Referable

pub trait Referable: Named {}

This is a marker trait indicating that a type is eligible to serve as a reference to a remote actor (i.e., an actor that may reside on a different proc).

It requires:

• Named: the type must provide a static name.

Note that Referable itself does not impose Send or Sync bounds. Specific contexts that need these bounds (such as spawning across threads or storing in shared data structures) will add them explicitly at their call sites.