async fn enable_availability_zones_for_load_balancer(
        &self,
        input: AddAvailabilityZonesInput,
    ) -> Result<AddAvailabilityZonesOutput, RusotoError<EnableAvailabilityZonesForLoadBalancerError>>
    {
        let mut request = SignedRequest::new("POST", "elasticloadbalancing", &self.region, "/");
        let params = self.new_params("EnableAvailabilityZonesForLoadBalancer");
        let mut params = params;
        AddAvailabilityZonesInputSerializer::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,
                EnableAvailabilityZonesForLoadBalancerError::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 = AddAvailabilityZonesOutputDeserializer::deserialize(
                "EnableAvailabilityZonesForLoadBalancerResult",
                stack,
            )?;
            skip_tree(stack);
            xml_util::end_element(actual_tag_name, stack)?;
            Ok(result)
        })
        .await?;

        drop(response); // parse non-payload
        Ok(result)
    }
<p>Adds the specified Availability Zones to the set of Availability Zones for the specified load balancer in EC2-Classic or a default VPC.</p> <p>For load balancers in a non-default VPC, use <a>AttachLoadBalancerToSubnets</a>.</p> <p>The load balancer evenly distributes requests across all its registered Availability Zones that contain instances. For more information, see <a href="https://docs.aws.amazon.com/elasticloadbalancing/latest/classic/enable-disable-az.html">Add or Remove Availability Zones</a> in the <i>Classic Load Balancers Guide</i>.</p>
rusoto/services/elb/src/generated.rs