private static void assertHash(int expected, HashCode actual) {
    assertEquals(HashCode.fromInt(expected), actual);
  }
  public void testParanoid() {
    HashFn hf = new HashFn() {
      @Override public byte[] hash(byte[] input, int seed) {
        Hasher hasher = murmur3_32(seed).newHasher();
        Funnels.byteArrayFunnel().funnel(input, hasher);
        return hasher.hash().asBytes();
      }