4.2

linwenling

2023-04-02 d7f140b91b514c9ed36361552c2c627730f086d0

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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));