code: @Override
    public boolean eIsSet(int featureID)
    {
      switch (featureID)
      {
        case SimpleExpressionsPackage.IF_CONDITION__ELSEIF:
          return elseif != ELSEIF_EDEFAULT;
        case SimpleExpressionsPackage.IF_CONDITION__CONDITION:
          return condition != null;
      }
      return super.eIsSet(featureID);
    }
docs: <!-- begin-user-doc -->
  <!-- end-user-doc -->
  @generated