Akka.Dispatch.ConcurrentQueueMailbox.CleanUp C# (CSharp) Method

        public override void CleanUp()
        {
            var actorCell = ActorCell;
            if (actorCell != null) // actor is null for the deadLetterMailbox
            {
                var deadLetterMailbox = actorCell.System.Mailboxes.DeadLetterMailbox;
                Envelope envelope;
                while (_systemMessages.TryDequeue(out envelope))
                {
                    deadLetterMailbox.Post(actorCell.Self, envelope);
                }
                while (_userMessages.TryDequeue(out envelope))
                {
                    deadLetterMailbox.Post(actorCell.Self, envelope);
                }
            }

            //Akka JVM code:
            //   if (actor ne null) { // actor is null for the deadLetterMailbox
            //     val dlm = actor.dispatcher.mailboxes.deadLetterMailbox
            //     var messageList = systemDrain(new LatestFirstSystemMessageList(NoMessage))
            //     while (messageList.nonEmpty) {
            //       // message must be “virgin” before being able to systemEnqueue again
            //       val msg = messageList.head
            //       messageList = messageList.tail
            //       msg.unlink()
            //       dlm.systemEnqueue(actor.self, msg)
            //     }

            //     if (messageQueue ne null) // needed for CallingThreadDispatcher, which never calls Mailbox.run()
            //       messageQueue.cleanUp(actor.self, actor.dispatcher.mailboxes.deadLetterMailbox.messageQueue)
            //   }
        }