async fn describe_orderable_cluster_options(
        &self,
        input: DescribeOrderableClusterOptionsMessage,
    ) -> Result<OrderableClusterOptionsMessage, RusotoError<DescribeOrderableClusterOptionsError>>
    {
        let mut request = SignedRequest::new("POST", "redshift", &self.region, "/");
        let params = self.new_params("DescribeOrderableClusterOptions");
        let mut params = params;
        DescribeOrderableClusterOptionsMessageSerializer::serialize(&mut params, "", &input);
        request.set_payload(Some(serde_urlencoded::to_string(&params).unwrap()));
        request.set_content_type("application/x-www-form-urlencoded".to_owned());

        let response = self
            .sign_and_dispatch(request, DescribeOrderableClusterOptionsError::from_response)
            .await?;

        let mut response = response;
        let result = xml_util::parse_response(&mut response, |actual_tag_name, stack| {
            xml_util::start_element(actual_tag_name, stack)?;
            let result = OrderableClusterOptionsMessageDeserializer::deserialize(
                "DescribeOrderableClusterOptionsResult",
                stack,
            )?;
            skip_tree(stack);
            xml_util::end_element(actual_tag_name, stack)?;
            Ok(result)
        })
        .await?;

        drop(response); // parse non-payload
        Ok(result)
    }
<p>Returns a list of orderable cluster options. Before you create a new cluster you can use this operation to find what options are available, such as the EC2 Availability Zones (AZ) in the specific AWS Region that you can specify, and the node types you can request. The node types differ by available storage, memory, CPU and price. With the cost involved you might want to obtain a list of cluster options in the specific region and specify values when creating a cluster. For more information about managing clusters, go to <a href="https://docs.aws.amazon.com/redshift/latest/mgmt/working-with-clusters.html">Amazon Redshift Clusters</a> in the <i>Amazon Redshift Cluster Management Guide</i>.</p>
rusoto/services/redshift/src/generated.rs