2 var $export = require('./_export')
3 , toObject = require('./_to-object')
4 , aFunction = require('./_a-function')
5 , $defineProperty = require('./_object-dp');
7 // B.2.2.3 Object.prototype.__defineSetter__(P, setter)
8 require('./_descriptors') && $export($export.P + require('./_object-forced-pam'), 'Object', {
9 __defineSetter__: function __defineSetter__(P, setter){
10 $defineProperty.f(toObject(this), P, {set: aFunction(setter), enumerable: true, configurable: true});