From f5c8573f006e6c236c8d30dfbb9d0885c51e68b5 Mon Sep 17 00:00:00 2001
From: cloud-java-bot <cloud-java-bot@google.com>
Date: Fri, 5 Dec 2025 02:36:49 +0000
Subject: [PATCH 1/5] chore: Update generation configuration at Fri Dec  5
 02:36:42 UTC 2025

---
 generation_config.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/generation_config.yaml b/generation_config.yaml
index 5963f47a7..31e99a300 100644
--- a/generation_config.yaml
+++ b/generation_config.yaml
@@ -1,5 +1,5 @@
 gapic_generator_version: 2.64.1
-googleapis_commitish: 4667f02b64f2259ef21249b026ced7bb4351c632
+googleapis_commitish: bfdeefc22ce661d0b0efb68c83c2afd5a3aa9c2c
 libraries_bom_version: 26.72.0
 libraries:
   - api_shortname: pubsub

From d338f4e14acee814713811a49d63c3b6f5b0dfd6 Mon Sep 17 00:00:00 2001
From: cloud-java-bot <cloud-java-bot@google.com>
Date: Sat, 6 Dec 2025 02:34:17 +0000
Subject: [PATCH 2/5] chore: Update generation configuration at Sat Dec  6
 02:34:10 UTC 2025

---
 generation_config.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/generation_config.yaml b/generation_config.yaml
index 31e99a300..85f197aaf 100644
--- a/generation_config.yaml
+++ b/generation_config.yaml
@@ -1,5 +1,5 @@
 gapic_generator_version: 2.64.1
-googleapis_commitish: bfdeefc22ce661d0b0efb68c83c2afd5a3aa9c2c
+googleapis_commitish: d534d01c1eefcc9efc7b9182a2b98e9fe5b0922b
 libraries_bom_version: 26.72.0
 libraries:
   - api_shortname: pubsub

From 39f7390af7d01074f92493146db8916f0f1b679f Mon Sep 17 00:00:00 2001
From: cloud-java-bot <cloud-java-bot@google.com>
Date: Sat, 6 Dec 2025 02:38:25 +0000
Subject: [PATCH 3/5] chore: generate libraries at Sat Dec  6 02:34:39 UTC 2025

---
 .../pubsub/v1/SubscriptionAdminClient.java    |  76 ++--
 .../cloud/pubsub/v1/TopicAdminClient.java     |  24 +-
 .../pubsub/v1/CreateSnapshotRequest.java      |  70 ++--
 .../v1/CreateSnapshotRequestOrBuilder.java    |  20 +-
 .../pubsub/v1/DeleteSnapshotRequest.java      |  28 +-
 .../v1/DeleteSnapshotRequestOrBuilder.java    |   8 +-
 .../pubsub/v1/DeleteSubscriptionRequest.java  |  28 +-
 .../DeleteSubscriptionRequestOrBuilder.java   |   8 +-
 .../google/pubsub/v1/DeleteTopicRequest.java  |  28 +-
 .../v1/DeleteTopicRequestOrBuilder.java       |   8 +-
 .../google/pubsub/v1/GetSnapshotRequest.java  |  28 +-
 .../v1/GetSnapshotRequestOrBuilder.java       |   8 +-
 .../pubsub/v1/GetSubscriptionRequest.java     |  28 +-
 .../v1/GetSubscriptionRequestOrBuilder.java   |   8 +-
 .../com/google/pubsub/v1/GetTopicRequest.java |  28 +-
 .../pubsub/v1/GetTopicRequestOrBuilder.java   |   8 +-
 .../pubsub/v1/ListSnapshotsRequest.java       |  28 +-
 .../v1/ListSnapshotsRequestOrBuilder.java     |   8 +-
 .../pubsub/v1/ListSubscriptionsRequest.java   |  42 +--
 .../v1/ListSubscriptionsRequestOrBuilder.java |  12 +-
 .../google/pubsub/v1/ListTopicsRequest.java   |  28 +-
 .../pubsub/v1/ListTopicsRequestOrBuilder.java |   8 +-
 .../com/google/pubsub/v1/PublishRequest.java  |  42 +--
 .../pubsub/v1/PublishRequestOrBuilder.java    |  12 +-
 .../com/google/pubsub/v1/PubsubProto.java     | 349 +++++++++---------
 .../com/google/pubsub/v1/PullRequest.java     |   8 +-
 .../pubsub/v1/PullRequestOrBuilder.java       |   2 +-
 .../com/google/pubsub/v1/Subscription.java    |  42 ++-
 .../pubsub/v1/SubscriptionOrBuilder.java      |  12 +-
 .../main/java/com/google/pubsub/v1/Topic.java |  42 ++-
 .../com/google/pubsub/v1/TopicOrBuilder.java  |  12 +-
 .../main/proto/google/pubsub/v1/pubsub.proto  |  57 ++-
 32 files changed, 584 insertions(+), 526 deletions(-)

