private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.video.transcoder.v1.PreprocessingConfig,
            com.google.cloud.video.transcoder.v1.PreprocessingConfig.Builder,
            com.google.cloud.video.transcoder.v1.PreprocessingConfigOrBuilder>
        getPreprocessingConfigFieldBuilder() {
      if (preprocessingConfigBuilder_ == null) {
        preprocessingConfigBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.video.transcoder.v1.PreprocessingConfig,
                com.google.cloud.video.transcoder.v1.PreprocessingConfig.Builder,
                com.google.cloud.video.transcoder.v1.PreprocessingConfigOrBuilder>(
                getPreprocessingConfig(), getParentForChildren(), isClean());
        preprocessingConfig_ = null;
      }
      return preprocessingConfigBuilder_;
    }
<pre>
Preprocessing configurations.
</pre>

<code>.google.cloud.video.transcoder.v1.PreprocessingConfig preprocessing_config = 3;</code>
java-video-transcoder/proto-google-cloud-video-transcoder-v1/src/main/java/com/google/cloud/video/transcoder/v1/Input.java