docs: public static List<Long> childrenToReplicaHSIds(Collection<String> children)
      {
          List<Long> replicas = new ArrayList<Long>(children.size());
          for (String child : children) {
              long HSId = Long.parseLong(CoreZK.getPrefixFromChildName(child));
              replicas.add(HSId);
          }
          return replicas;
      }