@java.lang.Override
  public com.google.protobuf.Timestamp getExpireTime() {
    if (expirationCase_ == 13) {
      return (com.google.protobuf.Timestamp) expiration_;
    }
    return com.google.protobuf.Timestamp.getDefaultInstance();
  }
<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 The expireTime.
java-workspaceevents/proto-google-cloud-workspaceevents-v1/src/main/java/com/google/apps/events/subscriptions/v1/Subscription.java