import { Observable } from 'rxjs';
import { HashManager } from './Interfaces';
export declare class HistoryStateHashManager implements HashManager {
    protected readonly fallbackManager: HashManager;
    private changeHash;
    constructor(fallbackManager: HashManager);
    updateHash(hash: string, state: {}, title: string, replace: boolean): void;
    readonly hashChanged: Observable<string>;
}
export declare const nullHashManager: HashManager;
export declare const windowLocationHashManager: HashManager | undefined;
export declare const historyStateHashManager: HistoryStateHashManager;