Get folders from icloud container

[delfme]

Hello,
is it possible to fetch the level 1 folders from the container?

I don't have subfolders and the tree is like:
root/folder1
root/folder2
...
root/folderN

I would like to get the list [folder1, folder,2 ..., folderN] in a performant way, which doesnt require to inspect all files inside the container. Is that doable?