API Reference > OdIfc4 Namespace > Classes > IfcLightDistributionDataSourceSelect Class > IfcLightDistributionDataSourceSelect Methods > IfcLightDistributionDataSourceSelect::isIfcExternalReference Method
IfcLightDistributionDataSourceSelect::isIfcExternalReference Method
Syntax
C++
bool isIfcExternalReference();

This is isIfcExternalReference, a member of class IfcLightDistributionDataSourceSelect.

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