TimeOfDayFormat constructor Null safety

1. Flutter
2. material
3. TimeOfDayFormat
4. TimeOfDayFormat const constructor

TimeOfDayFormat enum

1. Constructors
2. TimeOfDayFormat
3. Values
4. HH_colon_mm
5. HH_dot_mm
6. frenchCanadian
7. H_colon_mm
8. h_colon_mm_space_a
9. a_space_h_colon_mm
10. Properties
11. hashCode
12. index
13. runtimeType
14. Methods
15. noSuchMethod
16. toString
17. Operators
18. operator ==
19. Constants
20. values