JavaFX - 如何创建水平工具栏，八个按钮由两个垂直分隔符分隔

import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Separator;
import javafx.scene.control.ToolBar;
import javafx.stage.Stage;


public class Main extends Application {
    public static void main(String[] args) {
        launch(args);
    }

    @Override
    public void start(Stage stage) {
        Scene scene = new Scene(new Group());
        stage.setTitle("Tooltip Sample");
        stage.setWidth(300);
        stage.setHeight(150);

        ToolBar toolBar = new ToolBar(
            new Button("New"),
            new Button("Open"),
            new Button("Save"),
            new Separator(),
            new Button("Clean"),
            new Button("Compile"),
            new Button("Run"),
            new Separator(),
            new Button("Debug"),
            new Button("Profile")
        );
        
        ((Group) scene.getRoot()).getChildren().add(toolBar);

        stage.setScene(scene);
        stage.show();
    }
}