@java.lang.Override
  public Builder newBuilderForType() {
    return newBuilder();
  }
<pre>
Optional. Etag of the subscription.

If present, it must match with the server's etag. Otherwise, request
fails with the status `ABORTED`.
</pre>

<code>string etag = 4 [(.google.api.field_behavior) = OPTIONAL];</code>

@return The bytes for etag.
java-workspaceevents/proto-google-cloud-workspaceevents-v1/src/main/java/com/google/apps/events/subscriptions/v1/DeleteSubscriptionRequest.java