import { OnDestroy } from '@angular/core';
import * as i0 from "@angular/core";
export declare class TranslocoPersistLangService implements OnDestroy {
    private service;
    private storage;
    private config;
    private subscription;
    private storageKey;
    constructor();
    getCachedLang(): string | null;
    clear(): void;
    private updateStorageOnLangChange;
    private init;
    private setActiveLang;
    private save;
    ngOnDestroy(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<TranslocoPersistLangService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<TranslocoPersistLangService>;
}