assertFalse(rootFilter.includeAdd("a", a));
Filter aFilter = rootFilter.create("a", a, a);
assertNotNull(aFilter);
NodeState b = a.getChildNode("b");
assertFalse(aFilter.includeAdd("b", b));
Filter bFilter = aFilter.create("b", b, b);
assertNotNull(bFilter);
NodeState c = b.getChildNode("c");
assertTrue(bFilter.includeAdd("c", b));