@Override
        public boolean contains(int band, int[] hashes) {
            RoaringBitmap idsBitmap = maps.get(toHex(band, hashes));
            return (idsBitmap != null && !idsBitmap.isEmpty()) ? true : false;
        }
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