height property Null safety

1. diginote
2. screen_model
3. Screen
4. height property

Screen class

1. Constructors
2. Screen
3. fromJson
4. Properties
5. hashCode
6. height
7. lastUpdated
8. name
9. paired
10. pairingCode
11. runtimeType
12. screenToken
13. userID
14. width
15. Methods
16. noSuchMethod
17. toJson
18. toString
19. Operators
20. operator ==