1. Dart
2. dart:html
3. RemotePlayback
4. watchAvailability method

RemotePlayback class

1. Properties
2. hashCode
3. on
4. runtimeType
5. state
6. Methods
7. addEventListener
8. cancelWatchAvailability
9. dispatchEvent
10. noSuchMethod
11. prompt
12. removeEventListener
13. toString
14. watchAvailability
15. Operators
16. operator ==

Future<int> watchAvailability(RemotePlaybackAvailabilityCallback callback) =>
    promiseToFuture<int>(JS("", "#.watchAvailability(#)", this, callback));