SDK: searching for class Autodesk.AutoCAD.DatabaseServices.AssocNetwork, Assoc2dConstraintGroup, etc

Hello,

I have to convert some code from AutoCAD ObjectARX/.NET to BricsCad.
I'm searching for classes like AssocNetwork, Assoc2dConstraintGroup, etc. The AutoCAD namespace is Autodesk.AutoCAD.DatabaseServices.

What can I do?

thanks a lot

faceter