type property Null safety

1. Flutter
2. vm_service
3. NullValRef
4. type property

NullValRef class

1. Constructors
2. NullValRef
3. Properties
4. allocationLocation
5. classRef
6. closureContext
7. closureFunction
8. debugName
9. fixedId
10. hashCode
11. id
12. identityHashCode
13. json
14. kind
15. length
16. name
17. parameterizedClass
18. parameters
19. pattern
20. portId
21. returnType
22. runtimeType
23. type
24. typeClass
25. typeParameters
26. valueAsString
27. valueAsStringIsTruncated
28. Methods
29. noSuchMethod
30. toJson
31. toString
32. Operators
33. operator ==
34. Static methods
35. parse