+
+       /**
+        * {@inheritdoc}
+        */
+       public function preUpdate(\Doctrine\ORM\Event\PreUpdateEventArgs  $eventArgs) {
+               //Check that we have an snippet instance
+               if (($snippet = $eventArgs->getEntity()) instanceof Snippet) {
+                       //Set updated value
+                       $snippet->setUpdated(new \DateTime('now'));
+               }
+       }