code: @Override
  	public EEnum getIfcSIUnitName() {
  		if (ifcSIUnitNameEEnum == null) {
  			ifcSIUnitNameEEnum = (EEnum) EPackage.Registry.INSTANCE.getEPackage(Ifc4Package.eNS_URI).getEClassifiers()
  					.get(1057);
  		}
  		return ifcSIUnitNameEEnum;
  	}
docs: <!-- begin-user-doc -->
  <!-- end-user-doc -->
  @generated