@Override
    public void getConfig(FleetcontrollerConfig.Builder builder) {
        cluster.getConfig(builder);
        cluster.getClusterControllerConfig().getConfig(builder);
        builder.index(clusterControllerIndex);
        builder.fleet_controller_count(nodeCount);
        builder.http_port(0);
        builder.rpc_port(0);
    }
Model serving class. Wraps fleet controller config serving.
config-model/src/main/java/com/yahoo/vespa/model/admin/clustercontroller/ClusterControllerConfigurer.java