public function getRteTransformMode($fieldKey, $type = "tt_content")
    {
        $storage = $this->storageRepository->load();
        $transformMode = "";
        $matches = array();
        if ($storage[$type]["tca"][$fieldKey]["defaultExtras"] != "") {
            $re = "/(rte_transform\\[([a-z=_]+)\\])/";
            preg_match($re, $storage[$type]["tca"][$fieldKey]["defaultExtras"], $matches);
            $transformMode = end($matches);
        }
        return $transformMode;
    }