API Reference > OdIfc4x1 Namespace > Classes > IfcLightDistributionDataSourceSelect Class > IfcLightDistributionDataSourceSelect Methods > IfcLightDistributionDataSourceSelect::isIfcExternalReference Method
IfcLightDistributionDataSourceSelect::isIfcExternalReference Method
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Syntax
C++
bool isIfcExternalReference();
Group
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