Every existing IfcSpace's footprint ring, per storey expressId, with its
id. Storeys without one are omitted. Refuses the whole store (empty map)
when the length-unit scale can't be trusted — the same refusal
storeyPlanFrame makes on the write side, so the two never disagree.
Every existing IfcSpace's footprint ring, per storey expressId, with its id. Storeys without one are omitted. Refuses the whole store (empty map) when the length-unit scale can't be trusted — the same refusal
storeyPlanFramemakes on the write side, so the two never disagree.