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import 'package:flutter/material.dart';
import 'package:url_launcher/url_launcher.dart';
final Uri _url = Uri.parse('https://flutter.dev');
void main() => runApp(
const MaterialApp(
home: Material(
child: Center(
child: ElevatedButton(
onPressed: _launchUrl,
child: Text('Show Flutter homepage'),
),
),
),
),
);
Future<void> _launchUrl() async {
if (!await launchUrl(_url)) {
throw 'Could not launch $_url';
}
}