text: 'use strict'
  /**
   * Expose stream1 and stream3 as Duplex stream for endusers
   */
  const { createGzip } = require('zlib');
  const { createCipher } = require('crypto');
  const pumpify = require('pumpify');
  const base64 = require('base64-encode-stream');
  
  function pipeline () {
    const stream1 = createGzip();
    const stream2 = createCipher('aes192', 'secretz');
    const stream3 = base64();
    return pumpify(stream1, stream2, stream3);
  }
  
  const pipe = pipeline();
  
  pipe.end('written to stream1');
  
  pipe.on('data', (data) => {
    console.log('stream3 says: ', data.toString())
  });
  
  pipe.on('finish', () => {
    console.log('all data was successfully flushed to stream3')
  });
  