why this is not working in sliver app bar

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

void main() {
runApp(MaterialApp(
title: 'Androidmonks',
home: Scaffold(
body: CustomScrollView(
slivers: [
SliverAppBar(

backgroundColor: Colors.orangeAccent,
floating: true,
actions: [
_Home(),
],
),
],
),
)));
}

class _Home extends StatelessWidget {
@override
Widget build(BuildContext context) {
String htmlContent = """

Hello World!!


How are you today?


But why are you doing this?



Can you tell me?


Please visit Flutter docs





This text is slightly transparent, and has a slightly transparent background too.

""";

var myRichText =
HTML.toRichText(context, htmlContent, linksCallback: (link) {
print("You clicked on $link");
});

return Scaffold(
body: Container(padding: EdgeInsets.all(16.0), child: myRichText));
}
}