I could do with having a method in DRM like this:

public List<ClusterNode> lookupReplicantsNodes(String key);

and deprecate lookupReplicantsNodeNames() as it returns a List of String names, which could
still be accessible via ClusterNode.getName(). Otherwise, building a List of ClusterNode from,
for example. the singleton service name is inefficient. I have to take the singleton name, look
up the List of Cluster Node names, and with that list, take ClusterNode list from the partition and
match them to create a brand new ClusterNode list with the nodes where the singleton are
running. ugh