/// <reference types="node" />
import { EventEmitter } from 'events';
import * as pull from 'pull-stream';
export interface DumpDuplexOptions {
    watch: boolean;
}
export declare class DumpDuplex extends EventEmitter implements pull.Duplex<any, any> {
    private _source;
    private _sink;
    private _askEnd;
    private _sourceEnded;
    private _sinkEnded;
    private _rawSinkRead;
    private _sourceReadCount;
    private _sourceCbs;
    private _sinkCbs;
    private _dumpStream;
    private _watch;
    private _syncSent;
    private _syncReceived;
    constructor(dumpStream: pull.Sink<any>, opts: Partial<DumpDuplexOptions>);
    get source(): pull.Source<any>;
    get sink(): pull.Sink<any>;
    end(end?: pull.Abort): void;
    private sourceDrain;
}