Now I would suggest closing LotteryPicker class, T...

# announcements

[alien11689]

Now I would suggest closing LotteryPicker class, There is no need to create specific subclasses.

[alien11689]

@Danilo Herrera
Function `refill`: you do not need explicit for. You can rewrite its body to:

(1..size).forEach { add(it) }

or even

addAll(1..size)

[Danilo Herrera]

Nice! I just realized that the set would have to be cleared first, but kudos for more concise method of adding the numbers