private function revertIndexColumn($mDataSupport)
    {
        if ($this->columnDef['index']) {
            $index = $mDataSupport ? config('datatables.index_column', 'DT_RowIndex') : 0;
            $start = (int) $this->request->input('start');
            $this->collection->transform(function ($data) use ($index, &$start) {
                $data[$index] = ++$start;

                return $data;
            });
        }
    }