@Test
public void addNode() throws Exception {

    NodeModel<String> addNode = new NodeModel<>("add note");
    mTreeModel.addNode(mTreeModel.getRootNode(), addNode);
    mTreeModel.addForTreeItem(new ForTreeItem<NodeModel<String>>() {
        @Override
        public void next(int msg, NodeModel<String> next) {
            System.out.printf("%s>>", next.getValue());
        }
    });
    mTreeModel.ergodicTreeInWith(1);
}