code: public EEnum getIfcWindowStyleConstructionEnum() {
  		if (ifcWindowStyleConstructionEnumEEnum == null) {
  			ifcWindowStyleConstructionEnumEEnum = (EEnum) EPackage.Registry.INSTANCE
  					.getEPackage(Ifc2x3tc1Package.eNS_URI).getEClassifiers().get(931);
  		}
  		return ifcWindowStyleConstructionEnumEEnum;
  	}
docs: <!-- begin-user-doc -->
  <!-- end-user-doc -->
  @generated