private com.google.protobuf.RepeatedFieldBuilderV3<
            com.google.cloud.videointelligence.v1.LabelAnnotation,
            com.google.cloud.videointelligence.v1.LabelAnnotation.Builder,
            com.google.cloud.videointelligence.v1.LabelAnnotationOrBuilder>
        getFrameLabelAnnotationsFieldBuilder() {
      if (frameLabelAnnotationsBuilder_ == null) {
        frameLabelAnnotationsBuilder_ =
            new com.google.protobuf.RepeatedFieldBuilderV3<
                com.google.cloud.videointelligence.v1.LabelAnnotation,
                com.google.cloud.videointelligence.v1.LabelAnnotation.Builder,
                com.google.cloud.videointelligence.v1.LabelAnnotationOrBuilder>(
                frameLabelAnnotations_,
                ((bitField0_ & 0x00000040) != 0),
                getParentForChildren(),
                isClean());
        frameLabelAnnotations_ = null;
      }
      return frameLabelAnnotationsBuilder_;
    }
<pre>
Label annotations on frame level.
There is exactly one element for each unique label.
</pre>

<code>
repeated .google.cloud.videointelligence.v1.LabelAnnotation frame_label_annotations = 4;
</code>
java-video-intelligence/proto-google-cloud-video-intelligence-v1/src/main/java/com/google/cloud/videointelligence/v1/VideoAnnotationResults.java