diff --git a/java-storage-transfer/google-cloud-storage-transfer/src/main/java/com/google/storagetransfer/v1/proto/StorageTransferServiceClient.java b/java-storage-transfer/google-cloud-storage-transfer/src/main/java/com/google/storagetransfer/v1/proto/StorageTransferServiceClient.java
index c0f7b40702cc..fcfc3bf30e07 100644
--- a/java-storage-transfer/google-cloud-storage-transfer/src/main/java/com/google/storagetransfer/v1/proto/StorageTransferServiceClient.java
+++ b/java-storage-transfer/google-cloud-storage-transfer/src/main/java/com/google/storagetransfer/v1/proto/StorageTransferServiceClient.java
@@ -48,8 +48,11 @@
  * calls that map to API methods. Sample code to get started:
  *
  * <pre>{@code
- * // This snippet has been automatically generated for illustrative purposes only.
- * // It may require modifications to work in your environment.
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
  * try (StorageTransferServiceClient storageTransferServiceClient =
  *     StorageTransferServiceClient.create()) {
  *   TransferProto.GetGoogleServiceAccountRequest request =
@@ -91,8 +94,11 @@
  * <p>To customize credentials:
  *
  * <pre>{@code
- * // This snippet has been automatically generated for illustrative purposes only.
- * // It may require modifications to work in your environment.
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
  * StorageTransferServiceSettings storageTransferServiceSettings =
  *     StorageTransferServiceSettings.newBuilder()
  *         .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
@@ -104,8 +110,11 @@
  * <p>To customize the endpoint:
  *
  * <pre>{@code
- * // This snippet has been automatically generated for illustrative purposes only.
- * // It may require modifications to work in your environment.
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
  * StorageTransferServiceSettings storageTransferServiceSettings =
  *     StorageTransferServiceSettings.newBuilder().setEndpoint(myEndpoint).build();
  * StorageTransferServiceClient storageTransferServiceClient =
@@ -116,8 +125,11 @@
  * the wire:
  *
  * <pre>{@code
- * // This snippet has been automatically generated for illustrative purposes only.
- * // It may require modifications to work in your environment.
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
  * StorageTransferServiceSettings storageTransferServiceSettings =
  *     StorageTransferServiceSettings.newBuilder()
  *         .setTransportChannelProvider(
@@ -216,8 +228,11 @@ public final OperationsClient getHttpJsonOperationsClient() {
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (StorageTransferServiceClient storageTransferServiceClient =
    *     StorageTransferServiceClient.create()) {
    *   TransferProto.GetGoogleServiceAccountRequest request =
@@ -248,8 +263,11 @@ public final TransferTypes.GoogleServiceAccount getGoogleServiceAccount(
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (StorageTransferServiceClient storageTransferServiceClient =
    *     StorageTransferServiceClient.create()) {
    *   TransferProto.GetGoogleServiceAccountRequest request =
@@ -276,8 +294,11 @@ public final TransferTypes.GoogleServiceAccount getGoogleServiceAccount(
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (StorageTransferServiceClient storageTransferServiceClient =
    *     StorageTransferServiceClient.create()) {
    *   TransferProto.CreateTransferJobRequest request =
@@ -303,8 +324,11 @@ public final TransferTypes.TransferJob createTransferJob(
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (StorageTransferServiceClient storageTransferServiceClient =
    *     StorageTransferServiceClient.create()) {
    *   TransferProto.CreateTransferJobRequest request =
@@ -337,8 +361,11 @@ public final TransferTypes.TransferJob createTransferJob(
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (StorageTransferServiceClient storageTransferServiceClient =
    *     StorageTransferServiceClient.create()) {
    *   TransferProto.UpdateTransferJobRequest request =
@@ -374,8 +401,11 @@ public final TransferTypes.TransferJob updateTransferJob(
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (StorageTransferServiceClient storageTransferServiceClient =
    *     StorageTransferServiceClient.create()) {
    *   TransferProto.UpdateTransferJobRequest request =
@@ -404,8 +434,11 @@ public final TransferTypes.TransferJob updateTransferJob(
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (StorageTransferServiceClient storageTransferServiceClient =
    *     StorageTransferServiceClient.create()) {
