public function dumpArgs(Frame $frame)
    {
        // we support frame args only when the optional dumper is available
        if (!$this->getDumper()) {
            return '';
        }

        $html = '';
        $numFrames = count($frame->getArgs());

        if ($numFrames > 0) {
            $html = '<ol class="linenums">';
            foreach ($frame->getArgs() as $j => $frameArg) {
                $html .= '<li>'. $this->dump($frameArg) .'</li>';
            }
            $html .= '</ol>';
        }

        return $html;
    }