From 399530b658bba7150b42d7fbedec79d109b4e9e6 Mon Sep 17 00:00:00 2001
From: Yoshi Automation Bot <yoshi-automation@google.com>
Date: Fri, 19 Feb 2021 12:08:07 -0800
Subject: [PATCH] chore: update gapic-generator-java to 0.0.20 (#300)

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PiperOrigin-RevId: 357800868
Source-Link: https://github.com/googleapis/googleapis/commit/e8bc4471a88ac5f60defe3ed436f517174e59ba0
PiperOrigin-RevId: 356341083
Source-Link: https://github.com/googleapis/googleapis/commit/8d8c008e56f1af31d57f75561e0f1848ffb29eeb
PiperOrigin-RevId: 355768415
Source-Link: https://github.com/googleapis/googleapis/commit/bc89fd90b0dc87b387d83a56b27789f807d9da11
PiperOrigin-RevId: 355768365
Source-Link: https://github.com/googleapis/googleapis/commit/bb17e41ec1e9f1197520560bc13cc5da24e04e6f

build: change package name to correct name
docs: generate sample code in the Java microgenerator
---
 .../v1/LookupServiceClient.java               |  44 +
 .../v1/RegistrationServiceClient.java         | 882 ++++++++++++++++++
 .../servicedirectory/v1/package-info.java     |  23 +
 .../v1/stub/GrpcLookupServiceStub.java        |   1 +
 .../v1/stub/GrpcRegistrationServiceStub.java  |  21 +
 .../v1beta1/LookupServiceClient.java          |  44 +
 .../v1beta1/RegistrationServiceClient.java    | 876 +++++++++++++++++
 .../v1beta1/package-info.java                 |  23 +
 .../v1beta1/stub/GrpcLookupServiceStub.java   |   1 +
 .../stub/GrpcRegistrationServiceStub.java     |  21 +
 .../v1/MockLookupServiceImpl.java             |   8 +-
 .../v1/MockRegistrationServiceImpl.java       | 144 ++-
 .../v1beta1/MockLookupServiceImpl.java        |   8 +-
 .../v1beta1/MockRegistrationServiceImpl.java  | 144 ++-
 synth.metadata                                |   8 +-
 15 files changed, 2206 insertions(+), 42 deletions(-)

