text: public virtual DescribeReservedInstancesResponse DescribeReservedInstances(DescribeReservedInstancesRequest request){var options = new InvokeOptions();options.RequestMarshaller = DescribeReservedInstancesRequestMarshaller.Instance;options.ResponseUnmarshaller = DescribeReservedInstancesResponseUnmarshaller.Instance;return Invoke<DescribeReservedInstancesResponse>(request, options);}