Filter Units in Unit View

How can I filter units in the Unit view. I have rooms that belong to different groups. ( ie: Meeting Rooms, Production Rooms, etc. )

I want to be able to turn off or on each group of rooms in the Unit View.

You can filter out events from the view pretty easily
docs.dhtmlx.com/doku.php?id=dhtm … ltration&s[]=scheduler&s[]=filter

but there is no built in ability to filter units, though you can reload the list of units
docs.dhtmlx.com/doku.php?id=dhtm … collection