private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.speech.v2.TranslationConfig,
            com.google.cloud.speech.v2.TranslationConfig.Builder,
            com.google.cloud.speech.v2.TranslationConfigOrBuilder>
        getTranslationConfigFieldBuilder() {
      if (translationConfigBuilder_ == null) {
        translationConfigBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.speech.v2.TranslationConfig,
                com.google.cloud.speech.v2.TranslationConfig.Builder,
                com.google.cloud.speech.v2.TranslationConfigOrBuilder>(
                getTranslationConfig(), getParentForChildren(), isClean());
        translationConfig_ = null;
      }
      return translationConfigBuilder_;
    }
<pre>
Optional. Optional configuration used to automatically run translation on
the given audio to the desired language for supported models.
</pre>

<code>
.google.cloud.speech.v2.TranslationConfig translation_config = 15 [(.google.api.field_behavior) = OPTIONAL];
</code>
java-speech/proto-google-cloud-speech-v2/src/main/java/com/google/cloud/speech/v2/RecognitionConfig.java