diff --git a/google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/v1/SubscriptionAdminClient.java b/google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/v1/SubscriptionAdminClient.java
index f22e3ec16..828bbea14 100644
--- a/google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/v1/SubscriptionAdminClient.java
+++ b/google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/v1/SubscriptionAdminClient.java
@@ -588,7 +588,7 @@ public SubscriberStub getStub() {
    * }
    * }</pre>
    *
-   * @param name Required. The name of the subscription. It must have the format
+   * @param name Required. Identifier. The name of the subscription. It must have the format
    *     `"projects/{project}/subscriptions/{subscription}"`. `{subscription}` must start with a
    *     letter, and contain only letters (`[A-Za-z]`), numbers (`[0-9]`), dashes (`-`), underscores
    *     (`_`), periods (`.`), tildes (`~`), plus (`+`) or percent signs (`%`). It must be between 3
@@ -658,7 +658,7 @@ public final Subscription createSubscription(
    * }
    * }</pre>
    *
-   * @param name Required. The name of the subscription. It must have the format
+   * @param name Required. Identifier. The name of the subscription. It must have the format
    *     `"projects/{project}/subscriptions/{subscription}"`. `{subscription}` must start with a
    *     letter, and contain only letters (`[A-Za-z]`), numbers (`[0-9]`), dashes (`-`), underscores
    *     (`_`), periods (`.`), tildes (`~`), plus (`+`) or percent signs (`%`). It must be between 3
@@ -728,7 +728,7 @@ public final Subscription createSubscription(
    * }
    * }</pre>
    *
-   * @param name Required. The name of the subscription. It must have the format
+   * @param name Required. Identifier. The name of the subscription. It must have the format
    *     `"projects/{project}/subscriptions/{subscription}"`. `{subscription}` must start with a
    *     letter, and contain only letters (`[A-Za-z]`), numbers (`[0-9]`), dashes (`-`), underscores
    *     (`_`), periods (`.`), tildes (`~`), plus (`+`) or percent signs (`%`). It must be between 3
@@ -798,7 +798,7 @@ public final Subscription createSubscription(
    * }
    * }</pre>
    *
-   * @param name Required. The name of the subscription. It must have the format
+   * @param name Required. Identifier. The name of the subscription. It must have the format
    *     `"projects/{project}/subscriptions/{subscription}"`. `{subscription}` must start with a
    *     letter, and contain only letters (`[A-Za-z]`), numbers (`[0-9]`), dashes (`-`), underscores
    *     (`_`), periods (`.`), tildes (`~`), plus (`+`) or percent signs (`%`). It must be between 3
@@ -1179,7 +1179,7 @@ public final UnaryCallable<Subscription, Subscription> createSubscriptionCallabl
    * }
    * }</pre>
    *
-   * @param subscription Required. The name of the subscription to get. Format is
+   * @param subscription Required. Identifier. The name of the subscription to get. Format is
    *     `projects/{project}/subscriptions/{sub}`.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -1209,7 +1209,7 @@ public final Subscription getSubscription(SubscriptionName subscription) {
    * }
    * }</pre>
    *
-   * @param subscription Required. The name of the subscription to get. Format is
+   * @param subscription Required. Identifier. The name of the subscription to get. Format is
    *     `projects/{project}/subscriptions/{sub}`.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -1416,8 +1416,8 @@ public final UnaryCallable<UpdateSubscriptionRequest, Subscription> updateSubscr
    * }
    * }</pre>
    *
-   * @param project Required. The name of the project in which to list subscriptions. Format is
-   *     `projects/{project-id}`.
+   * @param project Required. Identifier. The name of the project in which to list subscriptions.
+   *     Format is `projects/{project-id}`.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
   public final ListSubscriptionsPagedResponse listSubscriptions(ProjectName project) {
@@ -1448,8 +1448,8 @@ public final ListSubscriptionsPagedResponse listSubscriptions(ProjectName projec
    * }
    * }</pre>
    *
-   * @param project Required. The name of the project in which to list subscriptions. Format is
-   *     `projects/{project-id}`.
+   * @param project Required. Identifier. The name of the project in which to list subscriptions.
+   *     Format is `projects/{project-id}`.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
   public final ListSubscriptionsPagedResponse listSubscriptions(String project) {
@@ -1584,7 +1584,7 @@ public final ListSubscriptionsPagedResponse listSubscriptions(ListSubscriptionsR
    * }
    * }</pre>
    *
-   * @param subscription Required. The subscription to delete. Format is
+   * @param subscription Required. Identifier. The subscription to delete. Format is
    *     `projects/{project}/subscriptions/{sub}`.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -1617,7 +1617,7 @@ public final void deleteSubscription(SubscriptionName subscription) {
    * }
    * }</pre>
    *
-   * @param subscription Required. The subscription to delete. Format is
+   * @param subscription Required. Identifier. The subscription to delete. Format is
    *     `projects/{project}/subscriptions/{sub}`.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -2631,7 +2631,7 @@ public final UnaryCallable<ModifyPushConfigRequest, Empty> modifyPushConfigCalla
    * }
    * }</pre>
    *
-   * @param snapshot Required. The name of the snapshot to get. Format is
+   * @param snapshot Required. Identifier. The name of the snapshot to get. Format is
    *     `projects/{project}/snapshots/{snap}`.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -2664,7 +2664,7 @@ public final Snapshot getSnapshot(SnapshotName snapshot) {
    * }
    * }</pre>
    *
-   * @param snapshot Required. The name of the snapshot to get. Format is
+   * @param snapshot Required. Identifier. The name of the snapshot to get. Format is
    *     `projects/{project}/snapshots/{snap}`.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -2788,8 +2788,8 @@ public final UnaryCallable<GetSnapshotRequest, Snapshot> getSnapshotCallable() {
    * }
    * }</pre>
    *
-   * @param project Required. The name of the project in which to list snapshots. Format is
-   *     `projects/{project-id}`.
+   * @param project Required. Identifier. The name of the project in which to list snapshots. Format
+   *     is `projects/{project-id}`.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
   public final ListSnapshotsPagedResponse listSnapshots(ProjectName project) {
@@ -2823,8 +2823,8 @@ public final ListSnapshotsPagedResponse listSnapshots(ProjectName project) {
    * }
    * }</pre>
    *
-   * @param project Required. The name of the project in which to list snapshots. Format is
-   *     `projects/{project-id}`.
+   * @param project Required. Identifier. The name of the project in which to list snapshots. Format
+   *     is `projects/{project-id}`.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
   public final ListSnapshotsPagedResponse listSnapshots(String project) {
@@ -2975,10 +2975,11 @@ public final UnaryCallable<ListSnapshotsRequest, ListSnapshotsResponse> listSnap
    * }
    * }</pre>
    *
-   * @param name Required. User-provided name for this snapshot. If the name is not provided in the
-   *     request, the server will assign a random name for this snapshot on the same project as the
-   *     subscription. Note that for REST API requests, you must specify a name. See the [resource
-   *     name rules](https://cloud.google.com/pubsub/docs/pubsub-basics#resource_names). Format is
+   * @param name Required. Identifier. User-provided name for this snapshot. If the name is not
+   *     provided in the request, the server will assign a random name for this snapshot on the same
+   *     project as the subscription. Note that for REST API requests, you must specify a name. See
+   *     the [resource name
+   *     rules](https://cloud.google.com/pubsub/docs/pubsub-basics#resource_names). Format is
    *     `projects/{project}/snapshots/{snap}`.
    * @param subscription Required. The subscription whose backlog the snapshot retains.
    *     Specifically, the created snapshot is guaranteed to retain: (a) The existing backlog on the
@@ -3028,10 +3029,11 @@ public final Snapshot createSnapshot(SnapshotName name, SubscriptionName subscri
    * }
    * }</pre>
    *
-   * @param name Required. User-provided name for this snapshot. If the name is not provided in the
-   *     request, the server will assign a random name for this snapshot on the same project as the
-   *     subscription. Note that for REST API requests, you must specify a name. See the [resource
-   *     name rules](https://cloud.google.com/pubsub/docs/pubsub-basics#resource_names). Format is
+   * @param name Required. Identifier. User-provided name for this snapshot. If the name is not
+   *     provided in the request, the server will assign a random name for this snapshot on the same
+   *     project as the subscription. Note that for REST API requests, you must specify a name. See
+   *     the [resource name
+   *     rules](https://cloud.google.com/pubsub/docs/pubsub-basics#resource_names). Format is
    *     `projects/{project}/snapshots/{snap}`.
    * @param subscription Required. The subscription whose backlog the snapshot retains.
    *     Specifically, the created snapshot is guaranteed to retain: (a) The existing backlog on the
@@ -3081,10 +3083,11 @@ public final Snapshot createSnapshot(SnapshotName name, String subscription) {
    * }
    * }</pre>
    *
-   * @param name Required. User-provided name for this snapshot. If the name is not provided in the
-   *     request, the server will assign a random name for this snapshot on the same project as the
-   *     subscription. Note that for REST API requests, you must specify a name. See the [resource
-   *     name rules](https://cloud.google.com/pubsub/docs/pubsub-basics#resource_names). Format is
+   * @param name Required. Identifier. User-provided name for this snapshot. If the name is not
+   *     provided in the request, the server will assign a random name for this snapshot on the same
+   *     project as the subscription. Note that for REST API requests, you must specify a name. See
+   *     the [resource name
+   *     rules](https://cloud.google.com/pubsub/docs/pubsub-basics#resource_names). Format is
    *     `projects/{project}/snapshots/{snap}`.
    * @param subscription Required. The subscription whose backlog the snapshot retains.
    *     Specifically, the created snapshot is guaranteed to retain: (a) The existing backlog on the
@@ -3134,10 +3137,11 @@ public final Snapshot createSnapshot(String name, SubscriptionName subscription)
    * }
    * }</pre>
    *
-   * @param name Required. User-provided name for this snapshot. If the name is not provided in the
-   *     request, the server will assign a random name for this snapshot on the same project as the
-   *     subscription. Note that for REST API requests, you must specify a name. See the [resource
-   *     name rules](https://cloud.google.com/pubsub/docs/pubsub-basics#resource_names). Format is
+   * @param name Required. Identifier. User-provided name for this snapshot. If the name is not
+   *     provided in the request, the server will assign a random name for this snapshot on the same
+   *     project as the subscription. Note that for REST API requests, you must specify a name. See
+   *     the [resource name
+   *     rules](https://cloud.google.com/pubsub/docs/pubsub-basics#resource_names). Format is
    *     `projects/{project}/snapshots/{snap}`.
    * @param subscription Required. The subscription whose backlog the snapshot retains.
    *     Specifically, the created snapshot is guaranteed to retain: (a) The existing backlog on the
@@ -3510,7 +3514,7 @@ public final UnaryCallable<UpdateSnapshotRequest, Snapshot> updateSnapshotCallab
    * }
    * }</pre>
    *
-   * @param snapshot Required. The name of the snapshot to delete. Format is
+   * @param snapshot Required. Identifier. The name of the snapshot to delete. Format is
    *     `projects/{project}/snapshots/{snap}`.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -3546,7 +3550,7 @@ public final void deleteSnapshot(SnapshotName snapshot) {
    * }
    * }</pre>
    *
-   * @param snapshot Required. The name of the snapshot to delete. Format is
+   * @param snapshot Required. Identifier. The name of the snapshot to delete. Format is
    *     `projects/{project}/snapshots/{snap}`.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
diff --git a/google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/v1/TopicAdminClient.java b/google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/v1/TopicAdminClient.java
index 750f4da49..d5433f8ee 100644
--- a/google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/v1/TopicAdminClient.java
+++ b/google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/v1/TopicAdminClient.java
@@ -420,7 +420,7 @@ public PublisherStub getStub() {
    * }
    * }</pre>
    *
-   * @param name Required. The name of the topic. It must have the format
+   * @param name Required. Identifier. The name of the topic. It must have the format
    *     `"projects/{project}/topics/{topic}"`. `{topic}` must start with a letter, and contain only
    *     letters (`[A-Za-z]`), numbers (`[0-9]`), dashes (`-`), underscores (`_`), periods (`.`),
    *     tildes (`~`), plus (`+`) or percent signs (`%`). It must be between 3 and 255 characters in
@@ -451,7 +451,7 @@ public final Topic createTopic(TopicName name) {
    * }
    * }</pre>
    *
-   * @param name Required. The name of the topic. It must have the format
+   * @param name Required. Identifier. The name of the topic. It must have the format
    *     `"projects/{project}/topics/{topic}"`. `{topic}` must start with a letter, and contain only
    *     letters (`[A-Za-z]`), numbers (`[0-9]`), dashes (`-`), underscores (`_`), periods (`.`),
    *     tildes (`~`), plus (`+`) or percent signs (`%`). It must be between 3 and 255 characters in
@@ -682,8 +682,8 @@ public final UnaryCallable<UpdateTopicRequest, Topic> updateTopicCallable() {
    * }
    * }</pre>
    *
-   * @param topic Required. The messages in the request will be published on this topic. Format is
-   *     `projects/{project}/topics/{topic}`.
+   * @param topic Required. Identifier. The messages in the request will be published on this topic.
+   *     Format is `projects/{project}/topics/{topic}`.
    * @param messages Required. The messages to publish.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -715,8 +715,8 @@ public final PublishResponse publish(TopicName topic, List<PubsubMessage> messag
    * }
    * }</pre>
    *
-   * @param topic Required. The messages in the request will be published on this topic. Format is
-   *     `projects/{project}/topics/{topic}`.
+   * @param topic Required. Identifier. The messages in the request will be published on this topic.
+   *     Format is `projects/{project}/topics/{topic}`.
    * @param messages Required. The messages to publish.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -801,7 +801,7 @@ public final UnaryCallable<PublishRequest, PublishResponse> publishCallable() {
    * }
    * }</pre>
    *
-   * @param topic Required. The name of the topic to get. Format is
+   * @param topic Required. Identifier. The name of the topic to get. Format is
    *     `projects/{project}/topics/{topic}`.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -829,7 +829,7 @@ public final Topic getTopic(TopicName topic) {
    * }
    * }</pre>
    *
-   * @param topic Required. The name of the topic to get. Format is
+   * @param topic Required. Identifier. The name of the topic to get. Format is
    *     `projects/{project}/topics/{topic}`.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -938,7 +938,7 @@ public final UnaryCallable<GetTopicRequest, Topic> getTopicCallable() {
    * }
    * }</pre>
    *
-   * @param project Required. The name of the project in which to list topics. Format is
+   * @param project Required. Identifier. The name of the project in which to list topics. Format is
    *     `projects/{project-id}`.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -970,7 +970,7 @@ public final ListTopicsPagedResponse listTopics(ProjectName project) {
    * }
    * }</pre>
    *
-   * @param project Required. The name of the project in which to list topics. Format is
+   * @param project Required. Identifier. The name of the project in which to list topics. Format is
    *     `projects/{project-id}`.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -1481,7 +1481,7 @@ public final ListTopicSnapshotsPagedResponse listTopicSnapshots(
    * }
    * }</pre>
    *
-   * @param topic Required. Name of the topic to delete. Format is
+   * @param topic Required. Identifier. Name of the topic to delete. Format is
    *     `projects/{project}/topics/{topic}`.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -1512,7 +1512,7 @@ public final void deleteTopic(TopicName topic) {
    * }
    * }</pre>
    *
-   * @param topic Required. Name of the topic to delete. Format is
+   * @param topic Required. Identifier. Name of the topic to delete. Format is
    *     `projects/{project}/topics/{topic}`.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/CreateSnapshotRequest.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/CreateSnapshotRequest.java
index e5d4f651c..b8c5201cd 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/CreateSnapshotRequest.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/CreateSnapshotRequest.java
@@ -88,16 +88,16 @@ protected com.google.protobuf.MapFieldReflectionAccessor internalGetMapFieldRefl
    *
    *
    * <pre>
-   * Required. User-provided name for this snapshot. If the name is not provided
-   * in the request, the server will assign a random name for this snapshot on
-   * the same project as the subscription. Note that for REST API requests, you
-   * must specify a name.  See the [resource name
+   * Required. Identifier. User-provided name for this snapshot. If the name is
+   * not provided in the request, the server will assign a random name for this
+   * snapshot on the same project as the subscription. Note that for REST API
+   * requests, you must specify a name.  See the [resource name
    * rules](https://cloud.google.com/pubsub/docs/pubsub-basics#resource_names).
    * Format is `projects/{project}/snapshots/{snap}`.
    * </pre>
    *
    * <code>
-   * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The name.
@@ -119,16 +119,16 @@ public java.lang.String getName() {
    *
    *
    * <pre>
-   * Required. User-provided name for this snapshot. If the name is not provided
-   * in the request, the server will assign a random name for this snapshot on
-   * the same project as the subscription. Note that for REST API requests, you
-   * must specify a name.  See the [resource name
+   * Required. Identifier. User-provided name for this snapshot. If the name is
+   * not provided in the request, the server will assign a random name for this
+   * snapshot on the same project as the subscription. Note that for REST API
+   * requests, you must specify a name.  See the [resource name
    * rules](https://cloud.google.com/pubsub/docs/pubsub-basics#resource_names).
    * Format is `projects/{project}/snapshots/{snap}`.
    * </pre>
    *
    * <code>
-   * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The bytes for name.
@@ -924,16 +924,16 @@ public Builder mergeFrom(
      *
      *
      * <pre>
-     * Required. User-provided name for this snapshot. If the name is not provided
-     * in the request, the server will assign a random name for this snapshot on
-     * the same project as the subscription. Note that for REST API requests, you
-     * must specify a name.  See the [resource name
+     * Required. Identifier. User-provided name for this snapshot. If the name is
+     * not provided in the request, the server will assign a random name for this
+     * snapshot on the same project as the subscription. Note that for REST API
+     * requests, you must specify a name.  See the [resource name
      * rules](https://cloud.google.com/pubsub/docs/pubsub-basics#resource_names).
      * Format is `projects/{project}/snapshots/{snap}`.
      * </pre>
      *
      * <code>
-     * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @return The name.
@@ -954,16 +954,16 @@ public java.lang.String getName() {
      *
      *
      * <pre>
-     * Required. User-provided name for this snapshot. If the name is not provided
-     * in the request, the server will assign a random name for this snapshot on
-     * the same project as the subscription. Note that for REST API requests, you
-     * must specify a name.  See the [resource name
+     * Required. Identifier. User-provided name for this snapshot. If the name is
+     * not provided in the request, the server will assign a random name for this
+     * snapshot on the same project as the subscription. Note that for REST API
+     * requests, you must specify a name.  See the [resource name
      * rules](https://cloud.google.com/pubsub/docs/pubsub-basics#resource_names).
      * Format is `projects/{project}/snapshots/{snap}`.
      * </pre>
      *
      * <code>
-     * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @return The bytes for name.
@@ -984,16 +984,16 @@ public com.google.protobuf.ByteString getNameBytes() {
      *
      *
      * <pre>
-     * Required. User-provided name for this snapshot. If the name is not provided
-     * in the request, the server will assign a random name for this snapshot on
-     * the same project as the subscription. Note that for REST API requests, you
-     * must specify a name.  See the [resource name
+     * Required. Identifier. User-provided name for this snapshot. If the name is
+     * not provided in the request, the server will assign a random name for this
+     * snapshot on the same project as the subscription. Note that for REST API
+     * requests, you must specify a name.  See the [resource name
      * rules](https://cloud.google.com/pubsub/docs/pubsub-basics#resource_names).
      * Format is `projects/{project}/snapshots/{snap}`.
      * </pre>
      *
      * <code>
-     * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @param value The name to set.
@@ -1013,16 +1013,16 @@ public Builder setName(java.lang.String value) {
      *
      *
      * <pre>
-     * Required. User-provided name for this snapshot. If the name is not provided
-     * in the request, the server will assign a random name for this snapshot on
-     * the same project as the subscription. Note that for REST API requests, you
-     * must specify a name.  See the [resource name
+     * Required. Identifier. User-provided name for this snapshot. If the name is
+     * not provided in the request, the server will assign a random name for this
+     * snapshot on the same project as the subscription. Note that for REST API
+     * requests, you must specify a name.  See the [resource name
      * rules](https://cloud.google.com/pubsub/docs/pubsub-basics#resource_names).
      * Format is `projects/{project}/snapshots/{snap}`.
      * </pre>
      *
      * <code>
-     * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @return This builder for chaining.
@@ -1038,16 +1038,16 @@ public Builder clearName() {
      *
      *
      * <pre>
-     * Required. User-provided name for this snapshot. If the name is not provided
-     * in the request, the server will assign a random name for this snapshot on
-     * the same project as the subscription. Note that for REST API requests, you
-     * must specify a name.  See the [resource name
+     * Required. Identifier. User-provided name for this snapshot. If the name is
+     * not provided in the request, the server will assign a random name for this
+     * snapshot on the same project as the subscription. Note that for REST API
+     * requests, you must specify a name.  See the [resource name
      * rules](https://cloud.google.com/pubsub/docs/pubsub-basics#resource_names).
      * Format is `projects/{project}/snapshots/{snap}`.
      * </pre>
      *
      * <code>
-     * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @param value The bytes for name to set.
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/CreateSnapshotRequestOrBuilder.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/CreateSnapshotRequestOrBuilder.java
index 80a1f76fc..0c18c014a 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/CreateSnapshotRequestOrBuilder.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/CreateSnapshotRequestOrBuilder.java
@@ -28,16 +28,16 @@ public interface CreateSnapshotRequestOrBuilder
    *
    *
    * <pre>
