/**
  * Creates a form to delete a Usuario entity.
  *
  * @param Usuario $usuario The Usuario entity
  *
  * @return \Symfony\Component\Form\Form The form
  */
 private function createDeleteForm(Usuario $usuario)
 {
     return $this->createFormBuilder()->setAction($this->generateUrl('user_delete', array('id' => $usuario->getId())))->setMethod('DELETE')->getForm();
 }