import { Observable } from 'rxjs';
export interface StorageServiceInterface {
    /**
     * Return a subject what represent a localstorage item. If you call StorageService's
     * `setItem()`, `removeItem()` or `clear()`, then localstorage item will be handled
     * and the observers will be notified too.
     */
    watchStorage(): Observable<any>;
    /**
     * Set an item in the localstorage and notifiy observers.
     *
     * @param key localstorage item's key
     * @param data localstorage item's data as string
     */
    setItem(key: string, data: any): void;
    /**
     * Remove an item from the localstorage and notifiy observers.
     *
     * @param key localstorage item's key
     */
    removeItem(key: any): void;
    /**
     * Clear localstorage and notifiy observers.
     */
    clear(): void;
}
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