    *   TransferProto.GetTransferJobRequest request =
@@ -432,8 +465,11 @@ public final TransferTypes.TransferJob getTransferJob(
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (StorageTransferServiceClient storageTransferServiceClient =
    *     StorageTransferServiceClient.create()) {
    *   TransferProto.GetTransferJobRequest request =
@@ -460,8 +496,11 @@ public final TransferTypes.TransferJob getTransferJob(
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (StorageTransferServiceClient storageTransferServiceClient =
    *     StorageTransferServiceClient.create()) {
    *   TransferProto.ListTransferJobsRequest request =
@@ -492,8 +531,11 @@ public final ListTransferJobsPagedResponse listTransferJobs(
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (StorageTransferServiceClient storageTransferServiceClient =
    *     StorageTransferServiceClient.create()) {
    *   TransferProto.ListTransferJobsRequest request =
@@ -523,8 +565,11 @@ public final ListTransferJobsPagedResponse listTransferJobs(
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (StorageTransferServiceClient storageTransferServiceClient =
    *     StorageTransferServiceClient.create()) {
    *   TransferProto.ListTransferJobsRequest request =
@@ -562,8 +607,11 @@ public final ListTransferJobsPagedResponse listTransferJobs(
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (StorageTransferServiceClient storageTransferServiceClient =
    *     StorageTransferServiceClient.create()) {
    *   TransferProto.PauseTransferOperationRequest request =
@@ -586,8 +634,11 @@ public final void pauseTransferOperation(TransferProto.PauseTransferOperationReq
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (StorageTransferServiceClient storageTransferServiceClient =
    *     StorageTransferServiceClient.create()) {
    *   TransferProto.PauseTransferOperationRequest request =
@@ -611,8 +662,11 @@ public final void pauseTransferOperation(TransferProto.PauseTransferOperationReq
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (StorageTransferServiceClient storageTransferServiceClient =
    *     StorageTransferServiceClient.create()) {
    *   TransferProto.ResumeTransferOperationRequest request =
@@ -635,8 +689,11 @@ public final void resumeTransferOperation(TransferProto.ResumeTransferOperationR
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (StorageTransferServiceClient storageTransferServiceClient =
    *     StorageTransferServiceClient.create()) {
    *   TransferProto.ResumeTransferOperationRequest request =
@@ -662,8 +719,11 @@ public final void resumeTransferOperation(TransferProto.ResumeTransferOperationR
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (StorageTransferServiceClient storageTransferServiceClient =
    *     StorageTransferServiceClient.create()) {
    *   TransferProto.RunTransferJobRequest request =
@@ -692,8 +752,11 @@ public final OperationFuture<Empty, TransferTypes.TransferOperation> runTransfer
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (StorageTransferServiceClient storageTransferServiceClient =
    *     StorageTransferServiceClient.create()) {
    *   TransferProto.RunTransferJobRequest request =
@@ -723,8 +786,11 @@ public final OperationFuture<Empty, TransferTypes.TransferOperation> runTransfer
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (StorageTransferServiceClient storageTransferServiceClient =
    *     StorageTransferServiceClient.create()) {
    *   TransferProto.RunTransferJobRequest request =
@@ -751,8 +817,11 @@ public final OperationFuture<Empty, TransferTypes.TransferOperation> runTransfer
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (StorageTransferServiceClient storageTransferServiceClient =
    *     StorageTransferServiceClient.create()) {
    *   String projectId = "projectId-894832108";
@@ -795,8 +864,11 @@ public final TransferTypes.AgentPool createAgentPool(
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (StorageTransferServiceClient storageTransferServiceClient =
    *     StorageTransferServiceClient.create()) {
    *   TransferProto.CreateAgentPoolRequest request =
@@ -824,8 +896,11 @@ public final TransferTypes.AgentPool createAgentPool(
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (StorageTransferServiceClient storageTransferServiceClient =
    *     StorageTransferServiceClient.create()) {
    *   TransferProto.CreateAgentPoolRequest request =
@@ -853,8 +928,11 @@ public final TransferTypes.AgentPool createAgentPool(
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (StorageTransferServiceClient storageTransferServiceClient =
