See also #416
I would like to import several LinkML files into a root file, including the option of mentioning different slots on a shared class across at least two of the files, so that the import gets the union of slots on that class.
It's not working in this minimal repo:
ValueError: Conflicting URIs (https://example.com/c, https://example.com/b) for item: classb
a.yaml is the root. c.yaml asserts an additional slot on class b from b.yaml.