docs: public Set<Integer> getPartitionGroupPeersContainHighestPid() {
          // find highest partition
          int hPid = getPartitionCount() -1;
  
          // find the host that contains the highest partition
          Collection<Integer> hHostIds = getHostIdList(hPid);
          if (hHostIds == null || hHostIds.isEmpty()) {
              return Collections.emptySet();
          }
          int hHostId = hHostIds.iterator().next();
          return getPartitionGroupPeers(hHostId);
      }