    *     StorageTransferServiceClient.create()) {
    *   TransferTypes.AgentPool agentPool = TransferTypes.AgentPool.newBuilder().build();
@@ -908,8 +986,11 @@ public final TransferTypes.AgentPool updateAgentPool(
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (StorageTransferServiceClient storageTransferServiceClient =
    *     StorageTransferServiceClient.create()) {
    *   TransferProto.UpdateAgentPoolRequest request =
@@ -936,8 +1017,11 @@ public final TransferTypes.AgentPool updateAgentPool(
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (StorageTransferServiceClient storageTransferServiceClient =
    *     StorageTransferServiceClient.create()) {
    *   TransferProto.UpdateAgentPoolRequest request =
@@ -964,8 +1048,11 @@ public final TransferTypes.AgentPool updateAgentPool(
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (StorageTransferServiceClient storageTransferServiceClient =
    *     StorageTransferServiceClient.create()) {
    *   String name = "name3373707";
@@ -989,8 +1076,11 @@ public final TransferTypes.AgentPool getAgentPool(String name) {
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (StorageTransferServiceClient storageTransferServiceClient =
    *     StorageTransferServiceClient.create()) {
    *   TransferProto.GetAgentPoolRequest request =
@@ -1013,8 +1103,11 @@ public final TransferTypes.AgentPool getAgentPool(TransferProto.GetAgentPoolRequ
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (StorageTransferServiceClient storageTransferServiceClient =
    *     StorageTransferServiceClient.create()) {
    *   TransferProto.GetAgentPoolRequest request =
@@ -1038,8 +1131,11 @@ public final TransferTypes.AgentPool getAgentPool(TransferProto.GetAgentPoolRequ
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (StorageTransferServiceClient storageTransferServiceClient =
    *     StorageTransferServiceClient.create()) {
    *   String projectId = "projectId-894832108";
@@ -1066,8 +1162,11 @@ public final ListAgentPoolsPagedResponse listAgentPools(String projectId) {
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (StorageTransferServiceClient storageTransferServiceClient =
    *     StorageTransferServiceClient.create()) {
    *   TransferProto.ListAgentPoolsRequest request =
@@ -1099,8 +1198,11 @@ public final ListAgentPoolsPagedResponse listAgentPools(
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (StorageTransferServiceClient storageTransferServiceClient =
    *     StorageTransferServiceClient.create()) {
    *   TransferProto.ListAgentPoolsRequest request =
@@ -1131,8 +1233,11 @@ public final ListAgentPoolsPagedResponse listAgentPools(
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (StorageTransferServiceClient storageTransferServiceClient =
    *     StorageTransferServiceClient.create()) {
    *   TransferProto.ListAgentPoolsRequest request =
@@ -1171,8 +1276,11 @@ public final ListAgentPoolsPagedResponse listAgentPools(
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (StorageTransferServiceClient storageTransferServiceClient =
    *     StorageTransferServiceClient.create()) {
    *   String name = "name3373707";
@@ -1196,8 +1304,11 @@ public final void deleteAgentPool(String name) {
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (StorageTransferServiceClient storageTransferServiceClient =
    *     StorageTransferServiceClient.create()) {
    *   TransferProto.DeleteAgentPoolRequest request =
@@ -1220,8 +1331,11 @@ public final void deleteAgentPool(TransferProto.DeleteAgentPoolRequest request)
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (StorageTransferServiceClient storageTransferServiceClient =
    *     StorageTransferServiceClient.create()) {
    *   TransferProto.DeleteAgentPoolRequest request =
diff --git a/java-storage-transfer/google-cloud-storage-transfer/src/main/java/com/google/storagetransfer/v1/proto/StorageTransferServiceSettings.java b/java-storage-transfer/google-cloud-storage-transfer/src/main/java/com/google/storagetransfer/v1/proto/StorageTransferServiceSettings.java
index 416b45b5a98c..836ccd5aa290 100644
--- a/java-storage-transfer/google-cloud-storage-transfer/src/main/java/com/google/storagetransfer/v1/proto/StorageTransferServiceSettings.java
+++ b/java-storage-transfer/google-cloud-storage-transfer/src/main/java/com/google/storagetransfer/v1/proto/StorageTransferServiceSettings.java
@@ -58,8 +58,11 @@
  * <p>For example, to set the total timeout of getGoogleServiceAccount to 30 seconds:
  *
  * <pre>{@code
- * // This snippet has been automatically generated for illustrative purposes only.
