如何在Flutter Desktop中像Java Robot那样进行按键？

dependencies:
  flutter_keyboard_actions: ^0.1.2

import 'package:flutter_keyboard_actions/flutter_keyboard_actions.dart';

final keyboardActionsConfig = KeyboardActionsConfig(
  actions: [
    KeyboardAction(
      focusNode: _textFieldFocusNode,
      toolbarButtons: [
        (node) {
          return GestureDetector(
            onTap: () {
              // 在这里执行按键操作
              // 例如，发送按键事件到操作系统
              // 使用flutter_keyboard_actions插件提供的方法
              KeyboardActions.sendKeyDownEvent(KeyCode.KEY_A);
              KeyboardActions.sendKeyUpEvent(KeyCode.KEY_A);
            },
            child: const Text('按键操作'),
          );
        },
      ],
    ),
  ],
);

@override
Widget build(BuildContext context) {
  return KeyboardActionsWidget(
    config: keyboardActionsConfig,
    child: Scaffold(
      // 页面布局
    ),
  );
}