nextCursor when there are no next pages

[andreialecu]

Hey, I was looking into this library and was wondering if this was supported, or if it's implemented already.

Assume a collection of chat messages. I'd like to get the last page, but have both a prevCursor and nextCursor available, even is there are no further results at the time of the query.

The prevCursor would work to get previous chat message pages, such as when the user scrolls up to browse through the history.

Assume the client is notified of new messages. It should be able to query with the nextCursor token and get new messages.

It might also work by sorting descending, but a cursor token to get fresh messages would still be needed.