protected function getDataAsTransformedArray($page_id = null, $page_id_key = null)
    {
        $data = $this->getData()->get();
        if (!is_null($page_id)) {
            $data = is_null($page_id_key) ? array($data[$page_id]) : array($page_id_key => $data[$page_id]);
        }
        foreach ($data as &$page) {
            foreach ($page as &$row) {
                foreach ($row as &$cell) {
                    $this->dataTransform($cell);
                }
            }
        }

        return $data;
    }