child property Null safety

1. Flutter
2. widgets
3. TextSelectionGestureDetector
4. child property

TextSelectionGestureDetector class

1. Constructors
2. TextSelectionGestureDetector
3. Properties
4. behavior
5. child
6. hashCode
7. key
8. onDoubleTapDown
9. onDragSelectionEnd
10. onDragSelectionStart
11. onDragSelectionUpdate
12. onForcePressEnd
13. onForcePressStart
14. onSecondaryTap
15. onSecondaryTapDown
16. onSingleLongTapEnd
17. onSingleLongTapMoveUpdate
18. onSingleLongTapStart
19. onSingleTapCancel
20. onSingleTapUp
21. onTapDown
22. runtimeType
23. Methods
24. createElement
25. createState
26. debugDescribeChildren
27. debugFillProperties
28. noSuchMethod
29. toDiagnosticsNode
30. toString
31. toStringDeep
32. toStringShallow
33. toStringShort
34. Operators
35. operator ==