State<T extends StatefulWidget> constructor Null safety

1. Flutter
2. widgets
3. State<T extends StatefulWidget>
4. State constructor

State class

1. Constructors
2. State
3. Properties
4. context
5. hashCode
6. mounted
7. runtimeType
8. widget
9. Methods
10. activate
11. build
12. deactivate
13. debugFillProperties
14. didChangeDependencies
15. didUpdateWidget
16. dispose
17. initState
18. noSuchMethod
19. reassemble
20. setState
21. toDiagnosticsNode
22. toString
23. toStringShort
24. Operators
25. operator ==