Summary: Lets your class/object say it works like something else

Description:
Perl 5 doesn't natively support Java-style interfaces, and it doesn't
support Perl 6 style roles either.

You can get both of these things in half a dozen different ways via various
CPAN modules, but they usually require that you buy into "their way" of
implementing your code.

Other have turned to "duck typing".

URL: http://search.cpan.org/dist/asa
License: GPL+ or Artistic

Maintainer: nobody