UseCaseWithoutParams<T> constructor Null safety

1. next_photo
2. base
3. UseCaseWithoutParams<T>
4. UseCaseWithoutParams constructor

UseCaseWithoutParams class

1. Constructors
2. UseCaseWithoutParams
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. call
8. noSuchMethod
9. toString
10. Operators
11. operator ==