text: 
  import {Transform} from '\0polyfill-node._stream_transform';
  
  import {inherits} from 'util';
  inherits(PassThrough, Transform);
  export default PassThrough;
  export function PassThrough(options) {
    if (!(this instanceof PassThrough)) return new PassThrough(options);
  
    Transform.call(this, options);
  }
  
  PassThrough.prototype._transform = function (chunk, encoding, cb) {
    cb(null, chunk);
  };
  