public static function fetchListCount()
    {
        $rows = eZPersistentObject::fetchObjectList( self::definition(),
                                                     array(),
                                                     null,
                                                     false,
                                                     null,
                                                     false, false,
                                                     array( array( 'operation' => 'count( * )',
                                                                   'name' => 'count' ) ) );
        return $rows[0]['count'];
    }