResponseCallback<Schema$Environment>):
       void|AxiosPromise<Schema$Environment> {
@@ -2122,12 +2126,12 @@ export class Resource$Accounts$Containers$Environments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2172,11 +2176,11 @@ export class Resource$Accounts$Containers$Environments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Environment>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Environment>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Environment>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Environment>,
       callback?: BodyResponseCallback<Schema$Environment>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Environment>,
       callback?: BodyResponseCallback<Schema$Environment>):
       void|AxiosPromise<Schema$Environment> {
@@ -2224,15 +2228,15 @@ export class Resource$Accounts$Containers$Environments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListEnvironmentsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListEnvironmentsResponse>,
       callback?: BodyResponseCallback<Schema$ListEnvironmentsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListEnvironmentsResponse>,
       callback?: BodyResponseCallback<Schema$ListEnvironmentsResponse>):
@@ -2282,13 +2286,14 @@ export class Resource$Accounts$Containers$Environments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Environment>;
+  patch(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Environment>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Environment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Environment>,
       callback?: BodyResponseCallback<Schema$Environment>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Environment>,
       callback?: BodyResponseCallback<Schema$Environment>):
       void|AxiosPromise<Schema$Environment> {
@@ -2336,14 +2341,14 @@ export class Resource$Accounts$Containers$Environments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  reauthorize(params: any, options?: MethodOptions):
+  reauthorize(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Environment>;
   reauthorize(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Environment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Environment>,
       callback?: BodyResponseCallback<Schema$Environment>): void;
   reauthorize(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Environment>,
       callback?: BodyResponseCallback<Schema$Environment>):
       void|AxiosPromise<Schema$Environment> {
@@ -2392,14 +2397,14 @@ export class Resource$Accounts$Containers$Environments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Environment>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Environment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Environment>,
       callback?: BodyResponseCallback<Schema$Environment>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Environment>,
       callback?: BodyResponseCallback<Schema$Environment>):
       void|AxiosPromise<Schema$Environment> {
@@ -2458,12 +2463,12 @@ export class Resource$Accounts$Containers$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -2509,12 +2514,12 @@ export class Resource$Accounts$Containers$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$ContainerVersion>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ContainerVersion>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ContainerVersion>,
       callback?: BodyResponseCallback<Schema$ContainerVersion>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ContainerVersion>,
       callback?: BodyResponseCallback<Schema$ContainerVersion>):
       void|AxiosPromise<Schema$ContainerVersion> {
@@ -2561,14 +2566,14 @@ export class Resource$Accounts$Containers$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  live(params: any, options?: MethodOptions):
+  live(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ContainerVersion>;
   live(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ContainerVersion>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ContainerVersion>,
       callback?: BodyResponseCallback<Schema$ContainerVersion>): void;
   live(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ContainerVersion>,
       callback?: BodyResponseCallback<Schema$ContainerVersion>):
       void|AxiosPromise<Schema$ContainerVersion> {
@@ -2616,16 +2621,16 @@ export class Resource$Accounts$Containers$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  publish(params: any, options?: MethodOptions):
+  publish(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PublishContainerVersionResponse>;
   publish(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$PublishContainerVersionResponse>,
       callback?: BodyResponseCallback<Schema$PublishContainerVersionResponse>):
       void;
   publish(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$PublishContainerVersionResponse>,
       callback?: BodyResponseCallback<Schema$PublishContainerVersionResponse>):
@@ -2676,14 +2681,14 @@ export class Resource$Accounts$Containers$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  set_latest(params: any, options?: MethodOptions):
+  set_latest(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ContainerVersion>;
   set_latest(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ContainerVersion>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ContainerVersion>,
       callback?: BodyResponseCallback<Schema$ContainerVersion>): void;
   set_latest(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ContainerVersion>,
       callback?: BodyResponseCallback<Schema$ContainerVersion>):
       void|AxiosPromise<Schema$ContainerVersion> {
@@ -2730,14 +2735,14 @@ export class Resource$Accounts$Containers$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  undelete(params: any, options?: MethodOptions):
+  undelete(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ContainerVersion>;
   undelete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ContainerVersion>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ContainerVersion>,
       callback?: BodyResponseCallback<Schema$ContainerVersion>): void;
   undelete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ContainerVersion>,
       callback?: BodyResponseCallback<Schema$ContainerVersion>):
       void|AxiosPromise<Schema$ContainerVersion> {
@@ -2786,14 +2791,14 @@ export class Resource$Accounts$Containers$Versions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ContainerVersion>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ContainerVersion>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ContainerVersion>,
       callback?: BodyResponseCallback<Schema$ContainerVersion>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ContainerVersion>,
       callback?: BodyResponseCallback<Schema$ContainerVersion>):
       void|AxiosPromise<Schema$ContainerVersion> {
@@ -2852,15 +2857,15 @@ export class Resource$Accounts$Containers$Version_headers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  latest(params: any, options?: MethodOptions):
+  latest(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ContainerVersionHeader>;
   latest(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ContainerVersionHeader>,
       callback?: BodyResponseCallback<Schema$ContainerVersionHeader>): void;
   latest(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ContainerVersionHeader>,
       callback?: BodyResponseCallback<Schema$ContainerVersionHeader>):
@@ -2910,16 +2915,16 @@ export class Resource$Accounts$Containers$Version_headers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListContainerVersionsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListContainerVersionsResponse>,
       callback?: BodyResponseCallback<Schema$ListContainerVersionsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListContainerVersionsResponse>,
       callback?: BodyResponseCallback<Schema$ListContainerVersionsResponse>):
@@ -2996,13 +3001,13 @@ export class Resource$Accounts$Containers$Workspaces {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Workspace>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Workspace>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Workspace>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Workspace>,
       callback?: BodyResponseCallback<Schema$Workspace>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Workspace>,
       callback?: BodyResponseCallback<Schema$Workspace>):
       void|AxiosPromise<Schema$Workspace> {
@@ -3052,16 +3057,16 @@ export class Resource$Accounts$Containers$Workspaces {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create_version(params: any, options?: MethodOptions):
+  create_version(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreateContainerVersionResponse>;
   create_version(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$CreateContainerVersionResponse>,
       callback?: BodyResponseCallback<Schema$CreateContainerVersionResponse>):
       void;
   create_version(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$CreateContainerVersionResponse>,
       callback?: BodyResponseCallback<Schema$CreateContainerVersionResponse>):
@@ -3111,12 +3116,12 @@ export class Resource$Accounts$Containers$Workspaces {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -3161,11 +3166,11 @@ export class Resource$Accounts$Containers$Workspaces {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Workspace>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Workspace>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Workspace>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Workspace>,
       callback?: BodyResponseCallback<Schema$Workspace>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Workspace>,
       callback?: BodyResponseCallback<Schema$Workspace>):
       void|AxiosPromise<Schema$Workspace> {
@@ -3212,14 +3217,14 @@ export class Resource$Accounts$Containers$Workspaces {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getProposal(params: any, options?: MethodOptions):
+  getProposal(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$WorkspaceProposal>;
   getProposal(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$WorkspaceProposal>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$WorkspaceProposal>,
       callback?: BodyResponseCallback<Schema$WorkspaceProposal>): void;
   getProposal(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$WorkspaceProposal>,
       callback?: BodyResponseCallback<Schema$WorkspaceProposal>):
       void|AxiosPromise<Schema$WorkspaceProposal> {
@@ -3266,15 +3271,15 @@ export class Resource$Accounts$Containers$Workspaces {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getStatus(params: any, options?: MethodOptions):
+  getStatus(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GetWorkspaceStatusResponse>;
   getStatus(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GetWorkspaceStatusResponse>,
       callback?: BodyResponseCallback<Schema$GetWorkspaceStatusResponse>): void;
   getStatus(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GetWorkspaceStatusResponse>,
       callback?: BodyResponseCallback<Schema$GetWorkspaceStatusResponse>):
@@ -3323,15 +3328,15 @@ export class Resource$Accounts$Containers$Workspaces {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListWorkspacesResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListWorkspacesResponse>,
       callback?: BodyResponseCallback<Schema$ListWorkspacesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListWorkspacesResponse>,
       callback?: BodyResponseCallback<Schema$ListWorkspacesResponse>):
@@ -3380,14 +3385,14 @@ export class Resource$Accounts$Containers$Workspaces {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  quick_preview(params: any, options?: MethodOptions):
+  quick_preview(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$QuickPreviewResponse>;
   quick_preview(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$QuickPreviewResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$QuickPreviewResponse>,
       callback?: BodyResponseCallback<Schema$QuickPreviewResponse>): void;
   quick_preview(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$QuickPreviewResponse>,
       callback?: BodyResponseCallback<Schema$QuickPreviewResponse>):
       void|AxiosPromise<Schema$QuickPreviewResponse> {
@@ -3437,12 +3442,12 @@ export class Resource$Accounts$Containers$Workspaces {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  resolve_conflict(params: any, options?: MethodOptions): AxiosPromise<void>;
+  resolve_conflict(params?: any, options?: MethodOptions): AxiosPromise<void>;
   resolve_conflict(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   resolve_conflict(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -3489,14 +3494,15 @@ export class Resource$Accounts$Containers$Workspaces {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  sync(params: any, options?: MethodOptions):
+  sync(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SyncWorkspaceResponse>;
   sync(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SyncWorkspaceResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$SyncWorkspaceResponse>,
       callback?: BodyResponseCallback<Schema$SyncWorkspaceResponse>): void;
   sync(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SyncWorkspaceResponse>,
       callback?: BodyResponseCallback<Schema$SyncWorkspaceResponse>):
@@ -3546,13 +3552,13 @@ export class Resource$Accounts$Containers$Workspaces {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Workspace>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Workspace>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Workspace>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Workspace>,
       callback?: BodyResponseCallback<Schema$Workspace>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Workspace>,
       callback?: BodyResponseCallback<Schema$Workspace>):
       void|AxiosPromise<Schema$Workspace> {
@@ -3600,14 +3606,14 @@ export class Resource$Accounts$Containers$Workspaces {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  updateProposal(params: any, options?: MethodOptions):
+  updateProposal(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$WorkspaceProposal>;
   updateProposal(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$WorkspaceProposal>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$WorkspaceProposal>,
       callback?: BodyResponseCallback<Schema$WorkspaceProposal>): void;
   updateProposal(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$WorkspaceProposal>,
       callback?: BodyResponseCallback<Schema$WorkspaceProposal>):
       void|AxiosPromise<Schema$WorkspaceProposal> {
@@ -3666,16 +3672,16 @@ export class Resource$Accounts$Containers$Workspaces$Built_in_variables {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CreateBuiltInVariableResponse>;
   create(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$CreateBuiltInVariableResponse>,
       callback?: BodyResponseCallback<Schema$CreateBuiltInVariableResponse>):
       void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$CreateBuiltInVariableResponse>,
       callback?: BodyResponseCallback<Schema$CreateBuiltInVariableResponse>):
@@ -3725,12 +3731,12 @@ export class Resource$Accounts$Containers$Workspaces$Built_in_variables {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -3776,17 +3782,17 @@ export class Resource$Accounts$Containers$Workspaces$Built_in_variables {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListEnabledBuiltInVariablesResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListEnabledBuiltInVariablesResponse>,
       callback?:
           BodyResponseCallback<Schema$ListEnabledBuiltInVariablesResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListEnabledBuiltInVariablesResponse>,
       callback?:
@@ -3838,16 +3844,16 @@ export class Resource$Accounts$Containers$Workspaces$Built_in_variables {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  revert(params: any, options?: MethodOptions):
+  revert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RevertBuiltInVariableResponse>;
   revert(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$RevertBuiltInVariableResponse>,
       callback?: BodyResponseCallback<Schema$RevertBuiltInVariableResponse>):
       void;
   revert(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$RevertBuiltInVariableResponse>,
       callback?: BodyResponseCallback<Schema$RevertBuiltInVariableResponse>):
@@ -3909,12 +3915,12 @@ export class Resource$Accounts$Containers$Workspaces$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Folder>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Folder>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Folder>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
       callback?: BodyResponseCallback<Schema$Folder>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
       callback?: BodyResponseCallback<Schema$Folder>):
       void|AxiosPromise<Schema$Folder> {
     if (typeof options === 'function') {
@@ -3960,12 +3966,12 @@ export class Resource$Accounts$Containers$Workspaces$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -4011,14 +4017,14 @@ export class Resource$Accounts$Containers$Workspaces$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  entities(params: any, options?: MethodOptions):
+  entities(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FolderEntities>;
   entities(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$FolderEntities>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$FolderEntities>,
       callback?: BodyResponseCallback<Schema$FolderEntities>): void;
   entities(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$FolderEntities>,
       callback?: BodyResponseCallback<Schema$FolderEntities>):
       void|AxiosPromise<Schema$FolderEntities> {
@@ -4065,10 +4071,10 @@ export class Resource$Accounts$Containers$Workspaces$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Folder>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Folder>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Folder>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
       callback?: BodyResponseCallback<Schema$Folder>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
       callback?: BodyResponseCallback<Schema$Folder>):
       void|AxiosPromise<Schema$Folder> {
     if (typeof options === 'function') {
@@ -4115,14 +4121,14 @@ export class Resource$Accounts$Containers$Workspaces$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListFoldersResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListFoldersResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListFoldersResponse>,
       callback?: BodyResponseCallback<Schema$ListFoldersResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListFoldersResponse>,
       callback?: BodyResponseCallback<Schema$ListFoldersResponse>):
       void|AxiosPromise<Schema$ListFoldersResponse> {
@@ -4174,13 +4180,13 @@ export class Resource$Accounts$Containers$Workspaces$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  move_entities_to_folder(params: any, options?: MethodOptions):
+  move_entities_to_folder(params?: any, options?: MethodOptions):
       AxiosPromise<void>;
   move_entities_to_folder(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   move_entities_to_folder(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -4226,14 +4232,14 @@ export class Resource$Accounts$Containers$Workspaces$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  revert(params: any, options?: MethodOptions):
+  revert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RevertFolderResponse>;
   revert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RevertFolderResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RevertFolderResponse>,
       callback?: BodyResponseCallback<Schema$RevertFolderResponse>): void;
   revert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RevertFolderResponse>,
       callback?: BodyResponseCallback<Schema$RevertFolderResponse>):
       void|AxiosPromise<Schema$RevertFolderResponse> {
@@ -4282,12 +4288,12 @@ export class Resource$Accounts$Containers$Workspaces$Folders {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Folder>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Folder>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Folder>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
       callback?: BodyResponseCallback<Schema$Folder>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Folder>,
       callback?: BodyResponseCallback<Schema$Folder>):
       void|AxiosPromise<Schema$Folder> {
     if (typeof options === 'function') {
@@ -4346,14 +4352,14 @@ export class Resource$Accounts$Containers$Workspaces$Proposal {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$WorkspaceProposal>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$WorkspaceProposal>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$WorkspaceProposal>,
       callback?: BodyResponseCallback<Schema$WorkspaceProposal>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$WorkspaceProposal>,
       callback?: BodyResponseCallback<Schema$WorkspaceProposal>):
       void|AxiosPromise<Schema$WorkspaceProposal> {
@@ -4400,12 +4406,12 @@ export class Resource$Accounts$Containers$Workspaces$Proposal {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -4463,12 +4469,12 @@ export class Resource$Accounts$Containers$Workspaces$Tags {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Tag>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Tag>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Tag>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Tag>,
