public function other_cols($column, $row) {
        if (preg_match('/^val(\d+)$/', $column, $matches)) {
            $items = $this->feedbackstructure->get_items();
            $itemobj = feedback_get_item_class($items[$matches[1]]->typ);
            return trim($itemobj->get_printval($items[$matches[1]], (object) ['value' => $row->$column] ));
        }
        return $row->$column;
    }