| C | ↘ | D | RegistrationContext got worse | 
| ⇢ | A | RegistrationContext.php$0 ➔ registerNotifierServic... added | |
| ⇢ | A | RegistrationContext.php$0 ➔ getNotifierServices() added | |
| A | ↘ | B | Manager::getNotifiers() got worse | 
| A | ↛ | Application::registerNotifier() removed | |
| A | ↛ | Application::registerNotification() removed | |
| A | ↛ | Application::registerNotification() removed | |
| A | ↛ | Application::registerNotificationManager() removed | |
| A | ↛ | Application::registerNotifier() removed |