       callback?: BodyResponseCallback<Schema$Tag>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Tag>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Tag>,
       callback?: BodyResponseCallback<Schema$Tag>):
       void|AxiosPromise<Schema$Tag> {
     if (typeof options === 'function') {
@@ -4514,12 +4520,12 @@ export class Resource$Accounts$Containers$Workspaces$Tags {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -4564,10 +4570,10 @@ export class Resource$Accounts$Containers$Workspaces$Tags {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Tag>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Tag>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Tag>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Tag>,
       callback?: BodyResponseCallback<Schema$Tag>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Tag>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Tag>,
       callback?: BodyResponseCallback<Schema$Tag>):
       void|AxiosPromise<Schema$Tag> {
     if (typeof options === 'function') {
@@ -4614,14 +4620,14 @@ export class Resource$Accounts$Containers$Workspaces$Tags {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListTagsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListTagsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListTagsResponse>,
       callback?: BodyResponseCallback<Schema$ListTagsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListTagsResponse>,
       callback?: BodyResponseCallback<Schema$ListTagsResponse>):
       void|AxiosPromise<Schema$ListTagsResponse> {
@@ -4669,14 +4675,14 @@ export class Resource$Accounts$Containers$Workspaces$Tags {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  revert(params: any, options?: MethodOptions):
+  revert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RevertTagResponse>;
   revert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RevertTagResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$RevertTagResponse>,
       callback?: BodyResponseCallback<Schema$RevertTagResponse>): void;
   revert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$RevertTagResponse>,
       callback?: BodyResponseCallback<Schema$RevertTagResponse>):
       void|AxiosPromise<Schema$RevertTagResponse> {
@@ -4725,12 +4731,12 @@ export class Resource$Accounts$Containers$Workspaces$Tags {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Tag>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Tag>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Tag>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Tag>,
       callback?: BodyResponseCallback<Schema$Tag>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Tag>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Tag>,
       callback?: BodyResponseCallback<Schema$Tag>):
       void|AxiosPromise<Schema$Tag> {
     if (typeof options === 'function') {
@@ -4789,12 +4795,14 @@ export class Resource$Accounts$Containers$Workspaces$Triggers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Trigger>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Trigger>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Trigger>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Trigger>,
       callback?: BodyResponseCallback<Schema$Trigger>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Trigger>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Trigger>,
       callback?: BodyResponseCallback<Schema$Trigger>):
       void|AxiosPromise<Schema$Trigger> {
     if (typeof options === 'function') {
@@ -4840,12 +4848,12 @@ export class Resource$Accounts$Containers$Workspaces$Triggers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -4890,10 +4898,12 @@ export class Resource$Accounts$Containers$Workspaces$Triggers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Trigger>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Trigger>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Trigger>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Trigger>,
       callback?: BodyResponseCallback<Schema$Trigger>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Trigger>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Trigger>,
       callback?: BodyResponseCallback<Schema$Trigger>):
       void|AxiosPromise<Schema$Trigger> {
     if (typeof options === 'function') {
@@ -4940,14 +4950,14 @@ export class Resource$Accounts$Containers$Workspaces$Triggers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListTriggersResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListTriggersResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListTriggersResponse>,
       callback?: BodyResponseCallback<Schema$ListTriggersResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListTriggersResponse>,
       callback?: BodyResponseCallback<Schema$ListTriggersResponse>):
       void|AxiosPromise<Schema$ListTriggersResponse> {
@@ -4995,14 +5005,15 @@ export class Resource$Accounts$Containers$Workspaces$Triggers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  revert(params: any, options?: MethodOptions):
+  revert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RevertTriggerResponse>;
   revert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$RevertTriggerResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$RevertTriggerResponse>,
       callback?: BodyResponseCallback<Schema$RevertTriggerResponse>): void;
   revert(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$RevertTriggerResponse>,
       callback?: BodyResponseCallback<Schema$RevertTriggerResponse>):
@@ -5052,12 +5063,14 @@ export class Resource$Accounts$Containers$Workspaces$Triggers {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Trigger>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Trigger>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Trigger>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Trigger>,
       callback?: BodyResponseCallback<Schema$Trigger>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Trigger>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Trigger>,
       callback?: BodyResponseCallback<Schema$Trigger>):
       void|AxiosPromise<Schema$Trigger> {
     if (typeof options === 'function') {
@@ -5116,12 +5129,13 @@ export class Resource$Accounts$Containers$Workspaces$Variables {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Variable>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Variable>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Variable>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Variable>,
       callback?: BodyResponseCallback<Schema$Variable>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Variable>,
       callback?: BodyResponseCallback<Schema$Variable>):
       void|AxiosPromise<Schema$Variable> {
@@ -5168,12 +5182,12 @@ export class Resource$Accounts$Containers$Workspaces$Variables {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -5218,10 +5232,11 @@ export class Resource$Accounts$Containers$Workspaces$Variables {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Variable>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Variable>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Variable>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Variable>,
       callback?: BodyResponseCallback<Schema$Variable>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Variable>,
       callback?: BodyResponseCallback<Schema$Variable>):
       void|AxiosPromise<Schema$Variable> {
@@ -5269,14 +5284,15 @@ export class Resource$Accounts$Containers$Workspaces$Variables {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListVariablesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListVariablesResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ListVariablesResponse>,
       callback?: BodyResponseCallback<Schema$ListVariablesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListVariablesResponse>,
       callback?: BodyResponseCallback<Schema$ListVariablesResponse>):
@@ -5325,15 +5341,15 @@ export class Resource$Accounts$Containers$Workspaces$Variables {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  revert(params: any, options?: MethodOptions):
+  revert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$RevertVariableResponse>;
   revert(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$RevertVariableResponse>,
       callback?: BodyResponseCallback<Schema$RevertVariableResponse>): void;
   revert(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$RevertVariableResponse>,
       callback?: BodyResponseCallback<Schema$RevertVariableResponse>):
@@ -5383,12 +5399,13 @@ export class Resource$Accounts$Containers$Workspaces$Variables {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Variable>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Variable>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Variable>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Variable>,
       callback?: BodyResponseCallback<Schema$Variable>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Variable>,
       callback?: BodyResponseCallback<Schema$Variable>):
       void|AxiosPromise<Schema$Variable> {
@@ -5450,14 +5467,14 @@ export class Resource$Accounts$User_permissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$UserPermission>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UserPermission>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UserPermission>,
       callback?: BodyResponseCallback<Schema$UserPermission>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UserPermission>,
       callback?: BodyResponseCallback<Schema$UserPermission>):
       void|AxiosPromise<Schema$UserPermission> {
@@ -5505,12 +5522,12 @@ export class Resource$Accounts$User_permissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -5555,12 +5572,12 @@ export class Resource$Accounts$User_permissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$UserPermission>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UserPermission>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UserPermission>,
       callback?: BodyResponseCallback<Schema$UserPermission>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UserPermission>,
       callback?: BodyResponseCallback<Schema$UserPermission>):
       void|AxiosPromise<Schema$UserPermission> {
@@ -5609,16 +5626,16 @@ export class Resource$Accounts$User_permissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListUserPermissionsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListUserPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$ListUserPermissionsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListUserPermissionsResponse>,
       callback?: BodyResponseCallback<Schema$ListUserPermissionsResponse>):
@@ -5668,14 +5685,14 @@ export class Resource$Accounts$User_permissions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$UserPermission>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UserPermission>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UserPermission>,
       callback?: BodyResponseCallback<Schema$UserPermission>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UserPermission>,
       callback?: BodyResponseCallback<Schema$UserPermission>):
       void|AxiosPromise<Schema$UserPermission> {
diff --git a/src/apis/taskqueue/v1beta1.ts b/src/apis/taskqueue/v1beta1.ts
index 26b5290aff..aecbfd1790 100644
--- a/src/apis/taskqueue/v1beta1.ts
+++ b/src/apis/taskqueue/v1beta1.ts
@@ -163,11 +163,11 @@ export class Resource$Taskqueues {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$TaskQueue>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TaskQueue>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$TaskQueue>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TaskQueue>,
       callback?: BodyResponseCallback<Schema$TaskQueue>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TaskQueue>,
       callback?: BodyResponseCallback<Schema$TaskQueue>):
       void|AxiosPromise<Schema$TaskQueue> {
@@ -230,12 +230,12 @@ export class Resource$Tasks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -284,10 +284,10 @@ export class Resource$Tasks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Task>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Task>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Task>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
       callback?: BodyResponseCallback<Schema$Task>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
       callback?: BodyResponseCallback<Schema$Task>):
       void|AxiosPromise<Schema$Task> {
     if (typeof options === 'function') {
@@ -338,12 +338,12 @@ export class Resource$Tasks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  lease(params: any, options?: MethodOptions): AxiosPromise<Schema$Tasks>;
+  lease(params?: any, options?: MethodOptions): AxiosPromise<Schema$Tasks>;
   lease(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Tasks>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Tasks>,
       callback?: BodyResponseCallback<Schema$Tasks>): void;
   lease(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Tasks>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Tasks>,
       callback?: BodyResponseCallback<Schema$Tasks>):
       void|AxiosPromise<Schema$Tasks> {
     if (typeof options === 'function') {
@@ -392,12 +392,12 @@ export class Resource$Tasks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Tasks2>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Tasks2>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Tasks2>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Tasks2>,
       callback?: BodyResponseCallback<Schema$Tasks2>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Tasks2>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Tasks2>,
       callback?: BodyResponseCallback<Schema$Tasks2>):
       void|AxiosPromise<Schema$Tasks2> {
     if (typeof options === 'function') {
diff --git a/src/apis/taskqueue/v1beta2.ts b/src/apis/taskqueue/v1beta2.ts
index 0ad0d64e58..388ef3150f 100644
--- a/src/apis/taskqueue/v1beta2.ts
+++ b/src/apis/taskqueue/v1beta2.ts
@@ -172,11 +172,11 @@ export class Resource$Taskqueues {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$TaskQueue>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TaskQueue>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$TaskQueue>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TaskQueue>,
       callback?: BodyResponseCallback<Schema$TaskQueue>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TaskQueue>,
       callback?: BodyResponseCallback<Schema$TaskQueue>):
       void|AxiosPromise<Schema$TaskQueue> {
@@ -239,12 +239,12 @@ export class Resource$Tasks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -293,10 +293,10 @@ export class Resource$Tasks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Task>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Task>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Task>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
       callback?: BodyResponseCallback<Schema$Task>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
       callback?: BodyResponseCallback<Schema$Task>):
       void|AxiosPromise<Schema$Task> {
     if (typeof options === 'function') {
@@ -346,12 +346,12 @@ export class Resource$Tasks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Task>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Task>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Task>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
       callback?: BodyResponseCallback<Schema$Task>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
       callback?: BodyResponseCallback<Schema$Task>):
       void|AxiosPromise<Schema$Task> {
     if (typeof options === 'function') {
@@ -404,12 +404,12 @@ export class Resource$Tasks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  lease(params: any, options?: MethodOptions): AxiosPromise<Schema$Tasks>;
+  lease(params?: any, options?: MethodOptions): AxiosPromise<Schema$Tasks>;
   lease(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Tasks>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Tasks>,
       callback?: BodyResponseCallback<Schema$Tasks>): void;
   lease(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Tasks>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Tasks>,
       callback?: BodyResponseCallback<Schema$Tasks>):
       void|AxiosPromise<Schema$Tasks> {
     if (typeof options === 'function') {
@@ -458,12 +458,12 @@ export class Resource$Tasks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Tasks2>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Tasks2>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Tasks2>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Tasks2>,
       callback?: BodyResponseCallback<Schema$Tasks2>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Tasks2>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Tasks2>,
       callback?: BodyResponseCallback<Schema$Tasks2>):
       void|AxiosPromise<Schema$Tasks2> {
     if (typeof options === 'function') {
@@ -516,12 +516,12 @@ export class Resource$Tasks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Task>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Task>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Task>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
       callback?: BodyResponseCallback<Schema$Task>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
       callback?: BodyResponseCallback<Schema$Task>):
       void|AxiosPromise<Schema$Task> {
     if (typeof options === 'function') {
@@ -573,12 +573,12 @@ export class Resource$Tasks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Task>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Task>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Task>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
       callback?: BodyResponseCallback<Schema$Task>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
       callback?: BodyResponseCallback<Schema$Task>):
       void|AxiosPromise<Schema$Task> {
     if (typeof options === 'function') {
diff --git a/src/apis/tasks/v1.ts b/src/apis/tasks/v1.ts
index 73053d1398..8cfc2bb74d 100644
--- a/src/apis/tasks/v1.ts
+++ b/src/apis/tasks/v1.ts
@@ -226,12 +226,12 @@ export class Resource$Tasklists {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -276,10 +276,11 @@ export class Resource$Tasklists {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$TaskList>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$TaskList>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$TaskList>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TaskList>,
       callback?: BodyResponseCallback<Schema$TaskList>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TaskList>,
       callback?: BodyResponseCallback<Schema$TaskList>):
       void|AxiosPromise<Schema$TaskList> {
@@ -327,12 +328,13 @@ export class Resource$Tasklists {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$TaskList>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$TaskList>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$TaskList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TaskList>,
       callback?: BodyResponseCallback<Schema$TaskList>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TaskList>,
       callback?: BodyResponseCallback<Schema$TaskList>):
       void|AxiosPromise<Schema$TaskList> {
@@ -380,13 +382,13 @@ export class Resource$Tasklists {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$TaskLists>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$TaskLists>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TaskLists>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TaskLists>,
       callback?: BodyResponseCallback<Schema$TaskLists>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TaskLists>,
       callback?: BodyResponseCallback<Schema$TaskLists>):
       void|AxiosPromise<Schema$TaskLists> {
@@ -435,12 +437,13 @@ export class Resource$Tasklists {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$TaskList>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$TaskList>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$TaskList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TaskList>,
       callback?: BodyResponseCallback<Schema$TaskList>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TaskList>,
       callback?: BodyResponseCallback<Schema$TaskList>):
       void|AxiosPromise<Schema$TaskList> {
@@ -488,12 +491,13 @@ export class Resource$Tasklists {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$TaskList>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$TaskList>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$TaskList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TaskList>,
       callback?: BodyResponseCallback<Schema$TaskList>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TaskList>,
       callback?: BodyResponseCallback<Schema$TaskList>):
       void|AxiosPromise<Schema$TaskList> {
@@ -554,12 +558,12 @@ export class Resource$Tasks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  clear(params: any, options?: MethodOptions): AxiosPromise<void>;
+  clear(params?: any, options?: MethodOptions): AxiosPromise<void>;
   clear(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   clear(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -605,12 +609,12 @@ export class Resource$Tasks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -656,10 +660,10 @@ export class Resource$Tasks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Task>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Task>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Task>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
       callback?: BodyResponseCallback<Schema$Task>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
