如何使用flutter_html包根据html标签渲染自定义小工具？

dependencies:
  flutter_html: ^2.1.2

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

class MyHtmlWidget extends StatelessWidget {
  final String htmlContent;
  
  MyHtmlWidget({required this.htmlContent});
  
  @override
  Widget build(BuildContext context) {
    return HtmlWidget(
      htmlContent,
      customRender: {
        'customTag': (RenderContext context, Widget child, attributes, _) {
          // 自定义标签的渲染逻辑
          return Container(
            child: Text('Custom Widget'),
          );
        },
      },
    );
  }
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: Center(
          child: MyHtmlWidget(
            htmlContent: '<customTag></customTag>',
          ),
        ),
      ),
    );
  }
}