/// <summary>
        /// Initiates the asynchronous execution of the DescribeAvailabilityOptions operation.
        /// <seealso cref="Amazon.CloudSearch_2011_02_01.IAmazonCloudSearch"/>
        /// </summary>
        /// 
        /// <param name="request">Container for the necessary parameters to execute the DescribeAvailabilityOptions 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<DescribeAvailabilityOptionsResponse> DescribeAvailabilityOptionsAsync(DescribeAvailabilityOptionsRequest request, System.Threading.CancellationToken cancellationToken = default(CancellationToken))
        {
            var marshaller = new DescribeAvailabilityOptionsRequestMarshaller();
            var unmarshaller = DescribeAvailabilityOptionsResponseUnmarshaller.Instance;

            return InvokeAsync<DescribeAvailabilityOptionsRequest,DescribeAvailabilityOptionsResponse>(request, marshaller,
                unmarshaller, cancellationToken);
        }
        internal DescribeAvailabilityOptionsResponse DescribeAvailabilityOptions(DescribeAvailabilityOptionsRequest request)
        {
            var marshaller = new DescribeAvailabilityOptionsRequestMarshaller();
            var unmarshaller = DescribeAvailabilityOptionsResponseUnmarshaller.Instance;

            return Invoke<DescribeAvailabilityOptionsRequest,DescribeAvailabilityOptionsResponse>(request, marshaller, unmarshaller);
        }
        /// <summary>
        /// Initiates the asynchronous execution of the DescribeAvailabilityOptions operation.
        /// <seealso cref="Amazon.CloudSearch_2011_02_01.IAmazonCloudSearch"/>
        /// </summary>
        /// 
        /// <param name="request">Container for the necessary parameters to execute the DescribeAvailabilityOptions operation on AmazonCloudSearchClient.</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 EndDescribeAvailabilityOptions
        ///         operation.</returns>
        public IAsyncResult BeginDescribeAvailabilityOptions(DescribeAvailabilityOptionsRequest request, AsyncCallback callback, object state)
        {
            var marshaller = new DescribeAvailabilityOptionsRequestMarshaller();
            var unmarshaller = DescribeAvailabilityOptionsResponseUnmarshaller.Instance;

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