import { CanActivateFn } from "@angular/router";
/**
 * A guard that checks if the user is signed in.
 * If the user is signed in, it redirects to the default route.
 * If the user is not signed in, it allows access to the route.
 * @returns An Observable<boolean> indicating whether the user is signed in or not.
 */
export declare const signedInGuard: CanActivateFn;