import { Callback, Observer, Unsub } from "./abstractions";
declare type Dict = {
    [key: string]: any;
};
export declare class Dispatcher<E extends Dict> {
    private _observers;
    private _count;
    private _ended;
    dispatch<X extends keyof E & string>(key: X, value: E[X]): void;
    dispatchEnd<X extends keyof E & string>(key: X): void;
    on<X extends keyof E & string>(key: X, onValue: Observer<E[X]>, onEnd?: Observer<void>): Unsub;
    onObserverCount(subscriber: Observer<number>): Callback;
    hasObservers(): boolean;
}
export {};