Help with migration of Quota config to 2.4.0?

I've converted most of my config to 2.4.0, but one thing I don't get from the docs:

mail_plugins = $mail_plugins quota

protocol imap {
  mail_plugins = $mail_plugins imap_quota
}

plugin {
  quota = maildir:User quota:noenforcing
  quota_rule = *:storage=7GB
  quota_rule2 = Trash:storage=+10%%
}

How would this translate?