static function fetchPartByIdentifier($identifier)
 {
     $parts = eZNavigationPart::fetchList();
     if (isset($parts[$identifier])) {
         return $parts[$identifier];
     }
     // Return the first part which is the default
     if (isset($parts[0])) {
         return $parts[0];
     }
     return false;
 }
 public static function fetchNavigationParts()
 {
     return array('result' => eZNavigationPart::fetchList());
 }