@Override
        public RoaringBitmap getValues(int band, int[] hashes) {
            byte[] hashtableKey = createKey(band, hashes);
            byte[] bitmapBytes = super.get(hashtableKey);
            if (bitmapBytes == null) {
                return null;
            } else {
                return unserializeBitmap(bitmapBytes);
            }
        }
Finds the number of bands that need to be used for a given similarity threshold.

@param nHashes
@param jaccardThreshold
@return
ache/src/main/java/achecrawler/minhash/LSH.java