A set of setup settings for programmatic configuration of the actor system.
Marker supertype for a setup part that can be put inside ActorSystemSetup, if a specific concrete setup is not specified in the actor system setup that means defaults are used (usually from the config file) - no concrete setup instance should be mandatory in the ActorSystemSetup that an actor system is created with.
A set of setup settings for programmatic configuration of the actor system.
Constructor is *Internal API*. Use the factory methods ActorSystemSetup#create and akka.actor.Actor#apply to create instances.