public Builder mergeReferenceSentenceConfig(
        com.google.cloud.translate.v3.AdaptiveMtTranslateRequest.ReferenceSentenceConfig value) {
      if (referenceSentenceConfigBuilder_ == null) {
        if (((bitField0_ & 0x00000008) != 0)
            && referenceSentenceConfig_ != null
            && referenceSentenceConfig_
                != com.google.cloud.translate.v3.AdaptiveMtTranslateRequest.ReferenceSentenceConfig
                    .getDefaultInstance()) {
          getReferenceSentenceConfigBuilder().mergeFrom(value);
        } else {
          referenceSentenceConfig_ = value;
        }
      } else {
        referenceSentenceConfigBuilder_.mergeFrom(value);
      }
      if (referenceSentenceConfig_ != null) {
        bitField0_ |= 0x00000008;
        onChanged();
      }
      return this;
    }
<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