diff --git a/README.md b/README.md
index 517b10f9..c6c748e6 100644
--- a/README.md
+++ b/README.md
@@ -27,13 +27,13 @@ If you are using Maven, add this to your pom.xml file:
 If you are using Gradle without BOM, add this to your dependencies
 
 ```Groovy
-implementation 'com.google.cloud:google-cloud-functions:2.2.0'
+implementation 'com.google.cloud:google-cloud-functions:2.2.1'
 ```
 
 If you are using SBT, add this to your dependencies
 
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-functions" % "2.2.0"
+libraryDependencies += "com.google.cloud" % "google-cloud-functions" % "2.2.1"
 ```
 
 ## Authentication
diff --git a/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/CallFunctionRequest.java b/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/CallFunctionRequest.java
index 94c255b8..8efc22d6 100644
--- a/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/CallFunctionRequest.java
+++ b/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/CallFunctionRequest.java
@@ -235,10 +235,10 @@ public final boolean isInitialized() {
 
   @java.lang.Override
   public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
-    if (!getNameBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(name_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 1, name_);
     }
-    if (!getDataBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(data_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 2, data_);
     }
     unknownFields.writeTo(output);
@@ -250,10 +250,10 @@ public int getSerializedSize() {
     if (size != -1) return size;
 
     size = 0;
-    if (!getNameBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(name_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, name_);
     }
-    if (!getDataBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(data_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(2, data_);
     }
     size += unknownFields.getSerializedSize();
diff --git a/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/CallFunctionResponse.java b/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/CallFunctionResponse.java
index 999acde9..b6416c46 100644
--- a/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/CallFunctionResponse.java
+++ b/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/CallFunctionResponse.java
@@ -292,13 +292,13 @@ public final boolean isInitialized() {
 
   @java.lang.Override
   public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
-    if (!getExecutionIdBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(executionId_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 1, executionId_);
     }
-    if (!getResultBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(result_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 2, result_);
     }
-    if (!getErrorBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(error_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 3, error_);
     }
     unknownFields.writeTo(output);
@@ -310,13 +310,13 @@ public int getSerializedSize() {
     if (size != -1) return size;
 
     size = 0;
-    if (!getExecutionIdBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(executionId_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, executionId_);
     }
-    if (!getResultBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(result_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(2, result_);
     }
-    if (!getErrorBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(error_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(3, error_);
     }
     size += unknownFields.getSerializedSize();
diff --git a/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/CloudFunction.java b/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/CloudFunction.java
index 03700e1c..d2cc974d 100644
--- a/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/CloudFunction.java
+++ b/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/CloudFunction.java
@@ -2051,10 +2051,10 @@ public final boolean isInitialized() {
 
   @java.lang.Override
   public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
-    if (!getNameBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(name_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 1, name_);
     }
-    if (!getDescriptionBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(description_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 2, description_);
     }
     if (sourceCodeCase_ == 3) {
@@ -2074,7 +2074,7 @@ public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io
             .getNumber()) {
       output.writeEnum(7, status_);
     }
-    if (!getEntryPointBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(entryPoint_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 8, entryPoint_);
     }
     if (timeout_ != null) {
@@ -2083,7 +2083,7 @@ public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io
     if (availableMemoryMb_ != 0) {
       output.writeInt32(10, availableMemoryMb_);
     }
-    if (!getServiceAccountEmailBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(serviceAccountEmail_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 11, serviceAccountEmail_);
     }
     if (updateTime_ != null) {
@@ -2102,16 +2102,16 @@ public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io
         internalGetEnvironmentVariables(),
         EnvironmentVariablesDefaultEntryHolder.defaultEntry,
         17);
-    if (!getNetworkBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(network_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 18, network_);
     }
-    if (!getRuntimeBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(runtime_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 19, runtime_);
     }
     if (maxInstances_ != 0) {
       output.writeInt32(20, maxInstances_);
     }
-    if (!getVpcConnectorBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(vpcConnector_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 22, vpcConnector_);
     }
     if (vpcConnectorEgressSettings_
@@ -2125,7 +2125,7 @@ public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io
             .getNumber()) {
