如何使用自定义控件持久化javafx树单元的值

public class CustomTreeView<T> extends TreeView<T> {
    private ObjectProperty<T> persistedValue = new SimpleObjectProperty<>();

    public ObjectProperty<T> persistedValueProperty() {
        return persistedValue;
    }

    public T getPersistedValue() {
        return persistedValue.get();
    }

    public void setPersistedValue(T value) {
        persistedValue.set(value);
    }
}

public class CustomTreeView<T> extends TreeView<T> {
    // ...

    public CustomTreeView() {
        getSelectionModel().selectedItemProperty().addListener((observable, oldValue, newValue) -> {
            if (newValue != null) {
                setPersistedValue(newValue.getValue());
            }
        });
    }

    // ...
}

public class Main extends Application {
    @Override
    public void start(Stage primaryStage) {
        CustomTreeView<String> treeView = new CustomTreeView<>();
        treeView.setRoot(new TreeItem<>("Root"));

        // 添加树节点
        TreeItem<String> node1 = new TreeItem<>("Node 1");
        TreeItem<String> node2 = new TreeItem<>("Node 2");
        treeView.getRoot().getChildren().addAll(node1, node2);

        // 设置持久化值
        treeView.setPersistedValue("Node 1");

        // 显示自定义控件
        StackPane root = new StackPane(treeView);
        primaryStage.setScene(new Scene(root, 300, 200));
        primaryStage.show();
    }

    public static void main(String[] args) {
        launch(args);
    }
}