API Reference > Classes > Export Classes > TB_IFCEXPORT Namespace > Classes > OdMaterialSetUsageCache Class
OdMaterialSetUsageCache Class
Syntax
C++
class OdMaterialSetUsageCache : public OdBmMap<OdDAIObjectId, OdBmSet<OdDAIObjectId> >;

TbIfcMaterialLayerRelationsCache.h

Add 
Adds the IfcRoot handle to the dictionary.
 
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