- * // It may require modifications to work in your environment.
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
  * StorageTransferServiceSettings.Builder storageTransferServiceSettingsBuilder =
  *     StorageTransferServiceSettings.newBuilder();
  * storageTransferServiceSettingsBuilder
diff --git a/java-storage-transfer/google-cloud-storage-transfer/src/main/java/com/google/storagetransfer/v1/proto/package-info.java b/java-storage-transfer/google-cloud-storage-transfer/src/main/java/com/google/storagetransfer/v1/proto/package-info.java
index 03e28de8bdcd..5cdc64f5a185 100644
--- a/java-storage-transfer/google-cloud-storage-transfer/src/main/java/com/google/storagetransfer/v1/proto/package-info.java
+++ b/java-storage-transfer/google-cloud-storage-transfer/src/main/java/com/google/storagetransfer/v1/proto/package-info.java
@@ -27,8 +27,11 @@
  * <p>Sample for StorageTransferServiceClient:
  *
  * <pre>{@code
- * // This snippet has been automatically generated for illustrative purposes only.
- * // It may require modifications to work in your environment.
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
  * try (StorageTransferServiceClient storageTransferServiceClient =
  *     StorageTransferServiceClient.create()) {
  *   TransferProto.GetGoogleServiceAccountRequest request =
diff --git a/java-storage-transfer/google-cloud-storage-transfer/src/main/java/com/google/storagetransfer/v1/proto/stub/HttpJsonStorageTransferServiceStub.java b/java-storage-transfer/google-cloud-storage-transfer/src/main/java/com/google/storagetransfer/v1/proto/stub/HttpJsonStorageTransferServiceStub.java
index 6c54b9352761..71716f83661a 100644
--- a/java-storage-transfer/google-cloud-storage-transfer/src/main/java/com/google/storagetransfer/v1/proto/stub/HttpJsonStorageTransferServiceStub.java
+++ b/java-storage-transfer/google-cloud-storage-transfer/src/main/java/com/google/storagetransfer/v1/proto/stub/HttpJsonStorageTransferServiceStub.java
@@ -129,7 +129,7 @@ public class HttpJsonStorageTransferServiceStub extends StorageTransferServiceSt
                       .setRequestBodyExtractor(
                           request ->
                               ProtoRestSerializer.create()
-                                  .toBody("transferJob", request.getTransferJob()))
+                                  .toBody("transferJob", request.getTransferJob(), false))
                       .build())
               .setResponseParser(
                   ProtoMessageResponseParser.<TransferTypes.TransferJob>newBuilder()
@@ -168,7 +168,7 @@ public class HttpJsonStorageTransferServiceStub extends StorageTransferServiceSt
                       .setRequestBodyExtractor(
                           request ->
                               ProtoRestSerializer.create()
-                                  .toBody("*", request.toBuilder().clearJobName().build()))
+                                  .toBody("*", request.toBuilder().clearJobName().build(), false))
                       .build())
               .setResponseParser(
                   ProtoMessageResponseParser.<TransferTypes.TransferJob>newBuilder()
@@ -282,7 +282,7 @@ public class HttpJsonStorageTransferServiceStub extends StorageTransferServiceSt
                       .setRequestBodyExtractor(
                           request ->
                               ProtoRestSerializer.create()
-                                  .toBody("*", request.toBuilder().clearName().build()))
+                                  .toBody("*", request.toBuilder().clearName().build(), false))
