export interface PersistentStorage<T> {
    setItem(key: string, value: T): boolean;
    getItem(key: string): T;
}
export declare class LocalStoragePersistentStorage<T> {
    setItem(key: string, value: T): boolean;
    getItem(key: string): T;
}
export declare const localPersistentStorage: LocalStoragePersistentStorage<any>;