code: @Override
  	public EEnum getIfcDoorStyleOperationEnum() {
  		if (ifcDoorStyleOperationEnumEEnum == null) {
  			ifcDoorStyleOperationEnumEEnum = (EEnum) EPackage.Registry.INSTANCE.getEPackage(Ifc4Package.eNS_URI)
  					.getEClassifiers().get(968);
  		}
  		return ifcDoorStyleOperationEnumEEnum;
  	}
docs: <!-- begin-user-doc -->
  <!-- end-user-doc -->
  @generated