How to use the @pebula/ngrid/overlay-panel.PblNgridOverlayPanelComponentExtension function in @pebula/ngrid

constructor(@Optional() @SkipSelf() parentModule: PblNgridContextMenuModule,
              registry: PblNgridRegistryService,
              cfr: ComponentFactoryResolver,
              configService: PblNgridConfigService) {
    if (parentModule) {
      return;
    }
    registry.addMulti('dataHeaderExtensions', new MatHeaderContextMenuExtension(cfr));
    registry.addMulti('overlayPanels', new PblNgridOverlayPanelComponentExtension('excelMenu', MatExcelStyleHeaderMenu, cfr));
  }
}