void (boolean showLoadingNode, @NotNull GroupModel model) { new AsyncTest(showLoadingNode, model).start(test -> testPathState(test.tree, " +root\n node\n", () -> testNodePreserving(test, model, "first", () -> testNodePreserving(test, model, "second", () -> testNodePreserving(test, model, null, () -> testNodePreserving(test, model, "third", test::done))))), 10); }