assertFalse(bf1.isCompatible(bf1));
    assertThrows(
        IllegalArgumentException.class,
        () -> {
          bf1.putAll(bf1);
        });
  }

  public void testJavaSerialization() {
    BloomFilter<byte[]> bf = BloomFilter.create(Funnels.byteArrayFunnel(), 100);
    for (int i = 0; i < 10; i++) {
      bf.put(Ints.toByteArray(i));
    }