1. Dart
2. dart:html
3. PushSubscription
4. unsubscribe method

##### PushSubscription class

1. Properties
2. endpoint
3. expirationTime
4. options
5. hashCode
6. runtimeType
7. Methods
8. getKey
9. unsubscribe
10. noSuchMethod
11. toString
12. Operators
13. operator ==

# unsubscribe method

Future<bool> unsubscribe ()

## Implementation

    Future<bool> unsubscribe() =>
        promiseToFuture<bool>(JS("", "#.unsubscribe()", this));