ScrollableState constructor Null safety

1. Flutter
2. widgets
3. ScrollableState
4. ScrollableState constructor

ScrollableState class

1. Constructors
2. ScrollableState
3. Properties
4. axisDirection
5. bucket
6. context
7. hashCode
8. mounted
9. notificationContext
10. position
11. restorationId
12. restorePending
13. runtimeType
14. storageContext
15. vsync
16. widget
17. Methods
18. activate
19. build
20. createTicker
21. deactivate
22. debugFillProperties
23. didChangeDependencies
24. didToggleBucket
25. didUpdateRestorationId
26. didUpdateWidget
27. dispose
28. initState
29. noSuchMethod
30. reassemble
31. registerForRestoration
32. restoreState
33. saveOffset
34. setCanDrag
35. setIgnorePointer
36. setSemanticsActions
37. setState
38. toDiagnosticsNode
39. toString
40. toStringShort
41. unregisterFromRestoration
42. Operators
43. operator ==