continer widget in flutter code example

Example 1: flutter widget destructor

//In a state of a statefull widget
@override
void dispose() {
	_bloc.dispose();
	super.dispose();
}

Example 2: stateless widget flutter

class GreenFrog extends StatelessWidget {
  const GreenFrog({ Key key }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Container(color: const Color(0xFF2DBD3A));
  }
}