docs: function setExtraLocale(extraLocale) {
        this.extraLocale = extraLocale;
        var invertedExtraObject = tia.cU.invertMapObj(extraLocale);
  
        this.invertedExtraLocaleFirstKey = invertedExtraObject.invertedMapFirstKey;
        this.invertedExtraLocaleAllKeys = invertedExtraObject.invertedMapAllKeys;
        return true;
      }