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The (goblins actor-lib facet) module provides an actor to wrap
another object and only allow certain methods through. It also
provides a convenience function for constructing such actors.
Construct a proxy of the actor wrap-me with access to only
methods, a list of symbols corresponding to methods of
wrap-me. The wrap-me will be invoked with $ if
possible, and otherwise will be invoked with <-. For cases
where synchronicity is possible but not desired, invoking the
facet asynchronously has the same effect as invoking
wrap-me asynchronously.
Spawn and return a reference to a ^facet, passing along
arguments to their equivalents in the constructor.