diff --git a/java-essential-contacts/google-cloud-essential-contacts/src/main/java/com/google/cloud/essentialcontacts/v1/EssentialContactsServiceClient.java b/java-essential-contacts/google-cloud-essential-contacts/src/main/java/com/google/cloud/essentialcontacts/v1/EssentialContactsServiceClient.java
index 834b4f5be24c..fb00e42c5dbd 100644
--- a/java-essential-contacts/google-cloud-essential-contacts/src/main/java/com/google/cloud/essentialcontacts/v1/EssentialContactsServiceClient.java
+++ b/java-essential-contacts/google-cloud-essential-contacts/src/main/java/com/google/cloud/essentialcontacts/v1/EssentialContactsServiceClient.java
@@ -42,8 +42,11 @@
  * 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 (EssentialContactsServiceClient essentialContactsServiceClient =
  *     EssentialContactsServiceClient.create()) {
  *   FolderName parent = FolderName.of("[FOLDER]");
@@ -82,8 +85,11 @@
  * <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
  * EssentialContactsServiceSettings essentialContactsServiceSettings =
  *     EssentialContactsServiceSettings.newBuilder()
  *         .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
@@ -95,8 +101,11 @@
  * <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
  * EssentialContactsServiceSettings essentialContactsServiceSettings =
  *     EssentialContactsServiceSettings.newBuilder().setEndpoint(myEndpoint).build();
  * EssentialContactsServiceClient essentialContactsServiceClient =
@@ -107,8 +116,11 @@
  * 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
  * EssentialContactsServiceSettings essentialContactsServiceSettings =
  *     EssentialContactsServiceSettings.newBuilder()
  *         .setTransportChannelProvider(
@@ -179,8 +191,11 @@ public EssentialContactsServiceStub getStub() {
    * <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 (EssentialContactsServiceClient essentialContactsServiceClient =
    *     EssentialContactsServiceClient.create()) {
    *   FolderName parent = FolderName.of("[FOLDER]");
@@ -210,8 +225,11 @@ public final Contact createContact(FolderName parent, Contact contact) {
    * <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 (EssentialContactsServiceClient essentialContactsServiceClient =
    *     EssentialContactsServiceClient.create()) {
    *   OrganizationName parent = OrganizationName.of("[ORGANIZATION]");
@@ -241,8 +259,11 @@ public final Contact createContact(OrganizationName parent, Contact contact) {
    * <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 (EssentialContactsServiceClient essentialContactsServiceClient =
    *     EssentialContactsServiceClient.create()) {
    *   ProjectName parent = ProjectName.of("[PROJECT]");
@@ -272,8 +293,11 @@ public final Contact createContact(ProjectName parent, Contact contact) {
    * <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 (EssentialContactsServiceClient essentialContactsServiceClient =
    *     EssentialContactsServiceClient.create()) {
    *   String parent = ProjectName.of("[PROJECT]").toString();
@@ -300,8 +324,11 @@ public final Contact createContact(String parent, Contact contact) {
    * <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 (EssentialContactsServiceClient essentialContactsServiceClient =
    *     EssentialContactsServiceClient.create()) {
    *   CreateContactRequest request =
@@ -327,8 +354,11 @@ public final Contact createContact(CreateContactRequest 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 (EssentialContactsServiceClient essentialContactsServiceClient =
    *     EssentialContactsServiceClient.create()) {
    *   CreateContactRequest request =
@@ -354,8 +384,11 @@ public final UnaryCallable<CreateContactRequest, Contact> createContactCallable(
    * <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 (EssentialContactsServiceClient essentialContactsServiceClient =
    *     EssentialContactsServiceClient.create()) {
    *   Contact contact = Contact.newBuilder().build();
@@ -384,8 +417,11 @@ public final Contact updateContact(Contact contact, FieldMask updateMask) {
    * <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 (EssentialContactsServiceClient essentialContactsServiceClient =
    *     EssentialContactsServiceClient.create()) {
    *   UpdateContactRequest request =
@@ -411,8 +447,11 @@ public final Contact updateContact(UpdateContactRequest 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 (EssentialContactsServiceClient essentialContactsServiceClient =
    *     EssentialContactsServiceClient.create()) {
    *   UpdateContactRequest request =
@@ -438,8 +477,11 @@ public final UnaryCallable<UpdateContactRequest, Contact> updateContactCallable(
    * <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 (EssentialContactsServiceClient essentialContactsServiceClient =
    *     EssentialContactsServiceClient.create()) {
    *   FolderName parent = FolderName.of("[FOLDER]");
@@ -468,8 +510,11 @@ public final ListContactsPagedResponse listContacts(FolderName parent) {
    * <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 (EssentialContactsServiceClient essentialContactsServiceClient =
    *     EssentialContactsServiceClient.create()) {
    *   OrganizationName parent = OrganizationName.of("[ORGANIZATION]");
@@ -498,8 +543,11 @@ public final ListContactsPagedResponse listContacts(OrganizationName parent) {
    * <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 (EssentialContactsServiceClient essentialContactsServiceClient =