-   * Required. User-provided name for this snapshot. If the name is not provided
-   * in the request, the server will assign a random name for this snapshot on
-   * the same project as the subscription. Note that for REST API requests, you
-   * must specify a name.  See the [resource name
+   * Required. Identifier. User-provided name for this snapshot. If the name is
+   * not provided in the request, the server will assign a random name for this
+   * snapshot on the same project as the subscription. Note that for REST API
+   * requests, you must specify a name.  See the [resource name
    * rules](https://cloud.google.com/pubsub/docs/pubsub-basics#resource_names).
    * Format is `projects/{project}/snapshots/{snap}`.
    * </pre>
    *
    * <code>
-   * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The name.
@@ -48,16 +48,16 @@ public interface CreateSnapshotRequestOrBuilder
    *
    *
    * <pre>
-   * Required. User-provided name for this snapshot. If the name is not provided
-   * in the request, the server will assign a random name for this snapshot on
-   * the same project as the subscription. Note that for REST API requests, you
-   * must specify a name.  See the [resource name
+   * Required. Identifier. User-provided name for this snapshot. If the name is
+   * not provided in the request, the server will assign a random name for this
+   * snapshot on the same project as the subscription. Note that for REST API
+   * requests, you must specify a name.  See the [resource name
    * rules](https://cloud.google.com/pubsub/docs/pubsub-basics#resource_names).
    * Format is `projects/{project}/snapshots/{snap}`.
    * </pre>
    *
    * <code>
-   * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The bytes for name.
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/DeleteSnapshotRequest.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/DeleteSnapshotRequest.java
index bc2fc7206..47083fed1 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/DeleteSnapshotRequest.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/DeleteSnapshotRequest.java
@@ -73,12 +73,12 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    *
    *
    * <pre>
-   * Required. The name of the snapshot to delete.
+   * Required. Identifier. The name of the snapshot to delete.
    * Format is `projects/{project}/snapshots/{snap}`.
    * </pre>
    *
    * <code>
-   * string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The snapshot.
@@ -100,12 +100,12 @@ public java.lang.String getSnapshot() {
    *
    *
    * <pre>
-   * Required. The name of the snapshot to delete.
+   * Required. Identifier. The name of the snapshot to delete.
    * Format is `projects/{project}/snapshots/{snap}`.
    * </pre>
    *
    * <code>
-   * string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The bytes for snapshot.
@@ -471,12 +471,12 @@ public Builder mergeFrom(
      *
      *
      * <pre>
-     * Required. The name of the snapshot to delete.
+     * Required. Identifier. The name of the snapshot to delete.
      * Format is `projects/{project}/snapshots/{snap}`.
      * </pre>
      *
      * <code>
-     * string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @return The snapshot.
@@ -497,12 +497,12 @@ public java.lang.String getSnapshot() {
      *
      *
      * <pre>
-     * Required. The name of the snapshot to delete.
+     * Required. Identifier. The name of the snapshot to delete.
      * Format is `projects/{project}/snapshots/{snap}`.
      * </pre>
      *
      * <code>
-     * string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @return The bytes for snapshot.
@@ -523,12 +523,12 @@ public com.google.protobuf.ByteString getSnapshotBytes() {
      *
      *
      * <pre>
-     * Required. The name of the snapshot to delete.
+     * Required. Identifier. The name of the snapshot to delete.
      * Format is `projects/{project}/snapshots/{snap}`.
      * </pre>
      *
      * <code>
-     * string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @param value The snapshot to set.
@@ -548,12 +548,12 @@ public Builder setSnapshot(java.lang.String value) {
      *
      *
      * <pre>
-     * Required. The name of the snapshot to delete.
+     * Required. Identifier. The name of the snapshot to delete.
      * Format is `projects/{project}/snapshots/{snap}`.
      * </pre>
      *
      * <code>
-     * string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @return This builder for chaining.
@@ -569,12 +569,12 @@ public Builder clearSnapshot() {
      *
      *
      * <pre>
-     * Required. The name of the snapshot to delete.
+     * Required. Identifier. The name of the snapshot to delete.
      * Format is `projects/{project}/snapshots/{snap}`.
      * </pre>
      *
      * <code>
-     * string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @param value The bytes for snapshot to set.
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/DeleteSnapshotRequestOrBuilder.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/DeleteSnapshotRequestOrBuilder.java
index 192a33e82..5a4dd6337 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/DeleteSnapshotRequestOrBuilder.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/DeleteSnapshotRequestOrBuilder.java
@@ -28,12 +28,12 @@ public interface DeleteSnapshotRequestOrBuilder
    *
    *
    * <pre>
-   * Required. The name of the snapshot to delete.
+   * Required. Identifier. The name of the snapshot to delete.
    * Format is `projects/{project}/snapshots/{snap}`.
    * </pre>
    *
    * <code>
-   * string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The snapshot.
@@ -44,12 +44,12 @@ public interface DeleteSnapshotRequestOrBuilder
    *
    *
    * <pre>
-   * Required. The name of the snapshot to delete.
+   * Required. Identifier. The name of the snapshot to delete.
    * Format is `projects/{project}/snapshots/{snap}`.
    * </pre>
    *
    * <code>
-   * string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The bytes for snapshot.
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/DeleteSubscriptionRequest.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/DeleteSubscriptionRequest.java
index 80800c659..961fdf8a6 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/DeleteSubscriptionRequest.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/DeleteSubscriptionRequest.java
@@ -73,12 +73,12 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    *
    *
    * <pre>
-   * Required. The subscription to delete.
+   * Required. Identifier. The subscription to delete.
    * Format is `projects/{project}/subscriptions/{sub}`.
    * </pre>
    *
    * <code>
-   * string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The subscription.
@@ -100,12 +100,12 @@ public java.lang.String getSubscription() {
    *
    *
    * <pre>
-   * Required. The subscription to delete.
+   * Required. Identifier. The subscription to delete.
    * Format is `projects/{project}/subscriptions/{sub}`.
    * </pre>
    *
    * <code>
-   * string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The bytes for subscription.
@@ -471,12 +471,12 @@ public Builder mergeFrom(
      *
      *
      * <pre>
-     * Required. The subscription to delete.
+     * Required. Identifier. The subscription to delete.
      * Format is `projects/{project}/subscriptions/{sub}`.
      * </pre>
      *
      * <code>
-     * string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @return The subscription.
@@ -497,12 +497,12 @@ public java.lang.String getSubscription() {
      *
      *
      * <pre>
-     * Required. The subscription to delete.
+     * Required. Identifier. The subscription to delete.
      * Format is `projects/{project}/subscriptions/{sub}`.
      * </pre>
      *
      * <code>
-     * string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @return The bytes for subscription.
@@ -523,12 +523,12 @@ public com.google.protobuf.ByteString getSubscriptionBytes() {
      *
      *
      * <pre>
-     * Required. The subscription to delete.
+     * Required. Identifier. The subscription to delete.
      * Format is `projects/{project}/subscriptions/{sub}`.
      * </pre>
      *
      * <code>
-     * string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @param value The subscription to set.
@@ -548,12 +548,12 @@ public Builder setSubscription(java.lang.String value) {
      *
      *
      * <pre>
-     * Required. The subscription to delete.
+     * Required. Identifier. The subscription to delete.
      * Format is `projects/{project}/subscriptions/{sub}`.
      * </pre>
      *
      * <code>
-     * string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @return This builder for chaining.
@@ -569,12 +569,12 @@ public Builder clearSubscription() {
      *
      *
      * <pre>
-     * Required. The subscription to delete.
+     * Required. Identifier. The subscription to delete.
      * Format is `projects/{project}/subscriptions/{sub}`.
      * </pre>
      *
      * <code>
-     * string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @param value The bytes for subscription to set.
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/DeleteSubscriptionRequestOrBuilder.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/DeleteSubscriptionRequestOrBuilder.java
index 2eb5138ee..5ab0407d2 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/DeleteSubscriptionRequestOrBuilder.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/DeleteSubscriptionRequestOrBuilder.java
@@ -28,12 +28,12 @@ public interface DeleteSubscriptionRequestOrBuilder
    *
    *
    * <pre>
-   * Required. The subscription to delete.
+   * Required. Identifier. The subscription to delete.
    * Format is `projects/{project}/subscriptions/{sub}`.
    * </pre>
    *
    * <code>
-   * string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The subscription.
@@ -44,12 +44,12 @@ public interface DeleteSubscriptionRequestOrBuilder
    *
    *
    * <pre>
-   * Required. The subscription to delete.
+   * Required. Identifier. The subscription to delete.
    * Format is `projects/{project}/subscriptions/{sub}`.
    * </pre>
    *
    * <code>
-   * string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The bytes for subscription.
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/DeleteTopicRequest.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/DeleteTopicRequest.java
index fafde03a2..7171ad93c 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/DeleteTopicRequest.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/DeleteTopicRequest.java
@@ -73,12 +73,12 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    *
    *
    * <pre>
-   * Required. Name of the topic to delete.
+   * Required. Identifier. Name of the topic to delete.
    * Format is `projects/{project}/topics/{topic}`.
    * </pre>
    *
    * <code>
-   * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The topic.
@@ -100,12 +100,12 @@ public java.lang.String getTopic() {
    *
    *
    * <pre>
-   * Required. Name of the topic to delete.
+   * Required. Identifier. Name of the topic to delete.
    * Format is `projects/{project}/topics/{topic}`.
    * </pre>
    *
    * <code>
-   * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The bytes for topic.
@@ -470,12 +470,12 @@ public Builder mergeFrom(
      *
      *
      * <pre>
-     * Required. Name of the topic to delete.
+     * Required. Identifier. Name of the topic to delete.
      * Format is `projects/{project}/topics/{topic}`.
      * </pre>
      *
      * <code>
-     * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @return The topic.
@@ -496,12 +496,12 @@ public java.lang.String getTopic() {
      *
      *
      * <pre>
-     * Required. Name of the topic to delete.
+     * Required. Identifier. Name of the topic to delete.
      * Format is `projects/{project}/topics/{topic}`.
      * </pre>
      *
      * <code>
-     * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @return The bytes for topic.
@@ -522,12 +522,12 @@ public com.google.protobuf.ByteString getTopicBytes() {
      *
      *
      * <pre>
-     * Required. Name of the topic to delete.
+     * Required. Identifier. Name of the topic to delete.
      * Format is `projects/{project}/topics/{topic}`.
      * </pre>
      *
      * <code>
-     * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @param value The topic to set.
@@ -547,12 +547,12 @@ public Builder setTopic(java.lang.String value) {
      *
      *
      * <pre>
-     * Required. Name of the topic to delete.
+     * Required. Identifier. Name of the topic to delete.
      * Format is `projects/{project}/topics/{topic}`.
      * </pre>
      *
      * <code>
-     * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @return This builder for chaining.
@@ -568,12 +568,12 @@ public Builder clearTopic() {
      *
      *
      * <pre>
-     * Required. Name of the topic to delete.
+     * Required. Identifier. Name of the topic to delete.
      * Format is `projects/{project}/topics/{topic}`.
      * </pre>
      *
      * <code>
-     * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @param value The bytes for topic to set.
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/DeleteTopicRequestOrBuilder.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/DeleteTopicRequestOrBuilder.java
index 065d4a790..a13a646fd 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/DeleteTopicRequestOrBuilder.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/DeleteTopicRequestOrBuilder.java
@@ -28,12 +28,12 @@ public interface DeleteTopicRequestOrBuilder
    *
    *
    * <pre>
-   * Required. Name of the topic to delete.
+   * Required. Identifier. Name of the topic to delete.
    * Format is `projects/{project}/topics/{topic}`.
    * </pre>
    *
    * <code>
-   * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The topic.
@@ -44,12 +44,12 @@ public interface DeleteTopicRequestOrBuilder
    *
    *
    * <pre>
-   * Required. Name of the topic to delete.
+   * Required. Identifier. Name of the topic to delete.
    * Format is `projects/{project}/topics/{topic}`.
    * </pre>
    *
    * <code>
-   * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The bytes for topic.
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/GetSnapshotRequest.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/GetSnapshotRequest.java
index 401c8cd4c..716559f8b 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/GetSnapshotRequest.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/GetSnapshotRequest.java
@@ -73,12 +73,12 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    *
    *
    * <pre>
-   * Required. The name of the snapshot to get.
+   * Required. Identifier. The name of the snapshot to get.
    * Format is `projects/{project}/snapshots/{snap}`.
    * </pre>
    *
    * <code>
-   * string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The snapshot.
@@ -100,12 +100,12 @@ public java.lang.String getSnapshot() {
    *
    *
    * <pre>
-   * Required. The name of the snapshot to get.
+   * Required. Identifier. The name of the snapshot to get.
    * Format is `projects/{project}/snapshots/{snap}`.
    * </pre>
    *
    * <code>
-   * string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The bytes for snapshot.
@@ -470,12 +470,12 @@ public Builder mergeFrom(
      *
      *
      * <pre>
-     * Required. The name of the snapshot to get.
+     * Required. Identifier. The name of the snapshot to get.
      * Format is `projects/{project}/snapshots/{snap}`.
      * </pre>
      *
      * <code>
-     * string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @return The snapshot.
@@ -496,12 +496,12 @@ public java.lang.String getSnapshot() {
      *
      *
      * <pre>
-     * Required. The name of the snapshot to get.
+     * Required. Identifier. The name of the snapshot to get.
      * Format is `projects/{project}/snapshots/{snap}`.
      * </pre>
      *
      * <code>
-     * string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @return The bytes for snapshot.
@@ -522,12 +522,12 @@ public com.google.protobuf.ByteString getSnapshotBytes() {
      *
      *
      * <pre>
-     * Required. The name of the snapshot to get.
+     * Required. Identifier. The name of the snapshot to get.
      * Format is `projects/{project}/snapshots/{snap}`.
      * </pre>
      *
      * <code>
-     * string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @param value The snapshot to set.
@@ -547,12 +547,12 @@ public Builder setSnapshot(java.lang.String value) {
      *
      *
      * <pre>
-     * Required. The name of the snapshot to get.
+     * Required. Identifier. The name of the snapshot to get.
      * Format is `projects/{project}/snapshots/{snap}`.
      * </pre>
      *
      * <code>
-     * string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @return This builder for chaining.
@@ -568,12 +568,12 @@ public Builder clearSnapshot() {
      *
      *
      * <pre>
-     * Required. The name of the snapshot to get.
+     * Required. Identifier. The name of the snapshot to get.
      * Format is `projects/{project}/snapshots/{snap}`.
      * </pre>
      *
      * <code>
-     * string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @param value The bytes for snapshot to set.
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/GetSnapshotRequestOrBuilder.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/GetSnapshotRequestOrBuilder.java
index a4728d85a..343c6867c 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/GetSnapshotRequestOrBuilder.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/GetSnapshotRequestOrBuilder.java
@@ -28,12 +28,12 @@ public interface GetSnapshotRequestOrBuilder
    *
    *
    * <pre>
-   * Required. The name of the snapshot to get.
+   * Required. Identifier. The name of the snapshot to get.
    * Format is `projects/{project}/snapshots/{snap}`.
    * </pre>
    *
    * <code>
-   * string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The snapshot.
@@ -44,12 +44,12 @@ public interface GetSnapshotRequestOrBuilder
    *
    *
    * <pre>
-   * Required. The name of the snapshot to get.
+   * Required. Identifier. The name of the snapshot to get.
    * Format is `projects/{project}/snapshots/{snap}`.
    * </pre>
    *
    * <code>
-   * string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string snapshot = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The bytes for snapshot.
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/GetSubscriptionRequest.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/GetSubscriptionRequest.java
index 0553b1f91..7b7e00da8 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/GetSubscriptionRequest.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/GetSubscriptionRequest.java
@@ -73,12 +73,12 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    *
    *
    * <pre>
-   * Required. The name of the subscription to get.
+   * Required. Identifier. The name of the subscription to get.
    * Format is `projects/{project}/subscriptions/{sub}`.
    * </pre>
    *
    * <code>
-   * string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The subscription.
@@ -100,12 +100,12 @@ public java.lang.String getSubscription() {
    *
    *
    * <pre>
-   * Required. The name of the subscription to get.
+   * Required. Identifier. The name of the subscription to get.
    * Format is `projects/{project}/subscriptions/{sub}`.
    * </pre>
    *
    * <code>
-   * string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The bytes for subscription.
@@ -471,12 +471,12 @@ public Builder mergeFrom(
      *
      *
      * <pre>
-     * Required. The name of the subscription to get.
+     * Required. Identifier. The name of the subscription to get.
      * Format is `projects/{project}/subscriptions/{sub}`.
      * </pre>
      *
      * <code>
-     * string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @return The subscription.
@@ -497,12 +497,12 @@ public java.lang.String getSubscription() {
      *
      *
      * <pre>
-     * Required. The name of the subscription to get.
+     * Required. Identifier. The name of the subscription to get.
      * Format is `projects/{project}/subscriptions/{sub}`.
      * </pre>
      *
      * <code>
-     * string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @return The bytes for subscription.
@@ -523,12 +523,12 @@ public com.google.protobuf.ByteString getSubscriptionBytes() {
      *
      *
      * <pre>
-     * Required. The name of the subscription to get.
+     * Required. Identifier. The name of the subscription to get.
      * Format is `projects/{project}/subscriptions/{sub}`.
      * </pre>
      *
      * <code>
-     * string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @param value The subscription to set.
@@ -548,12 +548,12 @@ public Builder setSubscription(java.lang.String value) {
      *
      *
      * <pre>
-     * Required. The name of the subscription to get.
+     * Required. Identifier. The name of the subscription to get.
      * Format is `projects/{project}/subscriptions/{sub}`.
      * </pre>
      *
      * <code>
-     * string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @return This builder for chaining.
@@ -569,12 +569,12 @@ public Builder clearSubscription() {
      *
      *
      * <pre>
-     * Required. The name of the subscription to get.
+     * Required. Identifier. The name of the subscription to get.
      * Format is `projects/{project}/subscriptions/{sub}`.
      * </pre>
      *
      * <code>
-     * string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @param value The bytes for subscription to set.
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/GetSubscriptionRequestOrBuilder.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/GetSubscriptionRequestOrBuilder.java
index c51df2737..4513defa8 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/GetSubscriptionRequestOrBuilder.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/GetSubscriptionRequestOrBuilder.java
@@ -28,12 +28,12 @@ public interface GetSubscriptionRequestOrBuilder
    *
    *
    * <pre>
-   * Required. The name of the subscription to get.
+   * Required. Identifier. The name of the subscription to get.
    * Format is `projects/{project}/subscriptions/{sub}`.
    * </pre>
    *
    * <code>
-   * string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The subscription.
@@ -44,12 +44,12 @@ public interface GetSubscriptionRequestOrBuilder
    *
    *
    * <pre>
-   * Required. The name of the subscription to get.
+   * Required. Identifier. The name of the subscription to get.
    * Format is `projects/{project}/subscriptions/{sub}`.
    * </pre>
    *
    * <code>
-   * string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string subscription = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The bytes for subscription.
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/GetTopicRequest.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/GetTopicRequest.java
index e8e01add6..7d1490c14 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/GetTopicRequest.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/GetTopicRequest.java
@@ -73,12 +73,12 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    *
    *
    * <pre>
-   * Required. The name of the topic to get.
+   * Required. Identifier. The name of the topic to get.
    * Format is `projects/{project}/topics/{topic}`.
    * </pre>
    *
    * <code>
-   * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The topic.
@@ -100,12 +100,12 @@ public java.lang.String getTopic() {
    *
    *
    * <pre>
-   * Required. The name of the topic to get.
+   * Required. Identifier. The name of the topic to get.
    * Format is `projects/{project}/topics/{topic}`.
    * </pre>
    *
    * <code>
-   * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The bytes for topic.
@@ -468,12 +468,12 @@ public Builder mergeFrom(
      *
      *
      * <pre>
-     * Required. The name of the topic to get.
+     * Required. Identifier. The name of the topic to get.
      * Format is `projects/{project}/topics/{topic}`.
      * </pre>
      *
      * <code>
-     * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @return The topic.
@@ -494,12 +494,12 @@ public java.lang.String getTopic() {
      *
      *
      * <pre>
-     * Required. The name of the topic to get.
+     * Required. Identifier. The name of the topic to get.
      * Format is `projects/{project}/topics/{topic}`.
      * </pre>
      *
      * <code>
-     * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @return The bytes for topic.
@@ -520,12 +520,12 @@ public com.google.protobuf.ByteString getTopicBytes() {
      *
      *
      * <pre>
-     * Required. The name of the topic to get.
+     * Required. Identifier. The name of the topic to get.
      * Format is `projects/{project}/topics/{topic}`.
      * </pre>
      *
      * <code>
