type IListener = (value: unknown) => void;
interface IStorage {
    get: (key: string) => unknown | null;
    set: (key: string, value: unknown) => unknown | null;
    watch: (key: string, callback: IListener) => void;
    unwatch: (key: string, callback?: IListener) => void;
}
declare class SessionStorage implements IStorage {
    #private;
    get(key: string): unknown | null;
    set(key: string, value: unknown): unknown | null;
    watch(key: string, callback: IListener): void;
    unwatch(key: string, callback?: IListener | undefined): void;
}
export { SessionStorage };
//# sourceMappingURL=sessionStorage.d.ts.map