OptionalentityMetadata: Map<number, EntityMetadata>Add fill relationships (IfcRelFillsElement) openingId is the IfcOpeningElement, elementId is the door/window
Add void relationships (IfcRelVoidsElement) hostId is the wall/slab, openingId is the IfcOpeningElement
Build complete OpeningInfo for all openings
OptionalmodelIndex: number
Builder for creating OpeningRelationships from raw relationship data