Options constructor Null safety

1. spine_client
2. options.pb
3. Options
4. Options constructor

Options class

1. Constructors
2. Options
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. noSuchMethod
8. toString
9. Operators
10. operator ==
11. Static properties
12. beta
13. betaAll
14. betaType
15. column
16. constraintFor
17. defaultMessage
18. distinct
19. entity
20. everyIs
21. experimental
22. experimentalAll
23. experimentalType
24. goes
25. ifInvalid
26. ifMissing
27. internal
28. internalAll
29. internalType
30. is_73915
31. isRequired
32. max
33. min
34. pattern
35. range
36. required
37. requiredField
38. setOnce
39. sPIAll
40. sPIService
41. sPIType
42. typeUrlPrefix
43. validate
44. Static methods
45. registerAllExtensions