final Model m = ModelFactory.createDefaultModel();
final RDFNode S = m.createResource();
final RDFNode P = m.createProperty("eh:PP");
final RDFNode O = m.createLiteral("LL");
/* */
final RDFVisitor rv = new RDFVisitor() {
@Override
public Object visitBlank( final Resource R, final AnonId id )
{
history.add("blank");
Assert.assertTrue("must visit correct node", R == S);