old_contents: // Passing arguments to particular functions in waterfall
  var copyFile = pf.waterfall(
      1, fs.readFile,
      1, fs.writeFile
  )
  
  var copyFile = pf.waterfall(
      0, fs.readFile,
      1, fs.writeFile
  )
  
  var copyFile = pf.waterfall(
      fs.readFile, 1,
      fs.writeFile, 1
  )
  
  var copyFile = pf.waterfall(
      [fs.readFile, 1],
      [fs.writeFile, 1]
  )
  
  var copyFile = pf.waterfall(1, fs.readFile, 1, fs.writeFile)
  var copyFile = pf.waterfall(fs.readFile, 1, fs.writeFile, 1)
  var copyFile = pf.waterfall([fs.readFile, 1], [fs.writeFile, 1])
  
  var copyFile = pf.waterfall(
      'from', fs.readFile,
      'to', fs.writeFile
  )
  
  var copyFile = pf.waterfall(
      fs.readFile, 'from',
      fs.writeFile, 'from'
  )
  
  var copyFile = pf.waterfall(
      pf.arity(fs.readFile, 1),
      pf.arity(fs.writeFile, 1)
  )
  
  
new_contents:     async.each(_.keys(JOBS), pf.handle(shutdownJob, function (err) {
          debug('Job %d shut down: %s', job_id, err ? err.stack || err : 'OK');
          callback();
      }), function () {
          debug('Queue is shut down.');
          process.exit();
      })
  
  // Passing arguments to particular functions in waterfall
  var copyFile = pf.waterfall(
      1, fs.readFile,
      1, fs.writeFile
  )
  
  var copyFile = pf.waterfall(
      0, fs.readFile,
      1, fs.writeFile
  )
  
  var copyFile = pf.waterfall(
      fs.readFile, 1,
      fs.writeFile, 1
  )
  
  var copyFile = pf.waterfall(
      [fs.readFile, 1],
      [fs.writeFile, 1]
  )
  
  var copyFile = pf.waterfall(1, fs.readFile, 1, fs.writeFile)
  var copyFile = pf.waterfall(fs.readFile, 1, fs.writeFile, 1)
  var copyFile = pf.waterfall([fs.readFile, 1], [fs.writeFile, 1])
  
  var copyFile = pf.waterfall(
      'from', fs.readFile,
      'to', fs.writeFile
  )
  
  var copyFile = pf.waterfall(
      fs.readFile, 'from',
      fs.writeFile, 'from'
  )
  
  var copyFile = pf.waterfall(
      pf.arity(fs.readFile, 1),
      pf.arity(fs.writeFile, 1)
  )
  
  
subject: Add handle scratchpad