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// deno-fmt-ignore-file// deno-lint-ignore-file
// Copyright Joyent and Node contributors. All rights reserved. MIT license.// Taken from Node 18.12.0// This file is automatically generated by "node/_tools/setup.ts". Do not modify this file manually
'use strict';const { Duplex } = require('stream');const assert = require('assert');
const kCallback = Symbol('Callback');const kOtherSide = Symbol('Other');
class DuplexSocket extends Duplex {  constructor() {    super();    this[kCallback] = null;    this[kOtherSide] = null;  }
  _read() {    const callback = this[kCallback];    if (callback) {      this[kCallback] = null;      callback();    }  }
  _write(chunk, encoding, callback) {    assert.notStrictEqual(this[kOtherSide], null);    assert.strictEqual(this[kOtherSide][kCallback], null);    if (chunk.length === 0) {      process.nextTick(callback);    } else {      this[kOtherSide].push(chunk);      this[kOtherSide][kCallback] = callback;    }  }
  _final(callback) {    this[kOtherSide].on('end', callback);    this[kOtherSide].push(null);  }}
function makeDuplexPair() {  const clientSide = new DuplexSocket();  const serverSide = new DuplexSocket();  clientSide[kOtherSide] = serverSide;  serverSide[kOtherSide] = clientSide;  return { clientSide, serverSide };}
module.exports = makeDuplexPair;