CL-GSERVER.ACTOR
watch ACTOR WATCHER → result
ACTOR
:
a
T
WATCHER
:
a
T
result
: a T.
Registers `watcher' as a watcher of `actor'. Watching lets the watcher know about lifecycle changes of the actor being watched. I.e.: when it stopped. The message being sent in this case is: `(cons :stopped actor-instance)`