var Stream = require('stream'); if (process.env.READABLE_STREAM === 'disable' && Stream) { module.exports = Stream; exports = module.exports = Stream.Readable; exports.Readable = Stream.Readable; exports.Writable = Stream.Writable; exports.Duplex = Stream.Duplex; exports.Transform = Stream.Transform; exports.PassThrough = Stream.PassThrough; exports.Stream = Stream; } else { exports = module.exports = require('./lib/_stream_readable.js'); exports.Stream = Stream || exports; exports.Readable = exports; exports.Writable = require('./lib/_stream_writable.js'); exports.Duplex = require('./lib/_stream_duplex.js'); exports.Transform = require('./lib/_stream_transform.js'); exports.PassThrough = require('./lib/_stream_passthrough.js'); }