I can directly order over a MultiDimensional property, e.g.
set key=$order(obj.prop(key))
However I have a generic method that has to use the $property method, if I know the keys then I can just fetch a value with...
set value=$property(obj,"prop","key")
But if I don't know the keys then I am not aware of a solution to do this, e.g.
set key=$order($property(obj,"prop",key))
will not work.