diff --git a/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1/LookupServiceClient.java b/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1/LookupServiceClient.java
index 752f3269..9f6d5ecc 100644
--- a/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1/LookupServiceClient.java
+++ b/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1/LookupServiceClient.java
@@ -32,6 +32,19 @@
  * <p>This class provides the ability to make remote calls to the backing service through method
  * calls that map to API methods. Sample code to get started:
  *
+ * <pre>{@code
+ * try (LookupServiceClient lookupServiceClient = LookupServiceClient.create()) {
+ *   ResolveServiceRequest request =
+ *       ResolveServiceRequest.newBuilder()
+ *           .setName(
+ *               ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]").toString())
+ *           .setMaxEndpoints(2074789987)
+ *           .setEndpointFilter("endpointFilter-1834249875")
+ *           .build();
+ *   ResolveServiceResponse response = lookupServiceClient.resolveService(request);
+ * }
+ * }</pre>
+ *
  * <p>Note: close() needs to be called on the LookupServiceClient object to clean up resources such
  * as threads. In the example above, try-with-resources is used, which automatically calls close().
  *
@@ -136,6 +149,21 @@ public LookupServiceStub getStub() {
    * Returns a [service][google.cloud.servicedirectory.v1.Service] and its associated endpoints.
    * Resolving a service is not considered an active developer method.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (LookupServiceClient lookupServiceClient = LookupServiceClient.create()) {
+   *   ResolveServiceRequest request =
+   *       ResolveServiceRequest.newBuilder()
+   *           .setName(
+   *               ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]").toString())
+   *           .setMaxEndpoints(2074789987)
+   *           .setEndpointFilter("endpointFilter-1834249875")
+   *           .build();
+   *   ResolveServiceResponse response = lookupServiceClient.resolveService(request);
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -149,6 +177,22 @@ public final ResolveServiceResponse resolveService(ResolveServiceRequest request
    * Resolving a service is not considered an active developer method.
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (LookupServiceClient lookupServiceClient = LookupServiceClient.create()) {
+   *   ResolveServiceRequest request =
+   *       ResolveServiceRequest.newBuilder()
+   *           .setName(
+   *               ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]").toString())
+   *           .setMaxEndpoints(2074789987)
+   *           .setEndpointFilter("endpointFilter-1834249875")
+   *           .build();
+   *   ApiFuture<ResolveServiceResponse> future =
+   *       lookupServiceClient.resolveServiceCallable().futureCall(request);
+   *   // Do something.
+   *   ResolveServiceResponse response = future.get();
+   * }
+   * }</pre>
    */
   public final UnaryCallable<ResolveServiceRequest, ResolveServiceResponse>
       resolveServiceCallable() {
diff --git a/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1/RegistrationServiceClient.java b/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1/RegistrationServiceClient.java
index 1c1e095f..b7e3f0c3 100644
--- a/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1/RegistrationServiceClient.java
+++ b/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1/RegistrationServiceClient.java
@@ -59,6 +59,16 @@
  * <p>This class provides the ability to make remote calls to the backing service through method
  * calls that map to API methods. Sample code to get started:
  *
+ * <pre>{@code
+ * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+ *   LocationName parent = LocationName.of("[PROJECT]", "[LOCATION]");
+ *   Namespace namespace = Namespace.newBuilder().build();
+ *   String namespaceId = "namespaceId790852566";
+ *   Namespace response =
+ *       registrationServiceClient.createNamespace(parent, namespace, namespaceId);
+ * }
+ * }</pre>
+ *
  * <p>Note: close() needs to be called on the RegistrationServiceClient object to clean up resources
  * such as threads. In the example above, try-with-resources is used, which automatically calls
  * close().
@@ -165,6 +175,18 @@ public RegistrationServiceStub getStub() {
   /**
    * Creates a namespace, and returns the new Namespace.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   LocationName parent = LocationName.of("[PROJECT]", "[LOCATION]");
+   *   Namespace namespace = Namespace.newBuilder().build();
+   *   String namespaceId = "namespaceId790852566";
+   *   Namespace response =
+   *       registrationServiceClient.createNamespace(parent, namespace, namespaceId);
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource name of the project and location the namespace will be
    *     created in.
    * @param namespace Required. A namespace with initial fields set.
@@ -191,6 +213,18 @@ public final Namespace createNamespace(
   /**
    * Creates a namespace, and returns the new Namespace.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   String parent = LocationName.of("[PROJECT]", "[LOCATION]").toString();
+   *   Namespace namespace = Namespace.newBuilder().build();
+   *   String namespaceId = "namespaceId790852566";
+   *   Namespace response =
+   *       registrationServiceClient.createNamespace(parent, namespace, namespaceId);
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource name of the project and location the namespace will be
    *     created in.
    * @param namespace Required. A namespace with initial fields set.
@@ -216,6 +250,20 @@ public final Namespace createNamespace(String parent, Namespace namespace, Strin
   /**
    * Creates a namespace, and returns the new Namespace.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   CreateNamespaceRequest request =
+   *       CreateNamespaceRequest.newBuilder()
+   *           .setParent(LocationName.of("[PROJECT]", "[LOCATION]").toString())
+   *           .setNamespaceId("namespaceId790852566")
+   *           .setNamespace(Namespace.newBuilder().build())
+   *           .build();
+   *   Namespace response = registrationServiceClient.createNamespace(request);
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -228,6 +276,21 @@ public final Namespace createNamespace(CreateNamespaceRequest request) {
    * Creates a namespace, and returns the new Namespace.
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   CreateNamespaceRequest request =
+   *       CreateNamespaceRequest.newBuilder()
+   *           .setParent(LocationName.of("[PROJECT]", "[LOCATION]").toString())
+   *           .setNamespaceId("namespaceId790852566")
+   *           .setNamespace(Namespace.newBuilder().build())
+   *           .build();
+   *   ApiFuture<Namespace> future =
+   *       registrationServiceClient.createNamespaceCallable().futureCall(request);
+   *   // Do something.
+   *   Namespace response = future.get();
+   * }
+   * }</pre>
    */
   public final UnaryCallable<CreateNamespaceRequest, Namespace> createNamespaceCallable() {
     return stub.createNamespaceCallable();
@@ -237,6 +300,17 @@ public final UnaryCallable<CreateNamespaceRequest, Namespace> createNamespaceCal
   /**
    * Lists all namespaces.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   LocationName parent = LocationName.of("[PROJECT]", "[LOCATION]");
+   *   for (Namespace element : registrationServiceClient.listNamespaces(parent).iterateAll()) {
+   *     // doThingsWith(element);
+   *   }
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource name of the project and location whose namespaces we'd
    *     like to list.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
@@ -253,6 +327,17 @@ public final ListNamespacesPagedResponse listNamespaces(LocationName parent) {
   /**
    * Lists all namespaces.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   String parent = LocationName.of("[PROJECT]", "[LOCATION]").toString();
+   *   for (Namespace element : registrationServiceClient.listNamespaces(parent).iterateAll()) {
+   *     // doThingsWith(element);
+   *   }
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource name of the project and location whose namespaces we'd
    *     like to list.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
@@ -266,6 +351,24 @@ public final ListNamespacesPagedResponse listNamespaces(String parent) {
   /**
    * Lists all namespaces.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   ListNamespacesRequest request =
+   *       ListNamespacesRequest.newBuilder()
+   *           .setParent(LocationName.of("[PROJECT]", "[LOCATION]").toString())
+   *           .setPageSize(883849137)
+   *           .setPageToken("pageToken873572522")
+   *           .setFilter("filter-1274492040")
+   *           .setOrderBy("orderBy-1207110587")
+   *           .build();
+   *   for (Namespace element : registrationServiceClient.listNamespaces(request).iterateAll()) {
+   *     // doThingsWith(element);
+   *   }
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -278,6 +381,25 @@ public final ListNamespacesPagedResponse listNamespaces(ListNamespacesRequest re
    * Lists all namespaces.
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   ListNamespacesRequest request =
+   *       ListNamespacesRequest.newBuilder()
+   *           .setParent(LocationName.of("[PROJECT]", "[LOCATION]").toString())
+   *           .setPageSize(883849137)
+   *           .setPageToken("pageToken873572522")
+   *           .setFilter("filter-1274492040")
+   *           .setOrderBy("orderBy-1207110587")
+   *           .build();
+   *   ApiFuture<Namespace> future =
+   *       registrationServiceClient.listNamespacesPagedCallable().futureCall(request);
+   *   // Do something.
+   *   for (Namespace element : future.get().iterateAll()) {
+   *     // doThingsWith(element);
+   *   }
+   * }
+   * }</pre>
    */
   public final UnaryCallable<ListNamespacesRequest, ListNamespacesPagedResponse>
       listNamespacesPagedCallable() {
@@ -289,6 +411,24 @@ public final ListNamespacesPagedResponse listNamespaces(ListNamespacesRequest re
    * Lists all namespaces.
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   while (true) {
+   *     ListNamespacesResponse response =
+   *         registrationServiceClient.listNamespacesCallable().call(request);
+   *     for (Namespace element : response.getResponsesList()) {
+   *       // doThingsWith(element);
+   *     }
+   *     String nextPageToken = response.getNextPageToken();
+   *     if (!Strings.isNullOrEmpty(nextPageToken)) {
+   *       request = request.toBuilder().setPageToken(nextPageToken).build();
+   *     } else {
+   *       break;
+   *     }
+   *   }
+   * }
+   * }</pre>
    */
   public final UnaryCallable<ListNamespacesRequest, ListNamespacesResponse>
       listNamespacesCallable() {
@@ -299,6 +439,15 @@ public final ListNamespacesPagedResponse listNamespaces(ListNamespacesRequest re
   /**
    * Gets a namespace.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   NamespaceName name = NamespaceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]");
+   *   Namespace response = registrationServiceClient.getNamespace(name);
+   * }
+   * }</pre>
+   *
    * @param name Required. The name of the namespace to retrieve.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -312,6 +461,15 @@ public final Namespace getNamespace(NamespaceName name) {
   /**
    * Gets a namespace.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   String name = NamespaceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]").toString();
+   *   Namespace response = registrationServiceClient.getNamespace(name);
+   * }
+   * }</pre>
+   *
    * @param name Required. The name of the namespace to retrieve.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -324,6 +482,18 @@ public final Namespace getNamespace(String name) {
   /**
    * Gets a namespace.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   GetNamespaceRequest request =
+   *       GetNamespaceRequest.newBuilder()
+   *           .setName(NamespaceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]").toString())
+   *           .build();
+   *   Namespace response = registrationServiceClient.getNamespace(request);
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -336,6 +506,19 @@ public final Namespace getNamespace(GetNamespaceRequest request) {
    * Gets a namespace.
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   GetNamespaceRequest request =
+   *       GetNamespaceRequest.newBuilder()
+   *           .setName(NamespaceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]").toString())
+   *           .build();
+   *   ApiFuture<Namespace> future =
+   *       registrationServiceClient.getNamespaceCallable().futureCall(request);
+   *   // Do something.
+   *   Namespace response = future.get();
+   * }
+   * }</pre>
    */
   public final UnaryCallable<GetNamespaceRequest, Namespace> getNamespaceCallable() {
     return stub.getNamespaceCallable();
@@ -345,6 +528,16 @@ public final UnaryCallable<GetNamespaceRequest, Namespace> getNamespaceCallable(
   /**
    * Updates a namespace.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   Namespace namespace = Namespace.newBuilder().build();
+   *   FieldMask updateMask = FieldMask.newBuilder().build();
+   *   Namespace response = registrationServiceClient.updateNamespace(namespace, updateMask);
+   * }
+   * }</pre>
+   *
    * @param namespace Required. The updated namespace.
    * @param updateMask Required. List of fields to be updated in this request.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
@@ -362,6 +555,19 @@ public final Namespace updateNamespace(Namespace namespace, FieldMask updateMask
   /**
    * Updates a namespace.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   UpdateNamespaceRequest request =
+   *       UpdateNamespaceRequest.newBuilder()
+   *           .setNamespace(Namespace.newBuilder().build())
+   *           .setUpdateMask(FieldMask.newBuilder().build())
+   *           .build();
+   *   Namespace response = registrationServiceClient.updateNamespace(request);
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -374,6 +580,20 @@ public final Namespace updateNamespace(UpdateNamespaceRequest request) {
    * Updates a namespace.
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   UpdateNamespaceRequest request =
+   *       UpdateNamespaceRequest.newBuilder()
+   *           .setNamespace(Namespace.newBuilder().build())
+   *           .setUpdateMask(FieldMask.newBuilder().build())
+   *           .build();
+   *   ApiFuture<Namespace> future =
+   *       registrationServiceClient.updateNamespaceCallable().futureCall(request);
+   *   // Do something.
+   *   Namespace response = future.get();
+   * }
+   * }</pre>
    */
   public final UnaryCallable<UpdateNamespaceRequest, Namespace> updateNamespaceCallable() {
     return stub.updateNamespaceCallable();
@@ -383,6 +603,15 @@ public final UnaryCallable<UpdateNamespaceRequest, Namespace> updateNamespaceCal
   /**
    * Deletes a namespace. This also deletes all services and endpoints in the namespace.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   NamespaceName name = NamespaceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]");
+   *   registrationServiceClient.deleteNamespace(name);
+   * }
+   * }</pre>
+   *
    * @param name Required. The name of the namespace to delete.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -396,6 +625,15 @@ public final void deleteNamespace(NamespaceName name) {
   /**
    * Deletes a namespace. This also deletes all services and endpoints in the namespace.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   String name = NamespaceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]").toString();
+   *   registrationServiceClient.deleteNamespace(name);
+   * }
+   * }</pre>
+   *
    * @param name Required. The name of the namespace to delete.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -408,6 +646,18 @@ public final void deleteNamespace(String name) {
   /**
    * Deletes a namespace. This also deletes all services and endpoints in the namespace.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   DeleteNamespaceRequest request =
+   *       DeleteNamespaceRequest.newBuilder()
+   *           .setName(NamespaceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]").toString())
+   *           .build();
+   *   registrationServiceClient.deleteNamespace(request);
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -420,6 +670,19 @@ public final void deleteNamespace(DeleteNamespaceRequest request) {
    * Deletes a namespace. This also deletes all services and endpoints in the namespace.
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   DeleteNamespaceRequest request =
+   *       DeleteNamespaceRequest.newBuilder()
+   *           .setName(NamespaceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]").toString())
+   *           .build();
+   *   ApiFuture<Empty> future =
+   *       registrationServiceClient.deleteNamespaceCallable().futureCall(request);
+   *   // Do something.
+   *   future.get();
+   * }
+   * }</pre>
    */
   public final UnaryCallable<DeleteNamespaceRequest, Empty> deleteNamespaceCallable() {
     return stub.deleteNamespaceCallable();
@@ -429,6 +692,17 @@ public final UnaryCallable<DeleteNamespaceRequest, Empty> deleteNamespaceCallabl
   /**
    * Creates a service, and returns the new Service.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   NamespaceName parent = NamespaceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]");
+   *   Service service = Service.newBuilder().build();
+   *   String serviceId = "serviceId-194185552";
+   *   Service response = registrationServiceClient.createService(parent, service, serviceId);
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource name of the namespace this service will belong to.
    * @param service Required. A service with initial fields set.
    * @param serviceId Required. The Resource ID must be 1-63 characters long, and comply with &lt;a
@@ -453,6 +727,17 @@ public final Service createService(NamespaceName parent, Service service, String
   /**
    * Creates a service, and returns the new Service.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   String parent = NamespaceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]").toString();
+   *   Service service = Service.newBuilder().build();
+   *   String serviceId = "serviceId-194185552";
+   *   Service response = registrationServiceClient.createService(parent, service, serviceId);
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource name of the namespace this service will belong to.
    * @param service Required. A service with initial fields set.
    * @param serviceId Required. The Resource ID must be 1-63 characters long, and comply with &lt;a
@@ -477,6 +762,20 @@ public final Service createService(String parent, Service service, String servic
   /**
    * Creates a service, and returns the new Service.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   CreateServiceRequest request =
+   *       CreateServiceRequest.newBuilder()
+   *           .setParent(NamespaceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]").toString())
+   *           .setServiceId("serviceId-194185552")
+   *           .setService(Service.newBuilder().build())
+   *           .build();
+   *   Service response = registrationServiceClient.createService(request);
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -489,6 +788,21 @@ public final Service createService(CreateServiceRequest request) {
    * Creates a service, and returns the new Service.
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   CreateServiceRequest request =
+   *       CreateServiceRequest.newBuilder()
+   *           .setParent(NamespaceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]").toString())
+   *           .setServiceId("serviceId-194185552")
+   *           .setService(Service.newBuilder().build())
+   *           .build();
+   *   ApiFuture<Service> future =
+   *       registrationServiceClient.createServiceCallable().futureCall(request);
+   *   // Do something.
+   *   Service response = future.get();
+   * }
+   * }</pre>
    */
   public final UnaryCallable<CreateServiceRequest, Service> createServiceCallable() {
     return stub.createServiceCallable();
@@ -498,6 +812,17 @@ public final UnaryCallable<CreateServiceRequest, Service> createServiceCallable(
   /**
    * Lists all services belonging to a namespace.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   NamespaceName parent = NamespaceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]");
+   *   for (Service element : registrationServiceClient.listServices(parent).iterateAll()) {
+   *     // doThingsWith(element);
+   *   }
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource name of the namespace whose services we'd like to list.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -513,6 +838,17 @@ public final ListServicesPagedResponse listServices(NamespaceName parent) {
   /**
    * Lists all services belonging to a namespace.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   String parent = NamespaceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]").toString();
+   *   for (Service element : registrationServiceClient.listServices(parent).iterateAll()) {
+   *     // doThingsWith(element);
+   *   }
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource name of the namespace whose services we'd like to list.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -525,6 +861,24 @@ public final ListServicesPagedResponse listServices(String parent) {
   /**
    * Lists all services belonging to a namespace.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   ListServicesRequest request =
+   *       ListServicesRequest.newBuilder()
+   *           .setParent(NamespaceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]").toString())
+   *           .setPageSize(883849137)
+   *           .setPageToken("pageToken873572522")
+   *           .setFilter("filter-1274492040")
+   *           .setOrderBy("orderBy-1207110587")
+   *           .build();
+   *   for (Service element : registrationServiceClient.listServices(request).iterateAll()) {
+   *     // doThingsWith(element);
+   *   }
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -537,6 +891,25 @@ public final ListServicesPagedResponse listServices(ListServicesRequest request)
    * Lists all services belonging to a namespace.
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   ListServicesRequest request =
+   *       ListServicesRequest.newBuilder()
+   *           .setParent(NamespaceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]").toString())
+   *           .setPageSize(883849137)
+   *           .setPageToken("pageToken873572522")
+   *           .setFilter("filter-1274492040")
+   *           .setOrderBy("orderBy-1207110587")
+   *           .build();
+   *   ApiFuture<Service> future =
+   *       registrationServiceClient.listServicesPagedCallable().futureCall(request);
+   *   // Do something.
+   *   for (Service element : future.get().iterateAll()) {
+   *     // doThingsWith(element);
+   *   }
+   * }
+   * }</pre>
    */
   public final UnaryCallable<ListServicesRequest, ListServicesPagedResponse>
       listServicesPagedCallable() {
@@ -548,6 +921,24 @@ public final ListServicesPagedResponse listServices(ListServicesRequest request)
    * Lists all services belonging to a namespace.
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   while (true) {
+   *     ListServicesResponse response =
+   *         registrationServiceClient.listServicesCallable().call(request);
+   *     for (Service element : response.getResponsesList()) {
+   *       // doThingsWith(element);
+   *     }
+   *     String nextPageToken = response.getNextPageToken();
+   *     if (!Strings.isNullOrEmpty(nextPageToken)) {
+   *       request = request.toBuilder().setPageToken(nextPageToken).build();
+   *     } else {
+   *       break;
+   *     }
+   *   }
+   * }
+   * }</pre>
    */
   public final UnaryCallable<ListServicesRequest, ListServicesResponse> listServicesCallable() {
     return stub.listServicesCallable();
@@ -557,6 +948,15 @@ public final UnaryCallable<ListServicesRequest, ListServicesResponse> listServic
   /**
    * Gets a service.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   ServiceName name = ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]");
+   *   Service response = registrationServiceClient.getService(name);
+   * }
+   * }</pre>
+   *
    * @param name Required. The name of the service to get.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -570,6 +970,16 @@ public final Service getService(ServiceName name) {
   /**
    * Gets a service.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   String name =
+   *       ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]").toString();
+   *   Service response = registrationServiceClient.getService(name);
+   * }
+   * }</pre>
+   *
    * @param name Required. The name of the service to get.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -582,6 +992,19 @@ public final Service getService(String name) {
   /**
    * Gets a service.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   GetServiceRequest request =
+   *       GetServiceRequest.newBuilder()
+   *           .setName(
