@java.lang.Override
    public boolean hasAppEngineHttpTarget() {
      return targetTypeCase_ == 3;
    }
<pre>
App Engine HTTP target.

An App Engine queue is a queue that has an
[AppEngineHttpTarget][google.cloud.tasks.v2beta2.AppEngineHttpTarget].
</pre>

<code>.google.cloud.tasks.v2beta2.AppEngineHttpTarget app_engine_http_target = 3;</code>

@return Whether the appEngineHttpTarget field is set.
java-tasks/proto-google-cloud-tasks-v2beta2/src/main/java/com/google/cloud/tasks/v2beta2/Queue.java