2 var global = require('./_global')
3 , core = require('./_core')
4 , dP = require('./_object-dp')
5 , DESCRIPTORS = require('./_descriptors')
6 , SPECIES = require('./_wks')('species');
8 module.exports = function(KEY){
9 var C = typeof core[KEY] == 'function' ? core[KEY] : global[KEY];
10 if(DESCRIPTORS && C && !C[SPECIES])dP.f(C, SPECIES, {
12 get: function(){ return this; }