@Override
    public List<String> identifyResources(HelixClusterManager helixClusterManager) {
      String dcName = helixClusterManager.clusterMapConfig.clusterMapDatacenterName;
      return new ArrayList<>(helixClusterManager.dcToResourceNameToTag.get(dcName).keySet());
    }
Return all the resource names this cluster map has.
@param helixClusterManager
@return
ambry-clustermap/src/main/java/com/github/ambry/clustermap/HelixClusterManager.java