import { ActivatedRouteSnapshot } from './router_state';
/**
 * @whatItDoes Represents the detached route tree.
 *
 * This is an opaque value the router will give to a custom route reuse strategy
 * to store and retrieve later on.
 *
 * @experimental
 */
export declare type DetachedRouteHandle = {};
/**
 * @whatItDoes Provides a way to customize when activated routes get reused.
 *
 * @experimental
 */
export declare abstract class RouteReuseStrategy {
    /** Determines if this route (and its subtree) should be detached to be reused later */
    abstract shouldDetach(route: ActivatedRouteSnapshot): boolean;
    /** Stores the detached route */
    abstract store(route: ActivatedRouteSnapshot, handle: DetachedRouteHandle): void;
    /** Determines if this route (and its subtree) should be reattached */
    abstract shouldAttach(route: ActivatedRouteSnapshot): boolean;
    /** Retrieves the previously stored route */
    abstract retrieve(route: ActivatedRouteSnapshot): DetachedRouteHandle;
    /** Determines if a route should be reused */
    abstract shouldReuseRoute(future: ActivatedRouteSnapshot, curr: ActivatedRouteSnapshot): boolean;
}