How to use twitter widgets.js with AMD

twitter.js

// Usage: require(['twitter'], function (twitter) { twitter.load() })
define(function() {
  
  var twitter = {
    load: executeWhenReady('load')
  }
  
  // Return wrapped function that will
  // be executed only when twttr is ready
  function executeWhenReady (funcName) {
    return function () {
      // save args
      var args = Array.prototype.slice.call(arguments)
      window.twttr.ready(function () {
        // call twttr.widgets with args
        window.twttr.widgets[funcName].apply(window.twttr.widgets, args)
      })
    }
  }
  
  // This is bit of code is from https://dev.twitter.com/docs/tfw-javascript
  window.twttr = (function (d,s,id) {
    var t, js, fjs = d.getElementsByTagName(s)[0];
    if (d.getElementById(id)) return; js=d.createElement(s); js.id=id;
    js.src="https://platform.twitter.com/widgets.js"; fjs.parentNode.insertBefore(js, fjs);
    return window.twttr || (t = { _e: [], ready: function(f){ t._e.push(f) } });
  }(document, "script", "twitter-wjs"));

  return twitter;

})