@java.lang.Override
  public com.google.cloud.translate.v3.AdaptiveMtTranslateRequest.ReferenceSentenceConfigOrBuilder
      getReferenceSentenceConfigOrBuilder() {
    return referenceSentenceConfig_ == null
        ? com.google.cloud.translate.v3.AdaptiveMtTranslateRequest.ReferenceSentenceConfig
            .getDefaultInstance()
        : referenceSentenceConfig_;
  }
<pre>
Configuration for caller provided reference sentences.
</pre>

<code>
optional .google.cloud.translation.v3.AdaptiveMtTranslateRequest.ReferenceSentenceConfig reference_sentence_config = 6;
</code>
java-translate/proto-google-cloud-translate-v3/src/main/java/com/google/cloud/translate/v3/AdaptiveMtTranslateRequest.java