code: public OkCoinBatchTradeResult cancelUpToThreeOrders(Set<Long> orderIds, String symbol)
        throws IOException {
      String ids =
          orderIds.stream().map(Object::toString).collect(Collectors.joining(BATCH_DELIMITER));
      return okCoin.cancelOrders(apikey, ids, symbol, signatureCreator());
    }
docs: 多笔订单取消 一次最多取消三个订单
  
  @param orderIds
  @param symbol
  @return
  @throws IOException