public function getJsLink($lang = null, $callback = false, $onLoadClass = 'onloadCallBack')
    {
        $client_api = static::CLIENT_API;
        $params = [];

        $callback ? $this->setCallBackParams($params, $onLoadClass)  : false;
        $lang ? $params['hl'] = $lang : null;

        return $client_api . '?'. http_build_query($params);
    }