1. Dart
2. dart:html
3. ServiceWorkerContainer
4. messageEvent constant

ServiceWorkerContainer class

1. Properties
2. controller
3. onMessage
4. ready
5. hashCode
6. on
7. runtimeType
8. Methods
9. getRegistration
10. getRegistrations
11. register
12. addEventListener
13. dispatchEvent
14. noSuchMethod
15. removeEventListener
16. toString
17. Operators
18. operator ==
19. Constants
20. messageEvent

static const EventStreamProvider<MessageEvent> messageEvent =
    const EventStreamProvider<MessageEvent>('message')