Flutter onClosing callback for showModalBottomSheet

Question

I have a showModalBottomSheet like the below, which I understand to inherit from BottomSheet (right?)

      showModalBottomSheet

        

Answer 1

showBottomSheet does not return a future, now it returns a PersistentBottomSheetController

  var _scaffoldKey = GlobalKey();
  PersistentBottomSheetController persistentBottomSheetController;

 persistentBottomSheetController = _scaffoldKey.currentState.showBottomSheet(
    (context)=>Container(

    )
 );

 persistentBottomSheetController.closed.then(_closeModal);

  void _closeModal(void value) {
    print('modal closed');
  }