protected function process_grading_instance($data) {
        global $DB;

        $data = (object)$data;

        // new form definition id
        $newformid = $this->get_new_parentid('grading_definition');

        // get the name of the area we are restoring to
        $sql = "SELECT ga.areaname
                  FROM {grading_definitions} gd
                  JOIN {grading_areas} ga ON gd.areaid = ga.id
                 WHERE gd.id = ?";
        $areaname = $DB->get_field_sql($sql, array($newformid), MUST_EXIST);

        // get the mapped itemid - the activity module is expected to define the mappings
        // for each gradable area
        $newitemid = $this->get_mappingid(restore_gradingform_plugin::itemid_mapping($areaname), $data->itemid);

        $oldid = $data->id;
        $data->definitionid = $newformid;
        $data->raterid = $this->get_mappingid('user', $data->raterid);
        $data->itemid = $newitemid;

        $newid = $DB->insert_record('grading_instances', $data);
        $this->set_mapping('grading_instance', $oldid, $newid);
    }