AFAIK, there is no "ProvisionForVoids" inside archicad. I'd love to export ONLY the openings alone as ProvisionForVoids for structural engineers based on their IFC. This is not possible. You have to export parent element.
What you're actually doing is creating new voids from the Solids, so, i'm not quite sure.
Archicad User Since 2013
GDL Developer
Experimenting with API
from Brazil