public function onDocuments(CarewEvent $event)
{
$document = new Document();
$document->setLayout('index.atom.twig')->setPath('feed/atom.xml')->setFilePath('feed/atom');
$documents = $event->getSubject();
$documents[$document->getFilePath()] = $document;
$event->setSubject($documents);
$globals = $event['globals'];
$globals->documents = array_replace($globals->documents, $documents);
}