class NotificationLoadBalanceListener extends AbstractLoadBalanceListener {
    private static final Logger LOG = LoggerFactory.getLogger(NotificationLoadBalanceListener.class);

    @Override
    public void onGetServers(String serviceId, List<? extends Server> servers) {<FILL_FUNCTION_BODY>}

    @Override
    public int getOrder() {
        return LOWEST_PRECEDENCE;
    }
}

        if (servers.size() == 0) {
            LOG.warn("********** No server instances found for serviceId={}, perhaps they are isolated, filtered or not registered **********", serviceId);
        }
    
<methods>public non-sealed void <init>() <variables>