That's a tougher one, because AFAIK does "classic Perl" only allow imports for "composition". Differing OO-frameworks might have differing approaches and builtin solutions for inspection.

But you can iterate over all subs in the namespace° of a class and inspect in which module it was originally defined.

There is a core module for that° Sub::Util (read the doc for subname ) ... or something like Sub::Identify from CPAN.

edit

°) This won't help you if the composition was done by changing AUTOLOAD , but I don't even know if this approach is even a thing in OOP (?)

°) sorry I was wrong about that, Sub::Util is not implementing what Sub::Identify does. But the latter comes with a compact pure Perl implementation using the B backend to extract those informations. AFAICS it's the same approach like described in the book "Perl Hacks".