|  | var Stream = require('stream'); | 
|  | if (process.env.READABLE_STREAM === 'disable' && Stream) { | 
|  | module.exports = Stream.Readable; | 
|  | Object.assign(module.exports, Stream); | 
|  | module.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'); | 
|  | exports.finished = require('./lib/internal/streams/end-of-stream.js'); | 
|  | exports.pipeline = require('./lib/internal/streams/pipeline.js'); | 
|  | } |