Question: How can I use your library to implement "internal" modules that can be accessed by their siblings or descendents only

[Nefcanto]

I have found your repository because of this reply on JS discourse group.

Basically I want to create a directory. Somehow specify that any exports in this directory (and subdirectories) are only visible to the family. That is the sibling files and the descendants.

Then I want to add an Exports.js file which explicitly exports universally-visible modules.
I read your docs and felt I could use your library for that purpose. But I still don't know how.
Can your library do that? And how?

Thank you.