public bool IsOrdersReceived()
        {
            try
            {
                var response = this._client.ListOrders( this._request );
                if( !response.IsSetListOrdersResult() )
                    return false;
                if( !response.ListOrdersResult.IsSetOrders() )
                    return true;

                var orders = response.ListOrdersResult.Orders.Select( o => new ComposedOrder( o ) ).ToList();
                foreach( var order in orders.Take( 5 ) )
                {
                    var itemsService = new OrderItemsService( this._client, new ListOrderItemsRequest
                    {
                        AmazonOrderId = order.AmazonOrder.AmazonOrderId,
                        SellerId = this._request.SellerId,
                        MWSAuthToken = this._request.MWSAuthToken
                    }, this._orderItemsThrottler );

                    if( !itemsService.IsOrderItemsReceived() )
                        return false;
                }
                return true;
            }
            catch( Exception )
            {
                return false;
            }
        }
        private IEnumerable<OrderItem> GetOrderItems( string orderId )
        {
            var itemsService = new OrderItemsService( this._client, new ListOrderItemsRequest
            {
                AmazonOrderId = orderId,
                SellerId = this._request.SellerId,
                MWSAuthToken = this._request.MWSAuthToken
            }, _orderItemsThrottler );

            return itemsService.LoadOrderItems();
        }