public Builder setActiveZone(
        com.google.cloud.visionai.v1.NormalizedPolygon.Builder builderForValue) {
      if (activeZoneBuilder_ == null) {
        annotationPayload_ = builderForValue.build();
        onChanged();
      } else {
        activeZoneBuilder_.setMessage(builderForValue.build());
      }
      annotationPayloadCase_ = 5;
      return this;
    }
<pre>
Annotation for type ACTIVE_ZONE
</pre>

<code>.google.cloud.visionai.v1.NormalizedPolygon active_zone = 5;</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/StreamAnnotation.java