| ⇢ | A | NotificationListener added | |
| A | ↛ | PushNotificationHandler removed |
| ⇢ | B | NotificationListener::handle() added | |
| ⇢ | A | NotificationListener::push() added | |
| ⇢ | A | NotificationListener::subscribe() added | |
| ⇢ | A | NotificationListener::__construct() added | |
| B | ↛ | PushNotificationHandler::handle() removed | |
| A | ↛ | PushNotificationHandler::push() removed | |
| A | ↛ | PushNotificationHandler::subscribe() removed | |
| A | ↛ | PushNotificationHandler::__construct() removed |