Как создать приложение javafx 2.0 MDI

Как реализовать что-то вроде внутреннего фрейма в JavaFx 2.0?

Моя попытка такая..

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

public class Main extends Application {

    ConnectDb connection;

    public static void main(String[] args) {
        Application.launch(args);
    }

    @Override
    public void start(Stage stage) throws Exception {
        final Stage stage1 = new Stage();
        StackPane pane = new StackPane();
        Button btn = new Button("Click Me");
        btn.setOnAction(new EventHandler<ActionEvent>() {
            @Override
            public void handle(ActionEvent event) {
                connection = new ConnectDb();
                try {
                    connection.start(stage1);
                } catch (Exception e) {
                    e.printStackTrace(); 
                }
                System.out.println("Fire some thing..");
            }
        });
        pane.getChildren().add(btn);
        stage.setScene(new Scene(pane ,200, 300));
        stage.show();
    }
}

ConnectDb.java

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

public class ConnectDb extends Application {

    @Override
    public void start(Stage stage) throws Exception {
        StackPane pane = new StackPane();
        Button btn = new Button("Click On Button which is me");
        btn.setOnAction(new EventHandler<ActionEvent>() {
            @Override
            public void handle(ActionEvent event) {
                System.out.println("Something here..");
            }
        });
        pane.getChildren().add(btn);
        stage.setScene(new Scene(pane ,200, 300));
        stage.show();
    }
}