    *     EssentialContactsServiceClient.create()) {
    *   ProjectName parent = ProjectName.of("[PROJECT]");
@@ -528,8 +576,11 @@ public final ListContactsPagedResponse listContacts(ProjectName parent) {
    * <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 (EssentialContactsServiceClient essentialContactsServiceClient =
    *     EssentialContactsServiceClient.create()) {
    *   String parent = ProjectName.of("[PROJECT]").toString();
@@ -555,8 +606,11 @@ public final ListContactsPagedResponse listContacts(String parent) {
    * <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 (EssentialContactsServiceClient essentialContactsServiceClient =
    *     EssentialContactsServiceClient.create()) {
    *   ListContactsRequest request =
@@ -585,8 +639,11 @@ public final ListContactsPagedResponse listContacts(ListContactsRequest 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 (EssentialContactsServiceClient essentialContactsServiceClient =
    *     EssentialContactsServiceClient.create()) {
    *   ListContactsRequest request =
@@ -616,8 +673,11 @@ public final ListContactsPagedResponse listContacts(ListContactsRequest 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 (EssentialContactsServiceClient essentialContactsServiceClient =
    *     EssentialContactsServiceClient.create()) {
    *   ListContactsRequest request =
@@ -653,8 +713,11 @@ public final UnaryCallable<ListContactsRequest, ListContactsResponse> listContac
    * <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 (EssentialContactsServiceClient essentialContactsServiceClient =
    *     EssentialContactsServiceClient.create()) {
    *   ContactName name = ContactName.ofProjectContactName("[PROJECT]", "[CONTACT]");
@@ -680,8 +743,11 @@ public final Contact getContact(ContactName 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 (EssentialContactsServiceClient essentialContactsServiceClient =
    *     EssentialContactsServiceClient.create()) {
    *   String name = ContactName.ofProjectContactName("[PROJECT]", "[CONTACT]").toString();
@@ -706,8 +772,11 @@ public final Contact getContact(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 (EssentialContactsServiceClient essentialContactsServiceClient =
    *     EssentialContactsServiceClient.create()) {
    *   GetContactRequest request =
@@ -732,8 +801,11 @@ public final Contact getContact(GetContactRequest 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 (EssentialContactsServiceClient essentialContactsServiceClient =
    *     EssentialContactsServiceClient.create()) {
    *   GetContactRequest request =
@@ -758,8 +830,11 @@ public final UnaryCallable<GetContactRequest, Contact> getContactCallable() {
    * <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 (EssentialContactsServiceClient essentialContactsServiceClient =
    *     EssentialContactsServiceClient.create()) {
    *   ContactName name = ContactName.ofProjectContactName("[PROJECT]", "[CONTACT]");
@@ -785,8 +860,11 @@ public final void deleteContact(ContactName 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 (EssentialContactsServiceClient essentialContactsServiceClient =
    *     EssentialContactsServiceClient.create()) {
    *   String name = ContactName.ofProjectContactName("[PROJECT]", "[CONTACT]").toString();
@@ -811,8 +889,11 @@ public final void deleteContact(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 (EssentialContactsServiceClient essentialContactsServiceClient =
    *     EssentialContactsServiceClient.create()) {
    *   DeleteContactRequest request =
@@ -837,8 +918,11 @@ public final void deleteContact(DeleteContactRequest 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 (EssentialContactsServiceClient essentialContactsServiceClient =
    *     EssentialContactsServiceClient.create()) {
    *   DeleteContactRequest request =
@@ -864,8 +948,11 @@ public final UnaryCallable<DeleteContactRequest, Empty> deleteContactCallable()
    * <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 (EssentialContactsServiceClient essentialContactsServiceClient =
    *     EssentialContactsServiceClient.create()) {
    *   ComputeContactsRequest request =
@@ -896,8 +983,11 @@ public final ComputeContactsPagedResponse computeContacts(ComputeContactsRequest
    * <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 (EssentialContactsServiceClient essentialContactsServiceClient =
    *     EssentialContactsServiceClient.create()) {
    *   ComputeContactsRequest request =
@@ -929,8 +1019,11 @@ public final ComputeContactsPagedResponse computeContacts(ComputeContactsRequest
    * <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 (EssentialContactsServiceClient essentialContactsServiceClient =
    *     EssentialContactsServiceClient.create()) {
    *   ComputeContactsRequest request =
@@ -969,8 +1062,11 @@ public final ComputeContactsPagedResponse computeContacts(ComputeContactsRequest
    * <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 (EssentialContactsServiceClient essentialContactsServiceClient =
    *     EssentialContactsServiceClient.create()) {
    *   SendTestMessageRequest request =
@@ -998,8 +1094,11 @@ public final void sendTestMessage(SendTestMessageRequest 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 (EssentialContactsServiceClient essentialContactsServiceClient =
    *     EssentialContactsServiceClient.create()) {
