how to change statelessWidget int o stateful code example
Example: flutter stateful widget
class YellowBird extends StatefulWidget {
const YellowBird({ Key key }) : super(key: key);
_YellowBirdState createState() => _YellowBirdState();
}
class _YellowBirdState extends State<YellowBird> {
Widget build(BuildContext context) {
return Container(color: const Color(0xFFFFE306));
}
}