code: @Override
    public boolean eIsSet(int featureID)
    {
      switch (featureID)
      {
        case SimpleExpressionsPackage.COMPARISON__LEFT:
          return left != null;
        case SimpleExpressionsPackage.COMPARISON__OPERATOR:
          return OPERATOR_EDEFAULT == null ? operator != null : !OPERATOR_EDEFAULT.equals(operator);
        case SimpleExpressionsPackage.COMPARISON__RIGHT:
          return right != null;
      }
      return super.eIsSet(featureID);
    }
docs: <!-- begin-user-doc -->
  <!-- end-user-doc -->
  @generated