--- /dev/null
+'use strict';
+var $ = require('../internals/export');
+var DESCRIPTORS = require('../internals/descriptors');
+var FORCED = require('../internals/object-prototype-accessors-forced');
+var toObject = require('../internals/to-object');
+var toPrimitive = require('../internals/to-primitive');
+var getPrototypeOf = require('../internals/object-get-prototype-of');
+var getOwnPropertyDescriptor = require('../internals/object-get-own-property-descriptor').f;
+
+// `Object.prototype.__lookupGetter__` method
+// https://tc39.github.io/ecma262/#sec-object.prototype.__lookupGetter__
+if (DESCRIPTORS) {
+ $({ target: 'Object', proto: true, forced: FORCED }, {
+ __lookupGetter__: function __lookupGetter__(P) {
+ var O = toObject(this);
+ var key = toPrimitive(P, true);
+ var desc;
+ do {
+ if (desc = getOwnPropertyDescriptor(O, key)) return desc.get;
+ } while (O = getPrototypeOf(O));
+ }
+ });
+}