the iterator chunking proposal has a .windows helper which is like [...[1, 2, 3, 4, 5].values().windows(3)] // [ [1, 2, 3], [2, 3, 4], [3, 4, 5] ]. what behavior you expect when the specified window size is larger than the total number of items in the iterator? options I see:

1. you get an empty iterator, any items in the window are silently dropped
2. you get an iterator which holds a single undersized window with all items in the iterator
3. throw