private function setLayout()
    {
        $this->layout = Html::tag('div', "{items}", ['class' => 'table-responsive']) .
            Html::tag(
                'div',
                Html::tag('div', "{summary}", ['class' => 'pagination-summary']) .
                Html::tag('div', "{pager}", ['class' => 'pagination-wrap']),
                ['class' => 'pagination-box']
            );
    }