PointerEventResampler constructor Null safety

1. Flutter
2. gestures
3. PointerEventResampler
4. PointerEventResampler constructor

PointerEventResampler class

1. Constructors
2. PointerEventResampler
3. Properties
4. hashCode
5. hasPendingEvents
6. isDown
7. isTracked
8. runtimeType
9. Methods
10. addEvent
11. noSuchMethod
12. sample
13. stop
14. toString
15. Operators
16. operator ==