text: public virtual DescribeDeliveryStreamResponse DescribeDeliveryStream(DescribeDeliveryStreamRequest request){var options = new InvokeOptions();options.RequestMarshaller = DescribeDeliveryStreamRequestMarshaller.Instance;options.ResponseUnmarshaller = DescribeDeliveryStreamResponseUnmarshaller.Instance;return Invoke<DescribeDeliveryStreamResponse>(request, options);}