WAIT_DURATION_MAX constant Null safety

1. baguette
2. UnitTests
3. UnitTests
4. WAIT_DURATION_MAX constant

UnitTests class

1. Constructors
2. UnitTests
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. noSuchMethod
8. toString
9. Operators
10. operator ==
11. Static methods
12. initialize
13. maxWait
14. mediumWait
15. minWait
16. wait
17. Constants
18. WAIT_DURATION_MAX
19. WAIT_DURATION_MEDIUM
20. WAIT_DURATION_MIN