Mutable Values for the Listener Actor Output Parameter [Solved (Pre-Existing Function)]
Simply put: The Broadcaster actor's input parameter is mutable; the Listener actor's output parameter is not mutable (it can only do values).
I think it would be helpful to have a mutable output for the Listener actor, specifically so that one can use the Broadcast/Listener actors to transmit text.
Does this sound useful to other people?
You need to set the 'type' of the listener to 'text', then it works.