import { AngularDataContext } from '@themost/angular';
import { InjectionToken } from '@angular/core';
import * as i0 from "@angular/core";
export declare interface UserStorageInterface {
    localStorage: boolean;
    sessionStorage: boolean;
}
export declare const USER_STORAGE: InjectionToken<UserStorageInterface>;
export declare class FallbackUserStorageService {
    private _context;
    private userStorage?;
    private _useSessionStorage;
    private _useLocalStorage;
    private _hasUserStorage;
    private _userStorageService;
    private _localUserStorage;
    private _sessionUserStorage;
    constructor(_context: AngularDataContext, userStorage?: UserStorageInterface);
    get userLocalStorage(): boolean;
    set userLocalStorage(useLocal: boolean);
    get userSessionStorage(): boolean;
    set userSessionStorage(useSession: boolean);
    getItem(key: string): Promise<any>;
    setItem(key: string, value: string): Promise<any>;
    removeItem(key: string): Promise<any>;
    static ɵfac: i0.ɵɵFactoryDeclaration<FallbackUserStorageService, [null, { optional: true; }]>;
    static ɵprov: i0.ɵɵInjectableDeclaration<FallbackUserStorageService>;
}