@java.lang.Override
  public boolean hasExpireTime() {
    return expirationCase_ == 13;
  }
<pre>
Non-empty default. The timestamp in UTC when the subscription expires.
Always displayed on output, regardless of what was used on input.
</pre>

<code>
.google.protobuf.Timestamp expire_time = 13 [(.google.api.field_behavior) = NON_EMPTY_DEFAULT];
</code>

@return Whether the expireTime field is set.
java-workspaceevents/proto-google-cloud-workspaceevents-v1/src/main/java/com/google/apps/events/subscriptions/v1/Subscription.java