private static final int CHUNK_SIZE = 16;
    private static final long C1 = 0x87c37b91114253d5L;
    private static final long C2 = 0x4cf5ad432745937fL;
    private long h1;
    private long h2;
    private int length;

    Murmur3_128Hasher(int seed) {
      super(CHUNK_SIZE);
      this.h1 = seed;
      this.h2 = seed;
      this.length = 0;
    }

    private long finalM = 0;

    SipHasher(int c, int d, long k0, long k1) {
      super(CHUNK_SIZE);
      this.c = c;
      this.d = d;
      this.v0 ^= k0;
      this.v1 ^= k1;
      this.v2 ^= k0;
      this.v3 ^= k1;
    }

    @Override
    protected void process(ByteBuffer buffer) {
      b += CHUNK_SIZE;
      processM(buffer.getLong());
    }

    @Override