code: public void processEvent(EventObject event) {
      if (event instanceof RequestEvent) {
        processRequestEvent((RequestEvent) event);
      } else {
        LOG.error("invalid event type received: " + event.getClass().getName() + ": "
            + event.toString());
      }
    }
docs: /*
  @see org.cafesip.sipunit.RequestListener#processEvent(java.util.EventObject)