/// <summary>
        /// Initiates the asynchronous execution of the DescribeVolumes operation.
        /// </summary>
        /// 
        /// <param name="request">Container for the necessary parameters to execute the DescribeVolumes 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<DescribeVolumesResponse> DescribeVolumesAsync(DescribeVolumesRequest request, System.Threading.CancellationToken cancellationToken = default(CancellationToken))
        {
            var marshaller = new DescribeVolumesRequestMarshaller();
            var unmarshaller = DescribeVolumesResponseUnmarshaller.Instance;

            return InvokeAsync<DescribeVolumesRequest,DescribeVolumesResponse>(request, marshaller, 
                unmarshaller, cancellationToken);
        }

        public void DescribeVolumesMarshallTest()
        {
            var operation = service_model.FindOperation("DescribeVolumes");

            var request = InstantiateClassGenerator.Execute<DescribeVolumesRequest>();
            var marshaller = new DescribeVolumesRequestMarshaller();
            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 = DescribeVolumesResponseUnmarshaller.Instance.Unmarshall(context)
                as DescribeVolumesResponse;   
            InstantiateClassGenerator.ValidateObjectFullyInstantiated(response);       
        }

        public void DescribeVolumesMarshallTest()
        {
            var request = InstantiateClassGenerator.Execute<DescribeVolumesRequest>();
            var marshaller = new DescribeVolumesRequestMarshaller();

            var internalRequest = marshaller.Marshall(request);
            var jsonRequest = UTF8Encoding.UTF8.GetString(internalRequest.Content);                        
            Comparer.CompareObjectToJson<DescribeVolumesRequest>(request,jsonRequest);

            var webResponse = new WebResponseData
            {
                Headers = {
                    {"x-amzn-RequestId", Guid.NewGuid().ToString()},
                    {"x-amz-crc32","0"}
                }
            };
            var jsonResponse = new JsonSampleGenerator(service_model, service_model.FindOperation("DescribeVolumes").ResponseStructure).Execute();
            webResponse.Headers.Add("Content-Length", UTF8Encoding.UTF8.GetBytes(jsonResponse).Length.ToString());
            UnmarshallerContext context = new JsonUnmarshallerContext(Utils.CreateStreamFromString(jsonResponse), false, webResponse);
            var response = DescribeVolumesResponseUnmarshaller.Instance.Unmarshall(context)
                as DescribeVolumesResponse;
            InstantiateClassGenerator.ValidateObjectFullyInstantiated(response);
        }

        /// <summary>
        /// Describes the specified EBS volumes.
        /// 
        ///  
        /// <para>
        /// If you are describing a long list of volumes, you can paginate the output to make
        /// the list more manageable. The <code>MaxResults</code> parameter sets the maximum number
        /// of results returned in a single page. If the list of results exceeds your <code>MaxResults</code>
        /// value, then that number of results is returned along with a <code>NextToken</code>
        /// value that can be passed to a subsequent <code>DescribeVolumes</code> request to retrieve
        /// the remaining results.
        /// </para>
        ///  
        /// <para>
        /// For more information about EBS volumes, see <a href='http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/EBSVolumes.html'>Amazon
        /// EBS Volumes</a> in the <i>Amazon Elastic Compute Cloud User Guide</i>.
        /// </para>
        /// </summary>
        /// <param name="request">Container for the necessary parameters to execute the DescribeVolumes service method.</param>
        /// 
        /// <returns>The response from the DescribeVolumes service method, as returned by EC2.</returns>
        public DescribeVolumesResponse DescribeVolumes(DescribeVolumesRequest request)
        {
            var marshaller = new DescribeVolumesRequestMarshaller();
            var unmarshaller = DescribeVolumesResponseUnmarshaller.Instance;

            return Invoke<DescribeVolumesRequest,DescribeVolumesResponse>(request, marshaller, unmarshaller);
        }

