public function setComment($comment)
    {
        $thisCVID = $this->getVersionID();
        $comment = ($comment != null) ? $comment : "Version {$thisCVID}";
        $v = array(
            $comment,
            $thisCVID,
            $this->cID,
        );
        $app = Facade::getFacadeApplication();
        $db = $app->make('database')->connection();
        $q = "update CollectionVersions set cvComments = ? where cvID = ? and cID = ?";
        $db->executeQuery($q, $v);
        $this->cvComments = $comment;
    }