code: public OkCoinOrderResult getOrder(String symbol, Integer type, String... orderIds)
        throws IOException {
      if (orderIds == null || orderIds.length > 50) {
        throw new UnsupportedOperationException(
            "Can only get 1 to 50 orders. " + orderIds.length + " orders provided.");
      }
      String ids = Arrays.stream(orderIds).collect(Collectors.joining(","));
  
      return super.getOrder(symbol, type, ids);
    }
docs: todo 批量获取用户订单
  
  @param symbol
  @param type 查询类型 0:未完成的订单 1:已经完成的订单
  @param orderIds 多个订单ID中间以","分隔,一次最多允许查询50个订单
  @return
  @throws IOException