Virtual folder with custom flags

Greetings,

I can't figure out how doesn it possible to create a virtual folder which contains mails which has falgs: \Flagged or any customers flag.

For example I do have a test mail:

mx2$ doas doveadm fetch -u kirill@korins.ky "mailbox flags" mailbox-guid fb9e821c7b778b658896000079e31c01 uid 67096 mailbox: Archive flags: \Flagged \Seen $NotJunk NotJunk $MailFlagBit0 $MailFlagBit2 Invoice mx2$

and virtual folder:

mx2$ cat /etc/dovecot/virtual/Flagged/dovecot-virtual
* -INBOX/Trash -INBOX/Trash/* -INBOX/Junk -INBOX/Junk/* flagged mx2$

If I unset flag \Flagged from that mail, it dissapear from the folder.

So, how should I change definition to keep it here if it has user's specified flags like Invoice or ASAP or whatsoever?

-- wbr, Kirill