public static Builder newBuilder() {
    return DEFAULT_INSTANCE.toBuilder();
  }
<pre>
A list of supported language responses. This list contains an entry
for each language the Translation API supports.
</pre>

<code>repeated .google.cloud.translation.v3.SupportedLanguage languages = 1;</code>
java-translate/proto-google-cloud-translate-v3/src/main/java/com/google/cloud/translate/v3/SupportedLanguages.java