-     * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @param value The topic to set.
@@ -545,12 +545,12 @@ public Builder setTopic(java.lang.String value) {
      *
      *
      * <pre>
-     * Required. The name of the topic to get.
+     * Required. Identifier. The name of the topic to get.
      * Format is `projects/{project}/topics/{topic}`.
      * </pre>
      *
      * <code>
-     * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @return This builder for chaining.
@@ -566,12 +566,12 @@ public Builder clearTopic() {
      *
      *
      * <pre>
-     * Required. The name of the topic to get.
+     * Required. Identifier. The name of the topic to get.
      * Format is `projects/{project}/topics/{topic}`.
      * </pre>
      *
      * <code>
-     * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @param value The bytes for topic to set.
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/GetTopicRequestOrBuilder.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/GetTopicRequestOrBuilder.java
index e22bc60e3..5b6281637 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/GetTopicRequestOrBuilder.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/GetTopicRequestOrBuilder.java
@@ -28,12 +28,12 @@ public interface GetTopicRequestOrBuilder
    *
    *
    * <pre>
-   * Required. The name of the topic to get.
+   * Required. Identifier. The name of the topic to get.
    * Format is `projects/{project}/topics/{topic}`.
    * </pre>
    *
    * <code>
-   * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The topic.
@@ -44,12 +44,12 @@ public interface GetTopicRequestOrBuilder
    *
    *
    * <pre>
-   * Required. The name of the topic to get.
+   * Required. Identifier. The name of the topic to get.
    * Format is `projects/{project}/topics/{topic}`.
    * </pre>
    *
    * <code>
-   * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The bytes for topic.
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/ListSnapshotsRequest.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/ListSnapshotsRequest.java
index 73672588e..869e380db 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/ListSnapshotsRequest.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/ListSnapshotsRequest.java
@@ -74,12 +74,12 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    *
    *
    * <pre>
-   * Required. The name of the project in which to list snapshots.
+   * Required. Identifier. The name of the project in which to list snapshots.
    * Format is `projects/{project-id}`.
    * </pre>
    *
    * <code>
-   * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The project.
@@ -101,12 +101,12 @@ public java.lang.String getProject() {
    *
    *
    * <pre>
-   * Required. The name of the project in which to list snapshots.
+   * Required. Identifier. The name of the project in which to list snapshots.
    * Format is `projects/{project-id}`.
    * </pre>
    *
    * <code>
-   * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The bytes for project.
@@ -594,12 +594,12 @@ public Builder mergeFrom(
      *
      *
      * <pre>
-     * Required. The name of the project in which to list snapshots.
+     * Required. Identifier. The name of the project in which to list snapshots.
      * Format is `projects/{project-id}`.
      * </pre>
      *
      * <code>
-     * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @return The project.
@@ -620,12 +620,12 @@ public java.lang.String getProject() {
      *
      *
      * <pre>
-     * Required. The name of the project in which to list snapshots.
+     * Required. Identifier. The name of the project in which to list snapshots.
      * Format is `projects/{project-id}`.
      * </pre>
      *
      * <code>
-     * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @return The bytes for project.
@@ -646,12 +646,12 @@ public com.google.protobuf.ByteString getProjectBytes() {
      *
      *
      * <pre>
-     * Required. The name of the project in which to list snapshots.
+     * Required. Identifier. The name of the project in which to list snapshots.
      * Format is `projects/{project-id}`.
      * </pre>
      *
      * <code>
-     * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @param value The project to set.
@@ -671,12 +671,12 @@ public Builder setProject(java.lang.String value) {
      *
      *
      * <pre>
-     * Required. The name of the project in which to list snapshots.
+     * Required. Identifier. The name of the project in which to list snapshots.
      * Format is `projects/{project-id}`.
      * </pre>
      *
      * <code>
-     * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @return This builder for chaining.
@@ -692,12 +692,12 @@ public Builder clearProject() {
      *
      *
      * <pre>
-     * Required. The name of the project in which to list snapshots.
+     * Required. Identifier. The name of the project in which to list snapshots.
      * Format is `projects/{project-id}`.
      * </pre>
      *
      * <code>
-     * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @param value The bytes for project to set.
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/ListSnapshotsRequestOrBuilder.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/ListSnapshotsRequestOrBuilder.java
index 8fff6c2e5..ee2ba020c 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/ListSnapshotsRequestOrBuilder.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/ListSnapshotsRequestOrBuilder.java
@@ -28,12 +28,12 @@ public interface ListSnapshotsRequestOrBuilder
    *
    *
    * <pre>
-   * Required. The name of the project in which to list snapshots.
+   * Required. Identifier. The name of the project in which to list snapshots.
    * Format is `projects/{project-id}`.
    * </pre>
    *
    * <code>
-   * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The project.
@@ -44,12 +44,12 @@ public interface ListSnapshotsRequestOrBuilder
    *
    *
    * <pre>
-   * Required. The name of the project in which to list snapshots.
+   * Required. Identifier. The name of the project in which to list snapshots.
    * Format is `projects/{project-id}`.
    * </pre>
    *
    * <code>
-   * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The bytes for project.
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/ListSubscriptionsRequest.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/ListSubscriptionsRequest.java
index 24fe6dae9..2a3705cd7 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/ListSubscriptionsRequest.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/ListSubscriptionsRequest.java
@@ -74,12 +74,12 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    *
    *
    * <pre>
-   * Required. The name of the project in which to list subscriptions.
-   * Format is `projects/{project-id}`.
+   * Required. Identifier. The name of the project in which to list
+   * subscriptions. Format is `projects/{project-id}`.
    * </pre>
    *
    * <code>
-   * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The project.
@@ -101,12 +101,12 @@ public java.lang.String getProject() {
    *
    *
    * <pre>
-   * Required. The name of the project in which to list subscriptions.
-   * Format is `projects/{project-id}`.
+   * Required. Identifier. The name of the project in which to list
+   * subscriptions. Format is `projects/{project-id}`.
    * </pre>
    *
    * <code>
-   * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The bytes for project.
@@ -594,12 +594,12 @@ public Builder mergeFrom(
      *
      *
      * <pre>
-     * Required. The name of the project in which to list subscriptions.
-     * Format is `projects/{project-id}`.
+     * Required. Identifier. The name of the project in which to list
+     * subscriptions. Format is `projects/{project-id}`.
      * </pre>
      *
      * <code>
-     * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @return The project.
@@ -620,12 +620,12 @@ public java.lang.String getProject() {
      *
      *
      * <pre>
-     * Required. The name of the project in which to list subscriptions.
-     * Format is `projects/{project-id}`.
+     * Required. Identifier. The name of the project in which to list
+     * subscriptions. Format is `projects/{project-id}`.
      * </pre>
      *
      * <code>
-     * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @return The bytes for project.
@@ -646,12 +646,12 @@ public com.google.protobuf.ByteString getProjectBytes() {
      *
      *
      * <pre>
-     * Required. The name of the project in which to list subscriptions.
-     * Format is `projects/{project-id}`.
+     * Required. Identifier. The name of the project in which to list
+     * subscriptions. Format is `projects/{project-id}`.
      * </pre>
      *
      * <code>
-     * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @param value The project to set.
@@ -671,12 +671,12 @@ public Builder setProject(java.lang.String value) {
      *
      *
      * <pre>
-     * Required. The name of the project in which to list subscriptions.
-     * Format is `projects/{project-id}`.
+     * Required. Identifier. The name of the project in which to list
+     * subscriptions. Format is `projects/{project-id}`.
      * </pre>
      *
      * <code>
-     * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @return This builder for chaining.
@@ -692,12 +692,12 @@ public Builder clearProject() {
      *
      *
      * <pre>
-     * Required. The name of the project in which to list subscriptions.
-     * Format is `projects/{project-id}`.
+     * Required. Identifier. The name of the project in which to list
+     * subscriptions. Format is `projects/{project-id}`.
      * </pre>
      *
      * <code>
-     * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @param value The bytes for project to set.
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/ListSubscriptionsRequestOrBuilder.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/ListSubscriptionsRequestOrBuilder.java
index fedfd324d..d07523d10 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/ListSubscriptionsRequestOrBuilder.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/ListSubscriptionsRequestOrBuilder.java
@@ -28,12 +28,12 @@ public interface ListSubscriptionsRequestOrBuilder
    *
    *
    * <pre>
-   * Required. The name of the project in which to list subscriptions.
-   * Format is `projects/{project-id}`.
+   * Required. Identifier. The name of the project in which to list
+   * subscriptions. Format is `projects/{project-id}`.
    * </pre>
    *
    * <code>
-   * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The project.
@@ -44,12 +44,12 @@ public interface ListSubscriptionsRequestOrBuilder
    *
    *
    * <pre>
-   * Required. The name of the project in which to list subscriptions.
-   * Format is `projects/{project-id}`.
+   * Required. Identifier. The name of the project in which to list
+   * subscriptions. Format is `projects/{project-id}`.
    * </pre>
    *
    * <code>
-   * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The bytes for project.
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/ListTopicsRequest.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/ListTopicsRequest.java
index 99b028c30..873b3f152 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/ListTopicsRequest.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/ListTopicsRequest.java
@@ -74,12 +74,12 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    *
    *
    * <pre>
-   * Required. The name of the project in which to list topics.
+   * Required. Identifier. The name of the project in which to list topics.
    * Format is `projects/{project-id}`.
    * </pre>
    *
    * <code>
-   * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The project.
@@ -101,12 +101,12 @@ public java.lang.String getProject() {
    *
    *
    * <pre>
-   * Required. The name of the project in which to list topics.
+   * Required. Identifier. The name of the project in which to list topics.
    * Format is `projects/{project-id}`.
    * </pre>
    *
    * <code>
-   * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The bytes for project.
@@ -593,12 +593,12 @@ public Builder mergeFrom(
      *
      *
      * <pre>
-     * Required. The name of the project in which to list topics.
+     * Required. Identifier. The name of the project in which to list topics.
      * Format is `projects/{project-id}`.
      * </pre>
      *
      * <code>
-     * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @return The project.
@@ -619,12 +619,12 @@ public java.lang.String getProject() {
      *
      *
      * <pre>
-     * Required. The name of the project in which to list topics.
+     * Required. Identifier. The name of the project in which to list topics.
      * Format is `projects/{project-id}`.
      * </pre>
      *
      * <code>
-     * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @return The bytes for project.
@@ -645,12 +645,12 @@ public com.google.protobuf.ByteString getProjectBytes() {
      *
      *
      * <pre>
-     * Required. The name of the project in which to list topics.
+     * Required. Identifier. The name of the project in which to list topics.
      * Format is `projects/{project-id}`.
      * </pre>
      *
      * <code>
-     * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @param value The project to set.
@@ -670,12 +670,12 @@ public Builder setProject(java.lang.String value) {
      *
      *
      * <pre>
-     * Required. The name of the project in which to list topics.
+     * Required. Identifier. The name of the project in which to list topics.
      * Format is `projects/{project-id}`.
      * </pre>
      *
      * <code>
-     * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @return This builder for chaining.
@@ -691,12 +691,12 @@ public Builder clearProject() {
      *
      *
      * <pre>
-     * Required. The name of the project in which to list topics.
+     * Required. Identifier. The name of the project in which to list topics.
      * Format is `projects/{project-id}`.
      * </pre>
      *
      * <code>
-     * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @param value The bytes for project to set.
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/ListTopicsRequestOrBuilder.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/ListTopicsRequestOrBuilder.java
index b39fe3f12..8b134adc0 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/ListTopicsRequestOrBuilder.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/ListTopicsRequestOrBuilder.java
@@ -28,12 +28,12 @@ public interface ListTopicsRequestOrBuilder
    *
    *
    * <pre>
-   * Required. The name of the project in which to list topics.
+   * Required. Identifier. The name of the project in which to list topics.
    * Format is `projects/{project-id}`.
    * </pre>
    *
    * <code>
-   * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The project.
@@ -44,12 +44,12 @@ public interface ListTopicsRequestOrBuilder
    *
    *
    * <pre>
-   * Required. The name of the project in which to list topics.
+   * Required. Identifier. The name of the project in which to list topics.
    * Format is `projects/{project-id}`.
    * </pre>
    *
    * <code>
-   * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string project = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The bytes for project.
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/PublishRequest.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/PublishRequest.java
index 9187ab532..6f9f3ecf5 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/PublishRequest.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/PublishRequest.java
@@ -74,12 +74,12 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    *
    *
    * <pre>
-   * Required. The messages in the request will be published on this topic.
-   * Format is `projects/{project}/topics/{topic}`.
+   * Required. Identifier. The messages in the request will be published on this
+   * topic. Format is `projects/{project}/topics/{topic}`.
    * </pre>
    *
    * <code>
-   * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The topic.
@@ -101,12 +101,12 @@ public java.lang.String getTopic() {
    *
    *
    * <pre>
-   * Required. The messages in the request will be published on this topic.
-   * Format is `projects/{project}/topics/{topic}`.
+   * Required. Identifier. The messages in the request will be published on this
+   * topic. Format is `projects/{project}/topics/{topic}`.
    * </pre>
    *
    * <code>
-   * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The bytes for topic.
@@ -626,12 +626,12 @@ public Builder mergeFrom(
      *
      *
      * <pre>
-     * Required. The messages in the request will be published on this topic.
-     * Format is `projects/{project}/topics/{topic}`.
+     * Required. Identifier. The messages in the request will be published on this
+     * topic. Format is `projects/{project}/topics/{topic}`.
      * </pre>
      *
      * <code>
-     * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @return The topic.
@@ -652,12 +652,12 @@ public java.lang.String getTopic() {
      *
      *
      * <pre>
-     * Required. The messages in the request will be published on this topic.
-     * Format is `projects/{project}/topics/{topic}`.
+     * Required. Identifier. The messages in the request will be published on this
+     * topic. Format is `projects/{project}/topics/{topic}`.
      * </pre>
      *
      * <code>
-     * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @return The bytes for topic.
@@ -678,12 +678,12 @@ public com.google.protobuf.ByteString getTopicBytes() {
      *
      *
      * <pre>
-     * Required. The messages in the request will be published on this topic.
-     * Format is `projects/{project}/topics/{topic}`.
+     * Required. Identifier. The messages in the request will be published on this
+     * topic. Format is `projects/{project}/topics/{topic}`.
      * </pre>
      *
      * <code>
-     * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @param value The topic to set.
@@ -703,12 +703,12 @@ public Builder setTopic(java.lang.String value) {
      *
      *
      * <pre>
-     * Required. The messages in the request will be published on this topic.
-     * Format is `projects/{project}/topics/{topic}`.
+     * Required. Identifier. The messages in the request will be published on this
+     * topic. Format is `projects/{project}/topics/{topic}`.
      * </pre>
      *
      * <code>
-     * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @return This builder for chaining.
@@ -724,12 +724,12 @@ public Builder clearTopic() {
      *
      *
      * <pre>
-     * Required. The messages in the request will be published on this topic.
-     * Format is `projects/{project}/topics/{topic}`.
+     * Required. Identifier. The messages in the request will be published on this
+     * topic. Format is `projects/{project}/topics/{topic}`.
      * </pre>
      *
      * <code>
-     * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+     * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
      * </code>
      *
      * @param value The bytes for topic to set.
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/PublishRequestOrBuilder.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/PublishRequestOrBuilder.java
index 1718c594e..c3d8e7a17 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/PublishRequestOrBuilder.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/PublishRequestOrBuilder.java
@@ -28,12 +28,12 @@ public interface PublishRequestOrBuilder
    *
    *
    * <pre>
-   * Required. The messages in the request will be published on this topic.
-   * Format is `projects/{project}/topics/{topic}`.
+   * Required. Identifier. The messages in the request will be published on this
+   * topic. Format is `projects/{project}/topics/{topic}`.
    * </pre>
    *
    * <code>
-   * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The topic.
@@ -44,12 +44,12 @@ public interface PublishRequestOrBuilder
    *
    *
    * <pre>
-   * Required. The messages in the request will be published on this topic.
-   * Format is `projects/{project}/topics/{topic}`.
+   * Required. Identifier. The messages in the request will be published on this
+   * topic. Format is `projects/{project}/topics/{topic}`.
    * </pre>
    *
    * <code>
-   * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = { ... }
+   * string topic = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER, (.google.api.resource_reference) = { ... }
    * </code>
    *
    * @return The bytes for topic.
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/PubsubProto.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/PubsubProto.java
index 1b5e7d634..fae7dfbc3 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/PubsubProto.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/PubsubProto.java
@@ -601,12 +601,12 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
           + " \001(\0132\037.google.pubsub.v1.JavaScriptUDFB\003\340A\001H\000\022\026\n"
           + "\007enabled\030\003 \001(\010B\005\030\001\340A\001\022\025\n"
           + "\010disabled\030\004 \001(\010B\003\340A\001B\013\n"
-          + "\ttransform\"\235\007\n"
-          + "\005Topic\022\021\n"
-          + "\004name\030\001 \001(\tB\003\340A\002\0228\n"
+          + "\ttransform\"\240\007\n"
+          + "\005Topic\022\024\n"
+          + "\004name\030\001 \001(\tB\006\340A\002\340A\010\0228\n"
           + "\006labels\030\002 \003(\0132#.google.pubsub.v1.Topic.LabelsEntryB\003\340A\001\022K\n"
-          + "\026message_storage_policy\030\003 \001(\0132&.goo"
-          + "gle.pubsub.v1.MessageStoragePolicyB\003\340A\001\022?\n"
+          + "\026message_storage_policy\030\003 \001(\0132&."
+          + "google.pubsub.v1.MessageStoragePolicyB\003\340A\001\022?\n"
           + "\014kms_key_name\030\005 \001(\tB)\340A\001\372A#\n"
           + "!cloudkms.googleapis.com/CryptoKey\022>\n"
           + "\017schema_settings\030\006 \001(\0132"
@@ -631,32 +631,33 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
           + "\021STATE_UNSPECIFIED\020\000\022\n\n"
           + "\006ACTIVE\020\001\022\034\n"
           + "\030INGESTION_RESOURCE_ERROR\020\002:c\352A`\n"
-          + "\033pubsub.googleapis.com/Topic\022!projects/{project}/top"
-          + "ics/{topic}\022\017_deleted-topic_*\006topics2\005topic\"\200\002\n\r"
+          + "\033pubsub.googleapis.com/Topic\022!projects/{project}/"
+          + "topics/{topic}\022\017_deleted-topic_*\006topics2\005topic\"\200\002\n\r"
           + "PubsubMessage\022\021\n"
           + "\004data\030\001 \001(\014B\003\340A\001\022H\n\n"
           + "attributes\030\002"
-          + " \003(\0132/.google.pubsub.v1.PubsubMessage.AttributesEntryB\003\340A\001\022\022\n\n"
+          + " \003(\0132/.google.pubsub.v1.PubsubMessage.AttributesEntryB\003\340A\001\022\022\n"
+          + "\n"
           + "message_id\030\003 \001(\t\0220\n"
           + "\014publish_time\030\004 \001(\0132\032.google.protobuf.Timestamp\022\031\n"
           + "\014ordering_key\030\005 \001(\tB\003\340A\001\0321\n"
           + "\017AttributesEntry\022\013\n"
           + "\003key\030\001 \001(\t\022\r\n"
-          + "\005value\030\002 \001(\t:\0028\001\"E\n"
-          + "\017GetTopicRequest\0222\n"
-          + "\005topic\030\001 \001(\tB#\340A\002\372A\035\n"
+          + "\005value\030\002 \001(\t:\0028\001\"H\n"
+          + "\017GetTopicRequest\0225\n"
+          + "\005topic\030\001 \001(\tB&\340A\002\340A\010\372A\035\n"
           + "\033pubsub.googleapis.com/Topic\"w\n"
           + "\022UpdateTopicRequest\022+\n"
           + "\005topic\030\001 \001(\0132\027.google.pubsub.v1.TopicB\003\340A\002\0224\n"
-          + "\013update_mask\030\002 \001(\0132\032.google.protobuf.FieldMaskB\003\340A\002\"|\n"
-          + "\016PublishRequest\0222\n"
-          + "\005topic\030\001 \001(\tB#\340A\002\372A\035\n"
+          + "\013update_mask\030\002 \001(\0132\032.google.protobuf.FieldMaskB\003\340A\002\"\177\n"
+          + "\016PublishRequest\0225\n"
+          + "\005topic\030\001 \001(\tB&\340A\002\340A\010\372A\035\n"
           + "\033pubsub.googleapis.com/Topic\0226\n"
           + "\010messages\030\002 \003(\0132\037.google.pubsub.v1.PubsubMessageB\003\340A\002\"+\n"
           + "\017PublishResponse\022\030\n"
-          + "\013message_ids\030\001 \003(\tB\003\340A\001\"\212\001\n"
-          + "\021ListTopicsRequest\022D\n"
-          + "\007project\030\001 \001(\tB3\340A\002\372A-\n"
+          + "\013message_ids\030\001 \003(\tB\003\340A\001\"\215\001\n"
+          + "\021ListTopicsRequest\022G\n"
+          + "\007project\030\001 \001(\tB6\340A\002\340A\010\372A-\n"
           + "+cloudresourcemanager.googleapis.com/Project\022\026\n"
           + "\tpage_size\030\002 \001(\005B\003\340A\001\022\027\n\n"
           + "page_token\030\003 \001(\tB\003\340A\001\"`\n"
@@ -675,36 +676,35 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
