Flutter - Alert Dialog

Future<void> _neverSatisfied() async {
                      return showDialog<void>(
                        context: context,
                        barrierDismissible: false, // tap on button!
                        builder: (BuildContext context) {
                          return AlertDialog(
                            title: Text('Rewind and remember'),
                            content: SingleChildScrollView(
                              child: ListBody(
                                children: <Widget>[
                                  Text('Flutter Title.'),
                                  Text('Flutter Message for the Dialog.'),
                                ],
                              ),
                            ),
                            actions: <Widget>[
                              FlatButton(
                                child: Text('Regret'),
                                onPressed: () {
                                  Navigator.of(context).pop();
                                },
                              ),
                            ],
                          );
                        },
                      );
                    }


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