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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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