/**
  * last news (ordered by creation time) related to the politician
  *
  * @return date(d/m/Y h:m)
  * @author Guglielmo Celata
  **/
 public function getLastNews(BaseObject $object)
 {
     $c = new Criteria();
     $c->add(NewsPeer::RELATED_MONITORABLE_MODEL, get_class($object));
     $c->add(NewsPeer::RELATED_MONITORABLE_ID, $this->getReferenceKey($object));
     $c->addDescendingOrderByColumn(NewsPeer::CREATED_AT);
     return NewsPeer::doSelectOne($c);
 }