public async Task <IActionResult> AddStocks(AddStocksRequest request, CancellationToken cancellationToken)
        {
            var command = ApiContractMapper.ToServiceCommand(request);

            await addStocksCommandHandler.HandleAsync(command, cancellationToken).ConfigureAwait(false);

            return(NoContent());
        }
        public static AddStocksCommand ToServiceCommand(AddStocksRequest apiRequest)
        {
            if (apiRequest == null)
            {
                return(null);
            }

            return(new AddStocksCommand(apiRequest.Items.Select(r => ToServiceCommand(r)), apiRequest.TransactionId));
        }