@java.lang.Override
  public boolean hasAppEngineHttpQueue() {
    return queueTypeCase_ == 3;
  }
<pre>
[AppEngineHttpQueue][google.cloud.tasks.v2beta3.AppEngineHttpQueue]
settings apply only to [App Engine
tasks][google.cloud.tasks.v2beta3.AppEngineHttpRequest] in this queue.
[Http tasks][google.cloud.tasks.v2beta3.HttpRequest] are not affected by
this proto.
</pre>

<code>.google.cloud.tasks.v2beta3.AppEngineHttpQueue app_engine_http_queue = 3;</code>

@return Whether the appEngineHttpQueue field is set.
java-tasks/proto-google-cloud-tasks-v2beta3/src/main/java/com/google/cloud/tasks/v2beta3/Queue.java