import { Observable } from './observable.js';
import { IObservable, IObserver } from './types.js';
export declare class Behavior<T> extends Observable<T> implements IObservable<T>, IObserver<T> {
    private _emitters;
    started: boolean;
    value: T;
    constructor();
    next(val: T): void;
    error(err: Error): void;
    complete(val: any): void;
}