code: public void setAlert(final boolean ALERT) {
          if (null == alert) {
              _alert = ALERT;
              fireUpdateEvent(ALERT_EVENT);
          } else {
              alert.set(ALERT);
          }
      }
docs: Defines if the alert property should be set. This
  property can be used to visualize an alert situation
  in the skin.
  @param ALERT