internal DescribeTagsResponse DescribeTags(DescribeTagsRequest request)
        {
            var marshaller = new DescribeTagsRequestMarshaller();
            var unmarshaller = DescribeTagsResponseUnmarshaller.Instance;

            return Invoke<DescribeTagsRequest,DescribeTagsResponse>(request, marshaller, unmarshaller);
        }

        /// <summary>
        /// Initiates the asynchronous execution of the DescribeTags operation.
        /// </summary>
        /// 
        /// <param name="request">Container for the necessary parameters to execute the DescribeTags operation.</param>
        /// <param name="cancellationToken">
        ///     A cancellation token that can be used by other objects or threads to receive notice of cancellation.
        /// </param>
        /// <returns>The task object representing the asynchronous operation.</returns>
        public Task<DescribeTagsResponse> DescribeTagsAsync(DescribeTagsRequest request, System.Threading.CancellationToken cancellationToken = default(CancellationToken))
        {
            var marshaller = new DescribeTagsRequestMarshaller();
            var unmarshaller = DescribeTagsResponseUnmarshaller.Instance;

            return InvokeAsync<DescribeTagsRequest,DescribeTagsResponse>(request, marshaller, 
                unmarshaller, cancellationToken);
        }

 IAsyncResult invokeDescribeTags(DescribeTagsRequest describeTagsRequest, AsyncCallback callback, object state, bool synchronized)
 {
     IRequest irequest = new DescribeTagsRequestMarshaller().Marshall(describeTagsRequest);
     var unmarshaller = DescribeTagsResponseUnmarshaller.GetInstance();
     AsyncResult result = new AsyncResult(irequest, callback, state, synchronized, signer, unmarshaller);
     Invoke(result);
     return result;
 }

        public void DescribeTagsMarshallTest()
        {
            var operation = service_model.FindOperation("DescribeTags");

            var request = InstantiateClassGenerator.Execute<DescribeTagsRequest>();
            var marshaller = new DescribeTagsRequestMarshaller();
            var internalRequest = marshaller.Marshall(request);
            var validator = new AWSQueryValidator(internalRequest.Parameters, request, service_model, operation);
            validator.Validate();


            var payloadResponse = new XmlSampleGenerator(service_model, operation).Execute();
            UnmarshallerContext context = new EC2UnmarshallerContext(Utils.CreateStreamFromString(payloadResponse), false, new WebResponseData());
            var response = DescribeTagsResponseUnmarshaller.Instance.Unmarshall(context)
                as DescribeTagsResponse;   
            InstantiateClassGenerator.ValidateObjectFullyInstantiated(response);       
        }

        /// <summary>
        /// Initiates the asynchronous execution of the DescribeTags operation.
        /// </summary>
        /// 
        /// <param name="request">Container for the necessary parameters to execute the DescribeTags operation on AmazonEC2Client.</param>
        /// <param name="callback">An AsyncCallback delegate that is invoked when the operation completes.</param>
        /// <param name="state">A user-defined state object that is passed to the callback procedure. Retrieve this object from within the callback
        ///          procedure using the AsyncState property.</param>
        /// 
        /// <returns>An IAsyncResult that can be used to poll or wait for results, or both; this value is also needed when invoking EndDescribeTags
        ///         operation.</returns>
        public IAsyncResult BeginDescribeTags(DescribeTagsRequest request, AsyncCallback callback, object state)
        {
            var marshaller = new DescribeTagsRequestMarshaller();
            var unmarshaller = DescribeTagsResponseUnmarshaller.Instance;

            return BeginInvoke<DescribeTagsRequest>(request, marshaller, unmarshaller,
                callback, state);
        }

