[Pharo-users] [Spec] How to adding my scroll bar

Hello, I have a component that basically contains lot of widgets and I want to add a scroll bar to it. But I didn't find a way to do this. I'm using Pharo 2.0 (I know 3.0 is better but I needed something stable). My spec is a ColumnLayout with lot of rows. Maybe I should use another? Can someone point me where to look at?