import * as i0 from "@angular/core";
/**
 * Abstracts browser sessionStorage api so that it can be replaced as necessary
 */
export declare class StorageService {
    setItem(key: string, value: string): void;
    /**
     * Remove the entry associated with the `key` and return it's value
     * @param key
     */
    popItem(key: string): string | null;
    getItem(key: string): string | null;
    removeItem(key: string): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<StorageService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<StorageService>;
}