anchor.diff:                    ..minFlingVelocity = _physics?.minFlingVelocity
                     ..maxFlingVelocity = _physics?.maxFlingVelocity
                     ..velocityTrackerBuilder = _configuration.velocityTrackerBuilder(context)
  -                  ..dragStartBehavior = widget.dragStartBehavior
  -                  ..gestureSettings = _mediaQueryData?.gestureSettings;
  +                  ..dragStartBehavior = widget.dragStartBehavior;
                 },
               ),
             };
  
positive.code:   late ScrollBehavior _configuration;
    ScrollPhysics? _physics;
    ScrollController? _fallbackScrollController;
    MediaQueryData? _mediaQueryData;
  
    ScrollController get _effectiveScrollController => widget.controller ?? _fallbackScrollController!;
  
  
negative.code: import 'focus_manager.dart';
  import 'framework.dart';
  import 'gesture_detector.dart';
  import 'notification_listener.dart';
  import 'primary_scroll_controller.dart';
  import 'restoration.dart';
  