private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.translate.v3beta1.Glossary.LanguageCodesSet,
            com.google.cloud.translate.v3beta1.Glossary.LanguageCodesSet.Builder,
            com.google.cloud.translate.v3beta1.Glossary.LanguageCodesSetOrBuilder>
        getLanguageCodesSetFieldBuilder() {
      if (languageCodesSetBuilder_ == null) {
        if (!(languagesCase_ == 4)) {
          languages_ =
              com.google.cloud.translate.v3beta1.Glossary.LanguageCodesSet.getDefaultInstance();
        }
        languageCodesSetBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.translate.v3beta1.Glossary.LanguageCodesSet,
                com.google.cloud.translate.v3beta1.Glossary.LanguageCodesSet.Builder,
                com.google.cloud.translate.v3beta1.Glossary.LanguageCodesSetOrBuilder>(
                (com.google.cloud.translate.v3beta1.Glossary.LanguageCodesSet) languages_,
                getParentForChildren(),
                isClean());
        languages_ = null;
      }
      languagesCase_ = 4;
      onChanged();
      return languageCodesSetBuilder_;
    }
<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