Yes. It has a good example of how to add a child incident but not of how to create a new collection item. The other thing I was toying with was just creating a new object of type Autosys Interested Party and at that time adding the incident guid, but (a) that feels like cheating and (b) it doesn't create the history in the Incident.
If I can't figure it out I'll probably just use Event Manager, but I find that more complicated to set up.