private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.speech.v2.OutputFormatConfig,
            com.google.cloud.speech.v2.OutputFormatConfig.Builder,
            com.google.cloud.speech.v2.OutputFormatConfigOrBuilder>
        getOutputFormatConfigFieldBuilder() {
      if (outputFormatConfigBuilder_ == null) {
        outputFormatConfigBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.speech.v2.OutputFormatConfig,
                com.google.cloud.speech.v2.OutputFormatConfig.Builder,
                com.google.cloud.speech.v2.OutputFormatConfigOrBuilder>(
                getOutputFormatConfig(), getParentForChildren(), isClean());
        outputFormatConfig_ = null;
      }
      return outputFormatConfigBuilder_;
    }
<pre>
Optional. Configuration for the format of the results stored to `output`.
If unspecified transcripts will be written in the `NATIVE` format only.
</pre>

<code>
.google.cloud.speech.v2.OutputFormatConfig output_format_config = 3 [(.google.api.field_behavior) = OPTIONAL];
</code>
java-speech/proto-google-cloud-speech-v2/src/main/java/com/google/cloud/speech/v2/RecognitionOutputConfig.java