[Dovecot] fts plugin - purpose of get_last_uid() ?

It looks like the uid returned is only used as an indication of whether the maildir is fully indexed or not, is that correct?

In my setup, the index is built externally and will _always_ be up-to-date. Getting the last uid would mean running a query, which, whilst inexpensive, seems unnecessary if my understanding of the purpose of get_last_uid() is correct.

thanks Per Jessen, Zürich