A LoggingAdapter that can always be supplied implicitly.
If an implicit ActorSystem the created LoggingContext forwards to the log of the system.
If an implicit ActorContext is in scope the created LoggingContext uses the context's
ActorRef as a log source.
Otherwise, i.e. if neither an ActorSystem nor an ActorContext is implicitly available,
the created LoggingContext will forward to NoLogging, i.e. "/dev/null".
A LoggingAdapter that can always be supplied implicitly. If an implicit ActorSystem the created LoggingContext forwards to the log of the system. If an implicit ActorContext is in scope the created LoggingContext uses the context's ActorRef as a log source. Otherwise, i.e. if neither an ActorSystem nor an ActorContext is implicitly available, the created LoggingContext will forward to NoLogging, i.e. "/dev/null".