kind property Null safety

1. Flutter
2. vm_service
3. Instance
4. kind property

Instance class

1. Constructors
2. Instance
3. Properties
4. allocationLocation
5. associations
6. bound
7. bytes
8. classRef
9. closureContext
10. closureFunction
11. count
12. debugName
13. elements
14. fields
15. fixedId
16. hashCode
17. id
18. identityHashCode
19. isCaseSensitive
20. isMultiLine
21. json
22. kind
23. length
24. mirrorReferent
25. name
26. offset
27. parameterIndex
28. parameterizedClass
29. parameters
30. pattern
31. portId
32. propertyKey
33. propertyValue
34. returnType
35. runtimeType
36. size
37. targetType
38. type
39. typeArguments
40. typeClass
41. typeParameters
42. valueAsString
43. valueAsStringIsTruncated
44. Methods
45. noSuchMethod
46. toJson
47. toString
48. Operators
49. operator ==
50. Static methods
51. parse