How to use the @jupyterlab/csvviewer.CSVViewerFactory function in @jupyterlab/csvviewer

function activateCsv(
  app: JupyterFrontEnd,
  restorer: ILayoutRestorer,
  themeManager: IThemeManager,
  mainMenu: IMainMenu,
  searchregistry: ISearchProviderRegistry = null
): void {
  const factory = new CSVViewerFactory({
    name: FACTORY_CSV,
    fileTypes: ['csv'],
    defaultFor: ['csv'],
    readOnly: true
  });
  const tracker = new InstanceTracker>({
    namespace: 'csvviewer'
  });

  // The current styles for the data grids.
  let style: DataGrid.IStyle = Private.LIGHT_STYLE;
  let rendererConfig: TextRenderConfig = Private.LIGHT_TEXT_CONFIG;

  // Handle state restoration.
  restorer.restore(tracker, {
    command: 'docmanager:open',

function activateCsv(
  app: JupyterFrontEnd,
  restorer: ILayoutRestorer,
  themeManager: IThemeManager,
  mainMenu: IMainMenu,
  searchregistry: ISearchProviderRegistry = null
): void {
  const factory = new CSVViewerFactory({
    name: FACTORY_CSV,
    fileTypes: ['csv'],
    defaultFor: ['csv'],
    readOnly: true
  });
  const tracker = new WidgetTracker>({
    namespace: 'csvviewer'
  });

  // The current styles for the data grids.
  let style: DataGrid.IStyle = Private.LIGHT_STYLE;
  let rendererConfig: TextRenderConfig = Private.LIGHT_TEXT_CONFIG;

  // Handle state restoration.
  void restorer.restore(tracker, {
    command: 'docmanager:open',