Associative Region in Reference to GC elements

I have a 2D file referenced into my GC model that has Associative Regions (created by flooding mixed "control" elements: line/shape/circle/bspline/etc).
I would like to interrogate/use these region "shapes" in my GC script as a form of input but cant see an appropriate node for this.

Before I head of into over-doing-it land and writing custom functions, I just want to check I'm not missing a trick.

Just as a side note:

Most of the fundamental MicroStation elements are represented: ie. Point, Line, Arc, Line-String, Shape, Circle, BSpline
but the second tier of elements seem to be much harder to interact with. eg. complex chain, complex shape, region/grouped hole

Could we get a set of nodes that map 1:1 with all each of the fundamental MicroStation types?

Another anomaly is why is Cone its own solid? It is represented in the Solid node. So again, just to be consistent shouldn't all the primitive solid have a node /or/ should cone only be accessed from the solid tool? 

Regards

Robert

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