textSpan property Null safety

1. flutter_json_widgets
2. widget
3. RichSelectableText
4. textSpan property

RichSelectableText class

1. Constructors
2. RichSelectableText
3. fromJson
4. Properties
5. autofocus
6. copyWith
7. cursorColor
8. cursorHeight
9. cursorRadius
10. cursorWidth
11. dragStartBehavior
12. enableInteractiveSelection
13. hashCode
14. key
15. maxLines
16. minLines
17. onTap
18. runtimeType
19. scrollPhysics
20. selectionHeightStyle
21. selectionWidthStyle
22. semanticsLabel
23. showCursor
24. strutStyle
25. style
26. textAlign
27. textDirection
28. textHeightBehavior
29. textScaleFactor
30. textSpan
31. textWidthBasis
32. Methods
33. map
34. mapOrNull
35. maybeMap
36. maybeWhen
37. noSuchMethod
38. toJson
39. toString
40. when
41. whenOrNull
42. Operators
43. operator ==