Descending timestamps in groupBy query

Hello,

I’m using a groupBy query that’s returning a very large result set. I’m mimicking “paging” by using limitSpec.limit, increasing the value on each subsequent request.

I’d like to offer my clients the ability to sort the data by descending date. So I’ll need the events array to return descending by timestamp. Currently it defaults to ascending timestamps and it doesn’t appear to be possible to change it.

Does anyone know of a way to get this behavior?