Harmony-proxy shims the new-style new Proxy(target, handler) API via the
old-style Proxy.create(handler) API provided by node --harmony-proxies.
See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Old_Proxy_API and https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy
$ npm install harmony-proxy
var Proxy = require('harmony-proxy');LGPLv3