class BasicFileStorage {

    public Stream<String> listStorageIdsByContainerName(String containerName) throws IOException {
        Path containerPath = getContainerPath(basePath, containerName);
        if (!Files.exists(containerPath)) {
            return Stream.empty();
        }
        return Files.list(containerPath)
            .map(path -> path.toFile().getName());
    }

    public  BasicFileStorage(String basePath);

}