public function setLanguage(CNabuLanguage $nb_language)
    {
        if ($nb_language->isValueNumeric(NABU_LANG_FIELD_ID) || $nb_language->isValueGUID(NABU_LANG_FIELD_ID)) {
            $nb_language_id = $nb_language->getValue(NABU_LANG_FIELD_ID);
            $this->languages_list->addItem($nb_language);
        }
    }