    *   SendTestMessageRequest request =
diff --git a/java-essential-contacts/google-cloud-essential-contacts/src/main/java/com/google/cloud/essentialcontacts/v1/EssentialContactsServiceSettings.java b/java-essential-contacts/google-cloud-essential-contacts/src/main/java/com/google/cloud/essentialcontacts/v1/EssentialContactsServiceSettings.java
index 3df497eb6ffc..813cc1690037 100644
--- a/java-essential-contacts/google-cloud-essential-contacts/src/main/java/com/google/cloud/essentialcontacts/v1/EssentialContactsServiceSettings.java
+++ b/java-essential-contacts/google-cloud-essential-contacts/src/main/java/com/google/cloud/essentialcontacts/v1/EssentialContactsServiceSettings.java
@@ -56,8 +56,11 @@
  * <p>For example, to set the total timeout of createContact 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
  * EssentialContactsServiceSettings.Builder essentialContactsServiceSettingsBuilder =
  *     EssentialContactsServiceSettings.newBuilder();
  * essentialContactsServiceSettingsBuilder
diff --git a/java-essential-contacts/google-cloud-essential-contacts/src/main/java/com/google/cloud/essentialcontacts/v1/package-info.java b/java-essential-contacts/google-cloud-essential-contacts/src/main/java/com/google/cloud/essentialcontacts/v1/package-info.java
index 102cd2916700..dfb98ed54d42 100644
--- a/java-essential-contacts/google-cloud-essential-contacts/src/main/java/com/google/cloud/essentialcontacts/v1/package-info.java
+++ b/java-essential-contacts/google-cloud-essential-contacts/src/main/java/com/google/cloud/essentialcontacts/v1/package-info.java
@@ -24,8 +24,11 @@
  * <p>Sample for EssentialContactsServiceClient:
  *
  * <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 (EssentialContactsServiceClient essentialContactsServiceClient =
  *     EssentialContactsServiceClient.create()) {
  *   FolderName parent = FolderName.of("[FOLDER]");
diff --git a/java-essential-contacts/google-cloud-essential-contacts/src/main/java/com/google/cloud/essentialcontacts/v1/stub/EssentialContactsServiceStubSettings.java b/java-essential-contacts/google-cloud-essential-contacts/src/main/java/com/google/cloud/essentialcontacts/v1/stub/EssentialContactsServiceStubSettings.java
index b18b95a3a8da..b97b54f5550a 100644
--- a/java-essential-contacts/google-cloud-essential-contacts/src/main/java/com/google/cloud/essentialcontacts/v1/stub/EssentialContactsServiceStubSettings.java
+++ b/java-essential-contacts/google-cloud-essential-contacts/src/main/java/com/google/cloud/essentialcontacts/v1/stub/EssentialContactsServiceStubSettings.java
@@ -83,8 +83,11 @@
  * <p>For example, to set the total timeout of createContact 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
  * EssentialContactsServiceStubSettings.Builder essentialContactsServiceSettingsBuilder =
  *     EssentialContactsServiceStubSettings.newBuilder();
  * essentialContactsServiceSettingsBuilder
diff --git a/java-essential-contacts/google-cloud-essential-contacts/src/main/java/com/google/cloud/essentialcontacts/v1/stub/HttpJsonEssentialContactsServiceStub.java b/java-essential-contacts/google-cloud-essential-contacts/src/main/java/com/google/cloud/essentialcontacts/v1/stub/HttpJsonEssentialContactsServiceStub.java
index 07f8f53164f0..d43211585874 100644
--- a/java-essential-contacts/google-cloud-essential-contacts/src/main/java/com/google/cloud/essentialcontacts/v1/stub/HttpJsonEssentialContactsServiceStub.java
+++ b/java-essential-contacts/google-cloud-essential-contacts/src/main/java/com/google/cloud/essentialcontacts/v1/stub/HttpJsonEssentialContactsServiceStub.java
@@ -92,7 +92,8 @@ public class HttpJsonEssentialContactsServiceStub extends EssentialContactsServi
                           })
                       .setRequestBodyExtractor(
                           request ->
-                              ProtoRestSerializer.create().toBody("contact", request.getContact()))
+                              ProtoRestSerializer.create()
+                                  .toBody("contact", request.getContact(), false))
                       .build())
               .setResponseParser(
                   ProtoMessageResponseParser.<Contact>newBuilder()
@@ -133,7 +134,8 @@ public class HttpJsonEssentialContactsServiceStub extends EssentialContactsServi
                           })
                       .setRequestBodyExtractor(
                           request ->
-                              ProtoRestSerializer.create().toBody("contact", request.getContact()))
+                              ProtoRestSerializer.create()
+                                  .toBody("contact", request.getContact(), false))
                       .build())
               .setResponseParser(
                   ProtoMessageResponseParser.<Contact>newBuilder()
@@ -327,7 +329,7 @@ public class HttpJsonEssentialContactsServiceStub extends EssentialContactsServi
                       .setRequestBodyExtractor(
                           request ->
                               ProtoRestSerializer.create()
-                                  .toBody("*", request.toBuilder().clearResource().build()))
+                                  .toBody("*", request.toBuilder().clearResource().build(), false))
                       .build())
               .setResponseParser(
                   ProtoMessageResponseParser.<Empty>newBuilder()
