class DefaultTopology extends AbstractModel implements Topology {

    public Set<Path> getPaths(DeviceId src, DeviceId dst) {
        return getPaths(src, dst, linkWeight());
    }

    public  DefaultTopology(ProviderId providerId, GraphDescription description,
                           Function<ConnectPoint, Boolean> broadcastFunction);
    public  DefaultTopology(ProviderId providerId, GraphDescription description);

}