/** Initializes the controller class. */
 @Override
 public void initialize(URL url, ResourceBundle rb) {
   logger.entry();
   OkButton.disableProperty()
       .bind(
           Bindings.isEmpty(FederationExecutionName.textProperty())
               .or(Bindings.isEmpty(FederateType.textProperty())));
   logger.exit();
 }
 /** Initializes the controller class. */
 @Override
 public void initialize(URL url, ResourceBundle rb) {
   logger.entry();
   OkButton.disableProperty().bind(ObjectInstanceDesignator.textProperty().isEmpty());
   logger.exit();
 }