docs: static final int coupon16(final byte[] identifier) {
      final long[] hash = MurmurHash3.hash(identifier, SEED);
      final int hllIdx = (int) (((hash[0] >>> 1) % 1024) & TEN_BIT_MASK); //hash[0] for 10-bit address
      final int lz = Long.numberOfLeadingZeros(hash[1]);
      final int value = (lz > 62 ? 62 : lz) + 1;
      return (value << 10) | hllIdx;
    }