code: @Override
  	public EClass getIfcRationalBSplineCurveWithKnots() {
  		if (ifcRationalBSplineCurveWithKnotsEClass == null) {
  			ifcRationalBSplineCurveWithKnotsEClass = (EClass) EPackage.Registry.INSTANCE
  					.getEPackage(Ifc4Package.eNS_URI).getEClassifiers().get(500);
  		}
  		return ifcRationalBSplineCurveWithKnotsEClass;
  	}
docs: <!-- begin-user-doc -->
  <!-- end-user-doc -->
  @generated