docs: private static long[] finalMix128(long h1, long h2, final long lengthBytes, final long[] hashOut) {
      h1 ^= lengthBytes;
      h2 ^= lengthBytes;
  
      h1 += h2;
      h2 += h1;
  
      h1 = finalMix64(h1);
      h2 = finalMix64(h2);
  
      h1 += h2;
      h2 += h1;
  
      hashOut[0] = h1;
      hashOut[1] = h2;
      return hashOut;
    }