/// <summary>
        /// Gets Similar Items
        /// </summary>
        /// <param name="query">Required parameter: Query for similar items.</param>
        /// <return>Returns the Models.ItemsResponse response from the API call</return>
        public Models.ItemsResponse GetSimilarItems(Models.GetSimilarItemsBody query)
        {
            Task <Models.ItemsResponse> t = GetSimilarItemsAsync(query);

            APIHelper.RunTaskSynchronously(t);
            return(t.Result);
        }
        /// <summary>
        /// Gets Similar Items
        /// </summary>
        /// <param name="query">Required parameter: Query for similar items.</param>
        /// <return>Returns the Models.ItemsResponse response from the API call</return>
        public async Task <Models.ItemsResponse> GetSimilarItemsAsync(Models.GetSimilarItemsBody query)
        {
            //the base uri for api requestss
            string _baseUri = Configuration.BaseUri;

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

            _queryBuilder.Append("/v1/similar/items");


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

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

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

            //prepare the API call request to fetch the response
            HttpRequest _request = ClientInstance.PostBody(_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);

            //Error handling using HTTP status codes
            if (_response.StatusCode == 400)
            {
                throw new ErrorResponseException(@"Request body is invalid.", _context);
            }

            if (_response.StatusCode == 404)
            {
                throw new ErrorResponseException(@"At least one type in the request does not exist.", _context);
            }

            if (_response.StatusCode == 422)
            {
                throw new ErrorResponseException(@"Required parameters are missing.", _context);
            }

            if ((_response.StatusCode < 200) || (_response.StatusCode > 208)) //[200,208] = HTTP OK
            {
                throw new ErrorResponseException(@"Unexpected internal error.", _context);
            }

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

            try
            {
                return(APIHelper.JsonDeserialize <Models.ItemsResponse>(_response.Body));
            }
            catch (Exception _ex)
            {
                throw new APIException("Failed to parse the response: " + _ex.Message, _context);
            }
        }