/// <summary>
        /// Gets a tax rate
        /// </summary>
        /// <param name="productId">Tax rate identifier</param>
        /// <returns>Tax rate</returns>
        public YandexMarketProductRecord GetById(int productId)
        {
            if (productId == 0)
            {
                return(null);
            }

            var obj = this._productRepository.GetById(productId);

            _productRepository.Detach(obj);
            return(obj.FormatMe());
        }