ImmutableTree t = tree;
for(int c = 0; c < 2; c++) {
for(String name : elements("r/s/t/u")) {
t = t.getChild(name);
assertFalse(filter.includeAdd(name, t.getNodeState()));
filter = filter.create(name, t.getNodeState(), t.getNodeState());
assertNotNull(filter);
}
t = t.getChild("v");