-module.exports = function (it) {
- var iteratorMethod = getIteratorMethod(it);
- if (typeof iteratorMethod != 'function') {
- throw TypeError(String(it) + ' is not iterable');
- } return anObject(iteratorMethod.call(it));
+var TypeError = global.TypeError;
+
+module.exports = function (argument, usingIterator) {
+ var iteratorMethod = arguments.length < 2 ? getIteratorMethod(argument) : usingIterator;
+ if (aCallable(iteratorMethod)) return anObject(call(iteratorMethod, argument));
+ throw TypeError(tryToString(argument) + ' is not iterable');