+   *               ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]").toString())
+   *           .build();
+   *   Service response = registrationServiceClient.getService(request);
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -594,6 +1017,20 @@ public final Service getService(GetServiceRequest request) {
    * Gets a service.
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   GetServiceRequest request =
+   *       GetServiceRequest.newBuilder()
+   *           .setName(
+   *               ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]").toString())
+   *           .build();
+   *   ApiFuture<Service> future =
+   *       registrationServiceClient.getServiceCallable().futureCall(request);
+   *   // Do something.
+   *   Service response = future.get();
+   * }
+   * }</pre>
    */
   public final UnaryCallable<GetServiceRequest, Service> getServiceCallable() {
     return stub.getServiceCallable();
@@ -603,6 +1040,16 @@ public final UnaryCallable<GetServiceRequest, Service> getServiceCallable() {
   /**
    * Updates a service.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   Service service = Service.newBuilder().build();
+   *   FieldMask updateMask = FieldMask.newBuilder().build();
+   *   Service response = registrationServiceClient.updateService(service, updateMask);
+   * }
+   * }</pre>
+   *
    * @param service Required. The updated service.
    * @param updateMask Required. List of fields to be updated in this request.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
@@ -617,6 +1064,19 @@ public final Service updateService(Service service, FieldMask updateMask) {
   /**
    * Updates a service.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   UpdateServiceRequest request =
+   *       UpdateServiceRequest.newBuilder()
+   *           .setService(Service.newBuilder().build())
+   *           .setUpdateMask(FieldMask.newBuilder().build())
+   *           .build();
+   *   Service response = registrationServiceClient.updateService(request);
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -629,6 +1089,20 @@ public final Service updateService(UpdateServiceRequest request) {
    * Updates a service.
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   UpdateServiceRequest request =
+   *       UpdateServiceRequest.newBuilder()
+   *           .setService(Service.newBuilder().build())
+   *           .setUpdateMask(FieldMask.newBuilder().build())
+   *           .build();
+   *   ApiFuture<Service> future =
+   *       registrationServiceClient.updateServiceCallable().futureCall(request);
+   *   // Do something.
+   *   Service response = future.get();
+   * }
+   * }</pre>
    */
   public final UnaryCallable<UpdateServiceRequest, Service> updateServiceCallable() {
     return stub.updateServiceCallable();
@@ -638,6 +1112,15 @@ public final UnaryCallable<UpdateServiceRequest, Service> updateServiceCallable(
   /**
    * Deletes a service. This also deletes all endpoints associated with the service.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   ServiceName name = ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]");
+   *   registrationServiceClient.deleteService(name);
+   * }
+   * }</pre>
+   *
    * @param name Required. The name of the service to delete.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -651,6 +1134,16 @@ public final void deleteService(ServiceName name) {
   /**
    * Deletes a service. This also deletes all endpoints associated with the service.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   String name =
+   *       ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]").toString();
+   *   registrationServiceClient.deleteService(name);
+   * }
+   * }</pre>
+   *
    * @param name Required. The name of the service to delete.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -663,6 +1156,19 @@ public final void deleteService(String name) {
   /**
    * Deletes a service. This also deletes all endpoints associated with the service.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   DeleteServiceRequest request =
+   *       DeleteServiceRequest.newBuilder()
+   *           .setName(
+   *               ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]").toString())
+   *           .build();
+   *   registrationServiceClient.deleteService(request);
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -675,6 +1181,20 @@ public final void deleteService(DeleteServiceRequest request) {
    * Deletes a service. This also deletes all endpoints associated with the service.
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   DeleteServiceRequest request =
+   *       DeleteServiceRequest.newBuilder()
+   *           .setName(
+   *               ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]").toString())
+   *           .build();
+   *   ApiFuture<Empty> future =
+   *       registrationServiceClient.deleteServiceCallable().futureCall(request);
+   *   // Do something.
+   *   future.get();
+   * }
+   * }</pre>
    */
   public final UnaryCallable<DeleteServiceRequest, Empty> deleteServiceCallable() {
     return stub.deleteServiceCallable();
@@ -684,6 +1204,17 @@ public final UnaryCallable<DeleteServiceRequest, Empty> deleteServiceCallable()
   /**
    * Creates a endpoint, and returns the new Endpoint.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   ServiceName parent = ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]");
+   *   Endpoint endpoint = Endpoint.newBuilder().build();
+   *   String endpointId = "endpointId-1837754992";
+   *   Endpoint response = registrationServiceClient.createEndpoint(parent, endpoint, endpointId);
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource name of the service that this endpoint provides.
    * @param endpoint Required. A endpoint with initial fields set.
    * @param endpointId Required. The Resource ID must be 1-63 characters long, and comply with &lt;a
@@ -708,6 +1239,18 @@ public final Endpoint createEndpoint(ServiceName parent, Endpoint endpoint, Stri
   /**
    * Creates a endpoint, and returns the new Endpoint.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   String parent =
+   *       ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]").toString();
+   *   Endpoint endpoint = Endpoint.newBuilder().build();
+   *   String endpointId = "endpointId-1837754992";
+   *   Endpoint response = registrationServiceClient.createEndpoint(parent, endpoint, endpointId);
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource name of the service that this endpoint provides.
    * @param endpoint Required. A endpoint with initial fields set.
    * @param endpointId Required. The Resource ID must be 1-63 characters long, and comply with &lt;a
@@ -732,6 +1275,21 @@ public final Endpoint createEndpoint(String parent, Endpoint endpoint, String en
   /**
    * Creates a endpoint, and returns the new Endpoint.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   CreateEndpointRequest request =
+   *       CreateEndpointRequest.newBuilder()
+   *           .setParent(
+   *               ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]").toString())
+   *           .setEndpointId("endpointId-1837754992")
+   *           .setEndpoint(Endpoint.newBuilder().build())
+   *           .build();
+   *   Endpoint response = registrationServiceClient.createEndpoint(request);
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -744,6 +1302,22 @@ public final Endpoint createEndpoint(CreateEndpointRequest request) {
    * Creates a endpoint, and returns the new Endpoint.
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   CreateEndpointRequest request =
+   *       CreateEndpointRequest.newBuilder()
+   *           .setParent(
+   *               ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]").toString())
+   *           .setEndpointId("endpointId-1837754992")
+   *           .setEndpoint(Endpoint.newBuilder().build())
+   *           .build();
+   *   ApiFuture<Endpoint> future =
+   *       registrationServiceClient.createEndpointCallable().futureCall(request);
+   *   // Do something.
+   *   Endpoint response = future.get();
+   * }
+   * }</pre>
    */
   public final UnaryCallable<CreateEndpointRequest, Endpoint> createEndpointCallable() {
     return stub.createEndpointCallable();
@@ -753,6 +1327,17 @@ public final UnaryCallable<CreateEndpointRequest, Endpoint> createEndpointCallab
   /**
    * Lists all endpoints.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   ServiceName parent = ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]");
+   *   for (Endpoint element : registrationServiceClient.listEndpoints(parent).iterateAll()) {
+   *     // doThingsWith(element);
+   *   }
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource name of the service whose endpoints we'd like to list.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -768,6 +1353,18 @@ public final ListEndpointsPagedResponse listEndpoints(ServiceName parent) {
   /**
    * Lists all endpoints.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   String parent =
+   *       ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]").toString();
+   *   for (Endpoint element : registrationServiceClient.listEndpoints(parent).iterateAll()) {
+   *     // doThingsWith(element);
+   *   }
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource name of the service whose endpoints we'd like to list.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -780,6 +1377,25 @@ public final ListEndpointsPagedResponse listEndpoints(String parent) {
   /**
    * Lists all endpoints.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   ListEndpointsRequest request =
+   *       ListEndpointsRequest.newBuilder()
+   *           .setParent(
+   *               ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]").toString())
+   *           .setPageSize(883849137)
+   *           .setPageToken("pageToken873572522")
+   *           .setFilter("filter-1274492040")
+   *           .setOrderBy("orderBy-1207110587")
+   *           .build();
+   *   for (Endpoint element : registrationServiceClient.listEndpoints(request).iterateAll()) {
+   *     // doThingsWith(element);
+   *   }
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -792,6 +1408,26 @@ public final ListEndpointsPagedResponse listEndpoints(ListEndpointsRequest reque
    * Lists all endpoints.
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   ListEndpointsRequest request =
+   *       ListEndpointsRequest.newBuilder()
+   *           .setParent(
+   *               ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]").toString())
+   *           .setPageSize(883849137)
+   *           .setPageToken("pageToken873572522")
+   *           .setFilter("filter-1274492040")
+   *           .setOrderBy("orderBy-1207110587")
+   *           .build();
+   *   ApiFuture<Endpoint> future =
+   *       registrationServiceClient.listEndpointsPagedCallable().futureCall(request);
+   *   // Do something.
+   *   for (Endpoint element : future.get().iterateAll()) {
+   *     // doThingsWith(element);
+   *   }
+   * }
+   * }</pre>
    */
   public final UnaryCallable<ListEndpointsRequest, ListEndpointsPagedResponse>
       listEndpointsPagedCallable() {
@@ -803,6 +1439,24 @@ public final ListEndpointsPagedResponse listEndpoints(ListEndpointsRequest reque
    * Lists all endpoints.
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   while (true) {
+   *     ListEndpointsResponse response =
+   *         registrationServiceClient.listEndpointsCallable().call(request);
+   *     for (Endpoint element : response.getResponsesList()) {
+   *       // doThingsWith(element);
+   *     }
+   *     String nextPageToken = response.getNextPageToken();
+   *     if (!Strings.isNullOrEmpty(nextPageToken)) {
+   *       request = request.toBuilder().setPageToken(nextPageToken).build();
+   *     } else {
+   *       break;
+   *     }
+   *   }
+   * }
+   * }</pre>
    */
   public final UnaryCallable<ListEndpointsRequest, ListEndpointsResponse> listEndpointsCallable() {
     return stub.listEndpointsCallable();
@@ -812,6 +1466,16 @@ public final UnaryCallable<ListEndpointsRequest, ListEndpointsResponse> listEndp
   /**
    * Gets a endpoint.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   EndpointName name =
+   *       EndpointName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]", "[ENDPOINT]");
+   *   Endpoint response = registrationServiceClient.getEndpoint(name);
+   * }
+   * }</pre>
+   *
    * @param name Required. The name of the endpoint to get.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -825,6 +1489,17 @@ public final Endpoint getEndpoint(EndpointName name) {
   /**
    * Gets a endpoint.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   String name =
+   *       EndpointName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]", "[ENDPOINT]")
+   *           .toString();
+   *   Endpoint response = registrationServiceClient.getEndpoint(name);
+   * }
+   * }</pre>
+   *
    * @param name Required. The name of the endpoint to get.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -837,6 +1512,21 @@ public final Endpoint getEndpoint(String name) {
   /**
    * Gets a endpoint.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   GetEndpointRequest request =
+   *       GetEndpointRequest.newBuilder()
+   *           .setName(
+   *               EndpointName.of(
+   *                       "[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]", "[ENDPOINT]")
+   *                   .toString())
+   *           .build();
+   *   Endpoint response = registrationServiceClient.getEndpoint(request);
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -849,6 +1539,22 @@ public final Endpoint getEndpoint(GetEndpointRequest request) {
    * Gets a endpoint.
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   GetEndpointRequest request =
+   *       GetEndpointRequest.newBuilder()
+   *           .setName(
+   *               EndpointName.of(
+   *                       "[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]", "[ENDPOINT]")
+   *                   .toString())
+   *           .build();
+   *   ApiFuture<Endpoint> future =
+   *       registrationServiceClient.getEndpointCallable().futureCall(request);
+   *   // Do something.
+   *   Endpoint response = future.get();
+   * }
+   * }</pre>
    */
   public final UnaryCallable<GetEndpointRequest, Endpoint> getEndpointCallable() {
     return stub.getEndpointCallable();
@@ -858,6 +1564,16 @@ public final UnaryCallable<GetEndpointRequest, Endpoint> getEndpointCallable() {
   /**
    * Updates a endpoint.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   Endpoint endpoint = Endpoint.newBuilder().build();
+   *   FieldMask updateMask = FieldMask.newBuilder().build();
+   *   Endpoint response = registrationServiceClient.updateEndpoint(endpoint, updateMask);
+   * }
+   * }</pre>
+   *
    * @param endpoint Required. The updated endpoint.
    * @param updateMask Required. List of fields to be updated in this request.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
@@ -872,6 +1588,19 @@ public final Endpoint updateEndpoint(Endpoint endpoint, FieldMask updateMask) {
   /**
    * Updates a endpoint.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   UpdateEndpointRequest request =
+   *       UpdateEndpointRequest.newBuilder()
+   *           .setEndpoint(Endpoint.newBuilder().build())
+   *           .setUpdateMask(FieldMask.newBuilder().build())
+   *           .build();
+   *   Endpoint response = registrationServiceClient.updateEndpoint(request);
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -884,6 +1613,20 @@ public final Endpoint updateEndpoint(UpdateEndpointRequest request) {
    * Updates a endpoint.
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   UpdateEndpointRequest request =
+   *       UpdateEndpointRequest.newBuilder()
+   *           .setEndpoint(Endpoint.newBuilder().build())
+   *           .setUpdateMask(FieldMask.newBuilder().build())
+   *           .build();
+   *   ApiFuture<Endpoint> future =
+   *       registrationServiceClient.updateEndpointCallable().futureCall(request);
+   *   // Do something.
+   *   Endpoint response = future.get();
+   * }
+   * }</pre>
    */
   public final UnaryCallable<UpdateEndpointRequest, Endpoint> updateEndpointCallable() {
     return stub.updateEndpointCallable();
@@ -893,6 +1636,16 @@ public final UnaryCallable<UpdateEndpointRequest, Endpoint> updateEndpointCallab
   /**
    * Deletes a endpoint.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   EndpointName name =
+   *       EndpointName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]", "[ENDPOINT]");
+   *   registrationServiceClient.deleteEndpoint(name);
+   * }
+   * }</pre>
+   *
    * @param name Required. The name of the endpoint to delete.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -906,6 +1659,17 @@ public final void deleteEndpoint(EndpointName name) {
   /**
    * Deletes a endpoint.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   String name =
+   *       EndpointName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]", "[ENDPOINT]")
+   *           .toString();
+   *   registrationServiceClient.deleteEndpoint(name);
+   * }
+   * }</pre>
+   *
    * @param name Required. The name of the endpoint to delete.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -918,6 +1682,21 @@ public final void deleteEndpoint(String name) {
   /**
    * Deletes a endpoint.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   DeleteEndpointRequest request =
+   *       DeleteEndpointRequest.newBuilder()
+   *           .setName(
+   *               EndpointName.of(
+   *                       "[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]", "[ENDPOINT]")
+   *                   .toString())
+   *           .build();
+   *   registrationServiceClient.deleteEndpoint(request);
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -930,6 +1709,22 @@ public final void deleteEndpoint(DeleteEndpointRequest request) {
    * Deletes a endpoint.
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   DeleteEndpointRequest request =
+   *       DeleteEndpointRequest.newBuilder()
+   *           .setName(
+   *               EndpointName.of(
+   *                       "[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]", "[ENDPOINT]")
+   *                   .toString())
+   *           .build();
+   *   ApiFuture<Empty> future =
+   *       registrationServiceClient.deleteEndpointCallable().futureCall(request);
+   *   // Do something.
+   *   future.get();
+   * }
+   * }</pre>
    */
   public final UnaryCallable<DeleteEndpointRequest, Empty> deleteEndpointCallable() {
     return stub.deleteEndpointCallable();
@@ -939,6 +1734,20 @@ public final UnaryCallable<DeleteEndpointRequest, Empty> deleteEndpointCallable(
   /**
    * Gets the IAM Policy for a resource (namespace or service only).
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   GetIamPolicyRequest request =
+   *       GetIamPolicyRequest.newBuilder()
+   *           .setResource(
+   *               ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]").toString())
+   *           .setOptions(GetPolicyOptions.newBuilder().build())
+   *           .build();
+   *   Policy response = registrationServiceClient.getIamPolicy(request);
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -951,6 +1760,21 @@ public final Policy getIamPolicy(GetIamPolicyRequest request) {
    * Gets the IAM Policy for a resource (namespace or service only).
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   GetIamPolicyRequest request =
+   *       GetIamPolicyRequest.newBuilder()
+   *           .setResource(
+   *               ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]").toString())
+   *           .setOptions(GetPolicyOptions.newBuilder().build())
+   *           .build();
+   *   ApiFuture<Policy> future =
+   *       registrationServiceClient.getIamPolicyCallable().futureCall(request);
+   *   // Do something.
+   *   Policy response = future.get();
+   * }
+   * }</pre>
    */
   public final UnaryCallable<GetIamPolicyRequest, Policy> getIamPolicyCallable() {
     return stub.getIamPolicyCallable();
@@ -960,6 +1784,20 @@ public final UnaryCallable<GetIamPolicyRequest, Policy> getIamPolicyCallable() {
   /**
    * Sets the IAM Policy for a resource (namespace or service only).
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   SetIamPolicyRequest request =
+   *       SetIamPolicyRequest.newBuilder()
+   *           .setResource(
+   *               ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]").toString())
+   *           .setPolicy(Policy.newBuilder().build())
+   *           .build();
+   *   Policy response = registrationServiceClient.setIamPolicy(request);
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -972,6 +1810,21 @@ public final Policy setIamPolicy(SetIamPolicyRequest request) {
    * Sets the IAM Policy for a resource (namespace or service only).
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   SetIamPolicyRequest request =
+   *       SetIamPolicyRequest.newBuilder()
+   *           .setResource(
+   *               ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]").toString())
+   *           .setPolicy(Policy.newBuilder().build())
+   *           .build();
+   *   ApiFuture<Policy> future =
+   *       registrationServiceClient.setIamPolicyCallable().futureCall(request);
+   *   // Do something.
+   *   Policy response = future.get();
+   * }
+   * }</pre>
    */
   public final UnaryCallable<SetIamPolicyRequest, Policy> setIamPolicyCallable() {
     return stub.setIamPolicyCallable();
@@ -981,6 +1834,20 @@ public final UnaryCallable<SetIamPolicyRequest, Policy> setIamPolicyCallable() {
   /**
    * Tests IAM permissions for a resource (namespace or service only).
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   TestIamPermissionsRequest request =
+   *       TestIamPermissionsRequest.newBuilder()
+   *           .setResource(
+   *               ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]").toString())
+   *           .addAllPermissions(new ArrayList<String>())
+   *           .build();
+   *   TestIamPermissionsResponse response = registrationServiceClient.testIamPermissions(request);
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -993,6 +1860,21 @@ public final TestIamPermissionsResponse testIamPermissions(TestIamPermissionsReq
    * Tests IAM permissions for a resource (namespace or service only).
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   TestIamPermissionsRequest request =
+   *       TestIamPermissionsRequest.newBuilder()
+   *           .setResource(
+   *               ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]").toString())
+   *           .addAllPermissions(new ArrayList<String>())
+   *           .build();
+   *   ApiFuture<TestIamPermissionsResponse> future =
+   *       registrationServiceClient.testIamPermissionsCallable().futureCall(request);
+   *   // Do something.
+   *   TestIamPermissionsResponse response = future.get();
+   * }
+   * }</pre>
    */
   public final UnaryCallable<TestIamPermissionsRequest, TestIamPermissionsResponse>
       testIamPermissionsCallable() {
diff --git a/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1/package-info.java b/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1/package-info.java
index 2336e026..f2a06c86 100644
--- a/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1/package-info.java
+++ b/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1/package-info.java
@@ -23,6 +23,19 @@
  *
  * <p>Sample for LookupServiceClient:
  *
+ * <pre>{@code
+ * try (LookupServiceClient lookupServiceClient = LookupServiceClient.create()) {
+ *   ResolveServiceRequest request =
+ *       ResolveServiceRequest.newBuilder()
+ *           .setName(
+ *               ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]").toString())
+ *           .setMaxEndpoints(2074789987)
+ *           .setEndpointFilter("endpointFilter-1834249875")
+ *           .build();
+ *   ResolveServiceResponse response = lookupServiceClient.resolveService(request);
+ * }
+ * }</pre>
+ *
  * <p>======================= RegistrationServiceClient =======================
  *
  * <p>Service Description: Service Directory API for registering services. It defines the following
@@ -39,6 +52,16 @@
  * `projects/&#42;/locations/&#42;/namespaces/&#42;/services/&#42;/endpoints/&#42;`.
  *
  * <p>Sample for RegistrationServiceClient:
+ *
+ * <pre>{@code
+ * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+ *   LocationName parent = LocationName.of("[PROJECT]", "[LOCATION]");
+ *   Namespace namespace = Namespace.newBuilder().build();
+ *   String namespaceId = "namespaceId790852566";
+ *   Namespace response =
+ *       registrationServiceClient.createNamespace(parent, namespace, namespaceId);
+ * }
+ * }</pre>
  */
 @Generated("by gapic-generator-java")
 package com.google.cloud.servicedirectory.v1;
diff --git a/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1/stub/GrpcLookupServiceStub.java b/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1/stub/GrpcLookupServiceStub.java
index 9f2e7c03..1c54778b 100644
--- a/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1/stub/GrpcLookupServiceStub.java
+++ b/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1/stub/GrpcLookupServiceStub.java
@@ -124,6 +124,7 @@ public GrpcOperationsStub getOperationsStub() {
     return operationsStub;
   }
 
