如何在flutter桌面中自定义AppMenu(MenuBar)？

dependencies:
  flutter_window_manager: ^0.1.0

import 'package:flutter_window_manager/flutter_window_manager.dart';

void main() {
  WindowManager.init();
  runApp(MyApp());
}

import 'package:flutter_window_manager/flutter_window_manager.dart';

void setCustomMenu() {
  List<MenuItem> customMenu = [
    MenuItem(
      title: '菜单项1',
      onClicked: () {
        // 菜单项1的回调函数
      },
    ),
    MenuItem(
      title: '菜单项2',
      onClicked: () {
        // 菜单项2的回调函数
      },
    ),
    // 添加更多自定义菜单项...
  ];

  WindowManager.instance.setMenu(customMenu);
}

@override
void initState() {
  super.initState();
  setCustomMenu();
}