private com.google.protobuf.RepeatedFieldBuilderV3<
            com.google.cloud.videointelligence.v1p3beta1.FaceDetectionAnnotation,
            com.google.cloud.videointelligence.v1p3beta1.FaceDetectionAnnotation.Builder,
            com.google.cloud.videointelligence.v1p3beta1.FaceDetectionAnnotationOrBuilder>
        getFaceDetectionAnnotationsFieldBuilder() {
      if (faceDetectionAnnotationsBuilder_ == null) {
        faceDetectionAnnotationsBuilder_ =
            new com.google.protobuf.RepeatedFieldBuilderV3<
                com.google.cloud.videointelligence.v1p3beta1.FaceDetectionAnnotation,
                com.google.cloud.videointelligence.v1p3beta1.FaceDetectionAnnotation.Builder,
                com.google.cloud.videointelligence.v1p3beta1.FaceDetectionAnnotationOrBuilder>(
                faceDetectionAnnotations_,
                ((bitField0_ & 0x00000080) != 0),
                getParentForChildren(),
                isClean());
        faceDetectionAnnotations_ = null;
      }
      return faceDetectionAnnotationsBuilder_;
    }
<pre>
Face detection annotations.
</pre>

<code>
repeated .google.cloud.videointelligence.v1p3beta1.FaceDetectionAnnotation face_detection_annotations = 13;
</code>
java-video-intelligence/proto-google-cloud-video-intelligence-v1p3beta1/src/main/java/com/google/cloud/videointelligence/v1p3beta1/VideoAnnotationResults.java