public function create(ViewEvent $event)
{
if (null === ($view = ViewQuery::create()->filterBySourceId($event->getSourceId())->findOneBySource($event->getSource()))) {
$view = new View();
}
if ($event->hasDefinedViews()) {
$view->setView($event->getViewName())->setSource($event->getSource())->setSourceId($event->getSourceId())->setSubtreeView($event->getSubtreeView())->setChildrenView($event->getChildrenView())->save();
} else {
$view->delete();
}
}