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node_modules/core-js/internals/copy-constructor-properties.js

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+'use strict';
+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));
+    }
+  }
+};