docs: void fireNewEntry(AsteriskQueueEntryImpl entry)
      {
          synchronized (listeners)
          {
              for (AsteriskQueueListener listener : listeners)
              {
                  try
                  {
                      listener.onNewEntry(entry);
                  }
                  catch (Exception e)
                  {
                      logger.warn("Exception in onNewEntry()", e);
                  }
              }
          }
      }