docs: private Map<Address, IntSet> backupOwnersOfSegments(ConsistentHash ch, IntSet segments) {
        Map<Address, IntSet> map = new HashMap<>(ch.getMembers().size());
        if (ch.isReplicated()) {
           for (Address member : ch.getMembers()) {
              map.put(member, segments);
           }
           map.remove(rpcManager.getAddress());
        } else {
           int numSegments = ch.getNumSegments();
           for (PrimitiveIterator.OfInt iter = segments.iterator(); iter.hasNext(); ) {
              int segment = iter.nextInt();
              List<Address> owners = ch.locateOwnersForSegment(segment);
              for (int i = 1; i < owners.size(); ++i) {
                 map.computeIfAbsent(owners.get(i), o -> IntSets.mutableEmptySet(numSegments)).set(segment);
              }
           }
        }
        return map;
     }