DistanceConnectors working one-way?

I don’t know if I should feel guilty posting a question about something that I could probably find the answer to with a little bit of Library Reference hunting. But my game authoring time is limited, so I’d rather minimize the time I spend just hunting for the right library methods to override. Do any TADS proficients know the most straightforward way to DistanceConnector one room to another, going only one way? Something like a scaffolding (its own location, not a HighNestedRoom) that can see what’s on the ground floor, but the ground floor can’t see things sitting on the scaffolding levels. Thanks!

I think I got what I needed by adding an Occluder to the DistanceConnector, but I’d still be curious if there’s a nice streamlined way to do it…