private static function doesThisPackNeedRegeneration(string $pack_path) :bool {
		return 
			// if the file does not exist
			!file_exists($pack_path) || 
			// or if we're not allowed to use cached items
			!\Polyfony\Config::get('response','cache') ||
			// of if the request explicitely disallows that
			!\Polyfony\Request::isCacheAllowed();
	}