import type { IEmitter, ISubject, ISubscription, IUnsubscriber } from "./types";
import Observable from "./Observable";
export default class Subject<T> extends Observable<T> implements ISubject<T> {
	protected keyCounter: number;
	protected subscribers: Map<number, IEmitter<T>>;
	constructor();
	next(value: T): void;
	error(value: T): void;
	protected _subscribe(emitter: IEmitter<T>): IUnsubscriber | ISubscription | void;
}