+  @Override
   public UnaryCallable<ResolveServiceRequest, ResolveServiceResponse> resolveServiceCallable() {
     return resolveServiceCallable;
   }
diff --git a/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1/stub/GrpcRegistrationServiceStub.java b/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1/stub/GrpcRegistrationServiceStub.java
index 45fcc2a2..670ed7f8 100644
--- a/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1/stub/GrpcRegistrationServiceStub.java
+++ b/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1/stub/GrpcRegistrationServiceStub.java
@@ -637,88 +637,109 @@ public GrpcOperationsStub getOperationsStub() {
     return operationsStub;
   }
 
+  @Override
   public UnaryCallable<CreateNamespaceRequest, Namespace> createNamespaceCallable() {
     return createNamespaceCallable;
   }
 
+  @Override
   public UnaryCallable<ListNamespacesRequest, ListNamespacesResponse> listNamespacesCallable() {
     return listNamespacesCallable;
   }
 
+  @Override
   public UnaryCallable<ListNamespacesRequest, ListNamespacesPagedResponse>
       listNamespacesPagedCallable() {
     return listNamespacesPagedCallable;
   }
 
+  @Override
   public UnaryCallable<GetNamespaceRequest, Namespace> getNamespaceCallable() {
     return getNamespaceCallable;
   }
 
+  @Override
   public UnaryCallable<UpdateNamespaceRequest, Namespace> updateNamespaceCallable() {
     return updateNamespaceCallable;
   }
 
+  @Override
   public UnaryCallable<DeleteNamespaceRequest, Empty> deleteNamespaceCallable() {
     return deleteNamespaceCallable;
   }
 
+  @Override
   public UnaryCallable<CreateServiceRequest, Service> createServiceCallable() {
     return createServiceCallable;
   }
 
+  @Override
   public UnaryCallable<ListServicesRequest, ListServicesResponse> listServicesCallable() {
     return listServicesCallable;
   }
 
+  @Override
   public UnaryCallable<ListServicesRequest, ListServicesPagedResponse> listServicesPagedCallable() {
     return listServicesPagedCallable;
   }
 
+  @Override
   public UnaryCallable<GetServiceRequest, Service> getServiceCallable() {
     return getServiceCallable;
   }
 
+  @Override
   public UnaryCallable<UpdateServiceRequest, Service> updateServiceCallable() {
     return updateServiceCallable;
   }
 
+  @Override
   public UnaryCallable<DeleteServiceRequest, Empty> deleteServiceCallable() {
     return deleteServiceCallable;
   }
 
+  @Override
   public UnaryCallable<CreateEndpointRequest, Endpoint> createEndpointCallable() {
     return createEndpointCallable;
   }
 
+  @Override
   public UnaryCallable<ListEndpointsRequest, ListEndpointsResponse> listEndpointsCallable() {
     return listEndpointsCallable;
   }
 
+  @Override
   public UnaryCallable<ListEndpointsRequest, ListEndpointsPagedResponse>
       listEndpointsPagedCallable() {
     return listEndpointsPagedCallable;
   }
 
+  @Override
   public UnaryCallable<GetEndpointRequest, Endpoint> getEndpointCallable() {
     return getEndpointCallable;
   }
 
+  @Override
   public UnaryCallable<UpdateEndpointRequest, Endpoint> updateEndpointCallable() {
     return updateEndpointCallable;
   }
 
+  @Override
   public UnaryCallable<DeleteEndpointRequest, Empty> deleteEndpointCallable() {
     return deleteEndpointCallable;
   }
 
+  @Override
   public UnaryCallable<GetIamPolicyRequest, Policy> getIamPolicyCallable() {
     return getIamPolicyCallable;
   }
 
+  @Override
   public UnaryCallable<SetIamPolicyRequest, Policy> setIamPolicyCallable() {
     return setIamPolicyCallable;
   }
 
