DateMask constructor Null safety

1. baguette
2. DateMask
3. DateMask
4. DateMask constructor

DateMask class

1. Constructors
2. DateMask
3. Properties
4. afterChange
5. beforeChange
6. cursorBehavior
7. hashCode
8. hasListeners
9. mask
10. runtimeType
11. selection
12. text
13. translator
14. unmasked
15. value
16. Methods
17. addListener
18. buildTextSpan
19. clear
20. clearComposing
21. dispose
22. getText
23. isSelectionWithinTextBounds
24. moveCursorToEnd
25. noSuchMethod
26. notifyListeners
27. removeListener
28. setText
29. toString
30. unmask
31. updateMask
32. updateText
33. Operators
34. operator ==