#13 Can't Recognize Co-Located Objects

[Kristopher Johnson]

If a R.C server returns a reference to one of its objects
to a client, and the client later passes that reference
into a server method, the server treats that reference
as a proxy, rather than as a local object.

This prevents some optimizations and other functionality
that would be possible if the server could treat the
object as a local object rather than as a proxy. For
example, it is not possible to downcast the object to its
true type.