Enrichment_Mode constructor Null safety

1. spine_client
2. enrichment.pb
3. Enrichment_Mode
4. Enrichment_Mode const constructor

Enrichment_Mode enum

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