Further to the lightweight proxy thing, one of the things that proves
to be something of a pain in Pixie is writing 'self replacing'
proxies, where, once something is actually fetched from the database,
the proxy should go away. You can't simply assign to $_[0] (at least
in Perl 5) because that
This idea seems to fit in a lot of places. It's more of a design
pattern than anything else, but one I think P6 can use to good effect
in the standard library.
Lightweight Object Existance (LOE) Proxies
An LOE proxy is an object that proxies for another, heavier, object
that (maybe) doesn't
