code: @Override
    public boolean eIsSet(int featureID)
    {
      switch (featureID)
      {
        case SimpleAntlrPackage.RULE_ELEMENT__GUARD:
          return guard != null;
        case SimpleAntlrPackage.RULE_ELEMENT__GUARDED:
          return guarded != null;
      }
      return super.eIsSet(featureID);
    }
docs: <!-- begin-user-doc -->
  <!-- end-user-doc -->
  @generated