GestureLongPressMoveUpdateCallback typedef Null safety
Callback signature for LongPressGestureRecognizer.onLongPressMoveUpdate.
Called when a pointer is moving after being held in contact at the same location for a long period of time. Reports the new position and its offset from the original down position.
- GestureDetector.onLongPressMoveUpdate, which matches this signature.
typedef GestureLongPressMoveUpdateCallback = void Function(LongPressMoveUpdateDetails details);