           + "\031ListTopicSnapshotsRequest\0222\n"
           + "\005topic\030\001 \001(\tB#\340A\002\372A\035\n"
           + "\033pubsub.googleapis.com/Topic\022\026\n"
-          + "\tpage_size\030\002 \001(\005B\003\340A\001\022\027\n"
-          + "\n"
+          + "\tpage_size\030\002 \001(\005B\003\340A\001\022\027\n\n"
           + "page_token\030\003 \001(\tB\003\340A\001\"u\n"
           + "\032ListTopicSnapshotsResponse\0229\n"
           + "\tsnapshots\030\001 \003(\tB&\340A\001\372A \n"
           + "\036pubsub.googleapis.com/Snapshot\022\034\n"
-          + "\017next_page_token\030\002 \001(\tB\003\340A\001\"H\n"
-          + "\022DeleteTopicRequest\0222\n"
-          + "\005topic\030\001 \001(\tB#\340A\002\372A\035\n"
+          + "\017next_page_token\030\002 \001(\tB\003\340A\001\"K\n"
+          + "\022DeleteTopicRequest\0225\n"
+          + "\005topic\030\001 \001(\tB&\340A\002\340A\010\372A\035\n"
           + "\033pubsub.googleapis.com/Topic\"]\n"
           + "\031DetachSubscriptionRequest\022@\n"
           + "\014subscription\030\001 \001(\tB*\340A\002\372A$\n"
           + "\"pubsub.googleapis.com/Subscription\"\034\n"
-          + "\032DetachSubscriptionResponse\"\245\014\n"
-          + "\014Subscription\022\021\n"
-          + "\004name\030\001 \001(\tB\003\340A\002\0222\n"
+          + "\032DetachSubscriptionResponse\"\250\014\n"
+          + "\014Subscription\022\024\n"
+          + "\004name\030\001 \001(\tB\006\340A\002\340A\010\0222\n"
           + "\005topic\030\002 \001(\tB#\340A\002\372A\035\n"
           + "\033pubsub.googleapis.com/Topic\0226\n"
           + "\013push_config\030\004"
           + " \001(\0132\034.google.pubsub.v1.PushConfigB\003\340A\001\022>\n"
           + "\017bigquery_config\030\022 \001(\0132"
           + " .google.pubsub.v1.BigQueryConfigB\003\340A\001\022G\n"
-          + "\024cloud_storage_config\030\026"
-          + " \001(\0132$.google.pubsub.v1.CloudStorageConfigB\003\340A\001\022!\n"
+          + "\024cloud_storage_config\030\026 \001(\0132$.g"
+          + "oogle.pubsub.v1.CloudStorageConfigB\003\340A\001\022!\n"
           + "\024ack_deadline_seconds\030\005 \001(\005B\003\340A\001\022\"\n"
           + "\025retain_acked_messages\030\007 \001(\010B\003\340A\001\022B\n"
           + "\032message_retention_duration\030\010"
           + " \001(\0132\031.google.protobuf.DurationB\003\340A\001\022?\n"
-          + "\006labels\030\t"
-          + " \003(\0132*.google.pubsub.v1.Subscription.LabelsEntryB\003\340A\001\022$\n"
+          + "\006labels\030\t \003(\0132*.goo"
+          + "gle.pubsub.v1.Subscription.LabelsEntryB\003\340A\001\022$\n"
           + "\027enable_message_ordering\030\n"
           + " \001(\010B\003\340A\001\022B\n"
           + "\021expiration_policy\030\013"
@@ -712,15 +712,15 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
           + "\006filter\030\014 \001(\tB\003\340A\001\022C\n"
           + "\022dead_letter_policy\030\r"
           + " \001(\0132\".google.pubsub.v1.DeadLetterPolicyB\003\340A\001\0228\n"
-          + "\014retry_policy\030\016 "
-          + "\001(\0132\035.google.pubsub.v1.RetryPolicyB\003\340A\001\022\025\n"
+          + "\014retry_policy\030\016"
+          + " \001(\0132\035.google.pubsub.v1.RetryPolicyB\003\340A\001\022\025\n"
           + "\010detached\030\017 \001(\010B\003\340A\001\022)\n"
           + "\034enable_exactly_once_delivery\030\020 \001(\010B\003\340A\001\022H\n"
           + " topic_message_retention_duration\030\021"
           + " \001(\0132\031.google.protobuf.DurationB\003\340A\003\0228\n"
           + "\005state\030\023 \001(\0162$.google.pubsub.v1.Subscription.StateB\003\340A\003\022i\n"
-          + "\037analytics_hub_subscription_info\030\027 \001(\0132;"
-          + ".google.pubsub.v1.Subscription.AnalyticsHubSubscriptionInfoB\003\340A\003\022C\n"
+          + "\037analytics_hub_subscription_info\030\027 \001(\0132;.google.pubsub.v1.Subs"
+          + "cription.AnalyticsHubSubscriptionInfoB\003\340A\003\022C\n"
           + "\022message_transforms\030\031"
           + " \003(\0132\".google.pubsub.v1.MessageTransformB\003\340A\001\022A\n"
           + "\004tags\030\032 \003(\0132(.google.pubsub.v1.Subscription.TagsEntryB"
@@ -739,8 +739,8 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
           + "\021STATE_UNSPECIFIED\020\000\022\n\n"
           + "\006ACTIVE\020\001\022\022\n"
           + "\016RESOURCE_ERROR\020\002:u\352Ar\n"
-          + "\"pubsub.googleapis.com/Subscription\022/"
-          + "projects/{project}/subscriptions/{subscription}*\r"
+          + "\"pubsub.googleapis."
+          + "com/Subscription\022/projects/{project}/subscriptions/{subscription}*\r"
           + "subscriptions2\014subscription\"\177\n"
           + "\013RetryPolicy\0227\n"
           + "\017minimum_backoff\030\001"
@@ -754,12 +754,12 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
           + "\003ttl\030\001 \001(\0132\031.google.protobuf.DurationB\003\340A\001\"\232\004\n\n"
           + "PushConfig\022\032\n\r"
           + "push_endpoint\030\001 \001(\tB\003\340A\001\022E\n\n"
-          + "attributes\030\002"
-          + " \003(\0132,.google.pubsub.v1.PushConfig.AttributesEntryB\003\340A\001\022A\n\n"
+          + "attributes\030\002 \003(\0132,.google"
+          + ".pubsub.v1.PushConfig.AttributesEntryB\003\340A\001\022A\n\n"
           + "oidc_token\030\003"
           + " \001(\0132&.google.pubsub.v1.PushConfig.OidcTokenB\003\340A\001H\000\022I\n"
-          + "\016pubsub_wrapper\030\004 \001(\0132*.go"
-          + "ogle.pubsub.v1.PushConfig.PubsubWrapperB\003\340A\001H\001\022A\n\n"
+          + "\016pubsub_wrapper\030\004"
+          + " \001(\0132*.google.pubsub.v1.PushConfig.PubsubWrapperB\003\340A\001H\001\022A\n\n"
           + "no_wrapper\030\005"
           + " \001(\0132&.google.pubsub.v1.PushConfig.NoWrapperB\003\340A\001H\001\032F\n"
           + "\tOidcToken\022\"\n"
@@ -778,8 +778,8 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
           + "\020use_topic_schema\030\002 \001(\010B\003\340A\001\022\033\n"
           + "\016write_metadata\030\003 \001(\010B\003\340A\001\022 \n"
           + "\023drop_unknown_fields\030\004 \001(\010B\003\340A\001\022:\n"
-          + "\005state\030\005 \001(\0162"
-          + "&.google.pubsub.v1.BigQueryConfig.StateB\003\340A\003\022\035\n"
+          + "\005state\030\005"
+          + " \001(\0162&.google.pubsub.v1.BigQueryConfig.StateB\003\340A\003\022\035\n"
           + "\020use_table_schema\030\006 \001(\010B\003\340A\001\022\"\n"
           + "\025service_account_email\030\007 \001(\tB\003\340A\001\"\212\001\n"
           + "\005State\022\025\n"
@@ -795,16 +795,16 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
           + "\017filename_suffix\030\003 \001(\tB\003\340A\001\022%\n"
           + "\030filename_datetime_format\030\n"
           + " \001(\tB\003\340A\001\022K\n"
-          + "\013text_config\030\004"
-          + " \001(\0132/.google.pubsub.v1.CloudStorageConfig.TextConfigB\003\340A\001H\000\022K\n"
-          + "\013avro_config\030\005"
-          + " \001(\0132/.google.pubsub.v1.CloudStorageConfig.AvroConfigB\003\340A\001H\000\0224\n"
+          + "\013text_config\030\004 \001(\0132/.goo"
+          + "gle.pubsub.v1.CloudStorageConfig.TextConfigB\003\340A\001H\000\022K\n"
+          + "\013avro_config\030\005 \001(\0132/.google"
+          + ".pubsub.v1.CloudStorageConfig.AvroConfigB\003\340A\001H\000\0224\n"
           + "\014max_duration\030\006"
           + " \001(\0132\031.google.protobuf.DurationB\003\340A\001\022\026\n"
           + "\tmax_bytes\030\007 \001(\003B\003\340A\001\022\031\n"
           + "\014max_messages\030\010 \001(\003B\003\340A\001\022>\n"
-          + "\005state\030\t \001(\0162*.google.p"
-          + "ubsub.v1.CloudStorageConfig.StateB\003\340A\003\022\"\n"
+          + "\005state\030\t"
+          + " \001(\0162*.google.pubsub.v1.CloudStorageConfig.StateB\003\340A\003\022\"\n"
           + "\025service_account_email\030\013 \001(\tB\003\340A\001\032\014\n\n"
           + "TextConfig\032H\n\n"
           + "AvroConfig\022\033\n"
@@ -822,26 +822,26 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
           + "\006ack_id\030\001 \001(\tB\003\340A\001\0225\n"
           + "\007message\030\002"
           + " \001(\0132\037.google.pubsub.v1.PubsubMessageB\003\340A\001\022\035\n"
-          + "\020delivery_attempt\030\003 \001(\005B\003\340A\001\"Z\n"
-          + "\026GetSubscriptionRequest\022@\n"
-          + "\014subscription\030\001 \001(\tB*\340A\002\372A$\n"
+          + "\020delivery_attempt\030\003 \001(\005B\003\340A\001\"]\n"
+          + "\026GetSubscriptionRequest\022C\n"
+          + "\014subscription\030\001 \001(\tB-\340A\002\340A\010\372A$\n"
           + "\"pubsub.googleapis.com/Subscription\"\214\001\n"
           + "\031UpdateSubscriptionRequest\0229\n"
           + "\014subscription\030\001"
           + " \001(\0132\036.google.pubsub.v1.SubscriptionB\003\340A\002\0224\n"
           + "\013update_mask\030\002"
-          + " \001(\0132\032.google.protobuf.FieldMaskB\003\340A\002\"\221\001\n"
-          + "\030ListSubscriptionsRequest\022D\n"
-          + "\007project\030\001 \001(\tB3\340A\002\372A-\n"
+          + " \001(\0132\032.google.protobuf.FieldMaskB\003\340A\002\"\224\001\n"
+          + "\030ListSubscriptionsRequest\022G\n"
+          + "\007project\030\001 \001(\tB6\340A\002\340A\010\372A-\n"
           + "+cloudresourcemanager.googleapis.com/Project\022\026\n"
           + "\tpage_size\030\002 \001(\005B\003\340A\001\022\027\n\n"
           + "page_token\030\003 \001(\tB\003\340A\001\"u\n"
           + "\031ListSubscriptionsResponse\022:\n\r"
-          + "subscriptions\030\001 \003("
-          + "\0132\036.google.pubsub.v1.SubscriptionB\003\340A\001\022\034\n"
-          + "\017next_page_token\030\002 \001(\tB\003\340A\001\"]\n"
-          + "\031DeleteSubscriptionRequest\022@\n"
-          + "\014subscription\030\001 \001(\tB*\340A\002\372A$\n"
+          + "subscriptions\030\001"
+          + " \003(\0132\036.google.pubsub.v1.SubscriptionB\003\340A\001\022\034\n"
+          + "\017next_page_token\030\002 \001(\tB\003\340A\001\"`\n"
+          + "\031DeleteSubscriptionRequest\022C\n"
+          + "\014subscription\030\001 \001(\tB-\340A\002\340A\010\372A$\n"
           + "\"pubsub.googleapis.com/Subscription\"\223\001\n"
           + "\027ModifyPushConfigRequest\022@\n"
           + "\014subscription\030\001 \001(\tB*\340A\002\372A$\n"
@@ -878,15 +878,14 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
           + "\020protocol_version\030\n"
           + " \001(\003B\003\340A\001\"\236\006\n"
           + "\025StreamingPullResponse\022A\n"
-          + "\021received_messages\030\001"
-          + " \003(\0132!.google.pubsub.v1.ReceivedMessageB\003\340A\001\022f\n"
-          + "\030acknowledge_confirmation\030\005 \001(\0132?.google.pubsub.v1.StreamingP"
-          + "ullResponse.AcknowledgeConfirmationB\003\340A\001\022t\n"
-          + " modify_ack_deadline_confirmation\030\003 \001"
-          + "(\0132E.google.pubsub.v1.StreamingPullRespo"
-          + "nse.ModifyAckDeadlineConfirmationB\003\340A\001\022d\n"
-          + "\027subscription_properties\030\004 \001(\0132>.google"
-          + ".pubsub.v1.StreamingPullResponse.SubscriptionPropertiesB\003\340A\001\032\224\001\n"
+          + "\021received_messages\030\001 "
+          + "\003(\0132!.google.pubsub.v1.ReceivedMessageB\003\340A\001\022f\n"
+          + "\030acknowledge_confirmation\030\005 \001(\0132?."
+          + "google.pubsub.v1.StreamingPullResponse.AcknowledgeConfirmationB\003\340A\001\022t\n"
+          + " modify_ack_deadline_confirmation\030\003 \001(\0132E.google.p"
+          + "ubsub.v1.StreamingPullResponse.ModifyAckDeadlineConfirmationB\003\340A\001\022d\n"
+          + "\027subscription_properties\030\004 \001(\0132>.google.pubsub.v1.St"
+          + "reamingPullResponse.SubscriptionPropertiesB\003\340A\001\032\224\001\n"
           + "\027AcknowledgeConfirmation\022\024\n"
           + "\007ack_ids\030\001 \003(\tB\003\340A\001\022\034\n"
           + "\017invalid_ack_ids\030\002 \003(\tB\003\340A\001\022\036\n"
@@ -898,18 +897,19 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
           + "\030temporary_failed_ack_ids\030\003 \003(\tB\003\340A\001\032k\n"
           + "\026SubscriptionProperties\022*\n"
           + "\035exactly_once_delivery_enabled\030\001 \001(\010B\003\340A\001\022%\n"
-          + "\030message_ordering_enabled\030\002 \001(\010B\003\340A\001\"\201\003\n"
-          + "\025CreateSnapshotRequest\0224\n"
-          + "\004name\030\001 \001(\tB&\340A\002\372A \n"
+          + "\030message_ordering_enabled\030\002 \001(\010B\003\340A\001\"\204\003\n"
+          + "\025CreateSnapshotRequest\0227\n"
+          + "\004name\030\001 \001(\tB)\340A\002\340A\010\372A \n"
           + "\036pubsub.googleapis.com/Snapshot\022@\n"
           + "\014subscription\030\002 \001(\tB*\340A\002\372A$\n"
           + "\"pubsub.googleapis.com/Subscription\022H\n"
-          + "\006labels\030\003 \003(\01323.google.pubsub.v1.CreateSnapshot",
-      "Request.LabelsEntryB\003\340A\001\022J\n"
+          + "\006labels\030\003 \003(\01323.g",
+      "oogle.pubsub.v1.CreateSnapshotRequest.LabelsEntryB\003\340A\001\022J\n"
           + "\004tags\030\004 \003(\01321.google.pubsub.v1.CreateSnapshotRequest.TagsEntryB"
           + "\t\340A\004\340A\005\340A\001\032-\n"
           + "\013LabelsEntry\022\013\n"
-          + "\003key\030\001 \001(\t\022\r\n"
+          + "\003key\030\001 \001(\t\022\r"
+          + "\n"
           + "\005value\030\002 \001(\t:\0028\001\032+\n"
           + "\tTagsEntry\022\013\n"
           + "\003key\030\001 \001(\t\022\r\n"
@@ -923,26 +923,26 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
           + "\005topic\030\002 \001(\tB#\340A\001\372A\035\n"
           + "\033pubsub.googleapis.com/Topic\0224\n"
           + "\013expire_time\030\003 \001(\0132\032.google.protobuf.TimestampB\003\340A\001\022;\n"
-          + "\006labels\030\004 \003(\0132&."
-          + "google.pubsub.v1.Snapshot.LabelsEntryB\003\340A\001\032-\n"
+          + "\006labels\030\004"
+          + " \003(\0132&.google.pubsub.v1.Snapshot.LabelsEntryB\003\340A\001\032-\n"
           + "\013LabelsEntry\022\013\n"
           + "\003key\030\001 \001(\t\022\r\n"
           + "\005value\030\002 \001(\t:\0028\001:a\352A^\n"
           + "\036pubsub.googleapis.com/Snapshot\022\'projects/{project}/snapshots/{snapshot}*"
-          + "\tsnapshots2\010snapshot\"N\n"
-          + "\022GetSnapshotRequest\0228\n"
-          + "\010snapshot\030\001 \001(\tB&\340A\002\372A \n"
-          + "\036pubsub.googleapis.com/Snapshot\"\215\001\n"
-          + "\024ListSnapshotsRequest\022D\n"
-          + "\007project\030\001 \001(\tB3\340A\002\372A-\n"
+          + "\tsnapshots2\010snapshot\"Q\n"
+          + "\022GetSnapshotRequest\022;\n"
+          + "\010snapshot\030\001 \001(\tB)\340A\002\340A\010\372A \n"
+          + "\036pubsub.googleapis.com/Snapshot\"\220\001\n"
+          + "\024ListSnapshotsRequest\022G\n"
+          + "\007project\030\001 \001(\tB6\340A\002\340A\010\372A-\n"
           + "+cloudresourcemanager.googleapis.com/Project\022\026\n"
           + "\tpage_size\030\002 \001(\005B\003\340A\001\022\027\n\n"
           + "page_token\030\003 \001(\tB\003\340A\001\"i\n"
           + "\025ListSnapshotsResponse\0222\n"
           + "\tsnapshots\030\001 \003(\0132\032.google.pubsub.v1.SnapshotB\003\340A\001\022\034\n"
-          + "\017next_page_token\030\002 \001(\tB\003\340A\001\"Q\n"
-          + "\025DeleteSnapshotRequest\0228\n"
-          + "\010snapshot\030\001 \001(\tB&\340A\002\372A \n"
+          + "\017next_page_token\030\002 \001(\tB\003\340A\001\"T\n"
+          + "\025DeleteSnapshotRequest\022;\n"
+          + "\010snapshot\030\001 \001(\tB)\340A\002\340A\010\372A \n"
           + "\036pubsub.googleapis.com/Snapshot\"\306\001\n"
           + "\013SeekRequest\022@\n"
           + "\014subscription\030\001 \001(\tB*\340A\002\372A$\n"
@@ -953,97 +953,98 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
           + "\006target\"\016\n"
           + "\014SeekResponse2\270\013\n"
           + "\tPublisher\022q\n"
-          + "\013CreateTopic\022\027.google.pubsub.v1.Topic\032\027.goog"
-          + "le.pubsub.v1.Topic\"0\332A\004name\202\323\344\223\002#\032\036/v1/{name=projects/*/topics/*}:\001*\022\221\001\n"
-          + "\013UpdateTopic\022$.google.pubsub.v1.UpdateTopicReque"
-          + "st\032\027.google.pubsub.v1.Topic\"C\332A\021topic,up"
-          + "date_mask\202\323\344\223\002)2$/v1/{topic.name=projects/*/topics/*}:\001*\022\223\001\n"
-          + "\007Publish\022 .google.pubsub.v1.PublishRequest\032!.google.pubsub.v"
-          + "1.PublishResponse\"C\332A\016topic,messages\202\323\344\223"
-          + "\002,\"\'/v1/{topic=projects/*/topics/*}:publish:\001*\022w\n"
-          + "\010GetTopic\022!.google.pubsub.v1.GetTopicRequest\032\027.google.pubsub.v1.Topic\"/"
-          + "\332A\005topic\202\323\344\223\002!\022\037/v1/{topic=projects/*/topics/*}\022\212\001\n\n"
-          + "ListTopics\022#.google.pubsub.v1.ListTopicsRequest\032$.google.pubsub.v1.L"
-          + "istTopicsResponse\"1\332A\007project\202\323\344\223\002!\022\037/v1/{project=projects/*}/topics\022\272\001\n"
-          + "\026ListTopicSubscriptions\022/.google.pubsub.v1.ListT"
-          + "opicSubscriptionsRequest\0320.google.pubsub"
-          + ".v1.ListTopicSubscriptionsResponse\"=\332A\005t"
-          + "opic\202\323\344\223\002/\022-/v1/{topic=projects/*/topics/*}/subscriptions\022\252\001\n"
-          + "\022ListTopicSnapshots\022+.google.pubsub.v1.ListTopicSnapshotsRe"
-          + "quest\032,.google.pubsub.v1.ListTopicSnapsh"
-          + "otsResponse\"9\332A\005topic\202\323\344\223\002+\022)/v1/{topic=projects/*/topics/*}/snapshots\022|\n"
-          + "\013DeleteTopic\022$.google.pubsub.v1.DeleteTopicRequ"
-          + "est\032\026.google.protobuf.Empty\"/\332A\005topic\202\323\344\223\002!*\037/v1/{topic=projects/*/topics/*}\022\255\001\n"
-          + "\022DetachSubscription\022+.google.pubsub.v1.D"
-          + "etachSubscriptionRequest\032,.google.pubsub"
-          + ".v1.DetachSubscriptionResponse\"<\202\323\344\223\0026\"4"
-          + "/v1/{subscription=projects/*/subscriptio"
-          + "ns/*}:detach\032p\312A\025pubsub.googleapis.com\322A"
-          + "Uhttps://www.googleapis.com/auth/cloud-p"
-          + "latform,https://www.googleapis.com/auth/pubsub2\322\025\n\n"
+          + "\013CreateTopic\022\027.google.pubsub.v1.Topic\032\027.googl"
+          + "e.pubsub.v1.Topic\"0\332A\004name\202\323\344\223\002#\032\036/v1/{name=projects/*/topics/*}:\001*\022\221\001\n"
+          + "\013UpdateTopic\022$.google.pubsub.v1.UpdateTopicReques"
+          + "t\032\027.google.pubsub.v1.Topic\"C\332A\021topic,upd"
+          + "ate_mask\202\323\344\223\002)2$/v1/{topic.name=projects/*/topics/*}:\001*\022\223\001\n"
+          + "\007Publish\022 .google.pubsub.v1.PublishRequest\032!.google.pubsub.v1"
+          + ".PublishResponse\"C\332A\016topic,messages\202\323\344\223\002"
+          + ",\"\'/v1/{topic=projects/*/topics/*}:publish:\001*\022w\n"
+          + "\010GetTopic\022!.google.pubsub.v1.Get"
+          + "TopicRequest\032\027.google.pubsub.v1.Topic\"/\332"
+          + "A\005topic\202\323\344\223\002!\022\037/v1/{topic=projects/*/topics/*}\022\212\001\n\n"
+          + "ListTopics\022#.google.pubsub.v1.ListTopicsRequest\032$.google.pubsub.v1.Li"
+          + "stTopicsResponse\"1\332A\007project\202\323\344\223\002!\022\037/v1/{project=projects/*}/topics\022\272\001\n"
+          + "\026ListTopicSubscriptions\022/.google.pubsub.v1.ListTo"
+          + "picSubscriptionsRequest\0320.google.pubsub."
+          + "v1.ListTopicSubscriptionsResponse\"=\332A\005to"
+          + "pic\202\323\344\223\002/\022-/v1/{topic=projects/*/topics/*}/subscriptions\022\252\001\n"
+          + "\022ListTopicSnapshots\022+.google.pubsub.v1.ListTopicSnapshotsReq"
+          + "uest\032,.google.pubsub.v1.ListTopicSnapsho"
+          + "tsResponse\"9\332A\005topic\202\323\344\223\002+\022)/v1/{topic=projects/*/topics/*}/snapshots\022|\n"
+          + "\013DeleteTopic\022$.google.pubsub.v1.DeleteTopicReque"
+          + "st\032\026.google.protobuf.Empty\"/\332A\005topic\202\323\344\223\002!*\037/v1/{topic=projects/*/topics/*}\022\255\001\n"
+          + "\022DetachSubscription\022+.google.pubsub.v1.De"
+          + "tachSubscriptionRequest\032,.google.pubsub."
+          + "v1.DetachSubscriptionResponse\"<\202\323\344\223\0026\"4/"
+          + "v1/{subscription=projects/*/subscription"
+          + "s/*}:detach\032p\312A\025pubsub.googleapis.com\322AU"
+          + "https://www.googleapis.com/auth/cloud-pl"
+          + "atform,https://www.googleapis.com/auth/pubsub2\322\025\n\n"
           + "Subscriber\022\264\001\n"
-          + "\022CreateSubscription\022\036.google.pubsub.v1.Subscription\032\036.g"
-          + "oogle.pubsub.v1.Subscription\"^\332A+name,to"
-          + "pic,push_config,ack_deadline_seconds\202\323\344\223"
-          + "\002*\032%/v1/{name=projects/*/subscriptions/*}:\001*\022\241\001\n"
-          + "\017GetSubscription\022(.google.pubsub.v1.GetSubscriptionRequest\032\036.google.pubs"
-          + "ub.v1.Subscription\"D\332A\014subscription\202\323\344\223\002"
-          + "/\022-/v1/{subscription=projects/*/subscriptions/*}\022\273\001\n"
-          + "\022UpdateSubscription\022+.google.pubsub.v1.UpdateSubscriptionRequest\032\036.g"
-          + "oogle.pubsub.v1.Subscription\"X\332A\030subscri"
-          + "ption,update_mask\202\323\344\223\002722/v1/{subscripti"
-          + "on.name=projects/*/subscriptions/*}:\001*\022\246\001\n"
-          + "\021ListSubscriptions\022*.google.pubsub.v1."
-          + "ListSubscriptionsRequest\032+.google.pubsub"
-          + ".v1.ListSubscriptionsResponse\"8\332A\007projec"
-          + "t\202\323\344\223\002(\022&/v1/{project=projects/*}/subscriptions\022\237\001\n"
-          + "\022DeleteSubscription\022+.google.pubsub.v1.DeleteSubscriptionRequest\032\026.go"
-          + "ogle.protobuf.Empty\"D\332A\014subscription\202\323\344\223"
-          + "\002/*-/v1/{subscription=projects/*/subscriptions/*}\022\317\001\n"
-          + "\021ModifyAckDeadline\022*.google.pubsub.v1.ModifyAckDeadlineRequest\032\026.go"
-          + "ogle.protobuf.Empty\"v\332A)subscription,ack"
-          + "_ids,ack_deadline_seconds\202\323\344\223\002D\"?/v1/{su"
-          + "bscription=projects/*/subscriptions/*}:modifyAckDeadline:\001*\022\250\001\n"
-          + "\013Acknowledge\022$.google.pubsub.v1.AcknowledgeRequest\032\026.goog"
-          + "le.protobuf.Empty\"[\332A\024subscription,ack_i"
-          + "ds\202\323\344\223\002>\"9/v1/{subscription=projects/*/subscriptions/*}:acknowledge:\001*\022\320\001\n"
-          + "\004Pull\022\035.google.pubsub.v1.PullRequest\032\036.google."
-          + "pubsub.v1.PullResponse\"\210\001\332A,subscription"
-          + ",return_immediately,max_messages\332A\031subsc"
-          + "ription,max_messages\202\323\344\223\0027\"2/v1/{subscri"
-          + "ption=projects/*/subscriptions/*}:pull:\001*\022f\n\r"
-          + "StreamingPull\022&.google.pubsub.v1.St"
-          + "reamingPullRequest\032\'.google.pubsub.v1.StreamingPullResponse\"\000(\0010\001\022\273\001\n"
-          + "\020ModifyPushConfig\022).google.pubsub.v1.ModifyPushConf"
-          + "igRequest\032\026.google.protobuf.Empty\"d\332A\030su"
-          + "bscription,push_config\202\323\344\223\002C\">/v1/{subsc"
-          + "ription=projects/*/subscriptions/*}:modifyPushConfig:\001*\022\211\001\n"
-          + "\013GetSnapshot\022$.google.pubsub.v1.GetSnapshotRequest\032\032.google.p"
-          + "ubsub.v1.Snapshot\"8\332A\010snapshot\202\323\344\223\002\'\022%/v1/{snapshot=projects/*/snapshots/*}\022\226\001\n\r"
-          + "ListSnapshots\022&.google.pubsub.v1.ListSna"
-          + "pshotsRequest\032\'.google.pubsub.v1.ListSna"
-          + "pshotsResponse\"4\332A\007project\202\323\344\223\002$\022\"/v1/{project=projects/*}/snapshots\022\227\001\n"
-          + "\016CreateSnapshot\022\'.google.pubsub.v1.CreateSnapsho"
-          + "tRequest\032\032.google.pubsub.v1.Snapshot\"@\332A"
-          + "\021name,subscription\202\323\344\223\002&\032!/v1/{name=projects/*/snapshots/*}:\001*\022\243\001\n"
-          + "\016UpdateSnapshot\022\'.google.pubsub.v1.UpdateSnapshotReque"
-          + "st\032\032.google.pubsub.v1.Snapshot\"L\332A\024snaps"
-          + "hot,update_mask\202\323\344\223\002/2*/v1/{snapshot.name=projects/*/snapshots/*}:\001*\022\213\001\n"
-          + "\016DeleteSnapshot\022\'.google.pubsub.v1.DeleteSnapsho"
-          + "tRequest\032\026.google.protobuf.Empty\"8\332A\010sna"
-          + "pshot\202\323\344\223\002\'*%/v1/{snapshot=projects/*/snapshots/*}\022\204\001\n"
-          + "\004Seek\022\035.google.pubsub.v1.SeekRequest\032\036.google.pubsub.v1.SeekRespon"
