private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.video.stitcher.v1.ResponseMetadata,
            com.google.cloud.video.stitcher.v1.ResponseMetadata.Builder,
            com.google.cloud.video.stitcher.v1.ResponseMetadataOrBuilder>
        getResponseMetadataFieldBuilder() {
      if (responseMetadataBuilder_ == null) {
        responseMetadataBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.video.stitcher.v1.ResponseMetadata,
                com.google.cloud.video.stitcher.v1.ResponseMetadata.Builder,
                com.google.cloud.video.stitcher.v1.ResponseMetadataOrBuilder>(
                getResponseMetadata(), getParentForChildren(), isClean());
        responseMetadata_ = null;
      }
      return responseMetadataBuilder_;
    }
<pre>
The response metadata received from the ad request.
</pre>

<code>.google.cloud.video.stitcher.v1.ResponseMetadata response_metadata = 3;</code>
java-video-stitcher/proto-google-cloud-video-stitcher-v1/src/main/java/com/google/cloud/video/stitcher/v1/AdRequest.java