@java.lang.Override
    public boolean hasControl() {
      return responseCase_ == 2;
    }
<pre>
A control message from the server.
</pre>

<code>.google.cloud.visionai.v1.ReceiveEventsControlResponse control = 2;</code>

@return Whether the control field is set.
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/ReceiveEventsResponse.java