private final AtomicReference<File> file = new AtomicReference<>();
private final AtomicReference<URL> url = new AtomicReference<>();
private final AtomicReference<NodeRef> nodeRef = new AtomicReference<>();
private final AtomicReference<File> file = new AtomicReference<>();
private final AtomicReference<URL> url = new AtomicReference<>();
private final AtomicReference<NodeRef> nodeRef = new AtomicReference<>();