Here’s the problem-
Given a list of “n” (17 in this example) curves, how could you find which curves belong together (are closed sets)? In other words, create sublists of {1,7,13,5,8,3,14,11},{15,4,12,17,6,10},{16,2,9}.
You do it by getting the archi-lab.net package from the manager and running the curves through the node “Group Curves” 
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That was way too easy…I did searches on Closed, Closure, Close, but never did I search “Group”. Thanks Dimitar.