type property Null safety

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

IsolateGroup class

1. Constructors
2. IsolateGroup
3. Properties
4. hashCode
5. id
6. isolates
7. isSystemIsolateGroup
8. json
9. name
10. number
11. runtimeType
12. type
13. Methods
14. noSuchMethod
15. toJson
16. toString
17. Operators
18. operator ==
19. Static methods
20. parse