public function updateDefaultByCode($code, $text)
    {
        list($namespace, $group, $item) = $this->parseCode($code);
        $locale                         = $this->defaultLocale;
        $translation                    = $this->model->whereLocale($locale)->whereNamespace($namespace)->whereGroup($group)->whereItem($item)->first();
        if (!$translation) {
            return $this->create(compact('locale', 'namespace', 'group', 'item', 'text'));
        }
        return $this->update($translation->id, $text);
    }