diff --git a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/computecontacts/AsyncComputeContacts.java b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/computecontacts/AsyncComputeContacts.java
index a699973263e0..cde854395428 100644
--- a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/computecontacts/AsyncComputeContacts.java
+++ b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/computecontacts/AsyncComputeContacts.java
@@ -32,8 +32,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void asyncComputeContacts() throws Exception {
-    // 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 (EssentialContactsServiceClient essentialContactsServiceClient =
         EssentialContactsServiceClient.create()) {
       ComputeContactsRequest request =
diff --git a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/computecontacts/AsyncComputeContactsPaged.java b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/computecontacts/AsyncComputeContactsPaged.java
index 9cbff70bdf1b..2310045a7615 100644
--- a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/computecontacts/AsyncComputeContactsPaged.java
+++ b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/computecontacts/AsyncComputeContactsPaged.java
@@ -33,8 +33,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void asyncComputeContactsPaged() throws Exception {
-    // 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 (EssentialContactsServiceClient essentialContactsServiceClient =
         EssentialContactsServiceClient.create()) {
       ComputeContactsRequest request =
diff --git a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/computecontacts/SyncComputeContacts.java b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/computecontacts/SyncComputeContacts.java
index 3370b1e0b624..10e3f8ab3848 100644
--- a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/computecontacts/SyncComputeContacts.java
+++ b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/computecontacts/SyncComputeContacts.java
@@ -31,8 +31,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncComputeContacts() throws Exception {
-    // 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 (EssentialContactsServiceClient essentialContactsServiceClient =
         EssentialContactsServiceClient.create()) {
       ComputeContactsRequest request =
diff --git a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/create/SyncCreateSetCredentialsProvider.java b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/create/SyncCreateSetCredentialsProvider.java
index caab616a5f40..44fd087407aa 100644
--- a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/create/SyncCreateSetCredentialsProvider.java
+++ b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/create/SyncCreateSetCredentialsProvider.java
@@ -29,8 +29,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncCreateSetCredentialsProvider() throws Exception {
-    // 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
     EssentialContactsServiceSettings essentialContactsServiceSettings =
         EssentialContactsServiceSettings.newBuilder()
             .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
diff --git a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/create/SyncCreateSetCredentialsProvider1.java b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/create/SyncCreateSetCredentialsProvider1.java
index 8dce5d59672c..09a5ad254b2b 100644
--- a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/create/SyncCreateSetCredentialsProvider1.java
+++ b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/create/SyncCreateSetCredentialsProvider1.java
@@ -27,8 +27,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncCreateSetCredentialsProvider1() throws Exception {
-    // 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
     EssentialContactsServiceSettings essentialContactsServiceSettings =
         EssentialContactsServiceSettings.newBuilder()
             .setTransportChannelProvider(
diff --git a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/create/SyncCreateSetEndpoint.java b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/create/SyncCreateSetEndpoint.java
index 05091ff9fbaa..02651322b488 100644
--- a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/create/SyncCreateSetEndpoint.java
+++ b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/create/SyncCreateSetEndpoint.java
@@ -28,8 +28,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncCreateSetEndpoint() throws Exception {
-    // 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
     EssentialContactsServiceSettings essentialContactsServiceSettings =
         EssentialContactsServiceSettings.newBuilder().setEndpoint(myEndpoint).build();
     EssentialContactsServiceClient essentialContactsServiceClient =
diff --git a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/createcontact/AsyncCreateContact.java b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/createcontact/AsyncCreateContact.java
index 43dd6f65b127..8e190bae2322 100644
--- a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/createcontact/AsyncCreateContact.java
+++ b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/createcontact/AsyncCreateContact.java
@@ -30,8 +30,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void asyncCreateContact() throws Exception {
-    // 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 (EssentialContactsServiceClient essentialContactsServiceClient =
         EssentialContactsServiceClient.create()) {
