Status_Status constructor Null safety

1. spine_client
2. response.pb
3. Status_Status
4. Status_Status const constructor

Status_Status enum

1. Constructors
2. Status_Status
3. Values
4. ok
5. error
6. rejection
7. notSet
8. Properties
9. hashCode
10. index
11. runtimeType
12. Methods
13. noSuchMethod
14. toString
15. Operators
16. operator ==
17. Constants
18. values