onPressed: () { showModalBottomSheet( context: context, builder: (BuildContext context) { return new Container( height: 300.0, child: Text('123'), ); }, ).then((val) { print(val); }); },
onPressed: () { showModalBottomSheet( context: context, builder: (BuildContext context) { return new Container( height: 300.0, child: Text('123'), ); }, ).then((val) { print(val); }); },