1. m4e_sdk
2. dart:html
3. MediaSession
4. setActionHandler method

MediaSession class

1. Properties
2. metadata
3. playbackState
4. hashCode
5. runtimeType
6. Methods
7. setActionHandler
8. noSuchMethod
9. toString
10. Operators
11. operator ==

void setActionHandler(String action, MediaSessionActionHandler handler)
    native;