Passar atributos para Controller no JavaFX

Passar atributos entre telas no JavaFX

try {
                FXMLLoader loader = new FXMLLoader(getClass().getResource("/com/raysystem/guimetricasscrum/GUIGraficoBarraHorasDiaFXML.fxml"));
                Parent root = (Parent)loader.load();
                GUIGraficoBarraHorasDiaFXMLController contr = (GUIGraficoBarraHorasDiaFXMLController)loader.getController();
                contr.setNome("Oi Mundo....");
                painelHorizontal.getChildren().add(root);
               
            } catch (IOException ex) {
                ex.printStackTrace();
            }