code: @Override
  	public EEnum getIfcStructuralCurveActivityTypeEnum() {
  		if (ifcStructuralCurveActivityTypeEnumEEnum == null) {
  			ifcStructuralCurveActivityTypeEnumEEnum = (EEnum) EPackage.Registry.INSTANCE
  					.getEPackage(Ifc4Package.eNS_URI).getEClassifiers().get(1073);
  		}
  		return ifcStructuralCurveActivityTypeEnumEEnum;
  	}
docs: <!-- begin-user-doc -->
  <!-- end-user-doc -->
  @generated