UA plugins with GTM

pre-ga tag.HTML

<script>
(function(i,s,o,g,r,a,m){ // Modified UA function to pre-set 'ga' queue forming. 
 
  var ga2fb = function(tracker) {   // plugin constructor
    this.tracker = tracker;
    console.log('hello from constructor');
    // Copy the original hit dispatch function
    var originalSendHitTask = this.tracker.get('sendHitTask');
    // Modify the existing hit dispatcher to log a copy of the hit
    this.tracker.set('sendHitTask', function(model) {
      originalSendHitTask(model); // Send the original hit as usual
      console.log(model.get('hitPayload'));
    });
  };

  i['GoogleAnalyticsObject']= r;
  if (!i[r]) { // check if actual 'ga' oject is not instatinated
  	i[r]= function() {
 	  var queue = (i[r].q=i[r].q||[]); // modifying que
      queue.push(arguments);
      var args = [].slice.call(arguments);
      if (arguments[0] == 'create') {
        var argumentor = function () {
  	    return arguments;
	    };
        var trackerName = args.find(function(elm) {return elm.hasOwnProperty('name')}).name;
        queue.push(argumentor((trackerName + '.require'), 'ga2fb'));
        queue.push(argumentor('provide', 'ga2fb', ga2fb));
        console.log('hello from hack. got "create" in pushes');
        console.log(queue);
      }
    }, i[r].l=1*new Date();
  } else { // resetting 'create' method for existing ga object to call 'require' after set
     var originalGaCreate = i[r].create;
       i[r].create = function () {
       originalGaCreate.apply(this, arguments);
       var args = [].slice.apply(arguments);
       var trackerName = args.find(function(elm) {return elm.hasOwnProperty('name')}).name;
       var self = this;
       self(trackerName + '.require', 'ga2fb');
     }
  }                        
})(window,document,'script','https://www.google-analytics.com/analytics.js','ga');

</script>