` late final Html htmlWidget; final String htmlData = 'html data'; //dispose is especially important when using or in your HTML code @override void dispose() { htmlWidget.dispose(); super.dispose(); } @override Widget build(BuildContext context) { return new Scaffold( appBar: AppBar( title: Text('flutter_html Usage'), centerTitle: true, ), body: SingleChildScrollView( child: htmlWidget = Html( data: htmlData, //required //other parameters here ), ), ); }` 这个是按照您给的列子, 我这里报错 The method 'dispose' isn't defined for the type 'Html'. (Documentation)Try correcting the name to the name of an existing method, or definingsmethod named 'dispose'. 请您尽快回复。