code: @Override
    public void eSet(int featureID, Object newValue)
    {
      switch (featureID)
      {
        case SimpleExpressionsPackage.NOT_EXPRESSION__EXPRESSION:
          setExpression((Expression)newValue);
          return;
      }
      super.eSet(featureID, newValue);
    }
docs: <!-- begin-user-doc -->
  <!-- end-user-doc -->
  @generated