code: public void removeAllListeners(RESTRequest request, ObjectName source_objName, JSONConverter converter) {
          NotificationTargetInformation nti = toNotificationTargetInformation(request, source_objName.getCanonicalName());
  
          //Get the corresponding List for the given ObjectName
          List<ServerNotification> notifications = serverNotifications.get(nti);
  
          if (notifications == null) {
              throw ErrorHelper.createRESTHandlerJsonException(new ListenerNotFoundException("There are no listeners registered for ObjectName: " + source_objName.getCanonicalName()),
                                                               converter,
                                                               APIConstants.STATUS_BAD_REQUEST);
          }
  
          Iterator<ServerNotification> notificationsIter = notifications.iterator();
          while (notificationsIter.hasNext()) {
              ServerNotification currentRegistration = notificationsIter.next();
  
              if (nti.getRoutingInformation() == null) {
                  //Remove from MBeanServer               
                  MBeanServerHelper.removeServerNotification(source_objName