text: "use strict";
  
  var _argumentsToArray = function (args) {
    var target = new Array(args.length);
    for (var i = 0; i < args.length; i++) {
      target[i] = args[i];
    }
  
    return target;
  };
  
  var concat = function () {
    var arrs = _argumentsToArray(arguments);
  };
  