Persist a column's current storey-local position and section heading as a
local child of an IfcGridPlacement. Revalidates the live crossing before
writing; stale/unsupported snaps and failed column parameters leave no
helper entities. Heights and offsets are metres at this API boundary.
Persist a column's current storey-local position and section heading as a local child of an IfcGridPlacement. Revalidates the live crossing before writing; stale/unsupported snaps and failed column parameters leave no helper entities. Heights and offsets are metres at this API boundary.