INotificationsManager constructor Null safety

1. baguette
2. INotificationsManager
3. INotificationsManager
4. INotificationsManager constructor

INotificationsManager class

1. Constructors
2. INotificationsManager
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. addPlugin
8. cleanPlugins
9. getPlugin
10. noSuchMethod
11. removePlugin
12. toString
13. Operators
14. operator ==