1 var classof = require('../internals/classof');
2 var Iterators = require('../internals/iterators');
3 var wellKnownSymbol = require('../internals/well-known-symbol');
5 var ITERATOR = wellKnownSymbol('iterator');
7 module.exports = function (it) {
8 if (it != undefined) return it[ITERATOR]
10 || Iterators[classof(it)];