       callback?: BodyResponseCallback<Schema$Task>):
       void|AxiosPromise<Schema$Task> {
     if (typeof options === 'function') {
@@ -708,12 +712,12 @@ export class Resource$Tasks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Task>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Task>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Task>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
       callback?: BodyResponseCallback<Schema$Task>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
       callback?: BodyResponseCallback<Schema$Task>):
       void|AxiosPromise<Schema$Task> {
     if (typeof options === 'function') {
@@ -769,12 +773,12 @@ export class Resource$Tasks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$Tasks>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$Tasks>;
   list(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Tasks>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Tasks>,
       callback?: BodyResponseCallback<Schema$Tasks>): void;
   list(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Tasks>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Tasks>,
       callback?: BodyResponseCallback<Schema$Tasks>):
       void|AxiosPromise<Schema$Tasks> {
     if (typeof options === 'function') {
@@ -825,12 +829,12 @@ export class Resource$Tasks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  move(params: any, options?: MethodOptions): AxiosPromise<Schema$Task>;
+  move(params?: any, options?: MethodOptions): AxiosPromise<Schema$Task>;
   move(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Task>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
       callback?: BodyResponseCallback<Schema$Task>): void;
   move(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
       callback?: BodyResponseCallback<Schema$Task>):
       void|AxiosPromise<Schema$Task> {
     if (typeof options === 'function') {
@@ -878,12 +882,12 @@ export class Resource$Tasks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Task>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Task>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Task>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
       callback?: BodyResponseCallback<Schema$Task>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
       callback?: BodyResponseCallback<Schema$Task>):
       void|AxiosPromise<Schema$Task> {
     if (typeof options === 'function') {
@@ -931,12 +935,12 @@ export class Resource$Tasks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Task>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Task>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Task>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
       callback?: BodyResponseCallback<Schema$Task>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Task>,
       callback?: BodyResponseCallback<Schema$Task>):
       void|AxiosPromise<Schema$Task> {
     if (typeof options === 'function') {
diff --git a/src/apis/testing/v1.ts b/src/apis/testing/v1.ts
index 711d229468..4a593268ce 100644
--- a/src/apis/testing/v1.ts
+++ b/src/apis/testing/v1.ts
@@ -1118,14 +1118,15 @@ export class Resource$Applicationdetailservice {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getApkDetails(params: any, options?: MethodOptions):
+  getApkDetails(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GetApkDetailsResponse>;
   getApkDetails(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GetApkDetailsResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$GetApkDetailsResponse>,
       callback?: BodyResponseCallback<Schema$GetApkDetailsResponse>): void;
   getApkDetails(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GetApkDetailsResponse>,
       callback?: BodyResponseCallback<Schema$GetApkDetailsResponse>):
@@ -1204,15 +1205,15 @@ export class Resource$Projects$Testmatrices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancel(params: any, options?: MethodOptions):
+  cancel(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CancelTestMatrixResponse>;
   cancel(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$CancelTestMatrixResponse>,
       callback?: BodyResponseCallback<Schema$CancelTestMatrixResponse>): void;
   cancel(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$CancelTestMatrixResponse>,
       callback?: BodyResponseCallback<Schema$CancelTestMatrixResponse>):
@@ -1269,13 +1270,14 @@ export class Resource$Projects$Testmatrices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$TestMatrix>;
+  create(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$TestMatrix>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TestMatrix>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TestMatrix>,
       callback?: BodyResponseCallback<Schema$TestMatrix>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TestMatrix>,
       callback?: BodyResponseCallback<Schema$TestMatrix>):
       void|AxiosPromise<Schema$TestMatrix> {
@@ -1326,11 +1328,11 @@ export class Resource$Projects$Testmatrices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$TestMatrix>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TestMatrix>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$TestMatrix>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TestMatrix>,
       callback?: BodyResponseCallback<Schema$TestMatrix>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TestMatrix>,
       callback?: BodyResponseCallback<Schema$TestMatrix>):
       void|AxiosPromise<Schema$TestMatrix> {
@@ -1395,13 +1397,13 @@ export class Resource$Testenvironmentcatalog {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$TestEnvironmentCatalog>;
-  get(params: any,
-      options: MethodOptions|
+  get(params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TestEnvironmentCatalog>,
       callback?: BodyResponseCallback<Schema$TestEnvironmentCatalog>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TestEnvironmentCatalog>,
       callback?: BodyResponseCallback<Schema$TestEnvironmentCatalog>):
diff --git a/src/apis/texttospeech/v1beta1.ts b/src/apis/texttospeech/v1beta1.ts
index 74be4b336b..353bda0918 100644
--- a/src/apis/texttospeech/v1beta1.ts
+++ b/src/apis/texttospeech/v1beta1.ts
@@ -244,15 +244,15 @@ export class Resource$Text {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  synthesize(params: any, options?: MethodOptions):
+  synthesize(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SynthesizeSpeechResponse>;
   synthesize(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SynthesizeSpeechResponse>,
       callback?: BodyResponseCallback<Schema$SynthesizeSpeechResponse>): void;
   synthesize(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SynthesizeSpeechResponse>,
       callback?: BodyResponseCallback<Schema$SynthesizeSpeechResponse>):
@@ -312,14 +312,14 @@ export class Resource$Voices {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListVoicesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListVoicesResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListVoicesResponse>,
       callback?: BodyResponseCallback<Schema$ListVoicesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListVoicesResponse>,
       callback?: BodyResponseCallback<Schema$ListVoicesResponse>):
       void|AxiosPromise<Schema$ListVoicesResponse> {
diff --git a/src/apis/toolresults/v1beta3.ts b/src/apis/toolresults/v1beta3.ts
index 8375ec78e7..3aa43919ad 100644
--- a/src/apis/toolresults/v1beta3.ts
+++ b/src/apis/toolresults/v1beta3.ts
@@ -1382,14 +1382,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getSettings(params: any, options?: MethodOptions):
+  getSettings(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ProjectSettings>;
   getSettings(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ProjectSettings>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ProjectSettings>,
       callback?: BodyResponseCallback<Schema$ProjectSettings>): void;
   getSettings(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ProjectSettings>,
       callback?: BodyResponseCallback<Schema$ProjectSettings>):
       void|AxiosPromise<Schema$ProjectSettings> {
@@ -1455,14 +1455,14 @@ export class Resource$Projects {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  initializeSettings(params: any, options?: MethodOptions):
+  initializeSettings(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ProjectSettings>;
   initializeSettings(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ProjectSettings>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ProjectSettings>,
       callback?: BodyResponseCallback<Schema$ProjectSettings>): void;
   initializeSettings(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ProjectSettings>,
       callback?: BodyResponseCallback<Schema$ProjectSettings>):
       void|AxiosPromise<Schema$ProjectSettings> {
@@ -1530,12 +1530,14 @@ export class Resource$Projects$Histories {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$History>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$History>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$History>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$History>,
       callback?: BodyResponseCallback<Schema$History>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$History>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$History>,
       callback?: BodyResponseCallback<Schema$History>):
       void|AxiosPromise<Schema$History> {
     if (typeof options === 'function') {
@@ -1586,10 +1588,12 @@ export class Resource$Projects$Histories {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$History>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$History>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$History>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$History>,
       callback?: BodyResponseCallback<Schema$History>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$History>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$History>,
       callback?: BodyResponseCallback<Schema$History>):
       void|AxiosPromise<Schema$History> {
     if (typeof options === 'function') {
@@ -1645,14 +1649,15 @@ export class Resource$Projects$Histories {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListHistoriesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListHistoriesResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ListHistoriesResponse>,
       callback?: BodyResponseCallback<Schema$ListHistoriesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListHistoriesResponse>,
       callback?: BodyResponseCallback<Schema$ListHistoriesResponse>):
@@ -1723,13 +1728,13 @@ export class Resource$Projects$Histories$Executions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Execution>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Execution>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Execution>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Execution>,
       callback?: BodyResponseCallback<Schema$Execution>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Execution>,
       callback?: BodyResponseCallback<Schema$Execution>):
       void|AxiosPromise<Schema$Execution> {
@@ -1783,11 +1788,11 @@ export class Resource$Projects$Histories$Executions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Execution>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Execution>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Execution>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Execution>,
       callback?: BodyResponseCallback<Schema$Execution>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Execution>,
       callback?: BodyResponseCallback<Schema$Execution>):
       void|AxiosPromise<Schema$Execution> {
@@ -1844,15 +1849,15 @@ export class Resource$Projects$Histories$Executions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListExecutionsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListExecutionsResponse>,
       callback?: BodyResponseCallback<Schema$ListExecutionsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListExecutionsResponse>,
       callback?: BodyResponseCallback<Schema$ListExecutionsResponse>):
@@ -1911,13 +1916,13 @@ export class Resource$Projects$Histories$Executions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Execution>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Execution>;
   patch(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Execution>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Execution>,
       callback?: BodyResponseCallback<Schema$Execution>): void;
   patch(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Execution>,
       callback?: BodyResponseCallback<Schema$Execution>):
       void|AxiosPromise<Schema$Execution> {
@@ -1980,12 +1985,12 @@ export class Resource$Projects$Histories$Executions$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$ScreenshotCluster>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ScreenshotCluster>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ScreenshotCluster>,
       callback?: BodyResponseCallback<Schema$ScreenshotCluster>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ScreenshotCluster>,
       callback?: BodyResponseCallback<Schema$ScreenshotCluster>):
       void|AxiosPromise<Schema$ScreenshotCluster> {
@@ -2041,16 +2046,16 @@ export class Resource$Projects$Histories$Executions$Clusters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListScreenshotClustersResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListScreenshotClustersResponse>,
       callback?: BodyResponseCallback<Schema$ListScreenshotClustersResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListScreenshotClustersResponse>,
       callback?: BodyResponseCallback<Schema$ListScreenshotClustersResponse>):
@@ -2134,12 +2139,12 @@ export class Resource$Projects$Histories$Executions$Steps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Step>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Step>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Step>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Step>,
       callback?: BodyResponseCallback<Schema$Step>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Step>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Step>,
       callback?: BodyResponseCallback<Schema$Step>):
       void|AxiosPromise<Schema$Step> {
     if (typeof options === 'function') {
@@ -2193,10 +2198,10 @@ export class Resource$Projects$Histories$Executions$Steps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Step>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Step>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Step>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Step>,
       callback?: BodyResponseCallback<Schema$Step>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Step>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Step>,
       callback?: BodyResponseCallback<Schema$Step>):
       void|AxiosPromise<Schema$Step> {
     if (typeof options === 'function') {
@@ -2250,14 +2255,14 @@ export class Resource$Projects$Histories$Executions$Steps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getPerfMetricsSummary(params: any, options?: MethodOptions):
+  getPerfMetricsSummary(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PerfMetricsSummary>;
   getPerfMetricsSummary(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PerfMetricsSummary>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PerfMetricsSummary>,
       callback?: BodyResponseCallback<Schema$PerfMetricsSummary>): void;
   getPerfMetricsSummary(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PerfMetricsSummary>,
       callback?: BodyResponseCallback<Schema$PerfMetricsSummary>):
       void|AxiosPromise<Schema$PerfMetricsSummary> {
@@ -2317,14 +2322,14 @@ export class Resource$Projects$Histories$Executions$Steps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListStepsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListStepsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListStepsResponse>,
       callback?: BodyResponseCallback<Schema$ListStepsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListStepsResponse>,
       callback?: BodyResponseCallback<Schema$ListStepsResponse>):
       void|AxiosPromise<Schema$ListStepsResponse> {
@@ -2384,12 +2389,12 @@ export class Resource$Projects$Histories$Executions$Steps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  patch(params: any, options?: MethodOptions): AxiosPromise<Schema$Step>;
+  patch(params?: any, options?: MethodOptions): AxiosPromise<Schema$Step>;
   patch(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Step>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Step>,
       callback?: BodyResponseCallback<Schema$Step>): void;
   patch(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Step>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Step>,
       callback?: BodyResponseCallback<Schema$Step>):
       void|AxiosPromise<Schema$Step> {
     if (typeof options === 'function') {
@@ -2446,13 +2451,13 @@ export class Resource$Projects$Histories$Executions$Steps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  publishXunitXmlFiles(params: any, options?: MethodOptions):
+  publishXunitXmlFiles(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Step>;
   publishXunitXmlFiles(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Step>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Step>,
       callback?: BodyResponseCallback<Schema$Step>): void;
   publishXunitXmlFiles(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Step>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Step>,
       callback?: BodyResponseCallback<Schema$Step>):
       void|AxiosPromise<Schema$Step> {
     if (typeof options === 'function') {
@@ -2518,14 +2523,14 @@ export class Resource$Projects$Histories$Executions$Steps$Perfmetricssummary {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PerfMetricsSummary>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PerfMetricsSummary>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PerfMetricsSummary>,
       callback?: BodyResponseCallback<Schema$PerfMetricsSummary>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PerfMetricsSummary>,
       callback?: BodyResponseCallback<Schema$PerfMetricsSummary>):
       void|AxiosPromise<Schema$PerfMetricsSummary> {
@@ -2598,14 +2603,14 @@ export class Resource$Projects$Histories$Executions$Steps$Perfsampleseries {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PerfSampleSeries>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PerfSampleSeries>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PerfSampleSeries>,
       callback?: BodyResponseCallback<Schema$PerfSampleSeries>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PerfSampleSeries>,
       callback?: BodyResponseCallback<Schema$PerfSampleSeries>):
       void|AxiosPromise<Schema$PerfSampleSeries> {
@@ -2659,12 +2664,12 @@ export class Resource$Projects$Histories$Executions$Steps$Perfsampleseries {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$PerfSampleSeries>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PerfSampleSeries>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PerfSampleSeries>,
       callback?: BodyResponseCallback<Schema$PerfSampleSeries>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PerfSampleSeries>,
       callback?: BodyResponseCallback<Schema$PerfSampleSeries>):
       void|AxiosPromise<Schema$PerfSampleSeries> {
@@ -2724,16 +2729,16 @@ export class Resource$Projects$Histories$Executions$Steps$Perfsampleseries {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListPerfSampleSeriesResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListPerfSampleSeriesResponse>,
       callback?: BodyResponseCallback<Schema$ListPerfSampleSeriesResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListPerfSampleSeriesResponse>,
       callback?: BodyResponseCallback<Schema$ListPerfSampleSeriesResponse>):
@@ -2809,16 +2814,16 @@ export class
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  batchCreate(params: any, options?: MethodOptions):
+  batchCreate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BatchCreatePerfSamplesResponse>;
   batchCreate(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$BatchCreatePerfSamplesResponse>,
       callback?: BodyResponseCallback<Schema$BatchCreatePerfSamplesResponse>):
       void;
   batchCreate(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$BatchCreatePerfSamplesResponse>,
       callback?: BodyResponseCallback<Schema$BatchCreatePerfSamplesResponse>):
@@ -2887,15 +2892,15 @@ export class
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListPerfSamplesResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListPerfSamplesResponse>,
       callback?: BodyResponseCallback<Schema$ListPerfSamplesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListPerfSamplesResponse>,
       callback?: BodyResponseCallback<Schema$ListPerfSamplesResponse>):
@@ -2969,15 +2974,15 @@ export class Resource$Projects$Histories$Executions$Steps$Thumbnails {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListStepThumbnailsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListStepThumbnailsResponse>,
       callback?: BodyResponseCallback<Schema$ListStepThumbnailsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListStepThumbnailsResponse>,
       callback?: BodyResponseCallback<Schema$ListStepThumbnailsResponse>):
diff --git a/src/apis/tpu/v1alpha1.ts b/src/apis/tpu/v1alpha1.ts
index e1e73ee43a..062aad9d08 100644
--- a/src/apis/tpu/v1alpha1.ts
+++ b/src/apis/tpu/v1alpha1.ts
@@ -472,7 +472,7 @@ export class Resource$Projects$Locations {
 
   /**
    * tpu.projects.locations.get
-   * @desc Get information about a location.
