initializeEnsures the accessors for custom fields are always created.
add_alias($alias)Adds an alias to the internal respresentation of the bug. You will need to call update to make the changes permanent.
remove_alias($alias)Removes an alias from the internal respresentation of the bug. You will need to call update to make the changes permanent.
update_user_last_visit($user,
$last_visit)Creates or updates a Bugzilla::BugUserLastVisit for this bug and the supplied $user, the timestamp given as $last_visit.