CoreUtils.normalize(Collections.EMPTY_LIST);
IModelFactory factory = Owl.getModelFactory();
IFolder root = factory.createFolder(null, null, "Root");
IFolder folder1 = factory.createFolder(null, root, "Folder 1");
IFolder folder2 = factory.createFolder(null, root, "Folder 2");
IFolder folder3 = factory.createFolder(null, folder2, "Folder 3");
IBookMark mark1 = factory.createBookMark(null, root, new FeedLinkReference(new URI("#")), "Mark 1");
IBookMark mark2 = factory.createBookMark(null, folder1, new FeedLinkReference(new URI("#")), "Mark 2");
IBookMark mark3 = factory.createBookMark(null, folder2, new FeedLinkReference(new URI("#")), "Mark 3");
IBookMark mark4 = factory.createBookMark(null, folder3, new FeedLinkReference(new URI("#")), "Mark 4");