public static function hasPurchasedDiskSpace() { if (self::$hasPurchasedDiskSpace !== null) { return self::$hasPurchasedDiskSpace; } if (!(ModuleManager::isModuleInstalled('bitrix24') && Loader::includeModule('bitrix24')) && method_exists('CBitrix24', 'IsExtraDiskSpace')) { return self::$hasPurchasedDiskSpace = false; } return self::$hasPurchasedDiskSpace = \CBitrix24::IsExtraDiskSpace(); }