+  @Override
   public UnaryCallable<TestIamPermissionsRequest, TestIamPermissionsResponse>
       testIamPermissionsCallable() {
     return testIamPermissionsCallable;
diff --git a/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1beta1/LookupServiceClient.java b/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1beta1/LookupServiceClient.java
index 1a6f1196..aa382f4f 100644
--- a/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1beta1/LookupServiceClient.java
+++ b/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1beta1/LookupServiceClient.java
@@ -32,6 +32,19 @@
  * <p>This class provides the ability to make remote calls to the backing service through method
  * calls that map to API methods. Sample code to get started:
  *
+ * <pre>{@code
+ * try (LookupServiceClient lookupServiceClient = LookupServiceClient.create()) {
+ *   ResolveServiceRequest request =
+ *       ResolveServiceRequest.newBuilder()
+ *           .setName(
+ *               ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]").toString())
+ *           .setMaxEndpoints(2074789987)
+ *           .setEndpointFilter("endpointFilter-1834249875")
+ *           .build();
+ *   ResolveServiceResponse response = lookupServiceClient.resolveService(request);
+ * }
+ * }</pre>
+ *
  * <p>Note: close() needs to be called on the LookupServiceClient object to clean up resources such
  * as threads. In the example above, try-with-resources is used, which automatically calls close().
  *
@@ -137,6 +150,21 @@ public LookupServiceStub getStub() {
    * Returns a [service][google.cloud.servicedirectory.v1beta1.Service] and its associated
    * endpoints. Resolving a service is not considered an active developer method.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (LookupServiceClient lookupServiceClient = LookupServiceClient.create()) {
+   *   ResolveServiceRequest request =
+   *       ResolveServiceRequest.newBuilder()
+   *           .setName(
+   *               ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]").toString())
+   *           .setMaxEndpoints(2074789987)
+   *           .setEndpointFilter("endpointFilter-1834249875")
+   *           .build();
+   *   ResolveServiceResponse response = lookupServiceClient.resolveService(request);
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -150,6 +178,22 @@ public final ResolveServiceResponse resolveService(ResolveServiceRequest request
    * endpoints. Resolving a service is not considered an active developer method.
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (LookupServiceClient lookupServiceClient = LookupServiceClient.create()) {
+   *   ResolveServiceRequest request =
+   *       ResolveServiceRequest.newBuilder()
+   *           .setName(
+   *               ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]").toString())
+   *           .setMaxEndpoints(2074789987)
+   *           .setEndpointFilter("endpointFilter-1834249875")
+   *           .build();
+   *   ApiFuture<ResolveServiceResponse> future =
+   *       lookupServiceClient.resolveServiceCallable().futureCall(request);
+   *   // Do something.
+   *   ResolveServiceResponse response = future.get();
+   * }
+   * }</pre>
    */
   public final UnaryCallable<ResolveServiceRequest, ResolveServiceResponse>
       resolveServiceCallable() {
diff --git a/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1beta1/RegistrationServiceClient.java b/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1beta1/RegistrationServiceClient.java
index c0eb4dbb..f488c21e 100644
--- a/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1beta1/RegistrationServiceClient.java
+++ b/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1beta1/RegistrationServiceClient.java
@@ -59,6 +59,16 @@
  * <p>This class provides the ability to make remote calls to the backing service through method
  * calls that map to API methods. Sample code to get started:
  *
+ * <pre>{@code
+ * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+ *   LocationName parent = LocationName.of("[PROJECT]", "[LOCATION]");
+ *   Namespace namespace = Namespace.newBuilder().build();
+ *   String namespaceId = "namespaceId790852566";
+ *   Namespace response =
+ *       registrationServiceClient.createNamespace(parent, namespace, namespaceId);
+ * }
+ * }</pre>
+ *
  * <p>Note: close() needs to be called on the RegistrationServiceClient object to clean up resources
  * such as threads. In the example above, try-with-resources is used, which automatically calls
  * close().
@@ -166,6 +176,18 @@ public RegistrationServiceStub getStub() {
   /**
    * Creates a namespace, and returns the new Namespace.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   LocationName parent = LocationName.of("[PROJECT]", "[LOCATION]");
+   *   Namespace namespace = Namespace.newBuilder().build();
+   *   String namespaceId = "namespaceId790852566";
+   *   Namespace response =
+   *       registrationServiceClient.createNamespace(parent, namespace, namespaceId);
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource name of the project and location the namespace will be
    *     created in.
    * @param namespace Required. A namespace with initial fields set.
@@ -192,6 +214,18 @@ public final Namespace createNamespace(
   /**
    * Creates a namespace, and returns the new Namespace.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   String parent = LocationName.of("[PROJECT]", "[LOCATION]").toString();
+   *   Namespace namespace = Namespace.newBuilder().build();
+   *   String namespaceId = "namespaceId790852566";
+   *   Namespace response =
+   *       registrationServiceClient.createNamespace(parent, namespace, namespaceId);
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource name of the project and location the namespace will be
    *     created in.
    * @param namespace Required. A namespace with initial fields set.
@@ -217,6 +251,20 @@ public final Namespace createNamespace(String parent, Namespace namespace, Strin
   /**
    * Creates a namespace, and returns the new Namespace.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   CreateNamespaceRequest request =
+   *       CreateNamespaceRequest.newBuilder()
+   *           .setParent(LocationName.of("[PROJECT]", "[LOCATION]").toString())
+   *           .setNamespaceId("namespaceId790852566")
+   *           .setNamespace(Namespace.newBuilder().build())
+   *           .build();
+   *   Namespace response = registrationServiceClient.createNamespace(request);
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -229,6 +277,21 @@ public final Namespace createNamespace(CreateNamespaceRequest request) {
    * Creates a namespace, and returns the new Namespace.
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   CreateNamespaceRequest request =
+   *       CreateNamespaceRequest.newBuilder()
+   *           .setParent(LocationName.of("[PROJECT]", "[LOCATION]").toString())
+   *           .setNamespaceId("namespaceId790852566")
+   *           .setNamespace(Namespace.newBuilder().build())
+   *           .build();
+   *   ApiFuture<Namespace> future =
+   *       registrationServiceClient.createNamespaceCallable().futureCall(request);
+   *   // Do something.
+   *   Namespace response = future.get();
+   * }
+   * }</pre>
    */
   public final UnaryCallable<CreateNamespaceRequest, Namespace> createNamespaceCallable() {
     return stub.createNamespaceCallable();
@@ -238,6 +301,17 @@ public final UnaryCallable<CreateNamespaceRequest, Namespace> createNamespaceCal
   /**
    * Lists all namespaces.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   LocationName parent = LocationName.of("[PROJECT]", "[LOCATION]");
+   *   for (Namespace element : registrationServiceClient.listNamespaces(parent).iterateAll()) {
+   *     // doThingsWith(element);
+   *   }
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource name of the project and location whose namespaces we'd
    *     like to list.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
@@ -254,6 +328,17 @@ public final ListNamespacesPagedResponse listNamespaces(LocationName parent) {
   /**
    * Lists all namespaces.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   String parent = LocationName.of("[PROJECT]", "[LOCATION]").toString();
+   *   for (Namespace element : registrationServiceClient.listNamespaces(parent).iterateAll()) {
+   *     // doThingsWith(element);
+   *   }
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource name of the project and location whose namespaces we'd
    *     like to list.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
@@ -267,6 +352,24 @@ public final ListNamespacesPagedResponse listNamespaces(String parent) {
   /**
    * Lists all namespaces.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   ListNamespacesRequest request =
+   *       ListNamespacesRequest.newBuilder()
+   *           .setParent(LocationName.of("[PROJECT]", "[LOCATION]").toString())
+   *           .setPageSize(883849137)
+   *           .setPageToken("pageToken873572522")
+   *           .setFilter("filter-1274492040")
+   *           .setOrderBy("orderBy-1207110587")
+   *           .build();
+   *   for (Namespace element : registrationServiceClient.listNamespaces(request).iterateAll()) {
+   *     // doThingsWith(element);
+   *   }
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -279,6 +382,25 @@ public final ListNamespacesPagedResponse listNamespaces(ListNamespacesRequest re
    * Lists all namespaces.
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   ListNamespacesRequest request =
+   *       ListNamespacesRequest.newBuilder()
+   *           .setParent(LocationName.of("[PROJECT]", "[LOCATION]").toString())
+   *           .setPageSize(883849137)
+   *           .setPageToken("pageToken873572522")
+   *           .setFilter("filter-1274492040")
+   *           .setOrderBy("orderBy-1207110587")
+   *           .build();
+   *   ApiFuture<Namespace> future =
+   *       registrationServiceClient.listNamespacesPagedCallable().futureCall(request);
+   *   // Do something.
+   *   for (Namespace element : future.get().iterateAll()) {
+   *     // doThingsWith(element);
+   *   }
+   * }
+   * }</pre>
    */
   public final UnaryCallable<ListNamespacesRequest, ListNamespacesPagedResponse>
       listNamespacesPagedCallable() {
@@ -290,6 +412,24 @@ public final ListNamespacesPagedResponse listNamespaces(ListNamespacesRequest re
    * Lists all namespaces.
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   while (true) {
+   *     ListNamespacesResponse response =
+   *         registrationServiceClient.listNamespacesCallable().call(request);
+   *     for (Namespace element : response.getResponsesList()) {
+   *       // doThingsWith(element);
+   *     }
+   *     String nextPageToken = response.getNextPageToken();
+   *     if (!Strings.isNullOrEmpty(nextPageToken)) {
+   *       request = request.toBuilder().setPageToken(nextPageToken).build();
+   *     } else {
+   *       break;
+   *     }
+   *   }
+   * }
+   * }</pre>
    */
   public final UnaryCallable<ListNamespacesRequest, ListNamespacesResponse>
       listNamespacesCallable() {
@@ -300,6 +440,15 @@ public final ListNamespacesPagedResponse listNamespaces(ListNamespacesRequest re
   /**
    * Gets a namespace.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   NamespaceName name = NamespaceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]");
+   *   Namespace response = registrationServiceClient.getNamespace(name);
+   * }
+   * }</pre>
+   *
    * @param name Required. The name of the namespace to retrieve.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -313,6 +462,15 @@ public final Namespace getNamespace(NamespaceName name) {
   /**
    * Gets a namespace.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   String name = NamespaceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]").toString();
+   *   Namespace response = registrationServiceClient.getNamespace(name);
+   * }
+   * }</pre>
+   *
    * @param name Required. The name of the namespace to retrieve.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -325,6 +483,18 @@ public final Namespace getNamespace(String name) {
   /**
    * Gets a namespace.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   GetNamespaceRequest request =
+   *       GetNamespaceRequest.newBuilder()
+   *           .setName(NamespaceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]").toString())
+   *           .build();
+   *   Namespace response = registrationServiceClient.getNamespace(request);
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -337,6 +507,19 @@ public final Namespace getNamespace(GetNamespaceRequest request) {
    * Gets a namespace.
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   GetNamespaceRequest request =
+   *       GetNamespaceRequest.newBuilder()
+   *           .setName(NamespaceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]").toString())
+   *           .build();
+   *   ApiFuture<Namespace> future =
+   *       registrationServiceClient.getNamespaceCallable().futureCall(request);
+   *   // Do something.
+   *   Namespace response = future.get();
+   * }
+   * }</pre>
    */
   public final UnaryCallable<GetNamespaceRequest, Namespace> getNamespaceCallable() {
     return stub.getNamespaceCallable();
@@ -346,6 +529,16 @@ public final UnaryCallable<GetNamespaceRequest, Namespace> getNamespaceCallable(
   /**
    * Updates a namespace.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   Namespace namespace = Namespace.newBuilder().build();
+   *   FieldMask updateMask = FieldMask.newBuilder().build();
+   *   Namespace response = registrationServiceClient.updateNamespace(namespace, updateMask);
+   * }
+   * }</pre>
+   *
    * @param namespace Required. The updated namespace.
    * @param updateMask Required. List of fields to be updated in this request.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
@@ -363,6 +556,19 @@ public final Namespace updateNamespace(Namespace namespace, FieldMask updateMask
   /**
    * Updates a namespace.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   UpdateNamespaceRequest request =
+   *       UpdateNamespaceRequest.newBuilder()
+   *           .setNamespace(Namespace.newBuilder().build())
+   *           .setUpdateMask(FieldMask.newBuilder().build())
+   *           .build();
+   *   Namespace response = registrationServiceClient.updateNamespace(request);
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -375,6 +581,20 @@ public final Namespace updateNamespace(UpdateNamespaceRequest request) {
    * Updates a namespace.
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   UpdateNamespaceRequest request =
+   *       UpdateNamespaceRequest.newBuilder()
+   *           .setNamespace(Namespace.newBuilder().build())
+   *           .setUpdateMask(FieldMask.newBuilder().build())
+   *           .build();
+   *   ApiFuture<Namespace> future =
+   *       registrationServiceClient.updateNamespaceCallable().futureCall(request);
+   *   // Do something.
+   *   Namespace response = future.get();
+   * }
+   * }</pre>
    */
   public final UnaryCallable<UpdateNamespaceRequest, Namespace> updateNamespaceCallable() {
     return stub.updateNamespaceCallable();
@@ -384,6 +604,15 @@ public final UnaryCallable<UpdateNamespaceRequest, Namespace> updateNamespaceCal
   /**
    * Deletes a namespace. This also deletes all services and endpoints in the namespace.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   NamespaceName name = NamespaceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]");
+   *   registrationServiceClient.deleteNamespace(name);
+   * }
+   * }</pre>
+   *
    * @param name Required. The name of the namespace to delete.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -397,6 +626,15 @@ public final void deleteNamespace(NamespaceName name) {
   /**
    * Deletes a namespace. This also deletes all services and endpoints in the namespace.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   String name = NamespaceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]").toString();
+   *   registrationServiceClient.deleteNamespace(name);
+   * }
+   * }</pre>
+   *
    * @param name Required. The name of the namespace to delete.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -409,6 +647,18 @@ public final void deleteNamespace(String name) {
   /**
    * Deletes a namespace. This also deletes all services and endpoints in the namespace.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   DeleteNamespaceRequest request =
+   *       DeleteNamespaceRequest.newBuilder()
+   *           .setName(NamespaceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]").toString())
+   *           .build();
+   *   registrationServiceClient.deleteNamespace(request);
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -421,6 +671,19 @@ public final void deleteNamespace(DeleteNamespaceRequest request) {
    * Deletes a namespace. This also deletes all services and endpoints in the namespace.
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   DeleteNamespaceRequest request =
+   *       DeleteNamespaceRequest.newBuilder()
+   *           .setName(NamespaceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]").toString())
+   *           .build();
+   *   ApiFuture<Empty> future =
+   *       registrationServiceClient.deleteNamespaceCallable().futureCall(request);
+   *   // Do something.
+   *   future.get();
+   * }
+   * }</pre>
    */
   public final UnaryCallable<DeleteNamespaceRequest, Empty> deleteNamespaceCallable() {
     return stub.deleteNamespaceCallable();
@@ -430,6 +693,17 @@ public final UnaryCallable<DeleteNamespaceRequest, Empty> deleteNamespaceCallabl
   /**
    * Creates a service, and returns the new Service.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   NamespaceName parent = NamespaceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]");
+   *   Service service = Service.newBuilder().build();
+   *   String serviceId = "serviceId-194185552";
+   *   Service response = registrationServiceClient.createService(parent, service, serviceId);
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource name of the namespace this service will belong to.
    * @param service Required. A service with initial fields set.
    * @param serviceId Required. The Resource ID must be 1-63 characters long, and comply with &lt;a
@@ -454,6 +728,17 @@ public final Service createService(NamespaceName parent, Service service, String
   /**
    * Creates a service, and returns the new Service.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   String parent = NamespaceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]").toString();
+   *   Service service = Service.newBuilder().build();
+   *   String serviceId = "serviceId-194185552";
+   *   Service response = registrationServiceClient.createService(parent, service, serviceId);
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource name of the namespace this service will belong to.
    * @param service Required. A service with initial fields set.
    * @param serviceId Required. The Resource ID must be 1-63 characters long, and comply with &lt;a
@@ -478,6 +763,20 @@ public final Service createService(String parent, Service service, String servic
   /**
    * Creates a service, and returns the new Service.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   CreateServiceRequest request =
+   *       CreateServiceRequest.newBuilder()
+   *           .setParent(NamespaceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]").toString())
+   *           .setServiceId("serviceId-194185552")
+   *           .setService(Service.newBuilder().build())
+   *           .build();
+   *   Service response = registrationServiceClient.createService(request);
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -490,6 +789,21 @@ public final Service createService(CreateServiceRequest request) {
    * Creates a service, and returns the new Service.
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   CreateServiceRequest request =
+   *       CreateServiceRequest.newBuilder()
+   *           .setParent(NamespaceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]").toString())
+   *           .setServiceId("serviceId-194185552")
+   *           .setService(Service.newBuilder().build())
+   *           .build();
+   *   ApiFuture<Service> future =
+   *       registrationServiceClient.createServiceCallable().futureCall(request);
+   *   // Do something.
+   *   Service response = future.get();
+   * }
+   * }</pre>
    */
   public final UnaryCallable<CreateServiceRequest, Service> createServiceCallable() {
     return stub.createServiceCallable();
@@ -499,6 +813,17 @@ public final UnaryCallable<CreateServiceRequest, Service> createServiceCallable(
   /**
    * Lists all services belonging to a namespace.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   NamespaceName parent = NamespaceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]");
+   *   for (Service element : registrationServiceClient.listServices(parent).iterateAll()) {
+   *     // doThingsWith(element);
+   *   }
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource name of the namespace whose services we'd like to list.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -514,6 +839,17 @@ public final ListServicesPagedResponse listServices(NamespaceName parent) {
   /**
    * Lists all services belonging to a namespace.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   String parent = NamespaceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]").toString();
+   *   for (Service element : registrationServiceClient.listServices(parent).iterateAll()) {
+   *     // doThingsWith(element);
+   *   }
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource name of the namespace whose services we'd like to list.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -526,6 +862,24 @@ public final ListServicesPagedResponse listServices(String parent) {
   /**
    * Lists all services belonging to a namespace.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   ListServicesRequest request =
+   *       ListServicesRequest.newBuilder()
+   *           .setParent(NamespaceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]").toString())
+   *           .setPageSize(883849137)
+   *           .setPageToken("pageToken873572522")
+   *           .setFilter("filter-1274492040")
+   *           .setOrderBy("orderBy-1207110587")
+   *           .build();
+   *   for (Service element : registrationServiceClient.listServices(request).iterateAll()) {
+   *     // doThingsWith(element);
+   *   }
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -538,6 +892,25 @@ public final ListServicesPagedResponse listServices(ListServicesRequest request)
    * Lists all services belonging to a namespace.
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   ListServicesRequest request =
+   *       ListServicesRequest.newBuilder()
+   *           .setParent(NamespaceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]").toString())
+   *           .setPageSize(883849137)
+   *           .setPageToken("pageToken873572522")
+   *           .setFilter("filter-1274492040")
+   *           .setOrderBy("orderBy-1207110587")
+   *           .build();
+   *   ApiFuture<Service> future =
+   *       registrationServiceClient.listServicesPagedCallable().futureCall(request);
+   *   // Do something.
+   *   for (Service element : future.get().iterateAll()) {
+   *     // doThingsWith(element);
+   *   }
+   * }
+   * }</pre>
    */
   public final UnaryCallable<ListServicesRequest, ListServicesPagedResponse>
       listServicesPagedCallable() {
@@ -549,6 +922,24 @@ public final ListServicesPagedResponse listServices(ListServicesRequest request)
    * Lists all services belonging to a namespace.
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   while (true) {
+   *     ListServicesResponse response =
+   *         registrationServiceClient.listServicesCallable().call(request);
+   *     for (Service element : response.getResponsesList()) {
+   *       // doThingsWith(element);
+   *     }
+   *     String nextPageToken = response.getNextPageToken();
+   *     if (!Strings.isNullOrEmpty(nextPageToken)) {
+   *       request = request.toBuilder().setPageToken(nextPageToken).build();
+   *     } else {
+   *       break;
+   *     }
+   *   }
+   * }
+   * }</pre>
    */
   public final UnaryCallable<ListServicesRequest, ListServicesResponse> listServicesCallable() {
     return stub.listServicesCallable();
@@ -558,6 +949,15 @@ public final UnaryCallable<ListServicesRequest, ListServicesResponse> listServic
   /**
    * Gets a service.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   ServiceName name = ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]");
+   *   Service response = registrationServiceClient.getService(name);
+   * }
+   * }</pre>
+   *
    * @param name Required. The name of the service to get.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -571,6 +971,16 @@ public final Service getService(ServiceName name) {
   /**
    * Gets a service.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   String name =
+   *       ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]").toString();
+   *   Service response = registrationServiceClient.getService(name);
+   * }
+   * }</pre>
+   *
    * @param name Required. The name of the service to get.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -583,6 +993,19 @@ public final Service getService(String name) {
   /**
    * Gets a service.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   GetServiceRequest request =
