public ServerListUpdater getServerListUpdater() {
        return serverListUpdater;
    }
A LoadBalancer that has the capabilities to obtain the candidate list of
servers using a dynamic source. i.e. The list of servers can potentially be
changed at Runtime. It also contains facilities wherein the list of servers
can be passed through a Filter criteria to filter out servers that do not
meet the desired criteria.

@author stonse
ribbon-loadbalancer/src/main/java/com/netflix/loadbalancer/DynamicServerListLoadBalancer.java