Function guard

packages/router/test/apply_redirects.spec.ts:543–546

(route: Route, urlSegments: UrlSegment[])

      let passedUrlSegments: UrlSegment[];

      const guard = (route: Route, urlSegments: UrlSegment[]) => {
        passedUrlSegments = urlSegments;
        return true;
      };

      const config = [
        {