ActivityUtils constructor Null safety

1. baguette
2. ActivityUtils
3. ActivityUtils
4. ActivityUtils constructor

ActivityUtils class

1. Constructors
2. ActivityUtils
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. noSuchMethod
8. toString
9. Operators
10. operator ==
11. Static methods
12. createActivity
13. createMessage
14. createOverlayActivity
15. createProgress