/// <summary>
        /// TODO: type endpoint description here
        /// </summary>
        /// <param name="orderId">Required parameter: Order Id</param>
        /// <param name="itemId">Required parameter: Item Id</param>
        /// <param name="request">Required parameter: Item Model</param>
        /// <param name="idempotencyKey">Optional parameter: Example: </param>
        /// <return>Returns the Models.GetOrderItemResponse response from the API call</return>
        public async Task <Models.GetOrderItemResponse> UpdateOrderItemAsync(
            string orderId,
            string itemId,
            Models.UpdateOrderItemRequest request,
            string idempotencyKey = null)
        {
            //the base uri for api requests
            string _baseUri = Configuration.BaseUri;

            //prepare query string for API call
            StringBuilder _queryBuilder = new StringBuilder(_baseUri);

            _queryBuilder.Append("/orders/{orderId}/items/{itemId}");

            //process optional template parameters
            APIHelper.AppendUrlWithTemplateParameters(_queryBuilder, new Dictionary <string, object>()
            {
                { "orderId", orderId },
                { "itemId", itemId }
            });


            //validate and preprocess url
            string _queryUrl = APIHelper.CleanUrl(_queryBuilder);

            //append request with appropriate headers and parameters
            var _headers = new Dictionary <string, string>()
            {
                { "user-agent", "MundiSDK - DotNet 0.16.6" },
                { "accept", "application/json" },
                { "content-type", "application/json; charset=utf-8" },
                { "idempotency-key", idempotencyKey }
            };

            //append body params
            var _body = APIHelper.JsonSerialize(request);

            //prepare the API call request to fetch the response
            HttpRequest _request = ClientInstance.PutBody(_queryUrl, _headers, _body, Configuration.BasicAuthUserName, Configuration.BasicAuthPassword);

            //invoke request and get response
            HttpStringResponse _response = (HttpStringResponse)await ClientInstance.ExecuteAsStringAsync(_request).ConfigureAwait(false);

            HttpContext _context = new HttpContext(_request, _response);

            //handle errors defined at the API level
            base.ValidateResponse(_response, _context);

            try
            {
                return(APIHelper.JsonDeserialize <Models.GetOrderItemResponse>(_response.Body));
            }
            catch (Exception _ex)
            {
                throw new APIException("Failed to parse the response: " + _ex.Message, _context);
            }
        }
        /// <summary>
        /// TODO: type endpoint description here
        /// </summary>
        /// <param name="orderId">Required parameter: Order Id</param>
        /// <param name="itemId">Required parameter: Item Id</param>
        /// <param name="request">Required parameter: Item Model</param>
        /// <param name="idempotencyKey">Optional parameter: Example: </param>
        /// <return>Returns the Models.GetOrderItemResponse response from the API call</return>
        public Models.GetOrderItemResponse UpdateOrderItem(
            string orderId,
            string itemId,
            Models.UpdateOrderItemRequest request,
            string idempotencyKey = null)
        {
            Task <Models.GetOrderItemResponse> t = UpdateOrderItemAsync(orderId, itemId, request, idempotencyKey);

            APIHelper.RunTaskSynchronously(t);
            return(t.Result);
        }