NavigatorState constructor Null safety

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

NavigatorState class

1. Constructors
2. NavigatorState
3. Properties
4. bucket
5. context
6. focusScopeNode
7. hashCode
8. mounted
9. overlay
10. restorationId
11. restorePending
12. runtimeType
13. userGestureInProgress
14. userGestureInProgressNotifier
15. widget
16. Methods
17. activate
18. build
19. canPop
20. createTicker
21. deactivate
22. debugFillProperties
23. didChangeDependencies
24. didStartUserGesture
25. didStopUserGesture
26. didToggleBucket
27. didUpdateRestorationId
28. didUpdateWidget
29. dispose
30. finalizeRoute
31. initState
32. maybePop
33. noSuchMethod
34. pop
35. popAndPushNamed
36. popUntil
37. push
38. pushAndRemoveUntil
39. pushNamed
40. pushNamedAndRemoveUntil
41. pushReplacement
42. pushReplacementNamed
43. reassemble
44. registerForRestoration
45. removeRoute
46. removeRouteBelow
47. replace
48. replaceRouteBelow
49. restorablePopAndPushNamed
50. restorablePush
51. restorablePushAndRemoveUntil
52. restorablePushNamed
53. restorablePushNamedAndRemoveUntil
54. restorablePushReplacement
55. restorablePushReplacementNamed
56. restorableReplace
57. restorableReplaceRouteBelow
58. restoreState
59. setState
60. toDiagnosticsNode
61. toString
62. toStringShort
63. unregisterFromRestoration
64. Operators
65. operator ==