private static function LoadAchievements()
 {
     if (self::IsLoaded()) {
         return true;
     }
     self::$achievements_storage = DB::Characters()->select("SELECT * FROM `character_achievement` WHERE `guid` = %d ORDER BY `date` DESC", self::$guid);
     if (!self::$achievements_storage) {
         WoW_Log::WriteError('%s : achievements for character %s (GUID: %d) were not found!', __METHOD__, WoW_Characters::GetName(), WoW_Characters::GetGUID());
         return false;
     }
     self::$criterias_storage = DB::Characters()->select("SELECT * FROM `character_achievement_progress` WHERE `guid` = %d", self::$guid);
     if (!self::$criterias_storage) {
         WoW_Log::WriteError('%s : criterias for character %s (GUID: %d) were not found!', __METHOD__, WoW_Characters::GetName(), WoW_Characters::GetGUID());
     }
     self::$isAchievementsLoaded = true;
     return true;
 }