Because alist<T> is a subtype ofarray<T>, aniterable<T> cannot be a list.

This means that, as saidhere:

There is no way to be sure that keys of an iterable are successive (even if they are integers).
And if keys are not successive, the resulting JSON structure is an object and not an array.
According, to theJSON specification, object' keys must be strings, and not integers.

This imply that it is right now impossible to "yield" items from[{"itemId": 1, "modificationDate": "2025-10-10"}] - it can only be yielded from{"0": {"itemId": 1, "modificationDate": "2025-10-10"}}.

I think that in the real world, a lot of people want to be able to yield items from[...], even though it does not stick with the JSON specification.

This PR is doing the trade-off of consideringiterable<int, Anything> as an "iterable list" (likelist<Anything> but not cast to array).