AlertDialog 안에서 setstate

https://morioh.com/a/c441b98c71ca/flutter-setstate-alertdialog
https://changjoopark.medium.com/flutter-dialog-%EC%95%88%EC%97%90%EC%84%9C-%EC%B2%B4%ED%81%AC%EB%B0%95%EC%8A%A4%EB%A5%BC-%EC%82%AC%EC%9A%A9%ED%95%98%EB%A0%A4%EB%A9%B4-d14258165d58

showDialog(
    context:context,
    builder:(context){
      return AlertDialog(
          content: StatefulBuilder(
          builder:(BuildContext context, StateSetter setState){
              return Container(
               
              );
          }),  
      );
    }
);