@Override
    public SetLoadBalancerPoliciesForBackendServerResult setLoadBalancerPoliciesForBackendServer(SetLoadBalancerPoliciesForBackendServerRequest request) {
        request = beforeClientExecution(request);
        return executeSetLoadBalancerPoliciesForBackendServer(request);
    }
<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>

@param setLoadBalancerPoliciesForBackendServerRequest
       Contains the parameters for SetLoadBalancerPoliciesForBackendServer.
@return Result of the SetLoadBalancerPoliciesForBackendServer operation returned by the service.
@throws LoadBalancerNotFoundException
        The specified load balancer does not exist.
@throws PolicyNotFoundException
        One or more of the specified policies do not exist.
@throws InvalidConfigurationRequestException
        The requested configuration change is not valid.
@sample AmazonElasticLoadBalancing.SetLoadBalancerPoliciesForBackendServer
@see <a
     href="http://docs.aws.amazon.com/goto/WebAPI/elasticloadbalancing-2012-06-01/SetLoadBalancerPoliciesForBackendServer"
     target="_top">AWS API Documentation</a>
aws-java-sdk-elasticloadbalancing/src/main/java/com/amazonaws/services/elasticloadbalancing/AmazonElasticLoadBalancingClient.java