it('allow explicitly binding the routing context to null to perform navigation from root', async function () {
    @customElement({ name: 'l-21', template: `l21 <a load="route:l22; context.bind:rtCtx.parent"></a>` })
    class L21 {
      private rtCtx: IRouteContext;
      public canLoad(params: Params, next: RouteNode, _current: RouteNode): boolean {