MagmaCollectionReader sortBy: total number of elements in list?

[Chris Muller]

> | Hmm, I pretty sure it can't know which of the 6065 elements matching a
> | complex query expression the lowest of a particular key..  Sorry.

> If I understand you correctly on this, it means that even if the sorting for
> instance says: 200/2999, that if I read the first 20 items, these might
> still change afterwards, so I should warn the user that these are
> preliminary results. Or offcourse use #sortedBy:.

Oops, yes, that is what I meant.