public Builder mergeFaceDetectionConfig(
        com.google.cloud.videointelligence.v1.FaceDetectionConfig value) {
      if (faceDetectionConfigBuilder_ == null) {
        if (((bitField0_ & 0x00000010) != 0)
            && faceDetectionConfig_ != null
            && faceDetectionConfig_
                != com.google.cloud.videointelligence.v1.FaceDetectionConfig.getDefaultInstance()) {
          getFaceDetectionConfigBuilder().mergeFrom(value);
        } else {
          faceDetectionConfig_ = value;
        }
      } else {
        faceDetectionConfigBuilder_.mergeFrom(value);
      }
      if (faceDetectionConfig_ != null) {
        bitField0_ |= 0x00000010;
        onChanged();
      }
      return this;
    }
<pre>
Config for FACE_DETECTION.
</pre>

<code>.google.cloud.videointelligence.v1.FaceDetectionConfig face_detection_config = 5;
</code>
java-video-intelligence/proto-google-cloud-video-intelligence-v1/src/main/java/com/google/cloud/videointelligence/v1/VideoContext.java