                       .build())
               .setResponseParser(
                   ProtoMessageResponseParser.<Empty>newBuilder()
@@ -320,7 +320,7 @@ public class HttpJsonStorageTransferServiceStub extends StorageTransferServiceSt
                       .setRequestBodyExtractor(
                           request ->
                               ProtoRestSerializer.create()
-                                  .toBody("*", request.toBuilder().clearName().build()))
+                                  .toBody("*", request.toBuilder().clearName().build(), false))
                       .build())
               .setResponseParser(
                   ProtoMessageResponseParser.<Empty>newBuilder()
@@ -356,7 +356,7 @@ public class HttpJsonStorageTransferServiceStub extends StorageTransferServiceSt
                       .setRequestBodyExtractor(
                           request ->
                               ProtoRestSerializer.create()
-                                  .toBody("*", request.toBuilder().clearJobName().build()))
+                                  .toBody("*", request.toBuilder().clearJobName().build(), false))
                       .build())
               .setResponseParser(
                   ProtoMessageResponseParser.<Operation>newBuilder()
@@ -399,7 +399,7 @@ public class HttpJsonStorageTransferServiceStub extends StorageTransferServiceSt
                       .setRequestBodyExtractor(
                           request ->
                               ProtoRestSerializer.create()
-                                  .toBody("agentPool", request.getAgentPool()))
+                                  .toBody("agentPool", request.getAgentPool(), false))
                       .build())
               .setResponseParser(
                   ProtoMessageResponseParser.<TransferTypes.AgentPool>newBuilder()
@@ -439,7 +439,7 @@ public class HttpJsonStorageTransferServiceStub extends StorageTransferServiceSt
                       .setRequestBodyExtractor(
                           request ->
                               ProtoRestSerializer.create()
-                                  .toBody("agentPool", request.getAgentPool()))
+                                  .toBody("agentPool", request.getAgentPool(), false))
                       .build())
               .setResponseParser(
                   ProtoMessageResponseParser.<TransferTypes.AgentPool>newBuilder()
diff --git a/java-storage-transfer/google-cloud-storage-transfer/src/main/java/com/google/storagetransfer/v1/proto/stub/StorageTransferServiceStubSettings.java b/java-storage-transfer/google-cloud-storage-transfer/src/main/java/com/google/storagetransfer/v1/proto/stub/StorageTransferServiceStubSettings.java
index ad291313ba79..fbe46e7fe59b 100644
--- a/java-storage-transfer/google-cloud-storage-transfer/src/main/java/com/google/storagetransfer/v1/proto/stub/StorageTransferServiceStubSettings.java
+++ b/java-storage-transfer/google-cloud-storage-transfer/src/main/java/com/google/storagetransfer/v1/proto/stub/StorageTransferServiceStubSettings.java
@@ -80,8 +80,11 @@
  * <p>For example, to set the total timeout of getGoogleServiceAccount to 30 seconds:
  *
  * <pre>{@code
- * // This snippet has been automatically generated for illustrative purposes only.
- * // It may require modifications to work in your environment.
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
  * StorageTransferServiceStubSettings.Builder storageTransferServiceSettingsBuilder =
  *     StorageTransferServiceStubSettings.newBuilder();
  * storageTransferServiceSettingsBuilder