+   * @desc Gets information about a location.
    * @alias tpu.projects.locations.get
    * @memberOf! ()
    *
@@ -482,10 +482,11 @@ export class Resource$Projects$Locations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Location>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Location>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Location>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Location>,
       callback?: BodyResponseCallback<Schema$Location>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Location>,
       callback?: BodyResponseCallback<Schema$Location>):
       void|AxiosPromise<Schema$Location> {
@@ -498,7 +499,7 @@ export class Resource$Projects$Locations {
       params = {};
     }
     options = options || {};
-    const rootUrl = options.rootUrl || 'https://content-tpu.googleapis.com/';
+    const rootUrl = options.rootUrl || 'https://tpu.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -534,14 +535,15 @@ export class Resource$Projects$Locations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListLocationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListLocationsResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ListLocationsResponse>,
       callback?: BodyResponseCallback<Schema$ListLocationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListLocationsResponse>,
       callback?: BodyResponseCallback<Schema$ListLocationsResponse>):
@@ -555,7 +557,7 @@ export class Resource$Projects$Locations {
       params = {};
     }
     options = options || {};
-    const rootUrl = options.rootUrl || 'https://content-tpu.googleapis.com/';
+    const rootUrl = options.rootUrl || 'https://tpu.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -600,12 +602,12 @@ export class Resource$Projects$Locations$Acceleratortypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$AcceleratorType>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$AcceleratorType>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$AcceleratorType>,
       callback?: BodyResponseCallback<Schema$AcceleratorType>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$AcceleratorType>,
       callback?: BodyResponseCallback<Schema$AcceleratorType>):
       void|AxiosPromise<Schema$AcceleratorType> {
@@ -618,7 +620,7 @@ export class Resource$Projects$Locations$Acceleratortypes {
       params = {};
     }
     options = options || {};
-    const rootUrl = options.rootUrl || 'https://content-tpu.googleapis.com/';
+    const rootUrl = options.rootUrl || 'https://tpu.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -655,16 +657,16 @@ export class Resource$Projects$Locations$Acceleratortypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListAcceleratorTypesResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListAcceleratorTypesResponse>,
       callback?: BodyResponseCallback<Schema$ListAcceleratorTypesResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListAcceleratorTypesResponse>,
       callback?: BodyResponseCallback<Schema$ListAcceleratorTypesResponse>):
@@ -678,7 +680,7 @@ export class Resource$Projects$Locations$Acceleratortypes {
       params = {};
     }
     options = options || {};
-    const rootUrl = options.rootUrl || 'https://content-tpu.googleapis.com/';
+    const rootUrl = options.rootUrl || 'https://tpu.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -727,13 +729,13 @@ export class Resource$Projects$Locations$Nodes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -746,7 +748,7 @@ export class Resource$Projects$Locations$Nodes {
       params = {};
     }
     options = options || {};
-    const rootUrl = options.rootUrl || 'https://content-tpu.googleapis.com/';
+    const rootUrl = options.rootUrl || 'https://tpu.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -780,13 +782,13 @@ export class Resource$Projects$Locations$Nodes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   delete(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   delete(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -799,7 +801,7 @@ export class Resource$Projects$Locations$Nodes {
       params = {};
     }
     options = options || {};
-    const rootUrl = options.rootUrl || 'https://content-tpu.googleapis.com/';
+    const rootUrl = options.rootUrl || 'https://tpu.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -832,10 +834,10 @@ export class Resource$Projects$Locations$Nodes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Node>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Node>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Node>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Node>,
       callback?: BodyResponseCallback<Schema$Node>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Node>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Node>,
       callback?: BodyResponseCallback<Schema$Node>):
       void|AxiosPromise<Schema$Node> {
     if (typeof options === 'function') {
@@ -847,7 +849,7 @@ export class Resource$Projects$Locations$Nodes {
       params = {};
     }
     options = options || {};
-    const rootUrl = options.rootUrl || 'https://content-tpu.googleapis.com/';
+    const rootUrl = options.rootUrl || 'https://tpu.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -882,14 +884,14 @@ export class Resource$Projects$Locations$Nodes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListNodesResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListNodesResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListNodesResponse>,
       callback?: BodyResponseCallback<Schema$ListNodesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListNodesResponse>,
       callback?: BodyResponseCallback<Schema$ListNodesResponse>):
       void|AxiosPromise<Schema$ListNodesResponse> {
@@ -902,7 +904,7 @@ export class Resource$Projects$Locations$Nodes {
       params = {};
     }
     options = options || {};
-    const rootUrl = options.rootUrl || 'https://content-tpu.googleapis.com/';
+    const rootUrl = options.rootUrl || 'https://tpu.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -937,13 +939,14 @@ export class Resource$Projects$Locations$Nodes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  reimage(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  reimage(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$Operation>;
   reimage(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   reimage(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -956,7 +959,7 @@ export class Resource$Projects$Locations$Nodes {
       params = {};
     }
     options = options || {};
-    const rootUrl = options.rootUrl || 'https://content-tpu.googleapis.com/';
+    const rootUrl = options.rootUrl || 'https://tpu.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -991,13 +994,13 @@ export class Resource$Projects$Locations$Nodes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  reset(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  reset(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   reset(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   reset(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1010,7 +1013,7 @@ export class Resource$Projects$Locations$Nodes {
       params = {};
     }
     options = options || {};
-    const rootUrl = options.rootUrl || 'https://content-tpu.googleapis.com/';
+    const rootUrl = options.rootUrl || 'https://tpu.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -1045,13 +1048,13 @@ export class Resource$Projects$Locations$Nodes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  start(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  start(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   start(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   start(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1064,7 +1067,7 @@ export class Resource$Projects$Locations$Nodes {
       params = {};
     }
     options = options || {};
-    const rootUrl = options.rootUrl || 'https://content-tpu.googleapis.com/';
+    const rootUrl = options.rootUrl || 'https://tpu.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -1099,13 +1102,13 @@ export class Resource$Projects$Locations$Nodes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  stop(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  stop(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
   stop(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   stop(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1118,7 +1121,7 @@ export class Resource$Projects$Locations$Nodes {
       params = {};
     }
     options = options || {};
-    const rootUrl = options.rootUrl || 'https://content-tpu.googleapis.com/';
+    const rootUrl = options.rootUrl || 'https://tpu.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -1172,12 +1175,12 @@ export class Resource$Projects$Locations$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancel(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  cancel(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   cancel(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   cancel(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1189,7 +1192,7 @@ export class Resource$Projects$Locations$Operations {
       params = {};
     }
     options = options || {};
-    const rootUrl = options.rootUrl || 'https://content-tpu.googleapis.com/';
+    const rootUrl = options.rootUrl || 'https://tpu.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -1226,12 +1229,12 @@ export class Resource$Projects$Locations$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1243,7 +1246,7 @@ export class Resource$Projects$Locations$Operations {
       params = {};
     }
     options = options || {};
-    const rootUrl = options.rootUrl || 'https://content-tpu.googleapis.com/';
+    const rootUrl = options.rootUrl || 'https://tpu.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -1278,11 +1281,11 @@ export class Resource$Projects$Locations$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1295,7 +1298,7 @@ export class Resource$Projects$Locations$Operations {
       params = {};
     }
     options = options || {};
-    const rootUrl = options.rootUrl || 'https://content-tpu.googleapis.com/';
+    const rootUrl = options.rootUrl || 'https://tpu.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -1339,15 +1342,15 @@ export class Resource$Projects$Locations$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListOperationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>):
@@ -1361,7 +1364,7 @@ export class Resource$Projects$Locations$Operations {
       params = {};
     }
     options = options || {};
-    const rootUrl = options.rootUrl || 'https://content-tpu.googleapis.com/';
+    const rootUrl = options.rootUrl || 'https://tpu.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -1407,12 +1410,12 @@ export class Resource$Projects$Locations$Tensorflowversions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$TensorFlowVersion>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$TensorFlowVersion>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$TensorFlowVersion>,
       callback?: BodyResponseCallback<Schema$TensorFlowVersion>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$TensorFlowVersion>,
       callback?: BodyResponseCallback<Schema$TensorFlowVersion>):
       void|AxiosPromise<Schema$TensorFlowVersion> {
@@ -1425,7 +1428,7 @@ export class Resource$Projects$Locations$Tensorflowversions {
       params = {};
     }
     options = options || {};
-    const rootUrl = options.rootUrl || 'https://content-tpu.googleapis.com/';
+    const rootUrl = options.rootUrl || 'https://tpu.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
@@ -1462,16 +1465,16 @@ export class Resource$Projects$Locations$Tensorflowversions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListTensorFlowVersionsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListTensorFlowVersionsResponse>,
       callback?: BodyResponseCallback<Schema$ListTensorFlowVersionsResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListTensorFlowVersionsResponse>,
       callback?: BodyResponseCallback<Schema$ListTensorFlowVersionsResponse>):
@@ -1485,7 +1488,7 @@ export class Resource$Projects$Locations$Tensorflowversions {
       params = {};
     }
     options = options || {};
-    const rootUrl = options.rootUrl || 'https://content-tpu.googleapis.com/';
+    const rootUrl = options.rootUrl || 'https://tpu.googleapis.com/';
     const parameters = {
       options: Object.assign(
           {
diff --git a/src/apis/translate/v2.ts b/src/apis/translate/v2.ts
index c151fc0694..ffc3255695 100644
--- a/src/apis/translate/v2.ts
+++ b/src/apis/translate/v2.ts
@@ -207,15 +207,15 @@ export class Resource$Detections {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  detect(params: any, options?: MethodOptions):
+  detect(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DetectionsListResponse>;
   detect(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$DetectionsListResponse>,
       callback?: BodyResponseCallback<Schema$DetectionsListResponse>): void;
   detect(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$DetectionsListResponse>,
       callback?: BodyResponseCallback<Schema$DetectionsListResponse>):
@@ -263,15 +263,15 @@ export class Resource$Detections {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$DetectionsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$DetectionsListResponse>,
       callback?: BodyResponseCallback<Schema$DetectionsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$DetectionsListResponse>,
       callback?: BodyResponseCallback<Schema$DetectionsListResponse>):
@@ -332,14 +332,15 @@ export class Resource$Languages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LanguagesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LanguagesListResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$LanguagesListResponse>,
       callback?: BodyResponseCallback<Schema$LanguagesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$LanguagesListResponse>,
       callback?: BodyResponseCallback<Schema$LanguagesListResponse>):
@@ -404,15 +405,15 @@ export class Resource$Translations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TranslationsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TranslationsListResponse>,
       callback?: BodyResponseCallback<Schema$TranslationsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TranslationsListResponse>,
       callback?: BodyResponseCallback<Schema$TranslationsListResponse>):
@@ -460,15 +461,15 @@ export class Resource$Translations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  translate(params: any, options?: MethodOptions):
+  translate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$TranslationsListResponse>;
   translate(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$TranslationsListResponse>,
       callback?: BodyResponseCallback<Schema$TranslationsListResponse>): void;
   translate(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$TranslationsListResponse>,
       callback?: BodyResponseCallback<Schema$TranslationsListResponse>):
diff --git a/src/apis/urlshortener/v1.ts b/src/apis/urlshortener/v1.ts
index 282f265f77..b1bbc74ded 100644
--- a/src/apis/urlshortener/v1.ts
+++ b/src/apis/urlshortener/v1.ts
@@ -210,10 +210,10 @@ export class Resource$Url {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Url>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Url>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Url>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Url>,
       callback?: BodyResponseCallback<Schema$Url>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Url>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Url>,
