IMAP Sync - bm-migrator-latest

Hi, I am trying to migrate some E-Mails from Dovecot to BlueMind and I have the bm-migrator-latest, but it shows this error:

please install imapsync and make it available in the path

However, apt-cache search imapsync returns 0 results.

Which imapsync is the tool referring to?

P.S. Is the bm-migrator documented anywhere?

If anyone has this problem, it’s this imapsync: