private static long fmix64(long h) {
        h ^= (h >>> 33);
        h *= 0xff51afd7ed558ccdL;
        h ^= (h >>> 33);
        h *= 0xc4ceb9fe1a85ec53L;
        h ^= (h >>> 33);
        return h;
    }
Murmur3 128-bit variant.

@param data   - input byte array
@param offset - the first element of array
@param length - length of array
@param seed   - seed. (default is 0)
@return - hashcode (2 longs)
streams/src/main/java/org/apache/kafka/streams/state/internals/Murmur3.java