       callback?: BodyResponseCallback<Schema$Url>):
       void|AxiosPromise<Schema$Url> {
     if (typeof options === 'function') {
@@ -259,12 +259,12 @@ export class Resource$Url {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Url>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Url>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Url>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Url>,
       callback?: BodyResponseCallback<Schema$Url>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Url>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Url>,
       callback?: BodyResponseCallback<Schema$Url>):
       void|AxiosPromise<Schema$Url> {
     if (typeof options === 'function') {
@@ -311,13 +311,13 @@ export class Resource$Url {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$UrlHistory>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$UrlHistory>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UrlHistory>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UrlHistory>,
       callback?: BodyResponseCallback<Schema$UrlHistory>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UrlHistory>,
       callback?: BodyResponseCallback<Schema$UrlHistory>):
       void|AxiosPromise<Schema$UrlHistory> {
diff --git a/src/apis/vault/v1.ts b/src/apis/vault/v1.ts
index f0347950f7..629e643df0 100644
--- a/src/apis/vault/v1.ts
+++ b/src/apis/vault/v1.ts
@@ -385,14 +385,14 @@ export class Resource$Matters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  addPermissions(params: any, options?: MethodOptions):
+  addPermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$MatterPermission>;
   addPermissions(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$MatterPermission>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$MatterPermission>,
       callback?: BodyResponseCallback<Schema$MatterPermission>): void;
   addPermissions(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$MatterPermission>,
       callback?: BodyResponseCallback<Schema$MatterPermission>):
       void|AxiosPromise<Schema$MatterPermission> {
@@ -440,14 +440,14 @@ export class Resource$Matters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  close(params: any, options?: MethodOptions):
+  close(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CloseMatterResponse>;
   close(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CloseMatterResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CloseMatterResponse>,
       callback?: BodyResponseCallback<Schema$CloseMatterResponse>): void;
   close(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CloseMatterResponse>,
       callback?: BodyResponseCallback<Schema$CloseMatterResponse>):
       void|AxiosPromise<Schema$CloseMatterResponse> {
@@ -496,12 +496,12 @@ export class Resource$Matters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Matter>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Matter>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Matter>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Matter>,
       callback?: BodyResponseCallback<Schema$Matter>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Matter>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Matter>,
       callback?: BodyResponseCallback<Schema$Matter>):
       void|AxiosPromise<Schema$Matter> {
     if (typeof options === 'function') {
@@ -546,12 +546,12 @@ export class Resource$Matters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Matter>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Matter>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Matter>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Matter>,
       callback?: BodyResponseCallback<Schema$Matter>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Matter>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Matter>,
       callback?: BodyResponseCallback<Schema$Matter>):
       void|AxiosPromise<Schema$Matter> {
     if (typeof options === 'function') {
@@ -598,10 +598,10 @@ export class Resource$Matters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Matter>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Matter>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Matter>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Matter>,
       callback?: BodyResponseCallback<Schema$Matter>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Matter>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Matter>,
       callback?: BodyResponseCallback<Schema$Matter>):
       void|AxiosPromise<Schema$Matter> {
     if (typeof options === 'function') {
@@ -650,14 +650,14 @@ export class Resource$Matters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListMattersResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListMattersResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListMattersResponse>,
       callback?: BodyResponseCallback<Schema$ListMattersResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListMattersResponse>,
       callback?: BodyResponseCallback<Schema$ListMattersResponse>):
       void|AxiosPromise<Schema$ListMattersResponse> {
@@ -704,13 +704,13 @@ export class Resource$Matters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  removePermissions(params: any, options?: MethodOptions):
+  removePermissions(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Empty>;
   removePermissions(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   removePermissions(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -757,14 +757,14 @@ export class Resource$Matters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  reopen(params: any, options?: MethodOptions):
+  reopen(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ReopenMatterResponse>;
   reopen(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ReopenMatterResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ReopenMatterResponse>,
       callback?: BodyResponseCallback<Schema$ReopenMatterResponse>): void;
   reopen(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ReopenMatterResponse>,
       callback?: BodyResponseCallback<Schema$ReopenMatterResponse>):
       void|AxiosPromise<Schema$ReopenMatterResponse> {
@@ -812,12 +812,12 @@ export class Resource$Matters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  undelete(params: any, options?: MethodOptions): AxiosPromise<Schema$Matter>;
+  undelete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Matter>;
   undelete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Matter>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Matter>,
       callback?: BodyResponseCallback<Schema$Matter>): void;
   undelete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Matter>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Matter>,
       callback?: BodyResponseCallback<Schema$Matter>):
       void|AxiosPromise<Schema$Matter> {
     if (typeof options === 'function') {
@@ -866,12 +866,12 @@ export class Resource$Matters {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Matter>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Matter>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Matter>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Matter>,
       callback?: BodyResponseCallback<Schema$Matter>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Matter>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Matter>,
       callback?: BodyResponseCallback<Schema$Matter>):
       void|AxiosPromise<Schema$Matter> {
     if (typeof options === 'function') {
@@ -931,12 +931,12 @@ export class Resource$Matters$Holds {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Hold>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Hold>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Hold>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Hold>,
       callback?: BodyResponseCallback<Schema$Hold>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Hold>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Hold>,
       callback?: BodyResponseCallback<Schema$Hold>):
       void|AxiosPromise<Schema$Hold> {
     if (typeof options === 'function') {
@@ -984,12 +984,12 @@ export class Resource$Matters$Holds {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1037,10 +1037,10 @@ export class Resource$Matters$Holds {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Hold>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Hold>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Hold>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Hold>,
       callback?: BodyResponseCallback<Schema$Hold>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Hold>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Hold>,
       callback?: BodyResponseCallback<Schema$Hold>):
       void|AxiosPromise<Schema$Hold> {
     if (typeof options === 'function') {
@@ -1090,14 +1090,14 @@ export class Resource$Matters$Holds {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListHoldsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListHoldsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListHoldsResponse>,
       callback?: BodyResponseCallback<Schema$ListHoldsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListHoldsResponse>,
       callback?: BodyResponseCallback<Schema$ListHoldsResponse>):
       void|AxiosPromise<Schema$ListHoldsResponse> {
@@ -1148,12 +1148,12 @@ export class Resource$Matters$Holds {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Hold>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Hold>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Hold>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Hold>,
       callback?: BodyResponseCallback<Schema$Hold>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Hold>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Hold>,
       callback?: BodyResponseCallback<Schema$Hold>):
       void|AxiosPromise<Schema$Hold> {
     if (typeof options === 'function') {
@@ -1214,14 +1214,14 @@ export class Resource$Matters$Holds$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions):
+  create(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$HeldAccount>;
   create(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$HeldAccount>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$HeldAccount>,
       callback?: BodyResponseCallback<Schema$HeldAccount>): void;
   create(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$HeldAccount>,
       callback?: BodyResponseCallback<Schema$HeldAccount>):
       void|AxiosPromise<Schema$HeldAccount> {
@@ -1271,12 +1271,12 @@ export class Resource$Matters$Holds$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1327,15 +1327,15 @@ export class Resource$Matters$Holds$Accounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListHeldAccountsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListHeldAccountsResponse>,
       callback?: BodyResponseCallback<Schema$ListHeldAccountsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListHeldAccountsResponse>,
       callback?: BodyResponseCallback<Schema$ListHeldAccountsResponse>):
diff --git a/src/apis/vision/v1.ts b/src/apis/vision/v1.ts
index 8f24e16b72..ba2ca86ffa 100644
--- a/src/apis/vision/v1.ts
+++ b/src/apis/vision/v1.ts
@@ -552,10 +552,6 @@ export interface Schema$GoogleCloudVisionV1p2beta1AsyncAnnotateFileResponse {
    * The output location and metadata from AsyncAnnotateFileRequest.
    */
   outputConfig: Schema$GoogleCloudVisionV1p2beta1OutputConfig;
-  /**
-   * The full list of output files in GCS.
-   */
-  outputs: Schema$GoogleCloudVisionV1p2beta1GcsDestination[];
 }
 /**
  * Response to an async batch file annotation request.
@@ -657,7 +653,7 @@ export interface Schema$ImageContext {
    */
   languageHints: string[];
   /**
-   * lat/long rectangle that specifies the location of the image.
+   * Not used.
    */
   latLongRect: Schema$LatLongRect;
   /**
@@ -1275,16 +1271,16 @@ export class Resource$Images {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  annotate(params: any, options?: MethodOptions):
+  annotate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$BatchAnnotateImagesResponse>;
   annotate(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$BatchAnnotateImagesResponse>,
       callback?: BodyResponseCallback<Schema$BatchAnnotateImagesResponse>):
       void;
   annotate(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$BatchAnnotateImagesResponse>,
       callback?: BodyResponseCallback<Schema$BatchAnnotateImagesResponse>):
@@ -1360,11 +1356,11 @@ export class Resource$Locations$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1432,12 +1428,12 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  cancel(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  cancel(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   cancel(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   cancel(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1485,12 +1481,12 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -1537,11 +1533,11 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Operation>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1598,15 +1594,15 @@ export class Resource$Operations {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListOperationsResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListOperationsResponse>,
       callback?: BodyResponseCallback<Schema$ListOperationsResponse>):
diff --git a/src/apis/vision/v1p1beta1.ts b/src/apis/vision/v1p1beta1.ts
index d35a31ce8c..517d42e511 100644
--- a/src/apis/vision/v1p1beta1.ts
+++ b/src/apis/vision/v1p1beta1.ts
@@ -550,7 +550,7 @@ export interface Schema$GoogleCloudVisionV1p1beta1ImageContext {
    */
   languageHints: string[];
   /**
-   * lat/long rectangle that specifies the location of the image.
+   * Not used.
    */
   latLongRect: Schema$GoogleCloudVisionV1p1beta1LatLongRect;
   /**
@@ -997,10 +997,6 @@ export interface Schema$GoogleCloudVisionV1p2beta1AsyncAnnotateFileResponse {
    * The output location and metadata from AsyncAnnotateFileRequest.
    */
   outputConfig: Schema$GoogleCloudVisionV1p2beta1OutputConfig;
-  /**
-   * The full list of output files in GCS.
-   */
-  outputs: Schema$GoogleCloudVisionV1p2beta1GcsDestination[];
 }
 /**
  * Response to an async batch file annotation request.
@@ -1159,16 +1155,16 @@ export class Resource$Images {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  annotate(params: any, options?: MethodOptions): AxiosPromise<
+  annotate(params?: any, options?: MethodOptions): AxiosPromise<
       Schema$GoogleCloudVisionV1p1beta1BatchAnnotateImagesResponse>;
   annotate(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$GoogleCloudVisionV1p1beta1BatchAnnotateImagesResponse>,
       callback?: BodyResponseCallback<
           Schema$GoogleCloudVisionV1p1beta1BatchAnnotateImagesResponse>): void;
   annotate(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$GoogleCloudVisionV1p1beta1BatchAnnotateImagesResponse>,
       callback?: BodyResponseCallback<
diff --git a/src/apis/vision/v1p2beta1.ts b/src/apis/vision/v1p2beta1.ts
index 2bb6d49854..63d85d46f7 100644
--- a/src/apis/vision/v1p2beta1.ts
+++ b/src/apis/vision/v1p2beta1.ts
@@ -250,10 +250,6 @@ export interface Schema$GoogleCloudVisionV1p2beta1AsyncAnnotateFileResponse {
    * The output location and metadata from AsyncAnnotateFileRequest.
    */
   outputConfig: Schema$GoogleCloudVisionV1p2beta1OutputConfig;
-  /**
-   * The full list of output files in GCS.
-   */
-  outputs: Schema$GoogleCloudVisionV1p2beta1GcsDestination[];
 }
 /**
  * Multiple async file annotation requests are batched into a single service
@@ -653,7 +649,7 @@ export interface Schema$GoogleCloudVisionV1p2beta1ImageContext {
    */
   languageHints: string[];
   /**
-   * lat/long rectangle that specifies the location of the image.
+   * Not used.
