import type { NotificationInstance, NotificationItem, NotificationsService } from './notifications.types';
declare class NotificationsServiceClass implements NotificationsService {
    #private;
    constructor();
    add(notification: NotificationItem, cb?: () => void): void | NotificationInstance;
    delete(index: number): void;
}
export declare const notificationsService: Readonly<NotificationsServiceClass>;
export {};