       CreateContactRequest request =
diff --git a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/createcontact/SyncCreateContact.java b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/createcontact/SyncCreateContact.java
index c117c0258aff..affdf6cb7260 100644
--- a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/createcontact/SyncCreateContact.java
+++ b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/createcontact/SyncCreateContact.java
@@ -29,8 +29,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncCreateContact() throws Exception {
-    // 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 (EssentialContactsServiceClient essentialContactsServiceClient =
         EssentialContactsServiceClient.create()) {
       CreateContactRequest request =
diff --git a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/createcontact/SyncCreateContactFoldernameContact.java b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/createcontact/SyncCreateContactFoldernameContact.java
index f9d91f511321..bfbf9422a3e8 100644
--- a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/createcontact/SyncCreateContactFoldernameContact.java
+++ b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/createcontact/SyncCreateContactFoldernameContact.java
@@ -28,8 +28,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncCreateContactFoldernameContact() throws Exception {
-    // 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 (EssentialContactsServiceClient essentialContactsServiceClient =
         EssentialContactsServiceClient.create()) {
       FolderName parent = FolderName.of("[FOLDER]");
diff --git a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/createcontact/SyncCreateContactOrganizationnameContact.java b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/createcontact/SyncCreateContactOrganizationnameContact.java
index 46126597f572..185b8632f39f 100644
--- a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/createcontact/SyncCreateContactOrganizationnameContact.java
+++ b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/createcontact/SyncCreateContactOrganizationnameContact.java
@@ -28,8 +28,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncCreateContactOrganizationnameContact() throws Exception {
-    // 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 (EssentialContactsServiceClient essentialContactsServiceClient =
         EssentialContactsServiceClient.create()) {
       OrganizationName parent = OrganizationName.of("[ORGANIZATION]");
diff --git a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/createcontact/SyncCreateContactProjectnameContact.java b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/createcontact/SyncCreateContactProjectnameContact.java
index 5e1c4aaba798..2980146ce6a4 100644
--- a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/createcontact/SyncCreateContactProjectnameContact.java
+++ b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/createcontact/SyncCreateContactProjectnameContact.java
@@ -28,8 +28,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncCreateContactProjectnameContact() throws Exception {
-    // 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 (EssentialContactsServiceClient essentialContactsServiceClient =
         EssentialContactsServiceClient.create()) {
       ProjectName parent = ProjectName.of("[PROJECT]");
diff --git a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/createcontact/SyncCreateContactStringContact.java b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/createcontact/SyncCreateContactStringContact.java
index 1d6e08a72b4e..e5f56ba94f8b 100644
--- a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/createcontact/SyncCreateContactStringContact.java
+++ b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/createcontact/SyncCreateContactStringContact.java
@@ -28,8 +28,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncCreateContactStringContact() throws Exception {
-    // 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 (EssentialContactsServiceClient essentialContactsServiceClient =
         EssentialContactsServiceClient.create()) {
       String parent = ProjectName.of("[PROJECT]").toString();
diff --git a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/deletecontact/AsyncDeleteContact.java b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/deletecontact/AsyncDeleteContact.java
index a4a14638b33d..dc1b016211d8 100644
--- a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/deletecontact/AsyncDeleteContact.java
+++ b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/deletecontact/AsyncDeleteContact.java
@@ -30,8 +30,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void asyncDeleteContact() throws Exception {
-    // 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 (EssentialContactsServiceClient essentialContactsServiceClient =
         EssentialContactsServiceClient.create()) {
       DeleteContactRequest request =
diff --git a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/deletecontact/SyncDeleteContact.java b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/deletecontact/SyncDeleteContact.java
index dcb7e7e9af3c..f85fa904c7eb 100644
--- a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/deletecontact/SyncDeleteContact.java
+++ b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/deletecontact/SyncDeleteContact.java