    */
   latLongRect: Schema$GoogleCloudVisionV1p2beta1LatLongRect;
   /**
@@ -1280,14 +1276,14 @@ export class Resource$Files {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  asyncBatchAnnotate(params: any, options?: MethodOptions):
+  asyncBatchAnnotate(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Operation>;
   asyncBatchAnnotate(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Operation>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>): void;
   asyncBatchAnnotate(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Operation>,
       callback?: BodyResponseCallback<Schema$Operation>):
       void|AxiosPromise<Schema$Operation> {
@@ -1346,16 +1342,16 @@ export class Resource$Images {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  annotate(params: any, options?: MethodOptions): AxiosPromise<
+  annotate(params?: any, options?: MethodOptions): AxiosPromise<
       Schema$GoogleCloudVisionV1p2beta1BatchAnnotateImagesResponse>;
   annotate(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<
           Schema$GoogleCloudVisionV1p2beta1BatchAnnotateImagesResponse>,
       callback?: BodyResponseCallback<
           Schema$GoogleCloudVisionV1p2beta1BatchAnnotateImagesResponse>): void;
   annotate(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<
           Schema$GoogleCloudVisionV1p2beta1BatchAnnotateImagesResponse>,
       callback?: BodyResponseCallback<
diff --git a/src/apis/webfonts/v1.ts b/src/apis/webfonts/v1.ts
index d579a94e66..773e313ecd 100644
--- a/src/apis/webfonts/v1.ts
+++ b/src/apis/webfonts/v1.ts
@@ -137,13 +137,13 @@ export class Resource$Webfonts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions): AxiosPromise<Schema$WebfontList>;
+  list(params?: any, options?: MethodOptions): AxiosPromise<Schema$WebfontList>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$WebfontList>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$WebfontList>,
       callback?: BodyResponseCallback<Schema$WebfontList>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$WebfontList>,
       callback?: BodyResponseCallback<Schema$WebfontList>):
       void|AxiosPromise<Schema$WebfontList> {
diff --git a/src/apis/webmasters/v3.ts b/src/apis/webmasters/v3.ts
index e89b1faeea..2f1e59a2ae 100644
--- a/src/apis/webmasters/v3.ts
+++ b/src/apis/webmasters/v3.ts
@@ -375,16 +375,16 @@ export class Resource$Searchanalytics {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  query(params: any, options?: MethodOptions):
+  query(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SearchAnalyticsQueryResponse>;
   query(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SearchAnalyticsQueryResponse>,
       callback?: BodyResponseCallback<Schema$SearchAnalyticsQueryResponse>):
       void;
   query(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SearchAnalyticsQueryResponse>,
       callback?: BodyResponseCallback<Schema$SearchAnalyticsQueryResponse>):
@@ -447,12 +447,12 @@ export class Resource$Sitemaps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -499,11 +499,11 @@ export class Resource$Sitemaps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$WmxSitemap>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$WmxSitemap>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$WmxSitemap>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$WmxSitemap>,
       callback?: BodyResponseCallback<Schema$WmxSitemap>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$WmxSitemap>,
       callback?: BodyResponseCallback<Schema$WmxSitemap>):
       void|AxiosPromise<Schema$WmxSitemap> {
@@ -553,14 +553,14 @@ export class Resource$Sitemaps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SitemapsListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SitemapsListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SitemapsListResponse>,
       callback?: BodyResponseCallback<Schema$SitemapsListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SitemapsListResponse>,
       callback?: BodyResponseCallback<Schema$SitemapsListResponse>):
       void|AxiosPromise<Schema$SitemapsListResponse> {
@@ -608,12 +608,12 @@ export class Resource$Sitemaps {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  submit(params: any, options?: MethodOptions): AxiosPromise<void>;
+  submit(params?: any, options?: MethodOptions): AxiosPromise<void>;
   submit(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   submit(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -671,10 +671,10 @@ export class Resource$Sites {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  add(params: any, options?: MethodOptions): AxiosPromise<void>;
-  add(params: any, options: MethodOptions|BodyResponseCallback<void>,
+  add(params?: any, options?: MethodOptions): AxiosPromise<void>;
+  add(params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
-  add(params: any, options?: MethodOptions|BodyResponseCallback<void>,
+  add(params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -719,12 +719,12 @@ export class Resource$Sites {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -769,10 +769,12 @@ export class Resource$Sites {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$WmxSite>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$WmxSite>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$WmxSite>;
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$WmxSite>,
       callback?: BodyResponseCallback<Schema$WmxSite>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$WmxSite>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$WmxSite>,
       callback?: BodyResponseCallback<Schema$WmxSite>):
       void|AxiosPromise<Schema$WmxSite> {
     if (typeof options === 'function') {
@@ -817,14 +819,14 @@ export class Resource$Sites {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SitesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SitesListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SitesListResponse>,
       callback?: BodyResponseCallback<Schema$SitesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SitesListResponse>,
       callback?: BodyResponseCallback<Schema$SitesListResponse>):
       void|AxiosPromise<Schema$SitesListResponse> {
@@ -887,16 +889,16 @@ export class Resource$Urlcrawlerrorscounts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  query(params: any, options?: MethodOptions):
+  query(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$UrlCrawlErrorsCountsQueryResponse>;
   query(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$UrlCrawlErrorsCountsQueryResponse>,
       callback?:
           BodyResponseCallback<Schema$UrlCrawlErrorsCountsQueryResponse>): void;
   query(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$UrlCrawlErrorsCountsQueryResponse>,
       callback?:
@@ -963,12 +965,12 @@ export class Resource$Urlcrawlerrorssamples {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$UrlCrawlErrorsSample>;
-  get(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$UrlCrawlErrorsSample>,
+  get(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$UrlCrawlErrorsSample>,
       callback?: BodyResponseCallback<Schema$UrlCrawlErrorsSample>): void;
-  get(params: any,
+  get(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$UrlCrawlErrorsSample>,
       callback?: BodyResponseCallback<Schema$UrlCrawlErrorsSample>):
       void|AxiosPromise<Schema$UrlCrawlErrorsSample> {
@@ -1019,16 +1021,16 @@ export class Resource$Urlcrawlerrorssamples {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$UrlCrawlErrorsSamplesListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$UrlCrawlErrorsSamplesListResponse>,
       callback?:
           BodyResponseCallback<Schema$UrlCrawlErrorsSamplesListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$UrlCrawlErrorsSamplesListResponse>,
       callback?:
@@ -1084,12 +1086,12 @@ export class Resource$Urlcrawlerrorssamples {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  markAsFixed(params: any, options?: MethodOptions): AxiosPromise<void>;
+  markAsFixed(params?: any, options?: MethodOptions): AxiosPromise<void>;
   markAsFixed(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   markAsFixed(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
diff --git a/src/apis/youtube/v3.ts b/src/apis/youtube/v3.ts
index 72619dc37c..5db5914c6f 100644
--- a/src/apis/youtube/v3.ts
+++ b/src/apis/youtube/v3.ts
@@ -5033,12 +5033,13 @@ export class Resource$Activities {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Activity>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Activity>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Activity>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Activity>,
       callback?: BodyResponseCallback<Schema$Activity>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Activity>,
       callback?: BodyResponseCallback<Schema$Activity>):
       void|AxiosPromise<Schema$Activity> {
@@ -5096,14 +5097,14 @@ export class Resource$Activities {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ActivityListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ActivityListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ActivityListResponse>,
       callback?: BodyResponseCallback<Schema$ActivityListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ActivityListResponse>,
       callback?: BodyResponseCallback<Schema$ActivityListResponse>):
       void|AxiosPromise<Schema$ActivityListResponse> {
@@ -5164,12 +5165,12 @@ export class Resource$Captions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -5221,12 +5222,12 @@ export class Resource$Captions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  download(params: any, options?: MethodOptions): AxiosPromise<void>;
+  download(params?: any, options?: MethodOptions): AxiosPromise<void>;
   download(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   download(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -5278,12 +5279,14 @@ export class Resource$Captions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Caption>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Caption>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Caption>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Caption>,
       callback?: BodyResponseCallback<Schema$Caption>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Caption>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Caption>,
       callback?: BodyResponseCallback<Schema$Caption>):
       void|AxiosPromise<Schema$Caption> {
     if (typeof options === 'function') {
@@ -5338,14 +5341,14 @@ export class Resource$Captions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CaptionListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CaptionListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CaptionListResponse>,
       callback?: BodyResponseCallback<Schema$CaptionListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CaptionListResponse>,
       callback?: BodyResponseCallback<Schema$CaptionListResponse>):
       void|AxiosPromise<Schema$CaptionListResponse> {
@@ -5401,12 +5404,14 @@ export class Resource$Captions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Caption>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Caption>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Caption>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Caption>,
       callback?: BodyResponseCallback<Schema$Caption>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Caption>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Caption>,
       callback?: BodyResponseCallback<Schema$Caption>):
       void|AxiosPromise<Schema$Caption> {
     if (typeof options === 'function') {
@@ -5479,14 +5484,15 @@ export class Resource$Channelbanners {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ChannelBannerResource>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ChannelBannerResource>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$ChannelBannerResource>,
       callback?: BodyResponseCallback<Schema$ChannelBannerResource>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ChannelBannerResource>,
       callback?: BodyResponseCallback<Schema$ChannelBannerResource>):
@@ -5559,14 +5565,14 @@ export class Resource$Channels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ChannelListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ChannelListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ChannelListResponse>,
       callback?: BodyResponseCallback<Schema$ChannelListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ChannelListResponse>,
       callback?: BodyResponseCallback<Schema$ChannelListResponse>):
       void|AxiosPromise<Schema$ChannelListResponse> {
@@ -5617,12 +5623,14 @@ export class Resource$Channels {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Channel>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Channel>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Channel>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
       callback?: BodyResponseCallback<Schema$Channel>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Channel>,
       callback?: BodyResponseCallback<Schema$Channel>):
       void|AxiosPromise<Schema$Channel> {
     if (typeof options === 'function') {
@@ -5681,12 +5689,12 @@ export class Resource$Channelsections {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -5734,14 +5742,14 @@ export class Resource$Channelsections {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ChannelSection>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ChannelSection>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ChannelSection>,
       callback?: BodyResponseCallback<Schema$ChannelSection>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ChannelSection>,
       callback?: BodyResponseCallback<Schema$ChannelSection>):
       void|AxiosPromise<Schema$ChannelSection> {
@@ -5793,15 +5801,15 @@ export class Resource$Channelsections {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ChannelSectionListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ChannelSectionListResponse>,
       callback?: BodyResponseCallback<Schema$ChannelSectionListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ChannelSectionListResponse>,
       callback?: BodyResponseCallback<Schema$ChannelSectionListResponse>):
@@ -5851,14 +5859,14 @@ export class Resource$Channelsections {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ChannelSection>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ChannelSection>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ChannelSection>,
       callback?: BodyResponseCallback<Schema$ChannelSection>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ChannelSection>,
       callback?: BodyResponseCallback<Schema$ChannelSection>):
       void|AxiosPromise<Schema$ChannelSection> {
@@ -5917,12 +5925,12 @@ export class Resource$Comments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -5969,12 +5977,14 @@ export class Resource$Comments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Comment>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Comment>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Comment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
       callback?: BodyResponseCallback<Schema$Comment>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
       callback?: BodyResponseCallback<Schema$Comment>):
       void|AxiosPromise<Schema$Comment> {
     if (typeof options === 'function') {
@@ -6025,14 +6035,14 @@ export class Resource$Comments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CommentListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CommentListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CommentListResponse>,
       callback?: BodyResponseCallback<Schema$CommentListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CommentListResponse>,
       callback?: BodyResponseCallback<Schema$CommentListResponse>):
       void|AxiosPromise<Schema$CommentListResponse> {
@@ -6080,12 +6090,12 @@ export class Resource$Comments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  markAsSpam(params: any, options?: MethodOptions): AxiosPromise<void>;
+  markAsSpam(params?: any, options?: MethodOptions): AxiosPromise<void>;
   markAsSpam(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   markAsSpam(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -6134,12 +6144,13 @@ export class Resource$Comments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  setModerationStatus(params: any, options?: MethodOptions): AxiosPromise<void>;
+  setModerationStatus(params?: any, options?: MethodOptions):
+      AxiosPromise<void>;
   setModerationStatus(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   setModerationStatus(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -6185,12 +6196,14 @@ export class Resource$Comments {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Comment>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Comment>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Comment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
       callback?: BodyResponseCallback<Schema$Comment>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Comment>,
       callback?: BodyResponseCallback<Schema$Comment>):
       void|AxiosPromise<Schema$Comment> {
     if (typeof options === 'function') {
@@ -6250,14 +6263,14 @@ export class Resource$Commentthreads {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CommentThread>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CommentThread>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CommentThread>,
       callback?: BodyResponseCallback<Schema$CommentThread>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CommentThread>,
       callback?: BodyResponseCallback<Schema$CommentThread>):
       void|AxiosPromise<Schema$CommentThread> {
@@ -6315,15 +6328,15 @@ export class Resource$Commentthreads {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CommentThreadListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$CommentThreadListResponse>,
       callback?: BodyResponseCallback<Schema$CommentThreadListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$CommentThreadListResponse>,
       callback?: BodyResponseCallback<Schema$CommentThreadListResponse>):
@@ -6372,14 +6385,14 @@ export class Resource$Commentthreads {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$CommentThread>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$CommentThread>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$CommentThread>,
       callback?: BodyResponseCallback<Schema$CommentThread>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$CommentThread>,
       callback?: BodyResponseCallback<Schema$CommentThread>):
       void|AxiosPromise<Schema$CommentThread> {
@@ -6441,16 +6454,16 @@ export class Resource$Fanfundingevents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$FanFundingEventListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$FanFundingEventListResponse>,
       callback?: BodyResponseCallback<Schema$FanFundingEventListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$FanFundingEventListResponse>,
       callback?: BodyResponseCallback<Schema$FanFundingEventListResponse>):
@@ -6515,15 +6528,15 @@ export class Resource$Guidecategories {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GuideCategoryListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$GuideCategoryListResponse>,
       callback?: BodyResponseCallback<Schema$GuideCategoryListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GuideCategoryListResponse>,
       callback?: BodyResponseCallback<Schema$GuideCategoryListResponse>):
@@ -6585,15 +6598,15 @@ export class Resource$I18nlanguages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$I18nLanguageListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$I18nLanguageListResponse>,
       callback?: BodyResponseCallback<Schema$I18nLanguageListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$I18nLanguageListResponse>,
       callback?: BodyResponseCallback<Schema$I18nLanguageListResponse>):
@@ -6654,15 +6667,15 @@ export class Resource$I18nregions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$I18nRegionListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$I18nRegionListResponse>,
       callback?: BodyResponseCallback<Schema$I18nRegionListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$I18nRegionListResponse>,
       callback?: BodyResponseCallback<Schema$I18nRegionListResponse>):
@@ -6729,14 +6742,14 @@ export class Resource$Livebroadcasts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  bind(params: any, options?: MethodOptions):
