Normally, if you try to call a method that there's no handler for, you
get an error:

  Can't locate object method "flork" via package "X".

But for classes that inherit from Class::BlackHole, unhandled methods
become just no-operations.

WWW: http://search.cpan.org/search?dist=Class-BlackHole

-- Sergey Skvortsov
skv@FreeBSD.org