import { ISystemClock } from './System';
export declare class AppStorageCacheToken {
    readonly key: string;
    readonly expirationTimestamp?: number | undefined;
    constructor(key: string, expirationTimestamp?: number | undefined);
    isExpired(clock: ISystemClock): boolean;
}
export interface IApplicationCacheManager {
    register(key: string, expiresIn?: number): void;
    find(key: string): AppStorageCacheToken | undefined;
    invalidate(key: string): void;
}
export declare class ApplicationCacheManager {
    static readonly instance: ApplicationCacheManager;
    readonly tokens: Record<string, AppStorageCacheToken>;
    register(key: string, expiresIn?: number): void;
    find(key: string): AppStorageCacheToken | undefined;
    invalidate(key: string): void;
}