public function delete()
 {
     try {
         Module::em()->remove($this);
         Module::em()->flush();
         return true;
     } catch (Exception $e) {
         return false;
     }
 }
 /**
  * Instanciar EntityManager
  *
  * @return Doctrine\ORM\EntityManager
  */
 public function em()
 {
     return Module::em();
 }