-          + "se\"=\202\323\344\223\0027\"2/v1/{subscription=projects/*"
-          + "/subscriptions/*}:seek:\001*\032p\312A\025pubsub.goo"
-          + "gleapis.com\322AUhttps://www.googleapis.com"
-          + "/auth/cloud-platform,https://www.googleapis.com/auth/pubsubB\247\003\n"
-          + "\024com.google.pubsub.v1B\013PubsubProtoP\001Z5cloud.google.com/go"
-          + "/pubsub/v2/apiv1/pubsubpb;pubsubpb\252\002\026Goo"
-          + "gle.Cloud.PubSub.V1\312\002\026Google\\Cloud\\PubSub\\V1\352\002\031Google::Cloud::PubSub::V1\352Ax\n"
-          + "!cloudkms.googleapis.com/CryptoKey\022Sprojects"
-          + "/{project}/locations/{location}/keyRings/{key_ring}/cryptoKeys/{crypto_key}\352A\177\n"
-          + "#analyticshub.googleapis.com/Listing\022Xprojects/{project}/locations/{location}/dat"
-          + "aExchanges/{data_exchange}/listings/{listing}b\006proto3"
+          + "\022CreateSubscription\022\036.google.pubsub.v1.Subscription\032\036.go"
+          + "ogle.pubsub.v1.Subscription\"^\332A+name,top"
+          + "ic,push_config,ack_deadline_seconds\202\323\344\223\002"
+          + "*\032%/v1/{name=projects/*/subscriptions/*}:\001*\022\241\001\n"
+          + "\017GetSubscription\022(.google.pubsub.v1.GetSubscriptionRequest\032\036.google.pubsu"
+          + "b.v1.Subscription\"D\332A\014subscription\202\323\344\223\002/"
+          + "\022-/v1/{subscription=projects/*/subscriptions/*}\022\273\001\n"
+          + "\022UpdateSubscription\022+.google.pubsub.v1.UpdateSubscriptionRequest\032\036.go"
+          + "ogle.pubsub.v1.Subscription\"X\332A\030subscrip"
+          + "tion,update_mask\202\323\344\223\002722/v1/{subscriptio"
+          + "n.name=projects/*/subscriptions/*}:\001*\022\246\001\n"
+          + "\021ListSubscriptions\022*.google.pubsub.v1.L"
+          + "istSubscriptionsRequest\032+.google.pubsub."
+          + "v1.ListSubscriptionsResponse\"8\332A\007project"
+          + "\202\323\344\223\002(\022&/v1/{project=projects/*}/subscriptions\022\237\001\n"
+          + "\022DeleteSubscription\022+.google.pubsub.v1.DeleteSubscriptionRequest\032\026.goo"
+          + "gle.protobuf.Empty\"D\332A\014subscription\202\323\344\223\002"
+          + "/*-/v1/{subscription=projects/*/subscriptions/*}\022\317\001\n"
+          + "\021ModifyAckDeadline\022*.google.pubsub.v1.ModifyAckDeadlineRequest\032\026.goo"
+          + "gle.protobuf.Empty\"v\332A)subscription,ack_"
+          + "ids,ack_deadline_seconds\202\323\344\223\002D\"?/v1/{sub"
+          + "scription=projects/*/subscriptions/*}:modifyAckDeadline:\001*\022\250\001\n"
+          + "\013Acknowledge\022$.google.pubsub.v1.AcknowledgeRequest\032\026.googl"
+          + "e.protobuf.Empty\"[\332A\024subscription,ack_id"
+          + "s\202\323\344\223\002>\"9/v1/{subscription=projects/*/subscriptions/*}:acknowledge:\001*\022\320\001\n"
+          + "\004Pull\022\035.google.pubsub.v1.PullRequest\032\036.google.p"
+          + "ubsub.v1.PullResponse\"\210\001\332A,subscription,"
+          + "return_immediately,max_messages\332A\031subscr"
+          + "iption,max_messages\202\323\344\223\0027\"2/v1/{subscrip"
+          + "tion=projects/*/subscriptions/*}:pull:\001*\022f\n\r"
+          + "StreamingPull\022&.google.pubsub.v1.Str"
+          + "eamingPullRequest\032\'.google.pubsub.v1.StreamingPullResponse\"\000(\0010\001\022\273\001\n"
+          + "\020ModifyPushConfig\022).google.pubsub.v1.ModifyPushConfi"
+          + "gRequest\032\026.google.protobuf.Empty\"d\332A\030sub"
+          + "scription,push_config\202\323\344\223\002C\">/v1/{subscr"
+          + "iption=projects/*/subscriptions/*}:modifyPushConfig:\001*\022\211\001\n"
+          + "\013GetSnapshot\022$.google.pubsub.v1.GetSnapshotRequest\032\032.google.pu"
+          + "bsub.v1.Snapshot\"8\332A\010snapshot\202\323\344\223\002\'\022%/v1/{snapshot=projects/*/snapshots/*}\022\226\001\n\r"
+          + "ListSnapshots\022&.google.pubsub.v1.ListSnap"
+          + "shotsRequest\032\'.google.pubsub.v1.ListSnap"
+          + "shotsResponse\"4\332A\007project\202\323\344\223\002$\022\"/v1/{project=projects/*}/snapshots\022\227\001\n"
+          + "\016CreateSnapshot\022\'.google.pubsub.v1.CreateSnapshot"
+          + "Request\032\032.google.pubsub.v1.Snapshot\"@\332A\021"
+          + "name,subscription\202\323\344\223\002&\032!/v1/{name=projects/*/snapshots/*}:\001*\022\243\001\n"
+          + "\016UpdateSnapshot\022\'.google.pubsub.v1.UpdateSnapshotReques"
+          + "t\032\032.google.pubsub.v1.Snapshot\"L\332A\024snapsh"
+          + "ot,update_mask\202\323\344\223\002/2*/v1/{snapshot.name=projects/*/snapshots/*}:\001*\022\213\001\n"
+          + "\016DeleteSnapshot\022\'.google.pubsub.v1.DeleteSnapshot"
+          + "Request\032\026.google.protobuf.Empty\"8\332A\010snap"
+          + "shot\202\323\344\223\002\'*%/v1/{snapshot=projects/*/snapshots/*}\022\204\001\n"
+          + "\004Seek\022\035.google.pubsub.v1.SeekRequest\032\036.google.pubsub.v1.SeekRespons"
+          + "e\"=\202\323\344\223\0027\"2/v1/{subscription=projects/*/"
+          + "subscriptions/*}:seek:\001*\032p\312A\025pubsub.goog"
+          + "leapis.com\322AUhttps://www.googleapis.com/"
+          + "auth/cloud-platform,https://www.googleapis.com/auth/pubsubB\247\003\n"
+          + "\024com.google.pubsub.v1B\013PubsubProtoP\001Z5cloud.google.com/go/"
+          + "pubsub/v2/apiv1/pubsubpb;pubsubpb\252\002\026Goog"
+          + "le.Cloud.PubSub.V1\312\002\026Google\\Cloud\\PubSub\\V1\352\002\031Google::Cloud::PubSub::V1\352Ax\n"
+          + "!cloudkms.googleapis.com/CryptoKey\022Sprojects/"
+          + "{project}/locations/{location}/keyRings/{key_ring}/cryptoKeys/{crypto_key}\352A\177\n"
+          + "#analyticshub.googleapis.com/Listing\022Xprojects/{project}/locations/{location}/data"
+          + "Exchanges/{data_exchange}/listings/{listing}b\006proto3"
     };
     descriptor =
         com.google.protobuf.Descriptors.FileDescriptor.internalBuildGeneratedFileFrom(
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/PullRequest.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/PullRequest.java
index c6dbf3f12..359811a33 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/PullRequest.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/PullRequest.java
@@ -141,7 +141,7 @@ public com.google.protobuf.ByteString getSubscriptionBytes() {
    * </code>
    *
    * @deprecated google.pubsub.v1.PullRequest.return_immediately is deprecated. See
-   *     google/pubsub/v1/pubsub.proto;l=2039
+   *     google/pubsub/v1/pubsub.proto;l=2052
    * @return The returnImmediately.
    */
   @java.lang.Override
@@ -700,7 +700,7 @@ public Builder setSubscriptionBytes(com.google.protobuf.ByteString value) {
      * </code>
      *
      * @deprecated google.pubsub.v1.PullRequest.return_immediately is deprecated. See
-     *     google/pubsub/v1/pubsub.proto;l=2039
+     *     google/pubsub/v1/pubsub.proto;l=2052
      * @return The returnImmediately.
      */
     @java.lang.Override
@@ -727,7 +727,7 @@ public boolean getReturnImmediately() {
      * </code>
      *
      * @deprecated google.pubsub.v1.PullRequest.return_immediately is deprecated. See
-     *     google/pubsub/v1/pubsub.proto;l=2039
+     *     google/pubsub/v1/pubsub.proto;l=2052
      * @param value The returnImmediately to set.
      * @return This builder for chaining.
      */
@@ -758,7 +758,7 @@ public Builder setReturnImmediately(boolean value) {
      * </code>
      *
      * @deprecated google.pubsub.v1.PullRequest.return_immediately is deprecated. See
-     *     google/pubsub/v1/pubsub.proto;l=2039
+     *     google/pubsub/v1/pubsub.proto;l=2052
      * @return This builder for chaining.
      */
     @java.lang.Deprecated
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/PullRequestOrBuilder.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/PullRequestOrBuilder.java
index 15b70709e..7c00e35b5 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/PullRequestOrBuilder.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/PullRequestOrBuilder.java
@@ -73,7 +73,7 @@ public interface PullRequestOrBuilder
    * </code>
    *
    * @deprecated google.pubsub.v1.PullRequest.return_immediately is deprecated. See
-   *     google/pubsub/v1/pubsub.proto;l=2039
+   *     google/pubsub/v1/pubsub.proto;l=2052
    * @return The returnImmediately.
    */
   @java.lang.Deprecated
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/Subscription.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/Subscription.java
index 9e637b08e..b36abdc68 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/Subscription.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/Subscription.java
@@ -1190,7 +1190,7 @@ public com.google.protobuf.Parser<AnalyticsHubSubscriptionInfo> getParserForType
    *
    *
    * <pre>
-   * Required. The name of the subscription. It must have the format
+   * Required. Identifier. The name of the subscription. It must have the format
    * `"projects/{project}/subscriptions/{subscription}"`. `{subscription}` must
    * start with a letter, and contain only letters (`[A-Za-z]`), numbers
    * (`[0-9]`), dashes (`-`), underscores (`_`), periods (`.`), tildes (`~`),
@@ -1198,7 +1198,9 @@ public com.google.protobuf.Parser<AnalyticsHubSubscriptionInfo> getParserForType
    * in length, and it must not start with `"goog"`.
    * </pre>
    *
-   * <code>string name = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   * <code>
+   * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER];
+   * </code>
    *
    * @return The name.
    */
@@ -1219,7 +1221,7 @@ public java.lang.String getName() {
    *
    *
    * <pre>
-   * Required. The name of the subscription. It must have the format
+   * Required. Identifier. The name of the subscription. It must have the format
    * `"projects/{project}/subscriptions/{subscription}"`. `{subscription}` must
    * start with a letter, and contain only letters (`[A-Za-z]`), numbers
    * (`[0-9]`), dashes (`-`), underscores (`_`), periods (`.`), tildes (`~`),
@@ -1227,7 +1229,9 @@ public java.lang.String getName() {
    * in length, and it must not start with `"goog"`.
    * </pre>
    *
-   * <code>string name = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   * <code>
+   * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER];
+   * </code>
    *
    * @return The bytes for name.
    */
@@ -3531,7 +3535,7 @@ public Builder mergeFrom(
      *
      *
      * <pre>
-     * Required. The name of the subscription. It must have the format
+     * Required. Identifier. The name of the subscription. It must have the format
      * `"projects/{project}/subscriptions/{subscription}"`. `{subscription}` must
      * start with a letter, and contain only letters (`[A-Za-z]`), numbers
      * (`[0-9]`), dashes (`-`), underscores (`_`), periods (`.`), tildes (`~`),
@@ -3539,7 +3543,9 @@ public Builder mergeFrom(
      * in length, and it must not start with `"goog"`.
      * </pre>
      *
-     * <code>string name = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     * <code>
+     * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER];
+     * </code>
      *
      * @return The name.
      */
@@ -3559,7 +3565,7 @@ public java.lang.String getName() {
      *
      *
      * <pre>
-     * Required. The name of the subscription. It must have the format
+     * Required. Identifier. The name of the subscription. It must have the format
      * `"projects/{project}/subscriptions/{subscription}"`. `{subscription}` must
      * start with a letter, and contain only letters (`[A-Za-z]`), numbers
      * (`[0-9]`), dashes (`-`), underscores (`_`), periods (`.`), tildes (`~`),
@@ -3567,7 +3573,9 @@ public java.lang.String getName() {
      * in length, and it must not start with `"goog"`.
      * </pre>
      *
-     * <code>string name = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     * <code>
+     * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER];
+     * </code>
      *
      * @return The bytes for name.
      */
@@ -3587,7 +3595,7 @@ public com.google.protobuf.ByteString getNameBytes() {
      *
      *
      * <pre>
-     * Required. The name of the subscription. It must have the format
+     * Required. Identifier. The name of the subscription. It must have the format
      * `"projects/{project}/subscriptions/{subscription}"`. `{subscription}` must
      * start with a letter, and contain only letters (`[A-Za-z]`), numbers
      * (`[0-9]`), dashes (`-`), underscores (`_`), periods (`.`), tildes (`~`),
@@ -3595,7 +3603,9 @@ public com.google.protobuf.ByteString getNameBytes() {
      * in length, and it must not start with `"goog"`.
      * </pre>
      *
-     * <code>string name = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     * <code>
+     * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER];
+     * </code>
      *
      * @param value The name to set.
      * @return This builder for chaining.
@@ -3614,7 +3624,7 @@ public Builder setName(java.lang.String value) {
      *
      *
      * <pre>
-     * Required. The name of the subscription. It must have the format
+     * Required. Identifier. The name of the subscription. It must have the format
      * `"projects/{project}/subscriptions/{subscription}"`. `{subscription}` must
      * start with a letter, and contain only letters (`[A-Za-z]`), numbers
      * (`[0-9]`), dashes (`-`), underscores (`_`), periods (`.`), tildes (`~`),
@@ -3622,7 +3632,9 @@ public Builder setName(java.lang.String value) {
      * in length, and it must not start with `"goog"`.
      * </pre>
      *
-     * <code>string name = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     * <code>
+     * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER];
+     * </code>
      *
      * @return This builder for chaining.
      */
@@ -3637,7 +3649,7 @@ public Builder clearName() {
      *
      *
      * <pre>
-     * Required. The name of the subscription. It must have the format
+     * Required. Identifier. The name of the subscription. It must have the format
      * `"projects/{project}/subscriptions/{subscription}"`. `{subscription}` must
      * start with a letter, and contain only letters (`[A-Za-z]`), numbers
      * (`[0-9]`), dashes (`-`), underscores (`_`), periods (`.`), tildes (`~`),
@@ -3645,7 +3657,9 @@ public Builder clearName() {
      * in length, and it must not start with `"goog"`.
      * </pre>
      *
-     * <code>string name = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     * <code>
+     * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER];
+     * </code>
      *
      * @param value The bytes for name to set.
      * @return This builder for chaining.
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/SubscriptionOrBuilder.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/SubscriptionOrBuilder.java
index 585c95c3e..fb8459de7 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/SubscriptionOrBuilder.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/SubscriptionOrBuilder.java
@@ -28,7 +28,7 @@ public interface SubscriptionOrBuilder
    *
    *
    * <pre>
-   * Required. The name of the subscription. It must have the format
+   * Required. Identifier. The name of the subscription. It must have the format
    * `"projects/{project}/subscriptions/{subscription}"`. `{subscription}` must
    * start with a letter, and contain only letters (`[A-Za-z]`), numbers
    * (`[0-9]`), dashes (`-`), underscores (`_`), periods (`.`), tildes (`~`),
@@ -36,7 +36,9 @@ public interface SubscriptionOrBuilder
    * in length, and it must not start with `"goog"`.
    * </pre>
    *
-   * <code>string name = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   * <code>
+   * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER];
+   * </code>
    *
    * @return The name.
    */
@@ -46,7 +48,7 @@ public interface SubscriptionOrBuilder
    *
    *
    * <pre>
-   * Required. The name of the subscription. It must have the format
+   * Required. Identifier. The name of the subscription. It must have the format
    * `"projects/{project}/subscriptions/{subscription}"`. `{subscription}` must
    * start with a letter, and contain only letters (`[A-Za-z]`), numbers
    * (`[0-9]`), dashes (`-`), underscores (`_`), periods (`.`), tildes (`~`),
@@ -54,7 +56,9 @@ public interface SubscriptionOrBuilder
    * in length, and it must not start with `"goog"`.
    * </pre>
    *
-   * <code>string name = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   * <code>
+   * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER];
+   * </code>
    *
    * @return The bytes for name.
    */
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/Topic.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/Topic.java
index 3719e7280..c1e75d4e4 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/Topic.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/Topic.java
@@ -252,7 +252,7 @@ private State(int value) {
    *
    *
    * <pre>
-   * Required. The name of the topic. It must have the format
+   * Required. Identifier. The name of the topic. It must have the format
    * `"projects/{project}/topics/{topic}"`. `{topic}` must start with a letter,
    * and contain only letters (`[A-Za-z]`), numbers (`[0-9]`), dashes (`-`),
    * underscores (`_`), periods (`.`), tildes (`~`), plus (`+`) or percent
@@ -260,7 +260,9 @@ private State(int value) {
    * must not start with `"goog"`.
    * </pre>
    *
-   * <code>string name = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   * <code>
+   * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER];
+   * </code>
    *
    * @return The name.
    */
@@ -281,7 +283,7 @@ public java.lang.String getName() {
    *
    *
    * <pre>
-   * Required. The name of the topic. It must have the format
+   * Required. Identifier. The name of the topic. It must have the format
    * `"projects/{project}/topics/{topic}"`. `{topic}` must start with a letter,
    * and contain only letters (`[A-Za-z]`), numbers (`[0-9]`), dashes (`-`),
    * underscores (`_`), periods (`.`), tildes (`~`), plus (`+`) or percent
@@ -289,7 +291,9 @@ public java.lang.String getName() {
    * must not start with `"goog"`.
    * </pre>
    *
-   * <code>string name = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   * <code>
+   * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER];
+   * </code>
    *
    * @return The bytes for name.
    */
@@ -1762,7 +1766,7 @@ public Builder mergeFrom(
      *
      *
      * <pre>
-     * Required. The name of the topic. It must have the format
+     * Required. Identifier. The name of the topic. It must have the format
      * `"projects/{project}/topics/{topic}"`. `{topic}` must start with a letter,
      * and contain only letters (`[A-Za-z]`), numbers (`[0-9]`), dashes (`-`),
      * underscores (`_`), periods (`.`), tildes (`~`), plus (`+`) or percent
@@ -1770,7 +1774,9 @@ public Builder mergeFrom(
      * must not start with `"goog"`.
      * </pre>
      *
-     * <code>string name = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     * <code>
+     * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER];
+     * </code>
      *
      * @return The name.
      */
@@ -1790,7 +1796,7 @@ public java.lang.String getName() {
      *
      *
      * <pre>
-     * Required. The name of the topic. It must have the format
+     * Required. Identifier. The name of the topic. It must have the format
      * `"projects/{project}/topics/{topic}"`. `{topic}` must start with a letter,
      * and contain only letters (`[A-Za-z]`), numbers (`[0-9]`), dashes (`-`),
      * underscores (`_`), periods (`.`), tildes (`~`), plus (`+`) or percent
@@ -1798,7 +1804,9 @@ public java.lang.String getName() {
      * must not start with `"goog"`.
      * </pre>
      *
-     * <code>string name = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     * <code>
+     * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER];
+     * </code>
      *
      * @return The bytes for name.
      */
@@ -1818,7 +1826,7 @@ public com.google.protobuf.ByteString getNameBytes() {
      *
      *
      * <pre>
-     * Required. The name of the topic. It must have the format
+     * Required. Identifier. The name of the topic. It must have the format
      * `"projects/{project}/topics/{topic}"`. `{topic}` must start with a letter,
      * and contain only letters (`[A-Za-z]`), numbers (`[0-9]`), dashes (`-`),
      * underscores (`_`), periods (`.`), tildes (`~`), plus (`+`) or percent
@@ -1826,7 +1834,9 @@ public com.google.protobuf.ByteString getNameBytes() {
      * must not start with `"goog"`.
      * </pre>
      *
-     * <code>string name = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     * <code>
+     * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER];
+     * </code>
      *
      * @param value The name to set.
      * @return This builder for chaining.
@@ -1845,7 +1855,7 @@ public Builder setName(java.lang.String value) {
      *
      *
      * <pre>
-     * Required. The name of the topic. It must have the format
+     * Required. Identifier. The name of the topic. It must have the format
      * `"projects/{project}/topics/{topic}"`. `{topic}` must start with a letter,
      * and contain only letters (`[A-Za-z]`), numbers (`[0-9]`), dashes (`-`),
      * underscores (`_`), periods (`.`), tildes (`~`), plus (`+`) or percent
@@ -1853,7 +1863,9 @@ public Builder setName(java.lang.String value) {
      * must not start with `"goog"`.
      * </pre>
      *
-     * <code>string name = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     * <code>
+     * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER];
+     * </code>
      *
      * @return This builder for chaining.
      */
@@ -1868,7 +1880,7 @@ public Builder clearName() {
      *
      *
      * <pre>
-     * Required. The name of the topic. It must have the format
+     * Required. Identifier. The name of the topic. It must have the format
      * `"projects/{project}/topics/{topic}"`. `{topic}` must start with a letter,
      * and contain only letters (`[A-Za-z]`), numbers (`[0-9]`), dashes (`-`),
      * underscores (`_`), periods (`.`), tildes (`~`), plus (`+`) or percent
@@ -1876,7 +1888,9 @@ public Builder clearName() {
      * must not start with `"goog"`.
      * </pre>
      *
-     * <code>string name = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     * <code>
+     * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER];
+     * </code>
      *
      * @param value The bytes for name to set.
      * @return This builder for chaining.
diff --git a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/TopicOrBuilder.java b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/TopicOrBuilder.java
index ea55bec4e..60080e167 100644
--- a/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/TopicOrBuilder.java
+++ b/proto-google-cloud-pubsub-v1/src/main/java/com/google/pubsub/v1/TopicOrBuilder.java
@@ -28,7 +28,7 @@ public interface TopicOrBuilder
    *
    *
    * <pre>
-   * Required. The name of the topic. It must have the format
+   * Required. Identifier. The name of the topic. It must have the format
    * `"projects/{project}/topics/{topic}"`. `{topic}` must start with a letter,
    * and contain only letters (`[A-Za-z]`), numbers (`[0-9]`), dashes (`-`),
    * underscores (`_`), periods (`.`), tildes (`~`), plus (`+`) or percent
@@ -36,7 +36,9 @@ public interface TopicOrBuilder
    * must not start with `"goog"`.
    * </pre>
    *
-   * <code>string name = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   * <code>
+   * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER];
+   * </code>
    *
    * @return The name.
    */
@@ -46,7 +48,7 @@ public interface TopicOrBuilder
    *
    *
    * <pre>
-   * Required. The name of the topic. It must have the format
+   * Required. Identifier. The name of the topic. It must have the format
    * `"projects/{project}/topics/{topic}"`. `{topic}` must start with a letter,
    * and contain only letters (`[A-Za-z]`), numbers (`[0-9]`), dashes (`-`),
    * underscores (`_`), periods (`.`), tildes (`~`), plus (`+`) or percent
@@ -54,7 +56,9 @@ public interface TopicOrBuilder
    * must not start with `"goog"`.
    * </pre>
    *
-   * <code>string name = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+   * <code>
+   * string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = IDENTIFIER];
+   * </code>
    *
    * @return The bytes for name.
    */
diff --git a/proto-google-cloud-pubsub-v1/src/main/proto/google/pubsub/v1/pubsub.proto b/proto-google-cloud-pubsub-v1/src/main/proto/google/pubsub/v1/pubsub.proto
index b542351d9..95dd7f829 100644
--- a/proto-google-cloud-pubsub-v1/src/main/proto/google/pubsub/v1/pubsub.proto
+++ b/proto-google-cloud-pubsub-v1/src/main/proto/google/pubsub/v1/pubsub.proto
@@ -847,13 +847,16 @@ message Topic {
     INGESTION_RESOURCE_ERROR = 2;
   }
 
