public async Task <IActionResult> GetApproxLocation(string postcode)
        {
            if (postcode == null)
            {
                throw new ArgumentNullException(nameof(postcode));
            }

            string methodName = typeof(UnitManagerController) + "." + nameof(GetApproxLocation);

            using (loggingHelper.RMTraceManager.StartTrace("WebService.GetApproxLocation"))
            {
                loggingHelper.LogMethodEntry(methodName, LoggerTraceConstants.UnitManagerAPIPriority, LoggerTraceConstants.UnitManagerControllerMethodEntryEventId);

                var location = await unitLocationBusinessService.GetApproxLocation(postcode, CurrentUserUnit);

                DBGeometryDTO geometryData = new DBGeometryDTO {
                    Geometry = location
                };

                loggingHelper.LogMethodEntry(methodName, LoggerTraceConstants.UnitManagerAPIPriority, LoggerTraceConstants.UnitManagerControllerMethodEntryEventId);
                return(Ok(geometryData));
            }
        }
        public void Test_GetApproxLocation()
        {
            var result = testCandidate.GetApproxLocation("123", Guid.NewGuid());

            Assert.NotNull(result.Result);
        }