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  | 'use strict'; 
 |  var collection = require('../internals/collection'); 
 |  var collectionStrong = require('../internals/collection-strong'); 
 |    
 |  // `Map` constructor 
 |  // https://tc39.es/ecma262/#sec-map-objects 
 |  collection('Map', function (init) { 
 |    return function Map() { return init(this, arguments.length ? arguments[0] : undefined); }; 
 |  }, collectionStrong); 
 |  
  |