       output.writeEnum(24, ingressSettings_);
     }
-    if (!getBuildIdBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(buildId_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 27, buildId_);
     }
     unknownFields.writeTo(output);
@@ -2137,10 +2137,10 @@ public int getSerializedSize() {
     if (size != -1) return size;
 
     size = 0;
-    if (!getNameBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(name_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, name_);
     }
-    if (!getDescriptionBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(description_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(2, description_);
     }
     if (sourceCodeCase_ == 3) {
@@ -2166,7 +2166,7 @@ public int getSerializedSize() {
             .getNumber()) {
       size += com.google.protobuf.CodedOutputStream.computeEnumSize(7, status_);
     }
-    if (!getEntryPointBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(entryPoint_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(8, entryPoint_);
     }
     if (timeout_ != null) {
@@ -2175,7 +2175,7 @@ public int getSerializedSize() {
     if (availableMemoryMb_ != 0) {
       size += com.google.protobuf.CodedOutputStream.computeInt32Size(10, availableMemoryMb_);
     }
-    if (!getServiceAccountEmailBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(serviceAccountEmail_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(11, serviceAccountEmail_);
     }
     if (updateTime_ != null) {
@@ -2207,16 +2207,16 @@ public int getSerializedSize() {
               .build();
       size += com.google.protobuf.CodedOutputStream.computeMessageSize(17, environmentVariables__);
     }
-    if (!getNetworkBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(network_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(18, network_);
     }
-    if (!getRuntimeBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(runtime_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(19, runtime_);
     }
     if (maxInstances_ != 0) {
       size += com.google.protobuf.CodedOutputStream.computeInt32Size(20, maxInstances_);
     }
-    if (!getVpcConnectorBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(vpcConnector_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(22, vpcConnector_);
     }
     if (vpcConnectorEgressSettings_
@@ -2231,7 +2231,7 @@ public int getSerializedSize() {
             .getNumber()) {
       size += com.google.protobuf.CodedOutputStream.computeEnumSize(24, ingressSettings_);
     }
-    if (!getBuildIdBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(buildId_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(27, buildId_);
     }
     size += unknownFields.getSerializedSize();
diff --git a/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/CreateFunctionRequest.java b/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/CreateFunctionRequest.java
index 32fddd68..8115a8d5 100644
--- a/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/CreateFunctionRequest.java
+++ b/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/CreateFunctionRequest.java
@@ -250,7 +250,7 @@ public final boolean isInitialized() {
 
   @java.lang.Override
   public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
-    if (!getLocationBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(location_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 1, location_);
     }
     if (function_ != null) {
@@ -265,7 +265,7 @@ public int getSerializedSize() {
     if (size != -1) return size;
 
     size = 0;
-    if (!getLocationBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(location_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, location_);
     }
     if (function_ != null) {
diff --git a/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/DeleteFunctionRequest.java b/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/DeleteFunctionRequest.java
index 30de42bd..4fd015fc 100644
--- a/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/DeleteFunctionRequest.java
+++ b/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/DeleteFunctionRequest.java
@@ -178,7 +178,7 @@ public final boolean isInitialized() {
 
   @java.lang.Override
   public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
-    if (!getNameBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(name_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 1, name_);
     }
     unknownFields.writeTo(output);
@@ -190,7 +190,7 @@ public int getSerializedSize() {
     if (size != -1) return size;
 
     size = 0;
-    if (!getNameBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(name_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, name_);
     }
     size += unknownFields.getSerializedSize();
diff --git a/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/EventTrigger.java b/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/EventTrigger.java
index ac06c038..feb8b4a8 100644
--- a/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/EventTrigger.java
+++ b/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/EventTrigger.java
@@ -409,13 +409,13 @@ public final boolean isInitialized() {
 
   @java.lang.Override
   public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
-    if (!getEventTypeBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(eventType_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 1, eventType_);
     }
-    if (!getResourceBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(resource_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 2, resource_);
     }
-    if (!getServiceBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(service_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 3, service_);
     }
     if (failurePolicy_ != null) {
@@ -430,13 +430,13 @@ public int getSerializedSize() {
     if (size != -1) return size;
 
     size = 0;
-    if (!getEventTypeBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(eventType_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, eventType_);
     }
-    if (!getResourceBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(resource_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(2, resource_);