+   *       GetServiceRequest.newBuilder()
+   *           .setName(
+   *               ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]").toString())
+   *           .build();
+   *   Service response = registrationServiceClient.getService(request);
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -595,6 +1018,20 @@ public final Service getService(GetServiceRequest request) {
    * Gets a service.
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   GetServiceRequest request =
+   *       GetServiceRequest.newBuilder()
+   *           .setName(
+   *               ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]").toString())
+   *           .build();
+   *   ApiFuture<Service> future =
+   *       registrationServiceClient.getServiceCallable().futureCall(request);
+   *   // Do something.
+   *   Service response = future.get();
+   * }
+   * }</pre>
    */
   public final UnaryCallable<GetServiceRequest, Service> getServiceCallable() {
     return stub.getServiceCallable();
@@ -604,6 +1041,16 @@ public final UnaryCallable<GetServiceRequest, Service> getServiceCallable() {
   /**
    * Updates a service.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   Service service = Service.newBuilder().build();
+   *   FieldMask updateMask = FieldMask.newBuilder().build();
+   *   Service response = registrationServiceClient.updateService(service, updateMask);
+   * }
+   * }</pre>
+   *
    * @param service Required. The updated service.
    * @param updateMask Required. List of fields to be updated in this request.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
@@ -618,6 +1065,19 @@ public final Service updateService(Service service, FieldMask updateMask) {
   /**
    * Updates a service.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   UpdateServiceRequest request =
+   *       UpdateServiceRequest.newBuilder()
+   *           .setService(Service.newBuilder().build())
+   *           .setUpdateMask(FieldMask.newBuilder().build())
+   *           .build();
+   *   Service response = registrationServiceClient.updateService(request);
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -630,6 +1090,20 @@ public final Service updateService(UpdateServiceRequest request) {
    * Updates a service.
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   UpdateServiceRequest request =
+   *       UpdateServiceRequest.newBuilder()
+   *           .setService(Service.newBuilder().build())
+   *           .setUpdateMask(FieldMask.newBuilder().build())
+   *           .build();
+   *   ApiFuture<Service> future =
+   *       registrationServiceClient.updateServiceCallable().futureCall(request);
+   *   // Do something.
+   *   Service response = future.get();
+   * }
+   * }</pre>
    */
   public final UnaryCallable<UpdateServiceRequest, Service> updateServiceCallable() {
     return stub.updateServiceCallable();
@@ -639,6 +1113,15 @@ public final UnaryCallable<UpdateServiceRequest, Service> updateServiceCallable(
   /**
    * Deletes a service. This also deletes all endpoints associated with the service.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   ServiceName name = ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]");
+   *   registrationServiceClient.deleteService(name);
+   * }
+   * }</pre>
+   *
    * @param name Required. The name of the service to delete.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -652,6 +1135,16 @@ public final void deleteService(ServiceName name) {
   /**
    * Deletes a service. This also deletes all endpoints associated with the service.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   String name =
+   *       ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]").toString();
+   *   registrationServiceClient.deleteService(name);
+   * }
+   * }</pre>
+   *
    * @param name Required. The name of the service to delete.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -664,6 +1157,19 @@ public final void deleteService(String name) {
   /**
    * Deletes a service. This also deletes all endpoints associated with the service.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   DeleteServiceRequest request =
+   *       DeleteServiceRequest.newBuilder()
+   *           .setName(
+   *               ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]").toString())
+   *           .build();
+   *   registrationServiceClient.deleteService(request);
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -676,6 +1182,20 @@ public final void deleteService(DeleteServiceRequest request) {
    * Deletes a service. This also deletes all endpoints associated with the service.
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   DeleteServiceRequest request =
+   *       DeleteServiceRequest.newBuilder()
+   *           .setName(
+   *               ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]").toString())
+   *           .build();
+   *   ApiFuture<Empty> future =
+   *       registrationServiceClient.deleteServiceCallable().futureCall(request);
+   *   // Do something.
+   *   future.get();
+   * }
+   * }</pre>
    */
   public final UnaryCallable<DeleteServiceRequest, Empty> deleteServiceCallable() {
     return stub.deleteServiceCallable();
@@ -685,6 +1205,17 @@ public final UnaryCallable<DeleteServiceRequest, Empty> deleteServiceCallable()
   /**
    * Creates a endpoint, and returns the new Endpoint.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   ServiceName parent = ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]");
+   *   Endpoint endpoint = Endpoint.newBuilder().build();
+   *   String endpointId = "endpointId-1837754992";
+   *   Endpoint response = registrationServiceClient.createEndpoint(parent, endpoint, endpointId);
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource name of the service that this endpoint provides.
    * @param endpoint Required. A endpoint with initial fields set.
    * @param endpointId Required. The Resource ID must be 1-63 characters long, and comply with &lt;a
@@ -709,6 +1240,18 @@ public final Endpoint createEndpoint(ServiceName parent, Endpoint endpoint, Stri
   /**
    * Creates a endpoint, and returns the new Endpoint.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   String parent =
+   *       ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]").toString();
+   *   Endpoint endpoint = Endpoint.newBuilder().build();
+   *   String endpointId = "endpointId-1837754992";
+   *   Endpoint response = registrationServiceClient.createEndpoint(parent, endpoint, endpointId);
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource name of the service that this endpoint provides.
    * @param endpoint Required. A endpoint with initial fields set.
    * @param endpointId Required. The Resource ID must be 1-63 characters long, and comply with &lt;a
@@ -733,6 +1276,21 @@ public final Endpoint createEndpoint(String parent, Endpoint endpoint, String en
   /**
    * Creates a endpoint, and returns the new Endpoint.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   CreateEndpointRequest request =
+   *       CreateEndpointRequest.newBuilder()
+   *           .setParent(
+   *               ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]").toString())
+   *           .setEndpointId("endpointId-1837754992")
+   *           .setEndpoint(Endpoint.newBuilder().build())
+   *           .build();
+   *   Endpoint response = registrationServiceClient.createEndpoint(request);
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -745,6 +1303,22 @@ public final Endpoint createEndpoint(CreateEndpointRequest request) {
    * Creates a endpoint, and returns the new Endpoint.
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   CreateEndpointRequest request =
+   *       CreateEndpointRequest.newBuilder()
+   *           .setParent(
+   *               ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]").toString())
+   *           .setEndpointId("endpointId-1837754992")
+   *           .setEndpoint(Endpoint.newBuilder().build())
+   *           .build();
+   *   ApiFuture<Endpoint> future =
+   *       registrationServiceClient.createEndpointCallable().futureCall(request);
+   *   // Do something.
+   *   Endpoint response = future.get();
+   * }
+   * }</pre>
    */
   public final UnaryCallable<CreateEndpointRequest, Endpoint> createEndpointCallable() {
     return stub.createEndpointCallable();
@@ -754,6 +1328,17 @@ public final UnaryCallable<CreateEndpointRequest, Endpoint> createEndpointCallab
   /**
    * Lists all endpoints.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   ServiceName parent = ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]");
+   *   for (Endpoint element : registrationServiceClient.listEndpoints(parent).iterateAll()) {
+   *     // doThingsWith(element);
+   *   }
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource name of the service whose endpoints we'd like to list.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -769,6 +1354,18 @@ public final ListEndpointsPagedResponse listEndpoints(ServiceName parent) {
   /**
    * Lists all endpoints.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   String parent =
+   *       ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]").toString();
+   *   for (Endpoint element : registrationServiceClient.listEndpoints(parent).iterateAll()) {
+   *     // doThingsWith(element);
+   *   }
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource name of the service whose endpoints we'd like to list.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -781,6 +1378,25 @@ public final ListEndpointsPagedResponse listEndpoints(String parent) {
   /**
    * Lists all endpoints.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   ListEndpointsRequest request =
+   *       ListEndpointsRequest.newBuilder()
+   *           .setParent(
+   *               ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]").toString())
+   *           .setPageSize(883849137)
+   *           .setPageToken("pageToken873572522")
+   *           .setFilter("filter-1274492040")
+   *           .setOrderBy("orderBy-1207110587")
+   *           .build();
+   *   for (Endpoint element : registrationServiceClient.listEndpoints(request).iterateAll()) {
+   *     // doThingsWith(element);
+   *   }
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -793,6 +1409,26 @@ public final ListEndpointsPagedResponse listEndpoints(ListEndpointsRequest reque
    * Lists all endpoints.
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   ListEndpointsRequest request =
+   *       ListEndpointsRequest.newBuilder()
+   *           .setParent(
+   *               ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]").toString())
+   *           .setPageSize(883849137)
+   *           .setPageToken("pageToken873572522")
+   *           .setFilter("filter-1274492040")
+   *           .setOrderBy("orderBy-1207110587")
+   *           .build();
+   *   ApiFuture<Endpoint> future =
+   *       registrationServiceClient.listEndpointsPagedCallable().futureCall(request);
+   *   // Do something.
+   *   for (Endpoint element : future.get().iterateAll()) {
+   *     // doThingsWith(element);
+   *   }
+   * }
+   * }</pre>
    */
   public final UnaryCallable<ListEndpointsRequest, ListEndpointsPagedResponse>
       listEndpointsPagedCallable() {
@@ -804,6 +1440,24 @@ public final ListEndpointsPagedResponse listEndpoints(ListEndpointsRequest reque
    * Lists all endpoints.
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   while (true) {
+   *     ListEndpointsResponse response =
+   *         registrationServiceClient.listEndpointsCallable().call(request);
+   *     for (Endpoint element : response.getResponsesList()) {
+   *       // doThingsWith(element);
+   *     }
+   *     String nextPageToken = response.getNextPageToken();
+   *     if (!Strings.isNullOrEmpty(nextPageToken)) {
+   *       request = request.toBuilder().setPageToken(nextPageToken).build();
+   *     } else {
+   *       break;
+   *     }
+   *   }
+   * }
+   * }</pre>
    */
   public final UnaryCallable<ListEndpointsRequest, ListEndpointsResponse> listEndpointsCallable() {
     return stub.listEndpointsCallable();
@@ -813,6 +1467,16 @@ public final UnaryCallable<ListEndpointsRequest, ListEndpointsResponse> listEndp
   /**
    * Gets a endpoint.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   EndpointName name =
+   *       EndpointName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]", "[ENDPOINT]");
+   *   Endpoint response = registrationServiceClient.getEndpoint(name);
+   * }
+   * }</pre>
+   *
    * @param name Required. The name of the endpoint to get.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -826,6 +1490,17 @@ public final Endpoint getEndpoint(EndpointName name) {
   /**
    * Gets a endpoint.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   String name =
+   *       EndpointName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]", "[ENDPOINT]")
+   *           .toString();
+   *   Endpoint response = registrationServiceClient.getEndpoint(name);
+   * }
+   * }</pre>
+   *
    * @param name Required. The name of the endpoint to get.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -838,6 +1513,21 @@ public final Endpoint getEndpoint(String name) {
   /**
    * Gets a endpoint.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   GetEndpointRequest request =
+   *       GetEndpointRequest.newBuilder()
+   *           .setName(
+   *               EndpointName.of(
+   *                       "[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]", "[ENDPOINT]")
+   *                   .toString())
+   *           .build();
+   *   Endpoint response = registrationServiceClient.getEndpoint(request);
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -850,6 +1540,22 @@ public final Endpoint getEndpoint(GetEndpointRequest request) {
    * Gets a endpoint.
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   GetEndpointRequest request =
+   *       GetEndpointRequest.newBuilder()
+   *           .setName(
+   *               EndpointName.of(
+   *                       "[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]", "[ENDPOINT]")
+   *                   .toString())
+   *           .build();
+   *   ApiFuture<Endpoint> future =
+   *       registrationServiceClient.getEndpointCallable().futureCall(request);
+   *   // Do something.
+   *   Endpoint response = future.get();
+   * }
+   * }</pre>
    */
   public final UnaryCallable<GetEndpointRequest, Endpoint> getEndpointCallable() {
     return stub.getEndpointCallable();
@@ -859,6 +1565,16 @@ public final UnaryCallable<GetEndpointRequest, Endpoint> getEndpointCallable() {
   /**
    * Updates a endpoint.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   Endpoint endpoint = Endpoint.newBuilder().build();
+   *   FieldMask updateMask = FieldMask.newBuilder().build();
+   *   Endpoint response = registrationServiceClient.updateEndpoint(endpoint, updateMask);
+   * }
+   * }</pre>
+   *
    * @param endpoint Required. The updated endpoint.
    * @param updateMask Required. List of fields to be updated in this request.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
@@ -873,6 +1589,19 @@ public final Endpoint updateEndpoint(Endpoint endpoint, FieldMask updateMask) {
   /**
    * Updates a endpoint.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   UpdateEndpointRequest request =
+   *       UpdateEndpointRequest.newBuilder()
+   *           .setEndpoint(Endpoint.newBuilder().build())
+   *           .setUpdateMask(FieldMask.newBuilder().build())
+   *           .build();
+   *   Endpoint response = registrationServiceClient.updateEndpoint(request);
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -885,6 +1614,20 @@ public final Endpoint updateEndpoint(UpdateEndpointRequest request) {
    * Updates a endpoint.
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   UpdateEndpointRequest request =
+   *       UpdateEndpointRequest.newBuilder()
+   *           .setEndpoint(Endpoint.newBuilder().build())
+   *           .setUpdateMask(FieldMask.newBuilder().build())
+   *           .build();
+   *   ApiFuture<Endpoint> future =
+   *       registrationServiceClient.updateEndpointCallable().futureCall(request);
+   *   // Do something.
+   *   Endpoint response = future.get();
+   * }
+   * }</pre>
    */
   public final UnaryCallable<UpdateEndpointRequest, Endpoint> updateEndpointCallable() {
     return stub.updateEndpointCallable();
@@ -894,6 +1637,16 @@ public final UnaryCallable<UpdateEndpointRequest, Endpoint> updateEndpointCallab
   /**
    * Deletes a endpoint.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   EndpointName name =
+   *       EndpointName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]", "[ENDPOINT]");
+   *   registrationServiceClient.deleteEndpoint(name);
+   * }
+   * }</pre>
+   *
    * @param name Required. The name of the endpoint to delete.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -907,6 +1660,17 @@ public final void deleteEndpoint(EndpointName name) {
   /**
    * Deletes a endpoint.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   String name =
+   *       EndpointName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]", "[ENDPOINT]")
+   *           .toString();
+   *   registrationServiceClient.deleteEndpoint(name);
+   * }
+   * }</pre>
+   *
    * @param name Required. The name of the endpoint to delete.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -919,6 +1683,21 @@ public final void deleteEndpoint(String name) {
   /**
    * Deletes a endpoint.
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   DeleteEndpointRequest request =
+   *       DeleteEndpointRequest.newBuilder()
+   *           .setName(
+   *               EndpointName.of(
+   *                       "[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]", "[ENDPOINT]")
+   *                   .toString())
+   *           .build();
+   *   registrationServiceClient.deleteEndpoint(request);
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -931,6 +1710,22 @@ public final void deleteEndpoint(DeleteEndpointRequest request) {
    * Deletes a endpoint.
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   DeleteEndpointRequest request =
+   *       DeleteEndpointRequest.newBuilder()
+   *           .setName(
+   *               EndpointName.of(
+   *                       "[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]", "[ENDPOINT]")
+   *                   .toString())
+   *           .build();
+   *   ApiFuture<Empty> future =
+   *       registrationServiceClient.deleteEndpointCallable().futureCall(request);
+   *   // Do something.
+   *   future.get();
+   * }
+   * }</pre>
    */
   public final UnaryCallable<DeleteEndpointRequest, Empty> deleteEndpointCallable() {
     return stub.deleteEndpointCallable();
@@ -940,6 +1735,19 @@ public final UnaryCallable<DeleteEndpointRequest, Empty> deleteEndpointCallable(
   /**
    * Gets the IAM Policy for a resource (namespace or service only).
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   GetIamPolicyRequest request =
+   *       GetIamPolicyRequest.newBuilder()
+   *           .setResource(NamespaceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]").toString())
+   *           .setOptions(GetPolicyOptions.newBuilder().build())
+   *           .build();
+   *   Policy response = registrationServiceClient.getIamPolicy(request);
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -952,6 +1760,20 @@ public final Policy getIamPolicy(GetIamPolicyRequest request) {
    * Gets the IAM Policy for a resource (namespace or service only).
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   GetIamPolicyRequest request =
+   *       GetIamPolicyRequest.newBuilder()
+   *           .setResource(NamespaceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]").toString())
+   *           .setOptions(GetPolicyOptions.newBuilder().build())
+   *           .build();
+   *   ApiFuture<Policy> future =
+   *       registrationServiceClient.getIamPolicyCallable().futureCall(request);
+   *   // Do something.
+   *   Policy response = future.get();
+   * }
+   * }</pre>
    */
   public final UnaryCallable<GetIamPolicyRequest, Policy> getIamPolicyCallable() {
     return stub.getIamPolicyCallable();
@@ -961,6 +1783,19 @@ public final UnaryCallable<GetIamPolicyRequest, Policy> getIamPolicyCallable() {
   /**
    * Sets the IAM Policy for a resource (namespace or service only).
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   SetIamPolicyRequest request =
+   *       SetIamPolicyRequest.newBuilder()
+   *           .setResource(NamespaceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]").toString())
+   *           .setPolicy(Policy.newBuilder().build())
+   *           .build();
+   *   Policy response = registrationServiceClient.setIamPolicy(request);
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -973,6 +1808,20 @@ public final Policy setIamPolicy(SetIamPolicyRequest request) {
    * Sets the IAM Policy for a resource (namespace or service only).
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   SetIamPolicyRequest request =
+   *       SetIamPolicyRequest.newBuilder()
+   *           .setResource(NamespaceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]").toString())
+   *           .setPolicy(Policy.newBuilder().build())
+   *           .build();
+   *   ApiFuture<Policy> future =
+   *       registrationServiceClient.setIamPolicyCallable().futureCall(request);
+   *   // Do something.
+   *   Policy response = future.get();
+   * }
+   * }</pre>
    */
   public final UnaryCallable<SetIamPolicyRequest, Policy> setIamPolicyCallable() {
     return stub.setIamPolicyCallable();
@@ -982,6 +1831,19 @@ public final UnaryCallable<SetIamPolicyRequest, Policy> setIamPolicyCallable() {
   /**
    * Tests IAM permissions for a resource (namespace or service only).
    *
+   * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   TestIamPermissionsRequest request =
+   *       TestIamPermissionsRequest.newBuilder()
+   *           .setResource(NamespaceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]").toString())
+   *           .addAllPermissions(new ArrayList<String>())
+   *           .build();
+   *   TestIamPermissionsResponse response = registrationServiceClient.testIamPermissions(request);
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -994,6 +1856,20 @@ public final TestIamPermissionsResponse testIamPermissions(TestIamPermissionsReq
    * Tests IAM permissions for a resource (namespace or service only).
    *
    * <p>Sample code:
+   *
+   * <pre>{@code
+   * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+   *   TestIamPermissionsRequest request =
+   *       TestIamPermissionsRequest.newBuilder()
+   *           .setResource(NamespaceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]").toString())
+   *           .addAllPermissions(new ArrayList<String>())
+   *           .build();
+   *   ApiFuture<TestIamPermissionsResponse> future =
+   *       registrationServiceClient.testIamPermissionsCallable().futureCall(request);
+   *   // Do something.
+   *   TestIamPermissionsResponse response = future.get();
+   * }
+   * }</pre>
    */
   public final UnaryCallable<TestIamPermissionsRequest, TestIamPermissionsResponse>
       testIamPermissionsCallable() {
diff --git a/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1beta1/package-info.java b/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1beta1/package-info.java
index e2cd196a..941c1105 100644
--- a/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1beta1/package-info.java
+++ b/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1beta1/package-info.java
@@ -23,6 +23,19 @@
  *
  * <p>Sample for LookupServiceClient:
  *
+ * <pre>{@code
+ * try (LookupServiceClient lookupServiceClient = LookupServiceClient.create()) {
+ *   ResolveServiceRequest request =
+ *       ResolveServiceRequest.newBuilder()
+ *           .setName(
+ *               ServiceName.of("[PROJECT]", "[LOCATION]", "[NAMESPACE]", "[SERVICE]").toString())
+ *           .setMaxEndpoints(2074789987)
+ *           .setEndpointFilter("endpointFilter-1834249875")
+ *           .build();
+ *   ResolveServiceResponse response = lookupServiceClient.resolveService(request);
+ * }
+ * }</pre>
+ *
  * <p>======================= RegistrationServiceClient =======================
  *
  * <p>Service Description: Service Directory API for registering services. It defines the following
@@ -39,6 +52,16 @@
  * `projects/&#42;/locations/&#42;/namespaces/&#42;/services/&#42;/endpoints/&#42;`.
  *
  * <p>Sample for RegistrationServiceClient:
+ *
+ * <pre>{@code
+ * try (RegistrationServiceClient registrationServiceClient = RegistrationServiceClient.create()) {
+ *   LocationName parent = LocationName.of("[PROJECT]", "[LOCATION]");
+ *   Namespace namespace = Namespace.newBuilder().build();
+ *   String namespaceId = "namespaceId790852566";
+ *   Namespace response =
+ *       registrationServiceClient.createNamespace(parent, namespace, namespaceId);
+ * }
+ * }</pre>
  */
 @Generated("by gapic-generator-java")
 package com.google.cloud.servicedirectory.v1beta1;
diff --git a/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1beta1/stub/GrpcLookupServiceStub.java b/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1beta1/stub/GrpcLookupServiceStub.java
index d84f1f92..efce3a89 100644
--- a/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1beta1/stub/GrpcLookupServiceStub.java
+++ b/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1beta1/stub/GrpcLookupServiceStub.java
@@ -127,6 +127,7 @@ public GrpcOperationsStub getOperationsStub() {
     return operationsStub;
   }
 
