docs: public static String jsonifyClusterTrackers(Pair<Long, Long> lastConsumerUniqueIds,
                                                  Map<Integer, Map<Integer, DRSiteDrIdTracker>> allProducerTrackers)
      throws JSONException {
          JSONStringer stringer = new JSONStringer();
          stringer.object();
          stringer.keySymbolValuePair("lastConsumerSpUniqueId", lastConsumerUniqueIds.getFirst());
          stringer.keySymbolValuePair("lastConsumerMpUniqueId", lastConsumerUniqueIds.getSecond());
          stringer.key("trackers").object();
          if (allProducerTrackers != null) {
              for (Map.Entry<Integer, Map<Integer, DRSiteDrIdTracker>> clusterTrackers : allProducerTrackers.entrySet()) {
                  stringer.key(Integer.toString(clusterTrackers.getKey())).object();
                  for (Map.Entry<Integer, DRSiteDrIdTracker> e : clusterTrackers.getValue().entrySet()) {
                      stringer.key(e.getKey().toString());
                      stringer.value(e.getValue().toJSON());
                  }
                  stringer.endObject();
              }
          }
          stringer.endObject();
          stringer.endObject();
          return stringer.toString();
      }