     }
-    if (!getServiceBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(service_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(3, service_);
     }
     if (failurePolicy_ != null) {
diff --git a/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/GenerateDownloadUrlRequest.java b/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/GenerateDownloadUrlRequest.java
index 1280034b..a961e0b7 100644
--- a/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/GenerateDownloadUrlRequest.java
+++ b/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/GenerateDownloadUrlRequest.java
@@ -200,7 +200,7 @@ public final boolean isInitialized() {
 
   @java.lang.Override
   public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
-    if (!getNameBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(name_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 1, name_);
     }
     if (versionId_ != 0L) {
@@ -215,7 +215,7 @@ public int getSerializedSize() {
     if (size != -1) return size;
 
     size = 0;
-    if (!getNameBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(name_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, name_);
     }
     if (versionId_ != 0L) {
diff --git a/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/GenerateDownloadUrlResponse.java b/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/GenerateDownloadUrlResponse.java
index a55bdc7d..7a59fd4e 100644
--- a/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/GenerateDownloadUrlResponse.java
+++ b/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/GenerateDownloadUrlResponse.java
@@ -176,7 +176,7 @@ public final boolean isInitialized() {
 
   @java.lang.Override
   public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
-    if (!getDownloadUrlBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(downloadUrl_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 1, downloadUrl_);
     }
     unknownFields.writeTo(output);
@@ -188,7 +188,7 @@ public int getSerializedSize() {
     if (size != -1) return size;
 
     size = 0;
-    if (!getDownloadUrlBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(downloadUrl_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, downloadUrl_);
     }
     size += unknownFields.getSerializedSize();
diff --git a/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/GenerateUploadUrlRequest.java b/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/GenerateUploadUrlRequest.java
index 4910b85b..fa1af76c 100644
--- a/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/GenerateUploadUrlRequest.java
+++ b/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/GenerateUploadUrlRequest.java
@@ -176,7 +176,7 @@ public final boolean isInitialized() {
 
   @java.lang.Override
   public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
-    if (!getParentBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(parent_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 1, parent_);
     }
     unknownFields.writeTo(output);
@@ -188,7 +188,7 @@ public int getSerializedSize() {
     if (size != -1) return size;
 
     size = 0;
-    if (!getParentBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(parent_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, parent_);
     }
     size += unknownFields.getSerializedSize();
diff --git a/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/GenerateUploadUrlResponse.java b/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/GenerateUploadUrlResponse.java
index 55844172..ab3eccca 100644
--- a/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/GenerateUploadUrlResponse.java
+++ b/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/GenerateUploadUrlResponse.java
@@ -178,7 +178,7 @@ public final boolean isInitialized() {
 
   @java.lang.Override
   public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
-    if (!getUploadUrlBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(uploadUrl_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 1, uploadUrl_);
     }
     unknownFields.writeTo(output);
@@ -190,7 +190,7 @@ public int getSerializedSize() {
     if (size != -1) return size;
 
     size = 0;
-    if (!getUploadUrlBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(uploadUrl_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, uploadUrl_);
     }
     size += unknownFields.getSerializedSize();
diff --git a/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/GetFunctionRequest.java b/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/GetFunctionRequest.java
index 1257655b..14c5795d 100644
--- a/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/GetFunctionRequest.java
+++ b/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/GetFunctionRequest.java
@@ -178,7 +178,7 @@ public final boolean isInitialized() {
 
   @java.lang.Override
   public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
-    if (!getNameBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(name_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 1, name_);
     }
     unknownFields.writeTo(output);
@@ -190,7 +190,7 @@ public int getSerializedSize() {
     if (size != -1) return size;
 
     size = 0;
-    if (!getNameBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(name_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, name_);
     }
     size += unknownFields.getSerializedSize();
diff --git a/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/HttpsTrigger.java b/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/HttpsTrigger.java
index 492fcc76..4c27eab2 100644
--- a/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/HttpsTrigger.java
+++ b/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/HttpsTrigger.java
@@ -387,7 +387,7 @@ public final boolean isInitialized() {
 
   @java.lang.Override
   public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
-    if (!getUrlBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(url_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 1, url_);
     }
     if (securityLevel_
@@ -404,7 +404,7 @@ public int getSerializedSize() {
     if (size != -1) return size;
 
