invisible actor at group (libgdx)

I add to HorizontalGroup several actors: 1, 2, 3. I want to set invisible 2nd actor, and it doesn’t take any space (seems in Android View.GONE – http://developer.android.com/reference/android/view/View.html#GONE).

But now if set to 2nd actor setVisible(false), I still see empty space between 1nd and 3rd actors.

What’s I need did? Each time addActor/removeActor from HorizontalGroup if want hide/show actor?