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Editing: index.js
'use strict'; var callBound = require('call-bind/callBound'); var $deref = callBound('WeakRef.prototype.deref', true); module.exports = typeof WeakRef === 'undefined' ? function isWeakRef(value) { // eslint-disable-line no-unused-vars return false; } : function isWeakRef(value) { if (!value || typeof value !== 'object') { return false; } try { $deref(value); return true; } catch (e) { return false; } };
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