Description:

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 pagma. It will also not touch anything that looks like a
method, according to 'Class::MOP::Class::get_method_list'.