static function fetchList()
 {
     $list =& $GLOBALS['eZCollaborationList'];
     if (isset($list)) {
         return $list;
     }
     $list = array();
     $activeHandlers = eZCollaborationItemHandler::activeHandlers();
     $repositories = eZCollaborationItemHandler::handlerRepositories();
     foreach ($activeHandlers as $handler) {
         $handlerInstance = eZCollaborationItemHandler::instantiate($handler, $repositories);
         if ($handlerInstance !== null) {
             $list[] = $handlerInstance;
         }
     }
     return $list;
 }