public EClass getIfcOpticalMaterialProperties() {
		if (ifcOpticalMaterialPropertiesEClass == null) {
			ifcOpticalMaterialPropertiesEClass = (EClass) EPackage.Registry.INSTANCE
					.getEPackage(Ifc2x3tc1Package.eNS_URI).getEClassifiers().get(337);
		}
		return ifcOpticalMaterialPropertiesEClass;
	}
public EClass getIfcOpticalMaterialProperties ( ) { if ( ifcOpticalMaterialPropertiesEClass == null ) { ifcOpticalMaterialPropertiesEClass = ( EClass ) EPackage . Registry . INSTANCE . getEPackage ( Ifc2x3tc1Package . eNS_URI ) . getEClassifiers ( ) . get ( 337 ) ; } return ifcOpticalMaterialPropertiesEClass ; }
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@generated