old_contents: var cote = require('cote');
  
  var hostname = require('os').hostname();
  var source = `time-service@${hostname}`;
  
  var timeResponder = new cote.Responder({
      name: 'Time Responder'
  });
  
  timeResponder.on('time', function(req, cb) {
      var time = new Date();
      var reply = {source, time};
  
      console.log(reply);
      cb(reply);
  });
  
new_contents: var cote = require('cote');
  
  var hostname = require('os').hostname();
  var source = `time-service@${hostname}`;
  
  var timeResponder = new cote.Responder({
      name: 'Time Responder'
  });
  
  timeResponder.on('time', function(req, cb) {
      var time = new Date();
      var reply = {source, time, rand: Math.random()};
  
      console.log(reply);
      cb(reply);
  });
  
subject: Add random message