// Take lock to access and update the heal-sequence
	h.mutex.Lock()
	defer h.mutex.Unlock()

	numItems := len(h.currentStatus.Items)

	// calculate index of most recently available heal result
	// record.
	lastResultIndex := h.lastSentResultIndex
	if numItems > 0 {
		lastResultIndex = h.currentStatus.Items[numItems-1].ResultIndex
	}

	h.lastSentResultIndex = lastResultIndex

     */
    long numBits = optimalNumOfBits(expectedInsertions, fpp);
    int numHashFunctions = optimalNumOfHashFunctions(expectedInsertions, numBits);
    try {
      return new BloomFilter<>(new LockFreeBitArray(numBits), numHashFunctions, funnel, strategy);
    } catch (IllegalArgumentException e) {
      throw new IllegalArgumentException("Could not create BloomFilter of " + numBits + " bits", e);
    }
  }