CollectionView Guide Obsoleted in XS 6.1.1

The Xamarin guide, https://developer.xamarin.com/guides/mac/user-interface/working-with-collection-views/, on how to implement a CollectionView in a Xamarin.Mac app appears to be obsoleted in XS version 6.1.1. I've gotten to the point where I needed an Array Controller, but the IB no longer supports simply dragging and dropping one onto the IB Designer Surface. I can drop it onto the IB's Document Outline but only into a particular scene. And after that, the Content Array binding option as specified in the guide is not available. Not sure what else may have changed after this step since I haven't been able to get past it.

Can we get a revised guide for this?

Thanks