TextParentData constructor Null safety

1. Flutter
2. rendering
3. TextParentData
4. TextParentData constructor

TextParentData class

1. Constructors
2. TextParentData
3. Properties
4. hashCode
5. nextSibling
6. offset
7. previousSibling
8. runtimeType
9. scale
10. Methods
11. detach
12. noSuchMethod
13. toString
14. Operators
15. operator ==