public function removeElement(Event $event)
{
$sitemap = new Sitemap();
$xml = $this->getXml($sitemap);
if ($xml !== null) {
$request = $this->serviceManager->get('Request');
$document = $event->getTarget();
$oldUrlKey = $document->getUrlKey();
$document->setUrlKey($document->getOrigData('url_key'));
$obj = $this->getDoc($xml, $request->getBasePath(), $document->getUrl());
if (!empty($obj)) {
unset($obj);
$xml->asXml($sitemap->getFilePath());
}
$document->setUrlKey($oldUrlKey);
}
}