public PathNavigatorsTestCase() {
    super();

    MockNode root = addRoot("type1");
    root.addChild("name11");
    root.addChild("name12").addChild("type2").addChild("child21");
  }
 protected MockNode removeRoot(String name) {
   return root.remove(name);
 }
 protected MockNode addRoot(String name) {
   return root.addChild(name);
 }