-  // Required. The name of the topic. It must have the format
+  // Required. Identifier. The name of the topic. It must have the format
   // `"projects/{project}/topics/{topic}"`. `{topic}` must start with a letter,
   // and contain only letters (`[A-Za-z]`), numbers (`[0-9]`), dashes (`-`),
   // underscores (`_`), periods (`.`), tildes (`~`), plus (`+`) or percent
   // signs (`%`). It must be between 3 and 255 characters in length, and it
   // must not start with `"goog"`.
-  string name = 1 [(google.api.field_behavior) = REQUIRED];
+  string name = 1 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.field_behavior) = IDENTIFIER
+  ];
 
   // Optional. See [Creating and managing labels]
   // (https://cloud.google.com/pubsub/docs/labels).
@@ -960,10 +963,11 @@ message PubsubMessage {
 
 // Request for the GetTopic method.
 message GetTopicRequest {
-  // Required. The name of the topic to get.
+  // Required. Identifier. The name of the topic to get.
   // Format is `projects/{project}/topics/{topic}`.
   string topic = 1 [
     (google.api.field_behavior) = REQUIRED,
+    (google.api.field_behavior) = IDENTIFIER,
     (google.api.resource_reference) = { type: "pubsub.googleapis.com/Topic" }
   ];
 }
@@ -984,10 +988,11 @@ message UpdateTopicRequest {
 
