如何在flutter中创建自定义条子？

import 'package:flutter/material.dart';

class CustomAppBar extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return AppBar(
      title: Text('Custom AppBar'),
      // 自定义其他属性，如背景颜色、图标等
    );
  }
}

import 'package:flutter/material.dart';
import 'custom_appbar.dart';

class HomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: CustomAppBar(), // 使用自定义AppBar
      body: Container(
        // 页面内容
      ),
    );
  }
}