@@ -29,8 +29,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncDeleteContact() throws Exception {
-    // 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 (EssentialContactsServiceClient essentialContactsServiceClient =
         EssentialContactsServiceClient.create()) {
       DeleteContactRequest request =
diff --git a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/deletecontact/SyncDeleteContactContactname.java b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/deletecontact/SyncDeleteContactContactname.java
index 1dd3515fd1c7..226b01598ec2 100644
--- a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/deletecontact/SyncDeleteContactContactname.java
+++ b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/deletecontact/SyncDeleteContactContactname.java
@@ -28,8 +28,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncDeleteContactContactname() throws Exception {
-    // 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 (EssentialContactsServiceClient essentialContactsServiceClient =
         EssentialContactsServiceClient.create()) {
       ContactName name = ContactName.ofProjectContactName("[PROJECT]", "[CONTACT]");
diff --git a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/deletecontact/SyncDeleteContactString.java b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/deletecontact/SyncDeleteContactString.java
index d1139565fa1d..2da4909de415 100644
--- a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/deletecontact/SyncDeleteContactString.java
+++ b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/deletecontact/SyncDeleteContactString.java
@@ -28,8 +28,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncDeleteContactString() throws Exception {
-    // 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 (EssentialContactsServiceClient essentialContactsServiceClient =
         EssentialContactsServiceClient.create()) {
       String name = ContactName.ofProjectContactName("[PROJECT]", "[CONTACT]").toString();
diff --git a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/getcontact/AsyncGetContact.java b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/getcontact/AsyncGetContact.java
index bd801b5b9e45..a61636ce5f4c 100644
--- a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/getcontact/AsyncGetContact.java
+++ b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/getcontact/AsyncGetContact.java
@@ -30,8 +30,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void asyncGetContact() throws Exception {
-    // 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 (EssentialContactsServiceClient essentialContactsServiceClient =
         EssentialContactsServiceClient.create()) {
       GetContactRequest request =
diff --git a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/getcontact/SyncGetContact.java b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/getcontact/SyncGetContact.java
index afc62f2c16e3..e9fe54a069f8 100644
--- a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/getcontact/SyncGetContact.java
+++ b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/getcontact/SyncGetContact.java
@@ -29,8 +29,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncGetContact() throws Exception {
-    // 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 (EssentialContactsServiceClient essentialContactsServiceClient =
         EssentialContactsServiceClient.create()) {
       GetContactRequest request =
diff --git a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/getcontact/SyncGetContactContactname.java b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/getcontact/SyncGetContactContactname.java
index 0b90828ec280..1d3fe8993727 100644
--- a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/getcontact/SyncGetContactContactname.java
+++ b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/getcontact/SyncGetContactContactname.java
@@ -28,8 +28,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncGetContactContactname() throws Exception {
-    // 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 (EssentialContactsServiceClient essentialContactsServiceClient =
         EssentialContactsServiceClient.create()) {
       ContactName name = ContactName.ofProjectContactName("[PROJECT]", "[CONTACT]");
diff --git a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/getcontact/SyncGetContactString.java b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/getcontact/SyncGetContactString.java
index a0bac03b11e9..66878db73fe5 100644
--- a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/getcontact/SyncGetContactString.java
+++ b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/getcontact/SyncGetContactString.java
@@ -28,8 +28,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncGetContactString() throws Exception {
-    // 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 (EssentialContactsServiceClient essentialContactsServiceClient =
         EssentialContactsServiceClient.create()) {
       String name = ContactName.ofProjectContactName("[PROJECT]", "[CONTACT]").toString();
diff --git a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/listcontacts/AsyncListContacts.java b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/listcontacts/AsyncListContacts.java
index 9d422ba37380..2d5084f7ea9f 100644
--- a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/listcontacts/AsyncListContacts.java
+++ b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/listcontacts/AsyncListContacts.java
