public function getColumnOrders()
    {
        $columns = Bootstrap::getConfigVar('grid-editor.columns');
        $values  = array();

        for ($i = 0; $i <= $columns; $i++) {
            $values['push'][] = 'push-' . $i;
            $values['pull'][] = 'pull-' . $i;
        }

        return $values;
    }