code: AsteriskQueueImpl getQueueByName(String queueName)
      {
          refreshQueueIfForced(queueName);
  
          AsteriskQueueImpl queue = getInternalQueueByName(queueName);
          if (queue == null)
          {
              logger.error("Requested queue '" + queueName + "' not found!");
          }
  
          return queue;
      }
docs: Retrieves a queue by its name.
  
  @param queueName name of the queue.
  @return the requested queue or <code>null</code> if there is no queue
  with the given name.