commaDistance property Null safety

1. jrpn
2. model
3. DisplayMode
4. commaDistance property

DisplayMode class

1. Properties
2. commaDistance
3. displayName
4. hashCode
5. isFloatMode
6. radix
7. rightJustify
8. runtimeType
9. Methods
10. addCommas
11. convertValuesTo
12. format
13. leastSignificantDigit
14. noSuchMethod
15. round
16. select
17. setComplexMode
18. signMode
19. toJson
20. toString
21. tryParse
22. Operators
23. operator ==
24. Static properties
25. bin
26. decimal
27. hex
28. oct
29. Static methods
30. eng
31. fix
32. float
33. fromJson
34. sci