In this particular instance, we use a blessed glob reference as the instance
instead of a blessed hash reference.
-=item Moose::Cookbook::Meta::Recipe8 - Hooking into immutabilization (TODO)
+=item Hooking into immutabilization (TODO)
Moose has a feature known as "immutabilization". By calling C<<
__PACKAGE__->meta()->make_immutable() >> after defining your class