        /// <summary>
        /// Initiates the asynchronous execution of the DescribeTags operation.
        /// <seealso cref="Amazon.AutoScaling.IAmazonAutoScaling.DescribeTags"/>
        /// </summary>
        /// 
        /// <param name="request">Container for the necessary parameters to execute the DescribeTags operation.</param>
        /// <param name="cancellationToken">
        ///     A cancellation token that can be used by other objects or threads to receive notice of cancellation.
        /// </param>
        /// <returns>The task object representing the asynchronous operation.</returns>
		public Task<DescribeTagsResponse> DescribeTagsAsync(DescribeTagsRequest request, CancellationToken cancellationToken = default(CancellationToken))
        {
            var marshaller = new DescribeTagsRequestMarshaller();
            var unmarshaller = DescribeTagsResponseUnmarshaller.GetInstance();
            return Invoke<IRequest, DescribeTagsRequest, DescribeTagsResponse>(request, marshaller, unmarshaller, signer, cancellationToken);
        }

        /// <summary>
        /// Initiates the asynchronous execution of the DescribeTags operation.
        /// <seealso cref="Amazon.EC2.IAmazonEC2.DescribeTags"/>
        /// </summary>
        /// 
        /// <param name="request">Container for the necessary parameters to execute the DescribeTags operation.</param>
        /// <param name="cancellationToken">
        ///     A cancellation token that can be used by other objects or threads to receive notice of cancellation.
        /// </param>
        /// <returns>The task object representing the asynchronous operation.</returns>
		public async Task<DescribeTagsResponse> DescribeTagsAsync(DescribeTagsRequest request, CancellationToken cancellationToken = default(CancellationToken))
        {
            var marshaller = new DescribeTagsRequestMarshaller();
            var unmarshaller = DescribeTagsResponseUnmarshaller.GetInstance();
            var response = await Invoke<IRequest, DescribeTagsRequest, DescribeTagsResponse>(request, marshaller, unmarshaller, signer, cancellationToken)
                .ConfigureAwait(continueOnCapturedContext: false);
            return response;
        }

        public void DescribeTagsMarshallTest()
        {
            var operation = service_model.FindOperation("DescribeTags");

            var request = InstantiateClassGenerator.Execute<DescribeTagsRequest>();
            var marshaller = new DescribeTagsRequestMarshaller();

            var internalRequest = marshaller.Marshall(request);
            RequestValidator.Validate("DescribeTags", request, internalRequest, service_model);            

            var webResponse = new WebResponseData
            {
                Headers = {
                    {"x-amzn-RequestId", Guid.NewGuid().ToString()},
                    {"x-amz-crc32","0"}
                }
            };

            var payloadResponse = new JsonSampleGenerator(service_model, operation.ResponseStructure).Execute();
            webResponse.Headers.Add("Content-Length", UTF8Encoding.UTF8.GetBytes(payloadResponse).Length.ToString());
            var context = new JsonUnmarshallerContext(Utils.CreateStreamFromString(payloadResponse), false, webResponse);
            ResponseUnmarshaller unmarshaller = DescribeTagsResponseUnmarshaller.Instance;
            var response = unmarshaller.Unmarshall(context)
                as DescribeTagsResponse;   
            InstantiateClassGenerator.ValidateObjectFullyInstantiated(response);               
        }

 /// <summary>
 /// <para> Lists the Auto Scaling group tags. </para> <para> You can use filters to limit results when describing tags. For example, you can
 /// query for tags of a particular Auto Scaling group. You can specify multiple values for a filter. A tag must match at least one of the
 /// specified values for it to be included in the results. </para> <para> You can also specify multiple filters. The result includes information
 /// for a particular tag only if it matches all your filters. If there's no match, no special message is returned. </para>
 /// </summary>
 /// 
 /// <param name="describeTagsRequest">Container for the necessary parameters to execute the DescribeTags service method on
 ///           AmazonAutoScaling.</param>
 /// 
 /// <returns>The response from the DescribeTags service method, as returned by AmazonAutoScaling.</returns>
 /// 
 /// <exception cref="InvalidNextTokenException"/>
 public DescribeTagsResponse DescribeTags(DescribeTagsRequest describeTagsRequest)
 {
     IRequest<DescribeTagsRequest> request = new DescribeTagsRequestMarshaller().Marshall(describeTagsRequest);
     DescribeTagsResponse response = Invoke<DescribeTagsRequest, DescribeTagsResponse> (request, this.signer, DescribeTagsResponseUnmarshaller.GetInstance());
     return response;
 }