How To Use Flutter Raisedbutton Icon OnPressed

import 'package:flutter/material.dart';
void main() {
  runApp(const MyApp());
}
class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: Homepage(),
    );
  }
}
class Homepage extends StatefulWidget {
  @override
  State<Homepage> createState() => _HomepageState();
}
class _HomepageState extends State<Homepage> {
  @override
  Widget build(BuildContext context) {
    return SafeArea(
        child: Scaffold(
      body: Center(
          child: Padding(
              padding: EdgeInsets.symmetric(horizontal: 40),
              child: Column(
                mainAxisAlignment: MainAxisAlignment.center,
                children: [
                  RaisedButton.icon(
                    onPressed: () {
                      ScaffoldMessenger.of(context).showSnackBar(SnackBar(
                          content: Text('Raised Button Icon Clicked')));
                    },
                    icon: Icon(Icons.email),
                    label: Text('Icon'),
                  )
                ],
              ))),
    ));
  }
}