BroadcastChannel class

1. Constructors
2. BroadcastChannel
3. Properties
4. name
5. onMessage
6. hashCode
7. on
8. runtimeType
9. Methods
10. close
11. postMessage
12. addEventListener
13. dispatchEvent
14. noSuchMethod
15. removeEventListener
16. toString
17. Operators
18. operator ==
19. Constants
20. messageEvent