// Action that get's called
        [HttpGet, Route("api/setupGroups", Name = "GetSetupGroupsPaged")]
        public HttpResponseMessage GetSetupGroupsPaged(int page = 1, int pageSize = 50)
        {
            page        = page.ToMinimum(MinimumPageIndex);
            pageSize    = pageSize.ToBounds(MinimumPageSize, MaximumPageSize);

            HttpResponseMessage result = null;

            _setupGroupRepository.TryDo(repository =>
            {
                var data = (repository.GetSetupGroups() as IQueryable<SetupGroup>)
                                    .With(query => query.OrderBy(m => m.Id))
                                    .Project()
                                    .To<SetupGroupDto>()
                                    .ToPagedList(page, pageSize);

                result = Request.CreatePagedResponse("GetSetupGroupsPaged", HttpStatusCode.OK, data);
            }).Catch(exception =>
            {
                // TODO: log exception
                result = Request.CreateResponse(HttpStatusCode.InternalServerError,
                    AppMessages.ERROR_UNKNOWN);
            });

            return result;
        }

// annotated method in the same controller

                [UnitOfWork]
        [HttpPost, Route("api/setupGroups/{setupGroupId:int}/mappings")]
        public virtual HttpResponseMessage CreateSetupGroupMapping(int setupGroupId, CameraDisplayMapDto data)
        {
            if (!ModelState.IsValid)
                return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState);

            HttpResponseMessage result = null;

            _setupGroupRepository.TryDo(repository =>
            {
                var setupGroup = repository.GetSetupGroupById(setupGroupId);
                if (setupGroup == null)
                {
                    result = Request.CreateResponse(HttpStatusCode.NotFound);
                    return;
                }

                var cameraDisplayMap = Mapper.Map<CameraDisplayMap>(data);
                setupGroup.TryDo(x =>
                {
                    x.AddMapping(cameraDisplayMap);
                    repository.UpdateSetupGroup(x);

                    result = Request.CreateResponse(HttpStatusCode.Created);
                }, typeof(InvalidOperationException))
                    .Catch(exception =>
                    {
                        // TODO: log exception
                        result = Request.CreateResponse(HttpStatusCode.BadRequest);
                    });
            });

            return result;
        }