Hehe! Magic enough, isn't it? That's because Perl can create methods. Or better: you can create methods in Perl.

Probably here you have a case in which one is being generated at runtime by means of AUTOLOAD (look it up in Perl's OO docs), but it may be inherited as well. Oh, and I'm far from being a Perl OO expert, but I suppose there may be other ways for it to pop out (appearently) out of nothing...