async fn set_load_balancer_policies_for_backend_server(
        &self,
        input: SetLoadBalancerPoliciesForBackendServerInput,
    ) -> Result<
        SetLoadBalancerPoliciesForBackendServerOutput,
        RusotoError<SetLoadBalancerPoliciesForBackendServerError>,
    > {
        let mut request = SignedRequest::new("POST", "elasticloadbalancing", &self.region, "/");
        let params = self.new_params("SetLoadBalancerPoliciesForBackendServer");
        let mut params = params;
        SetLoadBalancerPoliciesForBackendServerInputSerializer::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,
                SetLoadBalancerPoliciesForBackendServerError::from_response,
            )
            .await?;

        let result = SetLoadBalancerPoliciesForBackendServerOutput::default();

        drop(response); // parse non-payload
        Ok(result)
    }
<p>Replaces the set of policies associated with the specified port on which the EC2 instance is listening with a new set of policies. At this time, only the back-end server authentication policy type can be applied to the instance ports; this policy type is composed of multiple public key policies.</p> <p>Each time you use <code>SetLoadBalancerPoliciesForBackendServer</code> to enable the policies, use the <code>PolicyNames</code> parameter to list the policies that you want to enable.</p> <p>You can use <a>DescribeLoadBalancers</a> or <a>DescribeLoadBalancerPolicies</a> to verify that the policy is associated with the EC2 instance.</p> <p>For more information about enabling back-end instance authentication, see <a href="https://docs.aws.amazon.com/elasticloadbalancing/latest/classic/elb-create-https-ssl-load-balancer.html#configure_backendauth_clt">Configure Back-end Instance Authentication</a> in the <i>Classic Load Balancers Guide</i>. For more information about Proxy Protocol, see <a href="https://docs.aws.amazon.com/elasticloadbalancing/latest/classic/enable-proxy-protocol.html">Configure Proxy Protocol Support</a> in the <i>Classic Load Balancers Guide</i>.</p>
rusoto/services/elb/src/generated.rs