docs: private void removeClientId(String clientId) {
          //Sometimes the client Id will be null. For instance in the case QueueConnectionFactory, there is no default client Id specified in metatype.xml. 
          if (clientId == null)
              return; //do nothing
  
          ConcurrentHashMap<String, Integer> clientIdTable = JmsFactoryFactoryImpl.getClientIdTable();
  
          if (clientIdTable.containsKey(clientId)) {
              int referenceCount = clientIdTable.get(clientId).intValue();
              if (referenceCount == 1) {
                  clientIdTable.remove(clientId);
              } else {
                  clientIdTable.put(clientId, clientIdTable.get(clientId).intValue() - 1);
              }
          }
      }