How do I iterate though a family's members?

I'm working on a level editor for my game, and I have a family called collidables you can run into. I've gotten a bunch of the editor working, but now I need to be able to select the family elements so I can actually create the level. I figured I could do this by going through each element of the family and pinning it to a scrollable background element, but I can't figure out how to iterate through the family. Help? Thanks in advance!

System.Foreach

That only works on the instances though. At the time of me going through it, there aren't any instances. I'm trying to go through the group itself.

You can't do that.

Ok, I've been working on a workaround anyways. Thanks.