Burrow.BurrowConsumer.MessageInProgressCount C# (CSharp) Метод

        private int MessageInProgressCount()
        {
            lock (Subscription.OutstandingDeliveryTags)
            {
                return Subscription.OutstandingDeliveryTags.ContainsKey(ConsumerTag)
                                    ? Subscription.OutstandingDeliveryTags[ConsumerTag].Count
                                    : 0;
            }
        }
    }