public long getLastAccessedTime() {
   try {
     return session.getLastAccessedTime();
   } catch (IllegalStateException e) {
     throw new SessionExpiredException(e);
   }
 }
 /** @see javax.servlet.http.HttpSession#getLastAccessedTime() */
 @Override
 public long getLastAccessedTime() {
   return portletSession.getLastAccessedTime();
 }