public function other_cols($column, $row) {
        if (preg_match('/^status([\d]+)$/', $column, $matches)) {
            $versionid = $matches[1];
            return $this->status($versionid, $row);
        }
        if (preg_match('/^usermodified([\d]+)$/', $column, $matches)) {
            if ($row->$column && $row->$column != $row->id) {
                $user = (object)['id' => $row->$column];
                username_load_fields_from_object($user, $row, 'mod');
                return $this->username($user, true);
            }
            return ''; // User agreed by themselves.
        }
        return null;
    }