@@ -30,8 +30,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void asyncListContacts() throws Exception {
-    // 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 (EssentialContactsServiceClient essentialContactsServiceClient =
         EssentialContactsServiceClient.create()) {
       ListContactsRequest request =
diff --git a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/listcontacts/AsyncListContactsPaged.java b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/listcontacts/AsyncListContactsPaged.java
index 96bd8003045d..f47488aae8a6 100644
--- a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/listcontacts/AsyncListContactsPaged.java
+++ b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/listcontacts/AsyncListContactsPaged.java
@@ -31,8 +31,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void asyncListContactsPaged() throws Exception {
-    // 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 (EssentialContactsServiceClient essentialContactsServiceClient =
         EssentialContactsServiceClient.create()) {
       ListContactsRequest request =
diff --git a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/listcontacts/SyncListContacts.java b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/listcontacts/SyncListContacts.java
index a885f0252d10..e7669a9b858c 100644
--- a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/listcontacts/SyncListContacts.java
+++ b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/listcontacts/SyncListContacts.java
@@ -29,8 +29,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncListContacts() throws Exception {
-    // 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 (EssentialContactsServiceClient essentialContactsServiceClient =
         EssentialContactsServiceClient.create()) {
       ListContactsRequest request =
diff --git a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/listcontacts/SyncListContactsFoldername.java b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/listcontacts/SyncListContactsFoldername.java
index d254b248a707..5085ec9c0526 100644
--- a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/listcontacts/SyncListContactsFoldername.java
+++ b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/listcontacts/SyncListContactsFoldername.java
@@ -28,8 +28,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncListContactsFoldername() throws Exception {
-    // 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 (EssentialContactsServiceClient essentialContactsServiceClient =
         EssentialContactsServiceClient.create()) {
       FolderName parent = FolderName.of("[FOLDER]");
diff --git a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/listcontacts/SyncListContactsOrganizationname.java b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/listcontacts/SyncListContactsOrganizationname.java
index 9b7145c8c927..1226f4dc293b 100644
--- a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/listcontacts/SyncListContactsOrganizationname.java
+++ b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/listcontacts/SyncListContactsOrganizationname.java
@@ -28,8 +28,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncListContactsOrganizationname() throws Exception {
-    // 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 (EssentialContactsServiceClient essentialContactsServiceClient =
         EssentialContactsServiceClient.create()) {
       OrganizationName parent = OrganizationName.of("[ORGANIZATION]");
diff --git a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/listcontacts/SyncListContactsProjectname.java b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/listcontacts/SyncListContactsProjectname.java
index 0aa5a9194579..7a2fead0e00f 100644
--- a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/listcontacts/SyncListContactsProjectname.java
+++ b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/listcontacts/SyncListContactsProjectname.java
@@ -28,8 +28,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncListContactsProjectname() throws Exception {
-    // 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 (EssentialContactsServiceClient essentialContactsServiceClient =
         EssentialContactsServiceClient.create()) {
       ProjectName parent = ProjectName.of("[PROJECT]");
diff --git a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/listcontacts/SyncListContactsString.java b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/listcontacts/SyncListContactsString.java
index 825c237e6e7c..c2b527135e84 100644
--- a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/listcontacts/SyncListContactsString.java
+++ b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/listcontacts/SyncListContactsString.java
@@ -28,8 +28,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncListContactsString() throws Exception {
-    // 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 (EssentialContactsServiceClient essentialContactsServiceClient =
         EssentialContactsServiceClient.create()) {
       String parent = ProjectName.of("[PROJECT]").toString();
diff --git a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/sendtestmessage/AsyncSendTestMessage.java b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/sendtestmessage/AsyncSendTestMessage.java
index 7ba269a99c3c..8e83eb835398 100644
--- a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/sendtestmessage/AsyncSendTestMessage.java
