@Override
  protected Set<String> getPKPropertyIds() {
    return pkPropertyIds;
  }
Adds requested entities to resources
@param resources a list of resources to add to
@param requestedEntities requested entities
@param requestedIds
@param clusterName name of cluster or null if no any
ambari-server/src/main/java/org/apache/ambari/server/controller/internal/HostStackVersionResourceProvider.java