protected function fill(&$params)
    {
        if (is_null($this->model->new_value)) {
            return false;
        }
        foreach ($params as $index => $value) {
            if (isset($params[$index])) {
                continue;
            }
            $params[$index] = array_get($this->model->new_value, $index);
        }
        return $params;
    }