@Override
    public DescribeListenersResult describeListeners(DescribeListenersRequest request) {
        request = beforeClientExecution(request);
        return executeDescribeListeners(request);
    }
<p>
Describes the specified listeners or the listeners for the specified Application Load Balancer, Network Load
Balancer, or Gateway Load Balancer. You must specify either a load balancer or one or more listeners.
</p>

@param describeListenersRequest
@return Result of the DescribeListeners operation returned by the service.
@throws ListenerNotFoundException
        The specified listener does not exist.
@throws LoadBalancerNotFoundException
        The specified load balancer does not exist.
@throws UnsupportedProtocolException
        The specified protocol is not supported.
@sample AmazonElasticLoadBalancing.DescribeListeners
@see <a href="http://docs.aws.amazon.com/goto/WebAPI/elasticloadbalancingv2-2015-12-01/DescribeListeners"
     target="_top">AWS API Documentation</a>
aws-java-sdk-elasticloadbalancingv2/src/main/java/com/amazonaws/services/elasticloadbalancingv2/AmazonElasticLoadBalancingClient.java