DispatchOutcome_Result constructor Null safety

1. spine_client
2. dispatching.pb
3. DispatchOutcome_Result
4. DispatchOutcome_Result const constructor

DispatchOutcome_Result enum

1. Constructors
2. DispatchOutcome_Result
3. Values
4. success
5. error
6. interrupted
7. ignored
8. sentToInbox
9. publishedToRemote
10. noTargetsToRoute
11. notSet
12. Properties
13. hashCode
14. index
15. runtimeType
16. Methods
17. noSuchMethod
18. toString
19. Operators
20. operator ==
21. Constants
22. values