code: @SuppressWarnings("deprecation")
    public static ActorRef actorFor(ActorSystem system, String path) {
      return system.actorFor(path);
    }
docs: Helper util to access the private[akka] system.actorFor method
  
  This is used for performance optimization, we encode the session Id
  in the ActorRef path. Session Id is used to identity sender Task.
  
  @param system ActorSystem
  @param path Relative or absolute path of this Actor System.
  @return Full qualified ActorRef.