More easily explained with an example:

```
my $o = SpecialEffects->new( "config" => 'a' );
my $p = SpecialEffects->new( "config" => 'b' );

$o->sound(); # aliased to fizz(); same as $o->fizz()
$p->sound(); # aliased to clonk(); same as $p->clonk()

```

Is it possible to do this in Perl? Perhaps using some typeglob or coderef trickery?

I'm trying to keep the `SpecialEffects` interface simple. I'd prefer not to start building an object hierarchy. The `sound()` method is what's exposed, only its behaviour can be configured slightly.

I already know that you can alias with `*sound = \&fizz;` but that is a global thing as far as I know, and I'd like it encapsulated in the object.