class CandidateOspfTopology {

  @Nonnull
  public Set<OspfNeighborConfigId> neighbors(OspfNeighborConfigId node) {
    if (!_graph.nodes().contains(node)) {
      return ImmutableSet.of();
    }
    return _graph.adjacentNodes(node);
  }

  public  CandidateOspfTopology(ValueGraph<OspfNeighborConfigId, OspfSessionStatus> graph);

}