code: public void modifyFirstLegBo(KiteConnect kiteConnect) throws KiteException, IOException {
          OrderParams orderParams = new OrderParams();
          orderParams.quantity = 1;
          orderParams.price = 31.0;
          orderParams.transactionType = Constants.TRANSACTION_TYPE_BUY;
          orderParams.tradingsymbol = "SOUTHBANK";
          orderParams.exchange = Constants.EXCHANGE_NSE;
          orderParams.validity = Constants.VALIDITY_DAY;
          orderParams.product = Constants.PRODUCT_MIS;
          orderParams.tag = "myTag";
          orderParams.triggerPrice = 0.0;
  
          Order order = kiteConnect.modifyOrder("180116000798058", orderParams, Constants.VARIETY_BO);
          System.out.println(order.orderId);
      }
docs: Modify first leg bracket order.