protected function withBulk(array $data = [])
    {
        if (!$this->isArray($data)) {
            return;
        }

        foreach ($data['data'] as $index => $element) {
            $row = $this->data->addChild('row');

            $row->addAttribute('no', ++$index);

            foreach ($element as $key => $value) {
                $child = $row->addChild('FL', $value);

                $child->addAttribute('val', $key);
            }
        }
    }