RepointableActorRef (and potentially others) may change their locality at runtime, meaning that isLocal might not be stable. RepointableActorRef has the feature that it starts out “not fully started” (but you can send to it), which is why [!:IsSt] features here; it is not improbable that cluster actor refs will have the same behavior. INTERNAL

public interface RepointableRef : ActorRefScope

Public Interface RepointableRef
	Inherits ActorRefScope

public interface class RepointableRef : ActorRefScope

type RepointableRef =  
    interface
        interface ActorRefScope
    end