Get an iterator over the next 'count' items of the given iterator.
next([1, 4, 3, 6, 7, 4, 5].values(), 3); // 1, 4, 3 Copy
next([1, 4, 3, 6, 7, 4, 5].values(), 3); // 1, 4, 3
Get an iterator over the next 'count' items of the given iterator.