root = session.getLatestRoot();
Tree tree = root.getTree("/");
tree.setProperty("a", 1);
tree.setProperty("b", 2);
tree.setProperty("c", 3);
tree.addChild("x");
tree.addChild("y");
tree.addChild("z").addChild("1").addChild("2").setProperty("p", "v");
root.commit();
nullLocation = TreeLocation.create(root).getParent();