String dataDir = Utils.getSharedDataDir(LoadingNotebook.class) + "Notebook/";
Notebook notebook = new Notebook(dataDir + "Notizbuch �ffnen.onetoc2");
      
      
for (INotebookChildNode notebookChildNode : notebook) {
	System.out.println(notebookChildNode.getDisplayName());

	if (notebookChildNode instanceof Document) {
		// Do something with child document
	} else if (notebookChildNode instanceof Notebook) {
		// Do something with child notebook
	}
}