private void ensureLanguageCodesIsMutable() {
        if (!languageCodes_.isModifiable()) {
          languageCodes_ = new com.google.protobuf.LazyStringArrayList(languageCodes_);
        }
        bitField0_ |= 0x00000001;
      }
<pre>
Used with equivalent term set glossaries.
</pre>

Protobuf type {@code google.cloud.translation.v3beta1.Glossary.LanguageCodesSet}
java-translate/proto-google-cloud-translate-v3beta1/src/main/java/com/google/cloud/translate/v3beta1/Glossary.java