### Question:
AclBinding { public AclBindingFilter toFilter() { return new AclBindingFilter(resource.toFilter(), entry.toFilter()); } AclBinding(Resource resource, AccessControlEntry entry); boolean isUnknown(); Resource resource(); final AccessControlEntry entry(); AclBindingFilter toFilter(); @Override String toString(); @Override boolean equals(Object o); @Override int hashCode();  }### Answer:
@Test public void testMatchesAtMostOne() throws Exception { assertEquals(null, ACL1.toFilter().findIndefiniteField()); assertEquals(null, ACL2.toFilter().findIndefiniteField()); assertEquals(null, ACL3.toFilter().findIndefiniteField()); assertFalse(ANY_ANONYMOUS.matchesAtMostOne()); assertFalse(ANY_DENY.matchesAtMostOne()); assertFalse(ANY_MYTOPIC.matchesAtMostOne()); }