import { Event } from './event';
/**
 * A Relay is an event forwarder which functions as a replugabble event pipe.
 * Once created, you can connect an input event to it and it will simply forward
 * events from that input event through its own `event` property. The `input`
 * can be changed at any point in time.
 */
export declare class Relay<T> {
    private listening;
    private inputEvent;
    private inputEventUnsub;
    private readonly emitter;
    readonly event: Event<T>;
    set input(event: Event<T>);
    dispose(): void;
}