protected function mapEntityList(array $list, $rowElementName = null)
    {
        if (is_null($rowElementName)) {
            $rowElementName = 'row';
        }
        $xml = '';
        $no = 1;
        foreach ($list as $element) {
            $xml .= '<' . $rowElementName . ' no="' . $no++ . '">';
            $xml .= $this->mapSingleEntity($element);
            $xml .= "</$rowElementName>";
        }

        return $xml;
    }