TransmissionEvent is a named subclass of event, which allows access to the message the
packet it is trying to send which is used, should the event be retracted.
EventProcessor is a thread subclass whose primary goal is to keep a reference to the
associated event loop, which is used to transform threads into the more manageable
event loops
Given a formal parameter list, this auxiliary method returns a new table
consisting of the values of the bindings of the mandatory parameters of
formals within the context ctx.
Received in response to the CMDRequireService command of a remote VM
TODO: perhaps transform this into a sync_event and let CMDRequireService perform the reply
When a new VM has been discovered, the discovery agent is responsible for sending
all outstanding subscription topics to that VM, such that it can be checked whether
the newcomer has some publications that can resolve outstanding requests.
When the discovery manager receives a publication from another local actor or
another remote VM, the actor is asked to compare the incoming publication against
a subscription that it had announced previously.