docs: private String buildGoogMsgVarNameHelper(MsgNode msgNode) {
      // NOTE: MSG_UNNAMED/MSG_EXTERNAL are a special tokens recognized by the jscompiler. MSG_UNNAMED
      // disables the default logic that requires all messages to be uniquely named.
      // and MSG_EXTERNAL causes the jscompiler to not extract these messages.
      String desiredName =
          jsSrcOptions.googMsgsAreExternal()
              ? "MSG_EXTERNAL_" + MsgUtils.computeMsgIdForDualFormat(msgNode)
              : "MSG_UNNAMED";
      return translationContext.nameGenerator().generateName(desiredName);
    }