public Builder mergeLanguageCodesSet(
        com.google.cloud.translate.v3beta1.Glossary.LanguageCodesSet value) {
      if (languageCodesSetBuilder_ == null) {
        if (languagesCase_ == 4
            && languages_
                != com.google.cloud.translate.v3beta1.Glossary.LanguageCodesSet
                    .getDefaultInstance()) {
          languages_ =
              com.google.cloud.translate.v3beta1.Glossary.LanguageCodesSet.newBuilder(
                      (com.google.cloud.translate.v3beta1.Glossary.LanguageCodesSet) languages_)
                  .mergeFrom(value)
                  .buildPartial();
        } else {
          languages_ = value;
        }
        onChanged();
      } else {
        if (languagesCase_ == 4) {
          languageCodesSetBuilder_.mergeFrom(value);
        } else {
          languageCodesSetBuilder_.setMessage(value);
        }
      }
      languagesCase_ = 4;
      return this;
    }
<pre>
Used with equivalent term set glossaries.
</pre>

<code>.google.cloud.translation.v3beta1.Glossary.LanguageCodesSet language_codes_set = 4;
</code>
java-translate/proto-google-cloud-translate-v3beta1/src/main/java/com/google/cloud/translate/v3beta1/Glossary.java