import { Subscriber, Subscription } from './checkers';
export declare class Subscribable<Payload = any> {
    subscribers: {
        index?: number;
        [key: number]: Subscriber<Payload>;
    };
    subscription: Subscription<Payload>;
    subscribe: (callback?: Subscriber<Payload>) => number;
    unsubscribe: (index?: number) => void;
    notify: (payload?: Payload, silent?: boolean) => void;
}