+  @Override
   public UnaryCallable<ResolveServiceRequest, ResolveServiceResponse> resolveServiceCallable() {
     return resolveServiceCallable;
   }
diff --git a/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1beta1/stub/GrpcRegistrationServiceStub.java b/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1beta1/stub/GrpcRegistrationServiceStub.java
index 49d20286..a1440b25 100644
--- a/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1beta1/stub/GrpcRegistrationServiceStub.java
+++ b/google-cloud-servicedirectory/src/main/java/com/google/cloud/servicedirectory/v1beta1/stub/GrpcRegistrationServiceStub.java
@@ -643,88 +643,109 @@ public GrpcOperationsStub getOperationsStub() {
     return operationsStub;
   }
 
+  @Override
   public UnaryCallable<CreateNamespaceRequest, Namespace> createNamespaceCallable() {
     return createNamespaceCallable;
   }
 
+  @Override
   public UnaryCallable<ListNamespacesRequest, ListNamespacesResponse> listNamespacesCallable() {
     return listNamespacesCallable;
   }
 
+  @Override
   public UnaryCallable<ListNamespacesRequest, ListNamespacesPagedResponse>
       listNamespacesPagedCallable() {
     return listNamespacesPagedCallable;
   }
 
+  @Override
   public UnaryCallable<GetNamespaceRequest, Namespace> getNamespaceCallable() {
     return getNamespaceCallable;
   }
 
+  @Override
   public UnaryCallable<UpdateNamespaceRequest, Namespace> updateNamespaceCallable() {
     return updateNamespaceCallable;
   }
 
+  @Override
   public UnaryCallable<DeleteNamespaceRequest, Empty> deleteNamespaceCallable() {
     return deleteNamespaceCallable;
   }
 
+  @Override
   public UnaryCallable<CreateServiceRequest, Service> createServiceCallable() {
     return createServiceCallable;
   }
 
+  @Override
   public UnaryCallable<ListServicesRequest, ListServicesResponse> listServicesCallable() {
     return listServicesCallable;
   }
 
+  @Override
   public UnaryCallable<ListServicesRequest, ListServicesPagedResponse> listServicesPagedCallable() {
     return listServicesPagedCallable;
   }
 
+  @Override
   public UnaryCallable<GetServiceRequest, Service> getServiceCallable() {
     return getServiceCallable;
   }
 
+  @Override
   public UnaryCallable<UpdateServiceRequest, Service> updateServiceCallable() {
     return updateServiceCallable;
   }
 
+  @Override
   public UnaryCallable<DeleteServiceRequest, Empty> deleteServiceCallable() {
     return deleteServiceCallable;
   }
 
+  @Override
   public UnaryCallable<CreateEndpointRequest, Endpoint> createEndpointCallable() {
     return createEndpointCallable;
   }
 
+  @Override
   public UnaryCallable<ListEndpointsRequest, ListEndpointsResponse> listEndpointsCallable() {
     return listEndpointsCallable;
   }
 
+  @Override
   public UnaryCallable<ListEndpointsRequest, ListEndpointsPagedResponse>
       listEndpointsPagedCallable() {
     return listEndpointsPagedCallable;
   }
 
+  @Override
   public UnaryCallable<GetEndpointRequest, Endpoint> getEndpointCallable() {
     return getEndpointCallable;
   }
 
+  @Override
   public UnaryCallable<UpdateEndpointRequest, Endpoint> updateEndpointCallable() {
     return updateEndpointCallable;
   }
 
+  @Override
   public UnaryCallable<DeleteEndpointRequest, Empty> deleteEndpointCallable() {
     return deleteEndpointCallable;
   }
 
+  @Override
   public UnaryCallable<GetIamPolicyRequest, Policy> getIamPolicyCallable() {
     return getIamPolicyCallable;
   }
 
+  @Override
   public UnaryCallable<SetIamPolicyRequest, Policy> setIamPolicyCallable() {
     return setIamPolicyCallable;
   }
 
+  @Override
   public UnaryCallable<TestIamPermissionsRequest, TestIamPermissionsResponse>
       testIamPermissionsCallable() {
     return testIamPermissionsCallable;
diff --git a/google-cloud-servicedirectory/src/test/java/com/google/cloud/servicedirectory/v1/MockLookupServiceImpl.java b/google-cloud-servicedirectory/src/test/java/com/google/cloud/servicedirectory/v1/MockLookupServiceImpl.java
index ba4c82a5..95496f1b 100644
--- a/google-cloud-servicedirectory/src/test/java/com/google/cloud/servicedirectory/v1/MockLookupServiceImpl.java
+++ b/google-cloud-servicedirectory/src/test/java/com/google/cloud/servicedirectory/v1/MockLookupServiceImpl.java
@@ -69,7 +69,13 @@ public void resolveService(
     } else if (response instanceof Exception) {
       responseObserver.onError(((Exception) response));
     } else {
-      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method ResolveService, expected %s or %s",
+                  response.getClass().getName(),
+                  ResolveServiceResponse.class.getName(),
+                  Exception.class.getName())));
     }
   }
 }
diff --git a/google-cloud-servicedirectory/src/test/java/com/google/cloud/servicedirectory/v1/MockRegistrationServiceImpl.java b/google-cloud-servicedirectory/src/test/java/com/google/cloud/servicedirectory/v1/MockRegistrationServiceImpl.java
index 5a81f3e1..0580ce5c 100644
--- a/google-cloud-servicedirectory/src/test/java/com/google/cloud/servicedirectory/v1/MockRegistrationServiceImpl.java
+++ b/google-cloud-servicedirectory/src/test/java/com/google/cloud/servicedirectory/v1/MockRegistrationServiceImpl.java
@@ -75,7 +75,13 @@ public void createNamespace(
     } else if (response instanceof Exception) {
       responseObserver.onError(((Exception) response));
     } else {
-      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method CreateNamespace, expected %s or %s",
+                  response.getClass().getName(),
+                  Namespace.class.getName(),
+                  Exception.class.getName())));
     }
   }
 
@@ -90,7 +96,13 @@ public void listNamespaces(
     } else if (response instanceof Exception) {
       responseObserver.onError(((Exception) response));
     } else {
-      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method ListNamespaces, expected %s or %s",
+                  response.getClass().getName(),
+                  ListNamespacesResponse.class.getName(),
+                  Exception.class.getName())));
     }
   }
 
@@ -105,7 +117,13 @@ public void getNamespace(
     } else if (response instanceof Exception) {
       responseObserver.onError(((Exception) response));
     } else {
-      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method GetNamespace, expected %s or %s",
+                  response.getClass().getName(),
+                  Namespace.class.getName(),
+                  Exception.class.getName())));
     }
   }
 
