private void ensureNormalizedBoundingBoxesIsMutable() {
      if (!((bitField0_ & 0x00000001) != 0)) {
        normalizedBoundingBoxes_ =
            new java.util.ArrayList<com.google.cloud.videointelligence.v1.NormalizedBoundingBox>(
                normalizedBoundingBoxes_);
        bitField0_ |= 0x00000001;
      }
    }
<pre>
Deprecated. No effect.
</pre>

Protobuf type {@code google.cloud.videointelligence.v1.FaceFrame}
java-video-intelligence/proto-google-cloud-video-intelligence-v1/src/main/java/com/google/cloud/videointelligence/v1/FaceFrame.java