+++ b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/sendtestmessage/AsyncSendTestMessage.java
@@ -32,8 +32,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void asyncSendTestMessage() throws Exception {
-    // 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 (EssentialContactsServiceClient essentialContactsServiceClient =
         EssentialContactsServiceClient.create()) {
       SendTestMessageRequest request =
diff --git a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/sendtestmessage/SyncSendTestMessage.java b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/sendtestmessage/SyncSendTestMessage.java
index f9243b2e2899..d1ba5fd0859f 100644
--- a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/sendtestmessage/SyncSendTestMessage.java
+++ b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/sendtestmessage/SyncSendTestMessage.java
@@ -31,8 +31,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncSendTestMessage() throws Exception {
-    // 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 (EssentialContactsServiceClient essentialContactsServiceClient =
         EssentialContactsServiceClient.create()) {
       SendTestMessageRequest request =
diff --git a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/updatecontact/AsyncUpdateContact.java b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/updatecontact/AsyncUpdateContact.java
index 8617fff075bf..c1cdce8a8ba1 100644
--- a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/updatecontact/AsyncUpdateContact.java
+++ b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/updatecontact/AsyncUpdateContact.java
@@ -30,8 +30,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void asyncUpdateContact() throws Exception {
-    // 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 (EssentialContactsServiceClient essentialContactsServiceClient =
         EssentialContactsServiceClient.create()) {
       UpdateContactRequest request =
diff --git a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/updatecontact/SyncUpdateContact.java b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/updatecontact/SyncUpdateContact.java
index d2102a0908ee..ed61289a206d 100644
--- a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/updatecontact/SyncUpdateContact.java
+++ b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/updatecontact/SyncUpdateContact.java
@@ -29,8 +29,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncUpdateContact() throws Exception {
-    // 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 (EssentialContactsServiceClient essentialContactsServiceClient =
         EssentialContactsServiceClient.create()) {
       UpdateContactRequest request =
diff --git a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/updatecontact/SyncUpdateContactContactFieldmask.java b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/updatecontact/SyncUpdateContactContactFieldmask.java
index b80b42093dff..80dd9eb876ae 100644
--- a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/updatecontact/SyncUpdateContactContactFieldmask.java
+++ b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsserviceclient/updatecontact/SyncUpdateContactContactFieldmask.java
@@ -28,8 +28,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncUpdateContactContactFieldmask() throws Exception {
-    // 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 (EssentialContactsServiceClient essentialContactsServiceClient =
         EssentialContactsServiceClient.create()) {
       Contact contact = Contact.newBuilder().build();
diff --git a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsservicesettings/createcontact/SyncCreateContact.java b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsservicesettings/createcontact/SyncCreateContact.java
index 55e546db80df..3da996aa03b3 100644
--- a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsservicesettings/createcontact/SyncCreateContact.java
+++ b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/essentialcontactsservicesettings/createcontact/SyncCreateContact.java
@@ -27,8 +27,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncCreateContact() throws Exception {
-    // 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
     EssentialContactsServiceSettings.Builder essentialContactsServiceSettingsBuilder =
         EssentialContactsServiceSettings.newBuilder();
     essentialContactsServiceSettingsBuilder
diff --git a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/stub/essentialcontactsservicestubsettings/createcontact/SyncCreateContact.java b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/stub/essentialcontactsservicestubsettings/createcontact/SyncCreateContact.java
index 41154f72782e..792f6b4bc831 100644
--- a/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/stub/essentialcontactsservicestubsettings/createcontact/SyncCreateContact.java
+++ b/java-essential-contacts/samples/snippets/generated/com/google/cloud/essentialcontacts/v1/stub/essentialcontactsservicestubsettings/createcontact/SyncCreateContact.java
@@ -27,8 +27,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncCreateContact() throws Exception {
-    // 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
     EssentialContactsServiceStubSettings.Builder essentialContactsServiceSettingsBuilder =
         EssentialContactsServiceStubSettings.newBuilder();
     essentialContactsServiceSettingsBuilder