When you import a function into a Perl package, it will naturally also be
available as a method. The 'namespace::autoclean' pragma will remove all
imported symbols at the end of the current package's compile cycle. Functions
called in the package itself will still be bound by their name, but they won't
show up as methods on your class or instances. This module is very similar to
namespace::clean, except it will clean all imported functions, no matter if you
imported them before or after you 'use'd the pragma. It will also not touch
anything that looks like a method.
