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							- 'use strict';
 
- var defineBuiltIn = require('../internals/define-built-in');
 
- module.exports = function (target, src, options) {
 
-   for (var key in src) {
 
-     if (options && options.unsafe && target[key]) target[key] = src[key];
 
-     else defineBuiltIn(target, key, src[key], options);
 
-   } return target;
 
- };
 
 
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