@@ -120,7 +138,13 @@ public void updateNamespace(
     } else if (response instanceof Exception) {
       responseObserver.onError(((Exception) response));
     } else {
-      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method UpdateNamespace, expected %s or %s",
+                  response.getClass().getName(),
+                  Namespace.class.getName(),
+                  Exception.class.getName())));
     }
   }
 
@@ -135,7 +159,13 @@ public void deleteNamespace(
     } else if (response instanceof Exception) {
       responseObserver.onError(((Exception) response));
     } else {
-      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method DeleteNamespace, expected %s or %s",
+                  response.getClass().getName(),
+                  Empty.class.getName(),
+                  Exception.class.getName())));
     }
   }
 
@@ -150,7 +180,13 @@ public void createService(
     } else if (response instanceof Exception) {
       responseObserver.onError(((Exception) response));
     } else {
-      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method CreateService, expected %s or %s",
+                  response.getClass().getName(),
+                  Service.class.getName(),
+                  Exception.class.getName())));
     }
   }
 
@@ -165,7 +201,13 @@ public void listServices(
     } else if (response instanceof Exception) {
       responseObserver.onError(((Exception) response));
     } else {
-      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method ListServices, expected %s or %s",
+                  response.getClass().getName(),
+                  ListServicesResponse.class.getName(),
+                  Exception.class.getName())));
     }
   }
 
@@ -179,7 +221,13 @@ public void getService(GetServiceRequest request, StreamObserver<Service> respon
     } else if (response instanceof Exception) {
       responseObserver.onError(((Exception) response));
     } else {
-      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method GetService, expected %s or %s",
+                  response.getClass().getName(),
+                  Service.class.getName(),
+                  Exception.class.getName())));
     }
   }
 
@@ -194,7 +242,13 @@ public void updateService(
     } else if (response instanceof Exception) {
       responseObserver.onError(((Exception) response));
     } else {
-      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method UpdateService, expected %s or %s",
+                  response.getClass().getName(),
+                  Service.class.getName(),
+                  Exception.class.getName())));
     }
   }
 
@@ -208,7 +262,13 @@ public void deleteService(DeleteServiceRequest request, StreamObserver<Empty> re
     } else if (response instanceof Exception) {
       responseObserver.onError(((Exception) response));
     } else {
-      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method DeleteService, expected %s or %s",
+                  response.getClass().getName(),
+                  Empty.class.getName(),
+                  Exception.class.getName())));
     }
   }
 
@@ -223,7 +283,13 @@ public void createEndpoint(
     } else if (response instanceof Exception) {
       responseObserver.onError(((Exception) response));
     } else {
-      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method CreateEndpoint, expected %s or %s",
+                  response.getClass().getName(),
+                  Endpoint.class.getName(),
+                  Exception.class.getName())));
     }
   }
 
@@ -238,7 +304,13 @@ public void listEndpoints(
     } else if (response instanceof Exception) {
       responseObserver.onError(((Exception) response));
     } else {
-      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method ListEndpoints, expected %s or %s",
+                  response.getClass().getName(),
+                  ListEndpointsResponse.class.getName(),
+                  Exception.class.getName())));
     }
   }
 
@@ -252,7 +324,13 @@ public void getEndpoint(GetEndpointRequest request, StreamObserver<Endpoint> res
     } else if (response instanceof Exception) {
       responseObserver.onError(((Exception) response));
     } else {
-      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method GetEndpoint, expected %s or %s",
+                  response.getClass().getName(),
+                  Endpoint.class.getName(),
+                  Exception.class.getName())));
     }
   }
 
@@ -267,7 +345,13 @@ public void updateEndpoint(
     } else if (response instanceof Exception) {
       responseObserver.onError(((Exception) response));
     } else {
-      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method UpdateEndpoint, expected %s or %s",
+                  response.getClass().getName(),
+                  Endpoint.class.getName(),
+                  Exception.class.getName())));
     }
   }
 
@@ -282,7 +366,13 @@ public void deleteEndpoint(
     } else if (response instanceof Exception) {
       responseObserver.onError(((Exception) response));
     } else {
-      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method DeleteEndpoint, expected %s or %s",
+                  response.getClass().getName(),
+                  Empty.class.getName(),
+                  Exception.class.getName())));
     }
   }
 
@@ -296,7 +386,13 @@ public void getIamPolicy(GetIamPolicyRequest request, StreamObserver<Policy> res
     } else if (response instanceof Exception) {
       responseObserver.onError(((Exception) response));
     } else {
-      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method GetIamPolicy, expected %s or %s",
+                  response.getClass().getName(),
+                  Policy.class.getName(),
+                  Exception.class.getName())));
     }
   }
 
@@ -310,7 +406,13 @@ public void setIamPolicy(SetIamPolicyRequest request, StreamObserver<Policy> res
     } else if (response instanceof Exception) {
       responseObserver.onError(((Exception) response));
     } else {
-      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method SetIamPolicy, expected %s or %s",
+                  response.getClass().getName(),
+                  Policy.class.getName(),
+                  Exception.class.getName())));
     }
   }
 
@@ -326,7 +428,13 @@ public void testIamPermissions(
     } else if (response instanceof Exception) {
       responseObserver.onError(((Exception) response));
     } else {
-      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method TestIamPermissions, expected %s or %s",
+                  response.getClass().getName(),
+                  TestIamPermissionsResponse.class.getName(),
+                  Exception.class.getName())));
     }
   }
 }
diff --git a/google-cloud-servicedirectory/src/test/java/com/google/cloud/servicedirectory/v1beta1/MockLookupServiceImpl.java b/google-cloud-servicedirectory/src/test/java/com/google/cloud/servicedirectory/v1beta1/MockLookupServiceImpl.java
index f4c5faec..452ebfe7 100644
--- a/google-cloud-servicedirectory/src/test/java/com/google/cloud/servicedirectory/v1beta1/MockLookupServiceImpl.java
+++ b/google-cloud-servicedirectory/src/test/java/com/google/cloud/servicedirectory/v1beta1/MockLookupServiceImpl.java
@@ -69,7 +69,13 @@ public void resolveService(
     } else if (response instanceof Exception) {
       responseObserver.onError(((Exception) response));
     } else {
-      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method ResolveService, expected %s or %s",
+                  response.getClass().getName(),
+                  ResolveServiceResponse.class.getName(),
+                  Exception.class.getName())));
     }
   }
 }
diff --git a/google-cloud-servicedirectory/src/test/java/com/google/cloud/servicedirectory/v1beta1/MockRegistrationServiceImpl.java b/google-cloud-servicedirectory/src/test/java/com/google/cloud/servicedirectory/v1beta1/MockRegistrationServiceImpl.java
index 7a249b3c..183df3e5 100644
--- a/google-cloud-servicedirectory/src/test/java/com/google/cloud/servicedirectory/v1beta1/MockRegistrationServiceImpl.java
+++ b/google-cloud-servicedirectory/src/test/java/com/google/cloud/servicedirectory/v1beta1/MockRegistrationServiceImpl.java
@@ -75,7 +75,13 @@ public void createNamespace(
     } else if (response instanceof Exception) {
       responseObserver.onError(((Exception) response));
     } else {
-      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method CreateNamespace, expected %s or %s",
+                  response.getClass().getName(),
+                  Namespace.class.getName(),
+                  Exception.class.getName())));
     }
   }
 
@@ -90,7 +96,13 @@ public void listNamespaces(
     } else if (response instanceof Exception) {
       responseObserver.onError(((Exception) response));
     } else {
-      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method ListNamespaces, expected %s or %s",
+                  response.getClass().getName(),
+                  ListNamespacesResponse.class.getName(),
+                  Exception.class.getName())));
     }
   }
 
@@ -105,7 +117,13 @@ public void getNamespace(
     } else if (response instanceof Exception) {
       responseObserver.onError(((Exception) response));
     } else {
-      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method GetNamespace, expected %s or %s",
+                  response.getClass().getName(),
+                  Namespace.class.getName(),
+                  Exception.class.getName())));
     }
   }
 
@@ -120,7 +138,13 @@ public void updateNamespace(
     } else if (response instanceof Exception) {
       responseObserver.onError(((Exception) response));
     } else {
-      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method UpdateNamespace, expected %s or %s",
+                  response.getClass().getName(),
+                  Namespace.class.getName(),
+                  Exception.class.getName())));
     }
   }
 
@@ -135,7 +159,13 @@ public void deleteNamespace(
     } else if (response instanceof Exception) {
       responseObserver.onError(((Exception) response));
     } else {
-      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method DeleteNamespace, expected %s or %s",
+                  response.getClass().getName(),
+                  Empty.class.getName(),
+                  Exception.class.getName())));
     }
   }
 
@@ -150,7 +180,13 @@ public void createService(
     } else if (response instanceof Exception) {
       responseObserver.onError(((Exception) response));
     } else {
-      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method CreateService, expected %s or %s",
+                  response.getClass().getName(),
+                  Service.class.getName(),
+                  Exception.class.getName())));
     }
   }
 
@@ -165,7 +201,13 @@ public void listServices(
     } else if (response instanceof Exception) {
       responseObserver.onError(((Exception) response));
     } else {
-      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method ListServices, expected %s or %s",
+                  response.getClass().getName(),
+                  ListServicesResponse.class.getName(),
+                  Exception.class.getName())));
     }
   }
 
@@ -179,7 +221,13 @@ public void getService(GetServiceRequest request, StreamObserver<Service> respon
     } else if (response instanceof Exception) {
       responseObserver.onError(((Exception) response));
     } else {
-      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method GetService, expected %s or %s",
+                  response.getClass().getName(),
+                  Service.class.getName(),
+                  Exception.class.getName())));
     }
   }
 
@@ -194,7 +242,13 @@ public void updateService(
     } else if (response instanceof Exception) {
       responseObserver.onError(((Exception) response));
     } else {
-      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method UpdateService, expected %s or %s",
+                  response.getClass().getName(),
+                  Service.class.getName(),
+                  Exception.class.getName())));
     }
   }
 
@@ -208,7 +262,13 @@ public void deleteService(DeleteServiceRequest request, StreamObserver<Empty> re
     } else if (response instanceof Exception) {
       responseObserver.onError(((Exception) response));
     } else {
-      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method DeleteService, expected %s or %s",
+                  response.getClass().getName(),
+                  Empty.class.getName(),
+                  Exception.class.getName())));
     }
   }
 
@@ -223,7 +283,13 @@ public void createEndpoint(
     } else if (response instanceof Exception) {
       responseObserver.onError(((Exception) response));
     } else {
-      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method CreateEndpoint, expected %s or %s",
+                  response.getClass().getName(),
+                  Endpoint.class.getName(),
+                  Exception.class.getName())));
     }
   }
 
@@ -238,7 +304,13 @@ public void listEndpoints(
     } else if (response instanceof Exception) {
       responseObserver.onError(((Exception) response));
     } else {
-      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method ListEndpoints, expected %s or %s",
+                  response.getClass().getName(),
+                  ListEndpointsResponse.class.getName(),
+                  Exception.class.getName())));
     }
   }
 
@@ -252,7 +324,13 @@ public void getEndpoint(GetEndpointRequest request, StreamObserver<Endpoint> res
     } else if (response instanceof Exception) {
       responseObserver.onError(((Exception) response));
     } else {
-      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method GetEndpoint, expected %s or %s",
+                  response.getClass().getName(),
+                  Endpoint.class.getName(),
+                  Exception.class.getName())));
     }
   }
 
@@ -267,7 +345,13 @@ public void updateEndpoint(
     } else if (response instanceof Exception) {
       responseObserver.onError(((Exception) response));
     } else {
-      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method UpdateEndpoint, expected %s or %s",
+                  response.getClass().getName(),
+                  Endpoint.class.getName(),
+                  Exception.class.getName())));
     }
   }
 
@@ -282,7 +366,13 @@ public void deleteEndpoint(
     } else if (response instanceof Exception) {
       responseObserver.onError(((Exception) response));
     } else {
-      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method DeleteEndpoint, expected %s or %s",
+                  response.getClass().getName(),
+                  Empty.class.getName(),
+                  Exception.class.getName())));
     }
   }
 
@@ -296,7 +386,13 @@ public void getIamPolicy(GetIamPolicyRequest request, StreamObserver<Policy> res
     } else if (response instanceof Exception) {
       responseObserver.onError(((Exception) response));
     } else {
-      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method GetIamPolicy, expected %s or %s",
+                  response.getClass().getName(),
+                  Policy.class.getName(),
+                  Exception.class.getName())));
     }
   }
 
@@ -310,7 +406,13 @@ public void setIamPolicy(SetIamPolicyRequest request, StreamObserver<Policy> res
     } else if (response instanceof Exception) {
       responseObserver.onError(((Exception) response));
     } else {
-      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method SetIamPolicy, expected %s or %s",
+                  response.getClass().getName(),
+                  Policy.class.getName(),
+                  Exception.class.getName())));
     }
   }
 
@@ -326,7 +428,13 @@ public void testIamPermissions(
     } else if (response instanceof Exception) {
       responseObserver.onError(((Exception) response));
     } else {
-      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
+      responseObserver.onError(
+          new IllegalArgumentException(
+              String.format(
+                  "Unrecognized response type %s for method TestIamPermissions, expected %s or %s",
+                  response.getClass().getName(),
+                  TestIamPermissionsResponse.class.getName(),
+                  Exception.class.getName())));
     }
   }
 }
diff --git a/synth.metadata b/synth.metadata
index e2e90dc3..9b4b4f85 100644
--- a/synth.metadata
+++ b/synth.metadata
@@ -11,16 +11,16 @@
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "f83715b48369c8d43548cc3cd84015e60be94cf2",
-        "internalRef": "352834280"
+        "sha": "e8bc4471a88ac5f60defe3ed436f517174e59ba0",
+        "internalRef": "357800868"
       }
     },
     {
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "f83715b48369c8d43548cc3cd84015e60be94cf2",
-        "internalRef": "352834280"
+        "sha": "e8bc4471a88ac5f60defe3ed436f517174e59ba0",
+        "internalRef": "357800868"
       }
     },
     {