+  bind(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LiveBroadcast>;
   bind(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LiveBroadcast>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LiveBroadcast>,
       callback?: BodyResponseCallback<Schema$LiveBroadcast>): void;
   bind(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LiveBroadcast>,
       callback?: BodyResponseCallback<Schema$LiveBroadcast>):
       void|AxiosPromise<Schema$LiveBroadcast> {
@@ -6790,14 +6803,14 @@ export class Resource$Livebroadcasts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  control(params: any, options?: MethodOptions):
+  control(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LiveBroadcast>;
   control(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LiveBroadcast>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LiveBroadcast>,
       callback?: BodyResponseCallback<Schema$LiveBroadcast>): void;
   control(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LiveBroadcast>,
       callback?: BodyResponseCallback<Schema$LiveBroadcast>):
       void|AxiosPromise<Schema$LiveBroadcast> {
@@ -6846,12 +6859,12 @@ export class Resource$Livebroadcasts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -6899,14 +6912,14 @@ export class Resource$Livebroadcasts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LiveBroadcast>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LiveBroadcast>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LiveBroadcast>,
       callback?: BodyResponseCallback<Schema$LiveBroadcast>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LiveBroadcast>,
       callback?: BodyResponseCallback<Schema$LiveBroadcast>):
       void|AxiosPromise<Schema$LiveBroadcast> {
@@ -6962,15 +6975,15 @@ export class Resource$Livebroadcasts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LiveBroadcastListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$LiveBroadcastListResponse>,
       callback?: BodyResponseCallback<Schema$LiveBroadcastListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$LiveBroadcastListResponse>,
       callback?: BodyResponseCallback<Schema$LiveBroadcastListResponse>):
@@ -7027,14 +7040,14 @@ export class Resource$Livebroadcasts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  transition(params: any, options?: MethodOptions):
+  transition(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LiveBroadcast>;
   transition(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LiveBroadcast>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LiveBroadcast>,
       callback?: BodyResponseCallback<Schema$LiveBroadcast>): void;
   transition(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LiveBroadcast>,
       callback?: BodyResponseCallback<Schema$LiveBroadcast>):
       void|AxiosPromise<Schema$LiveBroadcast> {
@@ -7085,14 +7098,14 @@ export class Resource$Livebroadcasts {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LiveBroadcast>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LiveBroadcast>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LiveBroadcast>,
       callback?: BodyResponseCallback<Schema$LiveBroadcast>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LiveBroadcast>,
       callback?: BodyResponseCallback<Schema$LiveBroadcast>):
       void|AxiosPromise<Schema$LiveBroadcast> {
@@ -7151,12 +7164,12 @@ export class Resource$Livechatbans {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -7202,14 +7215,14 @@ export class Resource$Livechatbans {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LiveChatBan>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LiveChatBan>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LiveChatBan>,
       callback?: BodyResponseCallback<Schema$LiveChatBan>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LiveChatBan>,
       callback?: BodyResponseCallback<Schema$LiveChatBan>):
       void|AxiosPromise<Schema$LiveChatBan> {
@@ -7268,12 +7281,12 @@ export class Resource$Livechatmessages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -7319,14 +7332,14 @@ export class Resource$Livechatmessages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LiveChatMessage>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LiveChatMessage>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LiveChatMessage>,
       callback?: BodyResponseCallback<Schema$LiveChatMessage>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LiveChatMessage>,
       callback?: BodyResponseCallback<Schema$LiveChatMessage>):
       void|AxiosPromise<Schema$LiveChatMessage> {
@@ -7378,16 +7391,16 @@ export class Resource$Livechatmessages {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LiveChatMessageListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$LiveChatMessageListResponse>,
       callback?: BodyResponseCallback<Schema$LiveChatMessageListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$LiveChatMessageListResponse>,
       callback?: BodyResponseCallback<Schema$LiveChatMessageListResponse>):
@@ -7448,12 +7461,12 @@ export class Resource$Livechatmoderators {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -7499,14 +7512,14 @@ export class Resource$Livechatmoderators {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LiveChatModerator>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LiveChatModerator>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LiveChatModerator>,
       callback?: BodyResponseCallback<Schema$LiveChatModerator>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LiveChatModerator>,
       callback?: BodyResponseCallback<Schema$LiveChatModerator>):
       void|AxiosPromise<Schema$LiveChatModerator> {
@@ -7556,16 +7569,16 @@ export class Resource$Livechatmoderators {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LiveChatModeratorListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$LiveChatModeratorListResponse>,
       callback?: BodyResponseCallback<Schema$LiveChatModeratorListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$LiveChatModeratorListResponse>,
       callback?: BodyResponseCallback<Schema$LiveChatModeratorListResponse>):
@@ -7628,12 +7641,12 @@ export class Resource$Livestreams {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -7682,13 +7695,14 @@ export class Resource$Livestreams {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$LiveStream>;
+  insert(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$LiveStream>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LiveStream>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LiveStream>,
       callback?: BodyResponseCallback<Schema$LiveStream>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LiveStream>,
       callback?: BodyResponseCallback<Schema$LiveStream>):
       void|AxiosPromise<Schema$LiveStream> {
@@ -7742,15 +7756,15 @@ export class Resource$Livestreams {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$LiveStreamListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$LiveStreamListResponse>,
       callback?: BodyResponseCallback<Schema$LiveStreamListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$LiveStreamListResponse>,
       callback?: BodyResponseCallback<Schema$LiveStreamListResponse>):
@@ -7803,13 +7817,14 @@ export class Resource$Livestreams {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$LiveStream>;
+  update(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$LiveStream>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$LiveStream>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$LiveStream>,
       callback?: BodyResponseCallback<Schema$LiveStream>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$LiveStream>,
       callback?: BodyResponseCallback<Schema$LiveStream>):
       void|AxiosPromise<Schema$LiveStream> {
@@ -7869,12 +7884,12 @@ export class Resource$Playlistitems {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -7921,14 +7936,14 @@ export class Resource$Playlistitems {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PlaylistItem>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PlaylistItem>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PlaylistItem>,
       callback?: BodyResponseCallback<Schema$PlaylistItem>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PlaylistItem>,
       callback?: BodyResponseCallback<Schema$PlaylistItem>):
       void|AxiosPromise<Schema$PlaylistItem> {
@@ -7983,15 +7998,15 @@ export class Resource$Playlistitems {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PlaylistItemListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$PlaylistItemListResponse>,
       callback?: BodyResponseCallback<Schema$PlaylistItemListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$PlaylistItemListResponse>,
       callback?: BodyResponseCallback<Schema$PlaylistItemListResponse>):
@@ -8042,14 +8057,14 @@ export class Resource$Playlistitems {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions):
+  update(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PlaylistItem>;
   update(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PlaylistItem>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PlaylistItem>,
       callback?: BodyResponseCallback<Schema$PlaylistItem>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PlaylistItem>,
       callback?: BodyResponseCallback<Schema$PlaylistItem>):
       void|AxiosPromise<Schema$PlaylistItem> {
@@ -8109,12 +8124,12 @@ export class Resource$Playlists {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -8162,12 +8177,13 @@ export class Resource$Playlists {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Playlist>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Playlist>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Playlist>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Playlist>,
       callback?: BodyResponseCallback<Schema$Playlist>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Playlist>,
       callback?: BodyResponseCallback<Schema$Playlist>):
       void|AxiosPromise<Schema$Playlist> {
@@ -8225,14 +8241,14 @@ export class Resource$Playlists {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$PlaylistListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$PlaylistListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$PlaylistListResponse>,
       callback?: BodyResponseCallback<Schema$PlaylistListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$PlaylistListResponse>,
       callback?: BodyResponseCallback<Schema$PlaylistListResponse>):
       void|AxiosPromise<Schema$PlaylistListResponse> {
@@ -8282,12 +8298,13 @@ export class Resource$Playlists {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Playlist>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Playlist>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Playlist>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Playlist>,
       callback?: BodyResponseCallback<Schema$Playlist>): void;
   update(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Playlist>,
       callback?: BodyResponseCallback<Schema$Playlist>):
       void|AxiosPromise<Schema$Playlist> {
@@ -8379,14 +8396,14 @@ export class Resource$Search {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SearchListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SearchListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SearchListResponse>,
       callback?: BodyResponseCallback<Schema$SearchListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SearchListResponse>,
       callback?: BodyResponseCallback<Schema$SearchListResponse>):
       void|AxiosPromise<Schema$SearchListResponse> {
@@ -8447,14 +8464,14 @@ export class Resource$Sponsors {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SponsorListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$SponsorListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$SponsorListResponse>,
       callback?: BodyResponseCallback<Schema$SponsorListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$SponsorListResponse>,
       callback?: BodyResponseCallback<Schema$SponsorListResponse>):
       void|AxiosPromise<Schema$SponsorListResponse> {
@@ -8513,12 +8530,12 @@ export class Resource$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -8564,14 +8581,14 @@ export class Resource$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions):
+  insert(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$Subscription>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$Subscription>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$Subscription>,
       callback?: BodyResponseCallback<Schema$Subscription>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$Subscription>,
       callback?: BodyResponseCallback<Schema$Subscription>):
       void|AxiosPromise<Schema$Subscription> {
@@ -8629,15 +8646,15 @@ export class Resource$Subscriptions {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SubscriptionListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SubscriptionListResponse>,
       callback?: BodyResponseCallback<Schema$SubscriptionListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SubscriptionListResponse>,
       callback?: BodyResponseCallback<Schema$SubscriptionListResponse>):
@@ -8700,15 +8717,15 @@ export class Resource$Superchatevents {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$SuperChatEventListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$SuperChatEventListResponse>,
       callback?: BodyResponseCallback<Schema$SuperChatEventListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$SuperChatEventListResponse>,
       callback?: BodyResponseCallback<Schema$SuperChatEventListResponse>):
@@ -8772,12 +8789,12 @@ export class Resource$Thumbnails {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  set(params: any,
+  set(params?: any,
       options?: MethodOptions): AxiosPromise<Schema$ThumbnailSetResponse>;
-  set(params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ThumbnailSetResponse>,
+  set(params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ThumbnailSetResponse>,
       callback?: BodyResponseCallback<Schema$ThumbnailSetResponse>): void;
-  set(params: any,
+  set(params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ThumbnailSetResponse>,
       callback?: BodyResponseCallback<Schema$ThumbnailSetResponse>):
       void|AxiosPromise<Schema$ThumbnailSetResponse> {
@@ -8840,17 +8857,17 @@ export class Resource$Videoabusereportreasons {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$VideoAbuseReportReasonListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$VideoAbuseReportReasonListResponse>,
       callback?:
           BodyResponseCallback<Schema$VideoAbuseReportReasonListResponse>):
       void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$VideoAbuseReportReasonListResponse>,
       callback?:
@@ -8917,15 +8934,15 @@ export class Resource$Videocategories {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$VideoCategoryListResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$VideoCategoryListResponse>,
       callback?: BodyResponseCallback<Schema$VideoCategoryListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$VideoCategoryListResponse>,
       callback?: BodyResponseCallback<Schema$VideoCategoryListResponse>):
@@ -8986,12 +9003,12 @@ export class Resource$Videos {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -9037,15 +9054,15 @@ export class Resource$Videos {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  getRating(params: any, options?: MethodOptions):
+  getRating(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$VideoGetRatingResponse>;
   getRating(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$VideoGetRatingResponse>,
       callback?: BodyResponseCallback<Schema$VideoGetRatingResponse>): void;
   getRating(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$VideoGetRatingResponse>,
       callback?: BodyResponseCallback<Schema$VideoGetRatingResponse>):
@@ -9102,12 +9119,12 @@ export class Resource$Videos {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Video>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Video>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Video>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Video>,
       callback?: BodyResponseCallback<Schema$Video>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Video>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Video>,
       callback?: BodyResponseCallback<Schema$Video>):
       void|AxiosPromise<Schema$Video> {
     if (typeof options === 'function') {
@@ -9166,14 +9183,14 @@ export class Resource$Videos {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$VideoListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$VideoListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$VideoListResponse>,
       callback?: BodyResponseCallback<Schema$VideoListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$VideoListResponse>,
       callback?: BodyResponseCallback<Schema$VideoListResponse>):
       void|AxiosPromise<Schema$VideoListResponse> {
@@ -9221,12 +9238,12 @@ export class Resource$Videos {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  rate(params: any, options?: MethodOptions): AxiosPromise<void>;
+  rate(params?: any, options?: MethodOptions): AxiosPromise<void>;
   rate(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   rate(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -9272,12 +9289,12 @@ export class Resource$Videos {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  reportAbuse(params: any, options?: MethodOptions): AxiosPromise<void>;
+  reportAbuse(params?: any, options?: MethodOptions): AxiosPromise<void>;
   reportAbuse(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   reportAbuse(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -9324,12 +9341,12 @@ export class Resource$Videos {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Video>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Video>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Video>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Video>,
       callback?: BodyResponseCallback<Schema$Video>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Video>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Video>,
       callback?: BodyResponseCallback<Schema$Video>):
       void|AxiosPromise<Schema$Video> {
     if (typeof options === 'function') {
@@ -9391,10 +9408,10 @@ export class Resource$Watermarks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  set(params: any, options?: MethodOptions): AxiosPromise<void>;
-  set(params: any, options: MethodOptions|BodyResponseCallback<void>,
+  set(params?: any, options?: MethodOptions): AxiosPromise<void>;
+  set(params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
-  set(params: any, options?: MethodOptions|BodyResponseCallback<void>,
+  set(params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -9442,12 +9459,12 @@ export class Resource$Watermarks {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  unset(params: any, options?: MethodOptions): AxiosPromise<void>;
+  unset(params?: any, options?: MethodOptions): AxiosPromise<void>;
   unset(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   unset(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
diff --git a/src/apis/youtubeAnalytics/v1.ts b/src/apis/youtubeAnalytics/v1.ts
index 75be1cb8de..10e0370731 100644
--- a/src/apis/youtubeAnalytics/v1.ts
+++ b/src/apis/youtubeAnalytics/v1.ts
@@ -161,12 +161,12 @@ export class Resource$Groupitems {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -212,13 +212,13 @@ export class Resource$Groupitems {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$GroupItem>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$GroupItem>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GroupItem>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GroupItem>,
       callback?: BodyResponseCallback<Schema$GroupItem>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GroupItem>,
       callback?: BodyResponseCallback<Schema$GroupItem>):
       void|AxiosPromise<Schema$GroupItem> {
@@ -267,14 +267,15 @@ export class Resource$Groupitems {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GroupItemListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GroupItemListResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$GroupItemListResponse>,
       callback?: BodyResponseCallback<Schema$GroupItemListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GroupItemListResponse>,
       callback?: BodyResponseCallback<Schema$GroupItemListResponse>):