     size = 0;
-    if (!getUrlBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(url_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, url_);
     }
     if (securityLevel_
diff --git a/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/ListFunctionsRequest.java b/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/ListFunctionsRequest.java
index 841fa0c7..01a10765 100644
--- a/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/ListFunctionsRequest.java
+++ b/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/ListFunctionsRequest.java
@@ -270,13 +270,13 @@ public final boolean isInitialized() {
 
   @java.lang.Override
   public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
-    if (!getParentBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(parent_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 1, parent_);
     }
     if (pageSize_ != 0) {
       output.writeInt32(2, pageSize_);
     }
-    if (!getPageTokenBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(pageToken_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 3, pageToken_);
     }
     unknownFields.writeTo(output);
@@ -288,13 +288,13 @@ public int getSerializedSize() {
     if (size != -1) return size;
 
     size = 0;
-    if (!getParentBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(parent_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, parent_);
     }
     if (pageSize_ != 0) {
       size += com.google.protobuf.CodedOutputStream.computeInt32Size(2, pageSize_);
     }
-    if (!getPageTokenBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(pageToken_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(3, pageToken_);
     }
     size += unknownFields.getSerializedSize();
diff --git a/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/ListFunctionsResponse.java b/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/ListFunctionsResponse.java
index cc730cf8..a522f84d 100644
--- a/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/ListFunctionsResponse.java
+++ b/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/ListFunctionsResponse.java
@@ -347,7 +347,7 @@ public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io
     for (int i = 0; i < functions_.size(); i++) {
       output.writeMessage(1, functions_.get(i));
     }
-    if (!getNextPageTokenBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(nextPageToken_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 2, nextPageToken_);
     }
     for (int i = 0; i < unreachable_.size(); i++) {
@@ -365,7 +365,7 @@ public int getSerializedSize() {
     for (int i = 0; i < functions_.size(); i++) {
       size += com.google.protobuf.CodedOutputStream.computeMessageSize(1, functions_.get(i));
     }
-    if (!getNextPageTokenBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(nextPageToken_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(2, nextPageToken_);
     }
     {
diff --git a/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/OperationMetadataV1.java b/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/OperationMetadataV1.java
index 252be479..f52814e7 100644
--- a/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/OperationMetadataV1.java
+++ b/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/OperationMetadataV1.java
@@ -424,7 +424,7 @@ public final boolean isInitialized() {
 
   @java.lang.Override
   public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
-    if (!getTargetBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(target_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 1, target_);
     }
     if (type_ != com.google.cloud.functions.v1.OperationType.OPERATION_UNSPECIFIED.getNumber()) {
@@ -439,7 +439,7 @@ public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io
     if (updateTime_ != null) {
       output.writeMessage(5, getUpdateTime());
     }
-    if (!getBuildIdBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(buildId_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 6, buildId_);
     }
     unknownFields.writeTo(output);
@@ -451,7 +451,7 @@ public int getSerializedSize() {
     if (size != -1) return size;
 
     size = 0;
-    if (!getTargetBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(target_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, target_);
     }
     if (type_ != com.google.cloud.functions.v1.OperationType.OPERATION_UNSPECIFIED.getNumber()) {
@@ -466,7 +466,7 @@ public int getSerializedSize() {
     if (updateTime_ != null) {
       size += com.google.protobuf.CodedOutputStream.computeMessageSize(5, getUpdateTime());
     }
-    if (!getBuildIdBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(buildId_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(6, buildId_);
     }
     size += unknownFields.getSerializedSize();
diff --git a/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/SourceRepository.java b/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/SourceRepository.java
index 4970e50d..8b5e9635 100644
--- a/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/SourceRepository.java
+++ b/proto-google-cloud-functions-v1/src/main/java/com/google/cloud/functions/v1/SourceRepository.java
@@ -256,10 +256,10 @@ public final boolean isInitialized() {
 
   @java.lang.Override
   public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
-    if (!getUrlBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(url_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 1, url_);
     }
-    if (!getDeployedUrlBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(deployedUrl_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 2, deployedUrl_);
     }
     unknownFields.writeTo(output);
@@ -271,10 +271,10 @@ public int getSerializedSize() {
     if (size != -1) return size;
 
     size = 0;
-    if (!getUrlBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(url_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, url_);
     }
-    if (!getDeployedUrlBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(deployedUrl_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(2, deployedUrl_);
     }
     size += unknownFields.getSerializedSize();