code: protected static DeliveryStreamDescription describeDeliveryStream(String deliveryStreamName) {
          DescribeDeliveryStreamRequest describeDeliveryStreamRequest = new DescribeDeliveryStreamRequest();
          describeDeliveryStreamRequest.withDeliveryStreamName(deliveryStreamName);
          DescribeDeliveryStreamResult describeDeliveryStreamResponse =
                  firehoseClient.describeDeliveryStream(describeDeliveryStreamRequest);
          return describeDeliveryStreamResponse.getDeliveryStreamDescription();
      }
docs: Method to describe the delivery stream.
  
  @param deliveryStreamName the delivery stream
  @return the delivery description