private void ensureAnnotationProgressIsMutable() {
      if (!((bitField0_ & 0x00000001) != 0)) {
        annotationProgress_ =
            new java.util.ArrayList<
                com.google.cloud.videointelligence.v1p1beta1.VideoAnnotationProgress>(
                annotationProgress_);
        bitField0_ |= 0x00000001;
      }
    }
<pre>
Video annotation progress. Included in the `metadata`
field of the `Operation` returned by the `GetOperation`
call of the `google::longrunning::Operations` service.
</pre>

Protobuf type {@code google.cloud.videointelligence.v1p1beta1.AnnotateVideoProgress}
java-video-intelligence/proto-google-cloud-video-intelligence-v1p1beta1/src/main/java/com/google/cloud/videointelligence/v1p1beta1/AnnotateVideoProgress.java