public function move_files($questionid, $oldcontextid, $newcontextid) {
        $fs = get_file_storage();
        $fs->move_area_files_to_new_context($oldcontextid,
                $newcontextid, 'question', 'questiontext', $questionid);
        $fs->move_area_files_to_new_context($oldcontextid,
                $newcontextid, 'question', 'generalfeedback', $questionid);
    }