code: public void add(Info<T, R> info) {
          String hash = GeoHash.encodeHash(info.lat(), info.lon());
  
          addToMap(mapByGeoHash, info, hash);
          addToMapById(mapById, info, hash);
      }
docs: Adds a record to the in-memory store with the given position, time and
  id.
  
  @param info
  info record to add