can't compile, Method not found: 'canLaunchUrl'.

[gslovemy]

../../../../../.pub-cache/hosted/pub.flutter-io.cn/easy_rich_text-2.2.0/lib/src/easy_rich_text.dart:227:15: Error: Method not found: 'canLaunchUrl'.
if (await canLaunchUrl(url)) {
^^^^^^^^^^^^
../../../../../.pub-cache/hosted/pub.flutter-io.cn/easy_rich_text-2.2.0/lib/src/easy_rich_text.dart:228:13: Error: Method not found: 'launchUrl'.
await launchUrl(url);
^^^^^^^^^
Target kernel_snapshot failed: Exception

[2000calories]

Have you tried

flutter clean
flutter pub get