private function getTranslationKey($key = null)
    {
        $t = $this->translator;
        $key = $t->has('helper::'.$key) ? 'helper::'.$key : $key;
        return $key;
    }
private function getTranslationKey($key = null)
    {
        $t = $this->translator;
        $key = $t->has('helper::'.$key) ? 'helper::'.$key : $key;
        return $key;
    }
private function getTranslationKey ( $ key = null ) { $ t = $ this -> translator ; $ key = $ t -> has ( 'helper::' . $ key ) ? 'helper::' . $ key : $ key ; return $ key ; }
Format translation key - checks for package- and app-translations

@param  string $key
@return string
Format translation key - checks for package - and app - translations