text: 'use strict';
  
  require('../../modules/es6.weak-map');
  require('../../modules/es7.weak-map.of');
  var $WeakMap = require('../../modules/_core').WeakMap;
  var $of = $WeakMap.of;
  module.exports = function of() {
    return $of.apply(typeof this === 'function' ? this : $WeakMap, arguments);
  };