segments property Null safety

1. jrpn
2. view.lcd_display
3. Digit
4. segments property

Digit class

1. Properties
2. hashCode
3. noWidth
4. runtimeType
5. segments
6. Methods
7. noSuchMethod
8. toString
9. Operators
10. operator ==
11. Static properties
12. digits
13. euroDigits
14. Static methods
15. paint