export declare class StorageService {
    private _storage;
    private _prefix;
    constructor(_storage: Storage, prefix: string);
    clear(): void;
    get(key: string): any;
    remove(key: string): void;
    set(key: string, value: any): void;
}
export declare class LocalStorageService extends StorageService {
    private static _instances;
    private constructor(prefix);
    static Instance(prefix: string): LocalStorageService;
}
export declare class SessionStorageService extends StorageService {
    private static _instances;
    private constructor(prefix);
    static Instance(prefix: string): LocalStorageService;
}