contentNode.setProperty("jcr:lastModified", session.getValueFactory().createValue(Calendar.getInstance()));
session.save();
ItemVisitor visitor = new MockVisitor();
contentNode.accept(visitor);
contentNode.getProperty("jcr:data").accept(visitor);
visitor = new MockVisitor2();
root.getNode("childNode").accept(visitor);
assertEquals(((MockVisitor2)visitor).getI(), ((MockVisitor2)visitor).getJ());