How easy would it be to create the transformation to a list of paths without accessing the library’s internal functions?
Maybe it should be included in the fileset library itself?
One of the most common problems I come across in nixos configuration repos is the burden of importing nix files recursively.
digga’s rakeLeaves and haumea are often used to solve this problem but now that lib.filesets exists they seem like (reinventing the wheel)/overkill.