public Dictionary <ManufacturerId, IManufacturer> CreateManufacturers(
                IEnumerable <ManufacturerId> manufacturerIds)
            {
                Dictionary <ManufacturerId, IManufacturer> dict = new Dictionary <ManufacturerId, IManufacturer>();

                foreach (var manufacturerId in manufacturerIds)
                {
                    var manufacturer = ManufacturerFixture.Create(ManufacturerDefinition.FromId(manufacturerId));
                    dict.Add(manufacturerId, manufacturer);
                }
                return(dict);
            }
            public IManufacturer CreateManufacturer(ManufacturerId manufacturerId)
            {
                var def = ManufacturerDefinition.FromId(manufacturerId);

                return(ManufacturerFixture.Create(def));
            }