protected function process_mod_grade_item(array $data, array $raw) {

        $stashname   = 'gradebook_modgradeitem_'.$data['itemmodule'];
        $stashitemid = $data['iteminstance'];
        $gradeitems  = $this->converter->get_stash_or_default($stashname, $stashitemid, array());

        // typically there will be single item with itemnumber 0
        $gradeitems[$data['itemnumber']] = $data;

        $this->converter->set_stash($stashname, $gradeitems, $stashitemid);

        return $data;
    }