AppUtils constructor Null safety

1. baguette
2. AppUtils
3. AppUtils
4. AppUtils constructor

AppUtils class

1. Constructors
2. AppUtils
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. noSuchMethod
8. toString
9. Operators
10. operator ==
11. Static methods
12. run
13. runCount
14. Constants
15. TAG