protected function displayGroupHeader($row)
    {
        $tr_tag = new SwatHtmlTag('tr');
        $tr_tag->class = 'swat-table-view-group';
        $tr_tag->open();

        $td_tag = new SwatHtmlTag('td', $this->getTdAttributes());
        $td_tag->colspan = $this->view->getXhtmlColspan();
        $td_tag->open();
        $this->displayRenderersInternal($row);
        $td_tag->close();

        $tr_tag->close();
    }