docs: @Override
    public UpdateSketch rebuild() {
      final int lgNomLongs = getLgNomLongs();
      final int preambleLongs = mem_.getByte(PREAMBLE_LONGS_BYTE) & 0X3F;
      if (getRetainedEntries(true) > (1 << lgNomLongs)) {
        quickSelectAndRebuild(mem_, preambleLongs, lgNomLongs);
      }
      return this;
    }