How to use the @jupyterlab/docmanager.PathStatus function in @jupyterlab/docmanager

activate: (
    _: JupyterFrontEnd,
    statusBar: IStatusBar,
    docManager: IDocumentManager,
    labShell: ILabShell
  ) => {
    const path = new PathStatus({ docManager });

    // Keep the file path widget up-to-date with the application active widget.
    path.model!.widget = labShell.currentWidget;
    labShell.currentChanged.connect(() => {
      path.model!.widget = labShell.currentWidget;
    });

    statusBar.registerStatusItem(pathStatusPlugin.id, {
      item: path,
      align: 'right',
      rank: 0,
      isActive: () => true
    });
  }
};

activate: (
    _: JupyterFrontEnd,
    statusBar: IStatusBar,
    docManager: IDocumentManager,
    labShell: ILabShell
  ) => {
    const path = new PathStatus({ docManager });

    // Keep the file path widget up-to-date with the application active widget.
    path.model!.widget = labShell.currentWidget;
    labShell.currentChanged.connect(() => {
      path.model!.widget = labShell.currentWidget;
    });

    statusBar.registerStatusItem(pathStatusPlugin.id, {
      item: path,
      align: 'right',
      rank: 0,
      isActive: () => true
    });
  }
};