修改了导入，预览

feige

2023-04-24 0a042073bb1583e1d0935470f62233c353962b27

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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));