Error since last WIP (creases on SubD)

Does it has changed something on Rhinocommon WIP related to subDCreationOptions?
this bit of code is faulty since yesterday WIP update:
subDOpt = rg.SubDCreationOptions.InteriorCreaseAtMeshEdge

Does this makes sense to somebody??

web reference is not helping much since in case that my assumption that something has changes on Rhinocommon is true, then it still doesn’t reflect does changes

ok " subDOpt = rg.SubDCreationOptions.InteriorCreases" did the job