Function object_id

src/serializers/SvgSerializer.h:749–755

	std::string nameElement(const IfcUtil::IfcBaseEntity* elem);
	std::string idElement(const IfcUtil::IfcBaseEntity* elem);
	std::string object_id(const IfcUtil::IfcBaseEntity* storey, const IfcGeom::Element* o) {
		if (storey) {
			return idElement(storey) + "-" + GeometrySerializer::object_id(o);
		} else {
			return GeometrySerializer::object_id(o);
		}
	}

	void addDrawing(const gp_Pnt& pos, const gp_Dir& dir, const gp_Dir& ref, const std::string& name, bool include_projection) {
		deferred_section_data_.emplace();