protected function displayRow($row, $next_row, $count)
    {
        $this->displayRowGroupHeaders($row, $next_row, $count);
        $this->displayRowColumns($row, $next_row, $count);
        $this->displayRowSpanningColumns($row, $next_row, $count);
        $this->displayRowMessages($row);
        $this->displayRowGroupFooters($row, $next_row, $count);
    }