/// <reference types="node" />
import { PassThrough, TransformOptions } from 'stream';
export interface FunnelOptions extends TransformOptions {
    maxListeners?: number;
    name?: string;
}
export default class Funnel extends PassThrough {
    private static id;
    private numSources;
    private name;
    constructor(options: FunnelOptions);
    toString(): string;
    addSource(source: NodeJS.ReadableStream, waitForEnd?: boolean): void;
    addSources(sources: NodeJS.ReadableStream[], waitForEnd?: boolean): void;
    sourceFinished(source: NodeJS.ReadableStream): void;
}