notificationContext property Null safety
override
The BuildContext that should be used when dispatching ScrollNotifications.
This context is typically different that the context of the scrollable widget itself. For example, Scrollable uses a context outside the Viewport but inside the widgets created by ScrollBehavior.buildOverscrollIndicator and ScrollBehavior.buildScrollbar.
Implementation
@override
BuildContext? get notificationContext => _gestureDetectorKey.currentContext;