public function suffix($string)
    {
        if (null === $this->suffix) {
            $this->suffix = $this->element('', [], ' ');
        }

        $args = func_get_args();

        if (!is_array($string) && count($args) > 1) {
            $string = call_user_func_array([$this, 'format'], $args);
        }

        $this->suffix->append($string);

        return $this;
    }