async fn describe_load_balancer_policy_types(
        &self,
        input: DescribeLoadBalancerPolicyTypesInput,
    ) -> Result<
        DescribeLoadBalancerPolicyTypesOutput,
        RusotoError<DescribeLoadBalancerPolicyTypesError>,
    > {
        let mut request = SignedRequest::new("POST", "elasticloadbalancing", &self.region, "/");
        let params = self.new_params("DescribeLoadBalancerPolicyTypes");
        let mut params = params;
        DescribeLoadBalancerPolicyTypesInputSerializer::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, DescribeLoadBalancerPolicyTypesError::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 = DescribeLoadBalancerPolicyTypesOutputDeserializer::deserialize(
                "DescribeLoadBalancerPolicyTypesResult",
                stack,
            )?;
            skip_tree(stack);
            xml_util::end_element(actual_tag_name, stack)?;
            Ok(result)
        })
        .await?;

        drop(response); // parse non-payload
        Ok(result)
    }
<p>Describes the specified load balancer policy types or all load balancer policy types.</p> <p>The description of each type indicates how it can be used. For example, some policies can be used only with layer 7 listeners, some policies can be used only with layer 4 listeners, and some policies can be used only with your EC2 instances.</p> <p>You can use <a>CreateLoadBalancerPolicy</a> to create a policy configuration for any of these policy types. Then, depending on the policy type, use either <a>SetLoadBalancerPoliciesOfListener</a> or <a>SetLoadBalancerPoliciesForBackendServer</a> to set the policy.</p>
rusoto/services/elb/src/generated.rs