        /// <summary>
        /// Initiates the asynchronous execution of the DescribeVolumes operation.
        /// </summary>
        /// 
        /// <param name="request">Container for the necessary parameters to execute the DescribeVolumes 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 EndDescribeVolumes
        ///         operation.</returns>
        public IAsyncResult BeginDescribeVolumes(DescribeVolumesRequest request, AsyncCallback callback, object state)
        {
            var marshaller = new DescribeVolumesRequestMarshaller();
            var unmarshaller = DescribeVolumesResponseUnmarshaller.Instance;

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

 IAsyncResult invokeDescribeVolumes(DescribeVolumesRequest describeVolumesRequest, AsyncCallback callback, object state, bool synchronized)
 {
     IRequest irequest = new DescribeVolumesRequestMarshaller().Marshall(describeVolumesRequest);
     var unmarshaller = DescribeVolumesResponseUnmarshaller.GetInstance();
     AsyncResult result = new AsyncResult(irequest, callback, state, synchronized, signer, unmarshaller);
     Invoke(result);
     return result;
 }

        /// <summary>
        /// <para>Describes an instance's Amazon EBS volumes.</para> <para><b>NOTE:</b>You must specify at least one of the parameters.</para> <para>
        /// <b>Required Permissions</b> : To use this action, an IAM user must have a Show, Deploy, or Manage permissions level for the stack, or an
        /// attached policy that explicitly grants permissions. For more information on user permissions, see <a href="http://docs.aws.amazon.com/opsworks/latest/userguide/opsworks-security-users.html">Managing User Permissions</a> .</para>
        /// </summary>
        /// 
        /// <param name="describeVolumesRequest">Container for the necessary parameters to execute the DescribeVolumes service method on
        /// AmazonOpsWorks.</param>
        /// 
        /// <returns>The response from the DescribeVolumes service method, as returned by AmazonOpsWorks.</returns>
        /// 
        /// <exception cref="T:Amazon.OpsWorks.Model.ResourceNotFoundException" />
        /// <exception cref="T:Amazon.OpsWorks.Model.ValidationException" />
        /// <param name="cancellationToken">
        ///     A cancellation token that can be used by other objects or threads to receive notice of cancellation.
        /// </param>
		public Task<DescribeVolumesResponse> DescribeVolumesAsync(DescribeVolumesRequest describeVolumesRequest, CancellationToken cancellationToken = default(CancellationToken))
        {
            var marshaller = new DescribeVolumesRequestMarshaller();
            var unmarshaller = DescribeVolumesResponseUnmarshaller.GetInstance();
            return Invoke<IRequest, DescribeVolumesRequest, DescribeVolumesResponse>(describeVolumesRequest, marshaller, unmarshaller, signer, cancellationToken);
        }

        /// <summary>
        /// Initiates the asynchronous execution of the DescribeVolumes operation.
        /// <seealso cref="Amazon.EC2.IAmazonEC2.DescribeVolumes"/>
        /// </summary>
        /// 
        /// <param name="request">Container for the necessary parameters to execute the DescribeVolumes 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<DescribeVolumesResponse> DescribeVolumesAsync(DescribeVolumesRequest request, CancellationToken cancellationToken = default(CancellationToken))
        {
            var marshaller = new DescribeVolumesRequestMarshaller();
            var unmarshaller = DescribeVolumesResponseUnmarshaller.GetInstance();
            var response = await Invoke<IRequest, DescribeVolumesRequest, DescribeVolumesResponse>(request, marshaller, unmarshaller, signer, cancellationToken)
                .ConfigureAwait(continueOnCapturedContext: false);
            return response;
        }

        IAsyncResult invokeDescribeVolumes(DescribeVolumesRequest request, AsyncCallback callback, object state, bool synchronized)
        {
            var marshaller = new DescribeVolumesRequestMarshaller();
            var unmarshaller = DescribeVolumesResponseUnmarshaller.Instance;

            return Invoke(request, callback, state, synchronized, marshaller, unmarshaller, signer);
        }