private IByteBuffer GetByteBuffer(TransportMessage message, out int contentLength)
        {
            contentLength = 0;
            if (!message.IsHttpResultMessage())
            {
                return(null);
            }

            var httpResultMessage = message.GetContent <HttpResultMessage>();
            var data = Encoding.UTF8.GetBytes(_serializer.Serialize(httpResultMessage));

            contentLength = data.Length;
            return(Unpooled.WrappedBuffer(data));
        }