@java.lang.Override
  public boolean hasActiveZone() {
    return annotationPayloadCase_ == 5;
  }
<pre>
Annotation for type ACTIVE_ZONE
</pre>

<code>.google.cloud.visionai.v1.NormalizedPolygon active_zone = 5;</code>

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