1 var classof = require('../internals/classof');
2 var getMethod = require('../internals/get-method');
3 var Iterators = require('../internals/iterators');
4 var wellKnownSymbol = require('../internals/well-known-symbol');
6 var ITERATOR = wellKnownSymbol('iterator');
8 module.exports = function (it) {
9 if (it != undefined) return getMethod(it, ITERATOR)
10 || getMethod(it, '@@iterator')
11 || Iterators[classof(it)];