@@ -335,12 +336,12 @@ export class Resource$Groups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -386,12 +387,12 @@ export class Resource$Groups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Group>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Group>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Group>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Group>,
       callback?: BodyResponseCallback<Schema$Group>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Group>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Group>,
       callback?: BodyResponseCallback<Schema$Group>):
       void|AxiosPromise<Schema$Group> {
     if (typeof options === 'function') {
@@ -442,14 +443,14 @@ export class Resource$Groups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GroupListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GroupListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GroupListResponse>,
       callback?: BodyResponseCallback<Schema$GroupListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GroupListResponse>,
       callback?: BodyResponseCallback<Schema$GroupListResponse>):
       void|AxiosPromise<Schema$GroupListResponse> {
@@ -497,12 +498,12 @@ export class Resource$Groups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Group>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Group>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Group>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Group>,
       callback?: BodyResponseCallback<Schema$Group>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Group>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Group>,
       callback?: BodyResponseCallback<Schema$Group>):
       void|AxiosPromise<Schema$Group> {
     if (typeof options === 'function') {
@@ -570,13 +571,14 @@ export class Resource$Reports {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  query(params: any, options?: MethodOptions): AxiosPromise<Schema$ResultTable>;
+  query(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$ResultTable>;
   query(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ResultTable>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ResultTable>,
       callback?: BodyResponseCallback<Schema$ResultTable>): void;
   query(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ResultTable>,
       callback?: BodyResponseCallback<Schema$ResultTable>):
       void|AxiosPromise<Schema$ResultTable> {
diff --git a/src/apis/youtubeAnalytics/v1beta1.ts b/src/apis/youtubeAnalytics/v1beta1.ts
index 524f9a72f3..6d19c8b24e 100644
--- a/src/apis/youtubeAnalytics/v1beta1.ts
+++ b/src/apis/youtubeAnalytics/v1beta1.ts
@@ -161,12 +161,12 @@ export class Resource$Groupitems {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -212,13 +212,13 @@ export class Resource$Groupitems {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$GroupItem>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$GroupItem>;
   insert(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GroupItem>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GroupItem>,
       callback?: BodyResponseCallback<Schema$GroupItem>): void;
   insert(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GroupItem>,
       callback?: BodyResponseCallback<Schema$GroupItem>):
       void|AxiosPromise<Schema$GroupItem> {
@@ -267,14 +267,15 @@ export class Resource$Groupitems {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GroupItemListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GroupItemListResponse>,
+      params?: any,
+      options?: MethodOptions|
+      BodyResponseCallback<Schema$GroupItemListResponse>,
       callback?: BodyResponseCallback<Schema$GroupItemListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$GroupItemListResponse>,
       callback?: BodyResponseCallback<Schema$GroupItemListResponse>):
@@ -335,12 +336,12 @@ export class Resource$Groups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<void>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<void>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<void>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<void>,
       callback?: BodyResponseCallback<void>): void|AxiosPromise<void> {
     if (typeof options === 'function') {
       callback = options;
@@ -386,12 +387,12 @@ export class Resource$Groups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  insert(params: any, options?: MethodOptions): AxiosPromise<Schema$Group>;
+  insert(params?: any, options?: MethodOptions): AxiosPromise<Schema$Group>;
   insert(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Group>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Group>,
       callback?: BodyResponseCallback<Schema$Group>): void;
   insert(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Group>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Group>,
       callback?: BodyResponseCallback<Schema$Group>):
       void|AxiosPromise<Schema$Group> {
     if (typeof options === 'function') {
@@ -442,14 +443,14 @@ export class Resource$Groups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GroupListResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GroupListResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GroupListResponse>,
       callback?: BodyResponseCallback<Schema$GroupListResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GroupListResponse>,
       callback?: BodyResponseCallback<Schema$GroupListResponse>):
       void|AxiosPromise<Schema$GroupListResponse> {
@@ -497,12 +498,12 @@ export class Resource$Groups {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  update(params: any, options?: MethodOptions): AxiosPromise<Schema$Group>;
+  update(params?: any, options?: MethodOptions): AxiosPromise<Schema$Group>;
   update(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Group>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Group>,
       callback?: BodyResponseCallback<Schema$Group>): void;
   update(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Group>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Group>,
       callback?: BodyResponseCallback<Schema$Group>):
       void|AxiosPromise<Schema$Group> {
     if (typeof options === 'function') {
@@ -570,13 +571,14 @@ export class Resource$Reports {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  query(params: any, options?: MethodOptions): AxiosPromise<Schema$ResultTable>;
+  query(params?: any, options?: MethodOptions):
+      AxiosPromise<Schema$ResultTable>;
   query(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ResultTable>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ResultTable>,
       callback?: BodyResponseCallback<Schema$ResultTable>): void;
   query(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ResultTable>,
       callback?: BodyResponseCallback<Schema$ResultTable>):
       void|AxiosPromise<Schema$ResultTable> {
diff --git a/src/apis/youtubereporting/v1.ts b/src/apis/youtubereporting/v1.ts
index 0bf31d415c..e7eae1645c 100644
--- a/src/apis/youtubereporting/v1.ts
+++ b/src/apis/youtubereporting/v1.ts
@@ -571,12 +571,12 @@ export class Resource$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  create(params: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
+  create(params?: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
   create(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Job>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>): void;
   create(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>):
       void|AxiosPromise<Schema$Job> {
     if (typeof options === 'function') {
@@ -623,12 +623,12 @@ export class Resource$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  delete(params: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
+  delete(params?: any, options?: MethodOptions): AxiosPromise<Schema$Empty>;
   delete(
-      params: any, options: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>): void;
   delete(
-      params: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
+      params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Empty>,
       callback?: BodyResponseCallback<Schema$Empty>):
       void|AxiosPromise<Schema$Empty> {
     if (typeof options === 'function') {
@@ -675,10 +675,10 @@ export class Resource$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Job>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Job>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Job>,
       callback?: BodyResponseCallback<Schema$Job>):
       void|AxiosPromise<Schema$Job> {
     if (typeof options === 'function') {
@@ -727,14 +727,14 @@ export class Resource$Jobs {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListJobsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListJobsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListJobsResponse>,
       callback?: BodyResponseCallback<Schema$ListJobsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListJobsResponse>,
       callback?: BodyResponseCallback<Schema$ListJobsResponse>):
       void|AxiosPromise<Schema$ListJobsResponse> {
@@ -794,10 +794,10 @@ export class Resource$Jobs$Reports {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  get(params: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
-  get(params: any, options: MethodOptions|BodyResponseCallback<Schema$Report>,
+  get(params?: any, options?: MethodOptions): AxiosPromise<Schema$Report>;
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>): void;
-  get(params: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
+  get(params?: any, options?: MethodOptions|BodyResponseCallback<Schema$Report>,
       callback?: BodyResponseCallback<Schema$Report>):
       void|AxiosPromise<Schema$Report> {
     if (typeof options === 'function') {
@@ -851,14 +851,14 @@ export class Resource$Jobs$Reports {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListReportsResponse>;
   list(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$ListReportsResponse>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$ListReportsResponse>,
       callback?: BodyResponseCallback<Schema$ListReportsResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$ListReportsResponse>,
       callback?: BodyResponseCallback<Schema$ListReportsResponse>):
       void|AxiosPromise<Schema$ListReportsResponse> {
@@ -920,14 +920,14 @@ export class Resource$Media {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  download(params: any, options?: MethodOptions):
+  download(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$GdataMedia>;
   download(
-      params: any,
-      options: MethodOptions|BodyResponseCallback<Schema$GdataMedia>,
+      params?: any,
+      options?: MethodOptions|BodyResponseCallback<Schema$GdataMedia>,
       callback?: BodyResponseCallback<Schema$GdataMedia>): void;
   download(
-      params: any,
+      params?: any,
       options?: MethodOptions|BodyResponseCallback<Schema$GdataMedia>,
       callback?: BodyResponseCallback<Schema$GdataMedia>):
       void|AxiosPromise<Schema$GdataMedia> {
@@ -990,15 +990,15 @@ export class Resource$Reporttypes {
    * @param {callback} callback The callback that handles the response.
    * @return {object} Request object
    */
-  list(params: any, options?: MethodOptions):
+  list(params?: any, options?: MethodOptions):
       AxiosPromise<Schema$ListReportTypesResponse>;
   list(
-      params: any,
-      options: MethodOptions|
+      params?: any,
+      options?: MethodOptions|
       BodyResponseCallback<Schema$ListReportTypesResponse>,
       callback?: BodyResponseCallback<Schema$ListReportTypesResponse>): void;
   list(
-      params: any,
+      params?: any,
       options?: MethodOptions|
       BodyResponseCallback<Schema$ListReportTypesResponse>,
       callback?: BodyResponseCallback<Schema$ListReportTypesResponse>):
diff --git a/src/lib/apirequest.ts b/src/lib/apirequest.ts
index ca120e6a52..8a0347be90 100644
--- a/src/lib/apirequest.ts
+++ b/src/lib/apirequest.ts
@@ -71,12 +71,6 @@ async function createAPIRequestAsync<T>(parameters: APIRequestParams) {
   let params = parameters.params;
   const options = Object.assign({}, parameters.options);
 
-  // If the params are not present, and callback was passed instead,
-  // use params as the callback and create empty params.
-  if (typeof params === 'function') {
-    params = {};
-  }
-
   // Create a new params object so it can no longer be modified from outside
   // code Also support global and per-client params, but allow them to be
   // overriden per-request
diff --git a/src/templates/index.njk b/src/templates/index.njk
index 1c5d3efa9c..6f08f371ca 100644
--- a/src/templates/index.njk
+++ b/src/templates/index.njk
@@ -35,7 +35,8 @@ const APIS: APIList = {
 };
 
 export class GeneratedAPIs {
-  private getAPI(api: string, options: ServiceOptions|string) {
+  // tslint:disable-next-line no-any
+  private getAPI<T = any>(api: string, options: ServiceOptions|string) {
     let version: string;
     if (typeof options === 'string') {
       version = options;
@@ -49,7 +50,7 @@ export class GeneratedAPIs {
     try {
       const endpoint = APIS[api][path.basename(version)];
       const ep = new endpoint(options, this);
-      return Object.freeze(ep);  // create new & freeze
+      return Object.freeze(ep) as T;
     } catch (e) {
       throw new Error(
           `Unable to load endpoint ${api}("${version}"): ${e.message}`);
@@ -57,8 +58,8 @@ export class GeneratedAPIs {
   }
 
 {% for apiName, api in apis %}
-{{ apiName }}(options: ServiceOptions|string) {
-  return this.getAPI('{{ apiName }}', options);
+{{ apiName }}<T = {% for versionName, version in api %}{{ apiName }}_{{ version|replace('.','_') }}.{{apiName|capitalize}}{% if not loop.last %}|{% endif %}{% endfor %}>(options: ServiceOptions|string) {
+  return this.getAPI<T>('{{ apiName }}', options);
 }
 {% endfor %}
 }
diff --git a/src/templates/method-partial.njk b/src/templates/method-partial.njk
index 9e11001b4e..fd0a3db7a7 100644
--- a/src/templates/method-partial.njk
+++ b/src/templates/method-partial.njk
@@ -39,9 +39,9 @@
  * @param {callback} callback The callback that handles the response.
  * @return {object} Request object
  */
-{{ mname }}(params: any, options?: MethodOptions): AxiosPromise<{{ ("Schema$"+m.response.$ref) if m.response.$ref else "void" }}>;
-{{ mname }}(params: any, options: MethodOptions|BodyResponseCallback<{{ ("Schema$"+m.response.$ref) if m.response.$ref else "void" }}>, callback?: BodyResponseCallback<{{ ("Schema$"+m.response.$ref) if m.response.$ref else "void" }}>): void;
-{{ mname }}(params: any, options?: MethodOptions|BodyResponseCallback<{{ ("Schema$"+m.response.$ref) if m.response.$ref else "void" }}>, callback?: BodyResponseCallback<{{ ("Schema$"+m.response.$ref) if m.response.$ref else "void" }}>): void|AxiosPromise<{{ ("Schema$"+m.response.$ref) if m.response.$ref else "void" }}> {
+{{ mname }}(params?: any, options?: MethodOptions): AxiosPromise<{{ ("Schema$"+m.response.$ref) if m.response.$ref else "void" }}>;
+{{ mname }}(params?: any, options?: MethodOptions|BodyResponseCallback<{{ ("Schema$"+m.response.$ref) if m.response.$ref else "void" }}>, callback?: BodyResponseCallback<{{ ("Schema$"+m.response.$ref) if m.response.$ref else "void" }}>): void;
+{{ mname }}(params?: any, options?: MethodOptions|BodyResponseCallback<{{ ("Schema$"+m.response.$ref) if m.response.$ref else "void" }}>, callback?: BodyResponseCallback<{{ ("Schema$"+m.response.$ref) if m.response.$ref else "void" }}>): void|AxiosPromise<{{ ("Schema$"+m.response.$ref) if m.response.$ref else "void" }}> {
   if (typeof options === 'function') {
     callback = options;
     options = {};
diff --git a/test/test.clients.ts b/test/test.clients.ts
index 41682da3e5..85200bbf33 100644
--- a/test/test.clients.ts
+++ b/test/test.clients.ts
@@ -16,14 +16,17 @@ import * as fs from 'fs';
 import * as nock from 'nock';
 import * as path from 'path';
 import * as url from 'url';
+
 import {GoogleApis} from '../src';
+import {Datastore} from '../src/apis/datastore/v1';
 import {APIEndpoint} from '../src/lib/api';
+
 import {Utils} from './utils';
 
 function createNock(qs?: string) {
   const query = qs ? `?${qs}` : '';
   nock('https://datastore.googleapis.com')
-      .post(`/v1beta3/projects/test-project-id:lookup${query}`)
+      .post(`/v1/projects/test-project-id:lookup${query}`)
       .reply(200);
 }
 
@@ -91,7 +94,7 @@ describe('Clients', () => {
   it('should support default params', async () => {
     const google = new GoogleApis();
     const datastore =
-        google.datastore({version: 'v1beta3', params: {myParam: '123'}});
+        google.datastore<Datastore>({version: 'v1', params: {myParam: '123'}});
     createNock('myParam=123');
     const res = await datastore.projects.lookup({projectId: 'test-project-id'});
     // If the default param handling is broken, query might be undefined, thus
@@ -101,7 +104,7 @@ describe('Clients', () => {
     assert.notEqual(query.indexOf('myParam=123'), -1, 'Default param in query');
     nock.enableNetConnect();
     const datastore2 = await Utils.loadApi(
-        google, 'datastore', 'v1beta3', {params: {myParam: '123'}});
+        google, 'datastore', 'v1', {params: {myParam: '123'}});
     nock.disableNetConnect();
     createNock('myParam=123');
     const res2 =
@@ -117,7 +120,7 @@ describe('Clients', () => {
   it('should allow default params to be overriden per-request', async () => {
     const google = new GoogleApis();
     const datastore =
-        google.datastore({version: 'v1beta3', params: {myParam: '123'}});
+        google.datastore<Datastore>({version: 'v1', params: {myParam: '123'}});
     // Override the default datasetId param for this particular API call
     createNock('myParam=456');
     const res = await datastore.projects.lookup(
@@ -130,7 +133,7 @@ describe('Clients', () => {
         query.indexOf('myParam=456'), -1, 'Default param not found in query');
     nock.enableNetConnect();
     const datastore2 = await Utils.loadApi(
-        google, 'datastore', 'v1beta3', {params: {myParam: '123'}});
+        google, 'datastore', 'v1', {params: {myParam: '123'}});
     nock.disableNetConnect();
     // Override the default datasetId param for this particular API call
     createNock('myParam=456');
@@ -150,11 +153,11 @@ describe('Clients', () => {
   it('should include default params when only callback is provided to API call',
      async () => {
        const google = new GoogleApis();
-       const datastore = google.datastore({
-         version: 'v1beta3',
+       const datastore = google.datastore<Datastore>({
+         version: 'v1',
          params: {
-           projectId: 'test-project-id',  // We must set this here - it is a
-           // required param
+           // We must set this here - it is a required param
+           projectId: 'test-project-id',
            myParam: '123'
          }
        });
@@ -171,7 +174,7 @@ describe('Clients', () => {
            'Default param not found in query');
 
        nock.enableNetConnect();
-       const datastore2 = await Utils.loadApi(google, 'datastore', 'v1beta3', {
+       const datastore2 = await Utils.loadApi(google, 'datastore', 'v1', {
          params: {
            projectId: 'test-project-id',  // We must set this here - it is a
            // required param
diff --git a/test/test.discover.ts b/test/test.discover.ts
index ce9cffdac2..0d2f77f2df 100644
--- a/test/test.discover.ts
+++ b/test/test.discover.ts
@@ -64,7 +64,8 @@ describe('GoogleApis#discover', () => {
 
       for (const key in localDrive) {
         if (localDrive.hasOwnProperty(key)) {
-          assert(remoteDrive[key], 'generated drive has same keys');
+          // tslint:disable-next-line no-any
+          assert((remoteDrive as any)[key], 'generated drive has same keys');
         }
       }
       done();
diff --git a/test/test.options.ts b/test/test.options.ts
index 73c5eb2124..0c42e52d79 100644
--- a/test/test.options.ts
+++ b/test/test.options.ts
@@ -122,14 +122,13 @@ describe('Options', () => {
     nock(host).get('/drive/v3/files/woot').reply(200);
     const res = await drive.files.get(
         {fileId: 'woot'},
-        {url: 'https://myproxy.com/drive/v3/files/{fileId}', encoding: null});
+        {url: 'https://myproxy.com/drive/v3/files/{fileId}', timeout: 12345});
 
     assert.equal(
         res.request.path, '/drive/v3/files/woot',
         'Request used overridden url.');
     assert.equal(res.request.headers.host, 'myproxy.com');
-    assert.equal(
-        res.config.encoding, null, 'Request used overridden encoding.');
+    assert.equal(res.config.timeout, 12345, 'Axios used overridden timeout.');
   });
 
   it('should apply endpoint options like timeout to oauth transporter',