/**
  * Remove Pic from Event
  */
 public function removePicFromEvent(Event $event)
 {
     $pic = $event->getPic();
     $picPath = $pic->getPath();
     $event->removePic();
     $this->dm->persist($event);
     $this->dm->flush();
     if ($this->forceDeleteOnDisk && $picPath) {
         $this->deleteFileOnDisk($picPath, $event);
     }
     return $event;
 }