/**
  * Called after logout
  * @return 
  * @param array $a_username
  * @param object $a_auth
  */
 protected function logoutObserver($a_username, $a_auth)
 {
     global $ilLog;
     $ilLog->write(__METHOD__ . ': Logout observer called');
     ilSessionControl::handleLogoutEvent();
     return $this->getContainer()->logoutObserver($a_username, $a_auth);
 }