import { EventCallback, PublisherProps } from './_types';
export declare class Publisher {
    private eventData;
    private addEventListener;
    private removeEventListener;
    constructor(...args: PublisherProps);
    subscribe: (eventName: string, eventCallback: EventCallback<{}>, subscriberInstance?: Record<string | number | symbol, unknown> | undefined) => () => void;
    unsubscribeAll: () => void;
    eventSubscribersCount: (eventName: string) => number;
    subscribersCount: () => number;
    private getEventData;
    private getEventCallback;
    private getSubscribers;
    private buildInformSubscribers;
    private unsubscribe;
    private observeEvent;
    private unobserveEvent;
}