public function getByMessage($message_id, array $params = [])
    {
        $message_id = (int) $message_id;
        if ($message_id <= 0) {
            throw new Exception('Invalid param message_id');
        }
        $validate = ['page', 'pagesize'];
        foreach ($params as $name=>$value) {
            if (!in_array(strtolower($name), $validate)) {
                unset($params[$name]);
            }
        }
        return $this->rest->get("messages/$message_id/replies", $params);
    }