this.mapOfRanges = mapOfRanges;
    }

    Object readResolve() {
      if (mapOfRanges.isEmpty()) {
        return of();
      } else {
        return createRangeMap();
      }
    }

    Object createRangeMap() {
      Builder<K, V> builder = new Builder<>();
      for (Entry<Range<K>, V> entry : mapOfRanges.entrySet()) {
        builder.put(entry.getKey(), entry.getValue());
      }