old_contents: var AV = require('leanengine');
  
  AV.Cloud.define('hello', function(req, res){console.log(req);res.success('Hello world in cloud function');})
  
  
  
new_contents: var AV = require('leanengine');
  
  AV.Cloud.define('hello', function(req, res){console.log(req);res.success('Hello world in cloud function');})
  
  module.exports = AV.Cloud;
  
subject: add module exports