锁

aijinhui

2024-01-13 ccd29b236bfa01b34042c657c09288a4e2b7f310

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var nativeFunctionToString = require('./_function-to-string');
var WeakMap = require('./_global').WeakMap;
 
module.exports = typeof WeakMap === 'function' && /native code/.test(nativeFunctionToString.call(WeakMap));