TestHarnessAuthMixin<T extends ApplicationChannel> constructor Null safety

1. conduit_test
2. conduit_test
3. TestHarnessAuthMixin<T extends ApplicationChannel>
4. TestHarnessAuthMixin constructor

TestHarnessAuthMixin class

1. Constructors
2. TestHarnessAuthMixin
3. Properties
4. agent
5. application
6. authServer
7. channel
8. hashCode
9. options
10. runtimeType
11. Methods
12. addClient
13. afterStart
14. beforeStart
15. install
16. loginUser
17. noSuchMethod
18. onSetUp
19. onTearDown
20. start
21. stop
22. toString
23. Operators
24. operator ==