 // Request for the Publish method.
 message PublishRequest {
-  // Required. The messages in the request will be published on this topic.
-  // Format is `projects/{project}/topics/{topic}`.
+  // Required. Identifier. The messages in the request will be published on this
+  // topic. Format is `projects/{project}/topics/{topic}`.
   string topic = 1 [
     (google.api.field_behavior) = REQUIRED,
+    (google.api.field_behavior) = IDENTIFIER,
     (google.api.resource_reference) = { type: "pubsub.googleapis.com/Topic" }
   ];
 
@@ -1005,10 +1010,11 @@ message PublishResponse {
 
 // Request for the `ListTopics` method.
 message ListTopicsRequest {
-  // Required. The name of the project in which to list topics.
+  // Required. Identifier. The name of the project in which to list topics.
   // Format is `projects/{project-id}`.
   string project = 1 [
     (google.api.field_behavior) = REQUIRED,
+    (google.api.field_behavior) = IDENTIFIER,
     (google.api.resource_reference) = {
       type: "cloudresourcemanager.googleapis.com/Project"
     }
@@ -1102,10 +1108,11 @@ message ListTopicSnapshotsResponse {
 
 // Request for the `DeleteTopic` method.
 message DeleteTopicRequest {
-  // Required. Name of the topic to delete.
+  // Required. Identifier. Name of the topic to delete.
   // Format is `projects/{project}/topics/{topic}`.
   string topic = 1 [
     (google.api.field_behavior) = REQUIRED,
+    (google.api.field_behavior) = IDENTIFIER,
     (google.api.resource_reference) = { type: "pubsub.googleapis.com/Topic" }
   ];
 }
@@ -1399,13 +1406,16 @@ message Subscription {
     string subscription = 2 [(google.api.field_behavior) = OPTIONAL];
   }
 
-  // Required. The name of the subscription. It must have the format
+  // Required. Identifier. The name of the subscription. It must have the format
   // `"projects/{project}/subscriptions/{subscription}"`. `{subscription}` must
   // start with a letter, and contain only letters (`[A-Za-z]`), numbers
   // (`[0-9]`), dashes (`-`), underscores (`_`), periods (`.`), tildes (`~`),
   // plus (`+`) or percent signs (`%`). It must be between 3 and 255 characters
   // in length, and it must not start with `"goog"`.
-  string name = 1 [(google.api.field_behavior) = REQUIRED];
+  string name = 1 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.field_behavior) = IDENTIFIER
+  ];
 
   // Required. The name of the topic from which this subscription is receiving
   // messages. Format is `projects/{project}/topics/{topic}`. The value of this
@@ -1934,10 +1944,11 @@ message ReceivedMessage {
 
 // Request for the GetSubscription method.
 message GetSubscriptionRequest {
-  // Required. The name of the subscription to get.
+  // Required. Identifier. The name of the subscription to get.
   // Format is `projects/{project}/subscriptions/{sub}`.
   string subscription = 1 [
     (google.api.field_behavior) = REQUIRED,
+    (google.api.field_behavior) = IDENTIFIER,
     (google.api.resource_reference) = {
       type: "pubsub.googleapis.com/Subscription"
     }
@@ -1957,10 +1968,11 @@ message UpdateSubscriptionRequest {
 
 // Request for the `ListSubscriptions` method.
 message ListSubscriptionsRequest {
-  // Required. The name of the project in which to list subscriptions.
-  // Format is `projects/{project-id}`.
+  // Required. Identifier. The name of the project in which to list
+  // subscriptions. Format is `projects/{project-id}`.
   string project = 1 [
     (google.api.field_behavior) = REQUIRED,
+    (google.api.field_behavior) = IDENTIFIER,
     (google.api.resource_reference) = {
       type: "cloudresourcemanager.googleapis.com/Project"
     }
@@ -1989,10 +2001,11 @@ message ListSubscriptionsResponse {
 
 // Request for the DeleteSubscription method.
 message DeleteSubscriptionRequest {
-  // Required. The subscription to delete.
+  // Required. Identifier. The subscription to delete.
   // Format is `projects/{project}/subscriptions/{sub}`.
   string subscription = 1 [
     (google.api.field_behavior) = REQUIRED,
+    (google.api.field_behavior) = IDENTIFIER,
     (google.api.resource_reference) = {
       type: "pubsub.googleapis.com/Subscription"
     }
@@ -2260,14 +2273,15 @@ message StreamingPullResponse {
 
 // Request for the `CreateSnapshot` method.
 message CreateSnapshotRequest {
-  // Required. User-provided name for this snapshot. If the name is not provided
-  // in the request, the server will assign a random name for this snapshot on
-  // the same project as the subscription. Note that for REST API requests, you
-  // must specify a name.  See the [resource name
+  // Required. Identifier. User-provided name for this snapshot. If the name is
+  // not provided in the request, the server will assign a random name for this
+  // snapshot on the same project as the subscription. Note that for REST API
+  // requests, you must specify a name.  See the [resource name
   // rules](https://cloud.google.com/pubsub/docs/pubsub-basics#resource_names).
   // Format is `projects/{project}/snapshots/{snap}`.
   string name = 1 [
     (google.api.field_behavior) = REQUIRED,
+    (google.api.field_behavior) = IDENTIFIER,
     (google.api.resource_reference) = { type: "pubsub.googleapis.com/Snapshot" }
   ];
 
@@ -2356,20 +2370,22 @@ message Snapshot {
 
 // Request for the GetSnapshot method.
 message GetSnapshotRequest {
-  // Required. The name of the snapshot to get.
+  // Required. Identifier. The name of the snapshot to get.
   // Format is `projects/{project}/snapshots/{snap}`.
   string snapshot = 1 [
     (google.api.field_behavior) = REQUIRED,
+    (google.api.field_behavior) = IDENTIFIER,
     (google.api.resource_reference) = { type: "pubsub.googleapis.com/Snapshot" }
   ];
 }
 
 // Request for the `ListSnapshots` method.
 message ListSnapshotsRequest {
-  // Required. The name of the project in which to list snapshots.
+  // Required. Identifier. The name of the project in which to list snapshots.
   // Format is `projects/{project-id}`.
   string project = 1 [
     (google.api.field_behavior) = REQUIRED,
+    (google.api.field_behavior) = IDENTIFIER,
     (google.api.resource_reference) = {
       type: "cloudresourcemanager.googleapis.com/Project"
     }
@@ -2397,10 +2413,11 @@ message ListSnapshotsResponse {
 
 // Request for the `DeleteSnapshot` method.
 message DeleteSnapshotRequest {
-  // Required. The name of the snapshot to delete.
+  // Required. Identifier. The name of the snapshot to delete.
   // Format is `projects/{project}/snapshots/{snap}`.
   string snapshot = 1 [
     (google.api.field_behavior) = REQUIRED,
+    (google.api.field_behavior) = IDENTIFIER,
     (google.api.resource_reference) = { type: "pubsub.googleapis.com/Snapshot" }
   ];
 }

From 66b91f5cc7f7a25cf88093565068f0eff7ad46f9 Mon Sep 17 00:00:00 2001
From: cloud-java-bot <cloud-java-bot@google.com>
Date: Tue, 9 Dec 2025 02:37:00 +0000
Subject: [PATCH 4/5] chore: Update generation configuration at Tue Dec  9
 02:36:52 UTC 2025

---
 generation_config.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/generation_config.yaml b/generation_config.yaml
index 85f197aaf..0e8d66eea 100644
--- a/generation_config.yaml
+++ b/generation_config.yaml
@@ -1,5 +1,5 @@
 gapic_generator_version: 2.64.1
-googleapis_commitish: d534d01c1eefcc9efc7b9182a2b98e9fe5b0922b
+googleapis_commitish: c9578f6385fe0fb9067c5dba8d7cdda39efac0ff
 libraries_bom_version: 26.72.0
 libraries:
   - api_shortname: pubsub

From edfb452107ed1144e3b29ea8b8a12461d72eb7a3 Mon Sep 17 00:00:00 2001
From: cloud-java-bot <cloud-java-bot@google.com>
Date: Wed, 10 Dec 2025 02:37:44 +0000
Subject: [PATCH 5/5] chore: Update generation configuration at Wed Dec 10
 02:37:35 UTC 2025

---
 generation_config.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/generation_config.yaml b/generation_config.yaml
index 0e8d66eea..b834e739c 100644
--- a/generation_config.yaml
+++ b/generation_config.yaml
@@ -1,5 +1,5 @@
 gapic_generator_version: 2.64.1
-googleapis_commitish: c9578f6385fe0fb9067c5dba8d7cdda39efac0ff
+googleapis_commitish: 8c06c1e04ae562f49f411357577c700e9142f33c
 libraries_bom_version: 26.72.0
 libraries:
   - api_shortname: pubsub