Logical constructor Null safety

1. ari_utils
2. ari_utils
3. Logical
4. Logical constructor

Logical class

1. Constructors
2. Logical
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. noSuchMethod
8. toString
9. Operators
10. operator ==
11. Static methods
12. all
13. any
14. nor
15. not
16. toBit
17. xand
18. xor