import { NamedObservable } from "../NamedObservable";
import { LocalStorageItems, LocalStorageEvents } from "./types";
/**
 * Sets or removes data from local storage in one of the specified data format.
 * If data is set to null, then it is removed from local storage.
 * If needed, it stringify data for persistance in local storage or parse such data to be retrieved in desired format.
 */
declare class LocalStorageHandlerProxy extends NamedObservable<LocalStorageItems | LocalStorageEvents> {
    /**
     * Save string item to local storage.
     * @param name Unique key by which item is identified.
     * @param item String to be saved. If null, then item is completely removed from local storage.
     */
    protected saveItem(name: LocalStorageItems, item: string | null): void;
    /**
     * Retrieve string item from local storage.
     * @param name Unique key by which item is identified.
     */
    protected static retrieveItem(name: LocalStorageItems): string | null;
    /**
     * Stringify object and saves it to local storage.
     * @param name Unique key by which object is identified.
     * @param item Object to be saved. If null, then object is completely removed from local storage.
     */
    protected saveObject<T extends object>(name: LocalStorageItems, object: T | null): void;
    /**
     * Retrieve item from local storage and parse it as object.
     * @param name Unique key by which object is identified.
     */
    protected static retrieveObject<T extends object>(name: LocalStorageItems): T | null;
    protected clearStorage(): void;
}
export default LocalStorageHandlerProxy;