protected function _addUrlParameters($sUrl, $aParams)
    {
        $sDelimiter = ((getStr()->strpos($sUrl, '?') !== false)) ? '&' : '?';
        foreach ($aParams as $sName => $sVal) {
            $sUrl = $sUrl . $sDelimiter . $sName . '=' . $sVal;
            $sDelimiter = '&';
        }

        return $sUrl;
    }