docs: private final void forceRebuildDirtyCache() {
      final long[] tgtArr = new long[1 << lgArrLongs_];
      curCount_ = HashOperations.hashArrayInsert(cache_, tgtArr, lgArrLongs_, thetaLong_);
      cache_ = tgtArr;
      dirty_ = false;
      //hashTableThreshold stays the same
    }