1. Dart
2. dart:html
3. PushManager
4. getSubscription method

PushManager class

1. Properties
2. hashCode
3. runtimeType
4. Methods
5. getSubscription
6. noSuchMethod
7. permissionState
8. subscribe
9. toString
10. Operators
11. operator ==
12. Static properties
13. supportedContentEncodings

Future<PushSubscription> getSubscription() =>
    promiseToFuture<PushSubscription>(JS("", "#.getSubscription()", this));