async fn describe_cluster_parameters(
        &self,
        input: DescribeClusterParametersMessage,
    ) -> Result<ClusterParameterGroupDetails, RusotoError<DescribeClusterParametersError>> {
        let mut request = SignedRequest::new("POST", "redshift", &self.region, "/");
        let params = self.new_params("DescribeClusterParameters");
        let mut params = params;
        DescribeClusterParametersMessageSerializer::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, DescribeClusterParametersError::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 = ClusterParameterGroupDetailsDeserializer::deserialize(
                "DescribeClusterParametersResult",
                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 detailed list of parameters contained within the specified Amazon Redshift parameter group. For each parameter the response includes information such as parameter name, description, data type, value, whether the parameter value is modifiable, and so on.</p> <p>You can specify <i>source</i> filter to retrieve parameters of only specific type. For example, to retrieve parameters that were modified by a user action such as from <a>ModifyClusterParameterGroup</a>, you can specify <i>source</i> equal to <i>user</i>.</p> <p> For more information about parameters and parameter groups, go to <a href="https://docs.aws.amazon.com/redshift/latest/mgmt/working-with-parameter-groups.html">Amazon Redshift Parameter Groups</a> in the <i>Amazon Redshift Cluster Management Guide</i>.</p>
rusoto/services/redshift/src/generated.rs