锁

aijinhui

2024-01-13 da0fa1886b66e4d940f684da313d6160d478159f

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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));