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- var hasOwn = require('../internals/has-own-property');
- var ownKeys = require('../internals/own-keys');
- var getOwnPropertyDescriptorModule = require('../internals/object-get-own-property-descriptor');
- var definePropertyModule = require('../internals/object-define-property');
- module.exports = function (target, source, exceptions) {
- var keys = ownKeys(source);
- var defineProperty = definePropertyModule.f;
- var getOwnPropertyDescriptor = getOwnPropertyDescriptorModule.f;
- for (var i = 0; i < keys.length; i++) {
- var key = keys[i];
- if (!hasOwn(target, key) && !(exceptions && hasOwn(exceptions, key))) {
- defineProperty(target, key, getOwnPropertyDescriptor(source, key));
- }
- }
- };
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