'use strict'; 
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// TODO: Remove from `core-js@4` 
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var $ = require('../internals/export'); 
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var $group = require('../internals/array-group'); 
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var arrayMethodIsStrict = require('../internals/array-method-is-strict'); 
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var addToUnscopables = require('../internals/add-to-unscopables'); 
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// `Array.prototype.groupBy` method 
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// https://github.com/tc39/proposal-array-grouping 
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// https://bugs.webkit.org/show_bug.cgi?id=236541 
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$({ target: 'Array', proto: true, forced: !arrayMethodIsStrict('groupBy') }, { 
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  groupBy: function groupBy(callbackfn /* , thisArg */) { 
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    var thisArg = arguments.length > 1 ? arguments[1] : undefined; 
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    return $group(this, callbackfn, thisArg); 
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  } 
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}); 
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addToUnscopables('groupBy'); 
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