@Override
    public EOperation define(EcoreEnvironment env) {
      EOperation eOperation = EcoreFactory.eINSTANCE.createEOperation();
      eOperation.setName(fName);
      int pos = 0;
      for (EClassifier cls : fParamTypes) {
        EParameter eParam = EcoreFactory.eINSTANCE.createEParameter();
        String paramName = cls.getName();
        if (fParamNames != null) {
          paramName = fParamNames[pos++];
        }

        eParam.setName(paramName);
        eParam.setEType(cls);
        eOperation.getEParameters().add(eParam);
      }

      eOperation.setEType(fReturnType);

      assert fContextType instanceof EClass;
      ((EClass) fContextType).getEOperations().add(eOperation);

      CallHandlerAdapter.attach(eOperation, fDispatcher);
      return eOperation;
    }
    public EOperation define(EcoreEnvironment env) {
      List<Variable<EClassifier, EParameter>> argList =
          new ArrayList<Variable<EClassifier, EParameter>>();
      int pos = 0;
      for (EClassifier cls : fParamTypes) {
        Variable<EClassifier, EParameter> stringVariable =
            ExpressionsFactory.eINSTANCE.createVariable();

        String paramName = cls.getName();
        if (fParamNames != null) {
          paramName = fParamNames[pos++];
        }
        stringVariable.setName(paramName);
        stringVariable.setType(cls);
        argList.add(stringVariable);
      }

      EOperation result =
          env.defineOperation(
              fContextType,
              fName,
              fReturnType,
              argList,
              org.eclipse.ocl.ecore.EcoreFactory.eINSTANCE.createConstraint());

      CallHandlerAdapter.attach(result, fDispatcher);

      if (fIsDeprecated) {
        if (fDeprecatedBy != null) {
          QvtOperationalParserUtil.markAsDeprecated(result, fDeprecatedBy);
        } else {
          QvtOperationalParserUtil.markAsDeprecated(result);
        }
      }
      return result;
    }