private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.videointelligence.v1p3beta1.FaceDetectionConfig,
            com.google.cloud.videointelligence.v1p3beta1.FaceDetectionConfig.Builder,
            com.google.cloud.videointelligence.v1p3beta1.FaceDetectionConfigOrBuilder>
        getFaceDetectionConfigFieldBuilder() {
      if (faceDetectionConfigBuilder_ == null) {
        faceDetectionConfigBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.videointelligence.v1p3beta1.FaceDetectionConfig,
                com.google.cloud.videointelligence.v1p3beta1.FaceDetectionConfig.Builder,
                com.google.cloud.videointelligence.v1p3beta1.FaceDetectionConfigOrBuilder>(
                getFaceDetectionConfig(), getParentForChildren(), isClean());
        faceDetectionConfig_ = null;
      }
      return faceDetectionConfigBuilder_;
    }
<pre>
Config for FACE_DETECTION.
</pre>

<code>
.google.cloud.videointelligence.v1p3beta1.FaceDetectionConfig face_detection_config = 5;
</code>
java-video-intelligence/proto-google-cloud-video-intelligence-v1p3beta1/src/main/java/com/google/cloud/videointelligence/v1p3beta1/VideoContext.java