Noherczeg\Breadcrumb\Builders\Builder::casing PHP Метод

    public function casing($string, $to = '')
    {
        $res = null;
        // Pick one! :)
        switch ($to) {
            case 'lower':
                $res = mb_strtolower($string);
                break;
            case 'upper':
                $res = mb_strtoupper($string);
                break;
            case 'title':
                $res = ucfirst(strtolower($string));
                break;
            default:
                $res = $string;
                break;
        }
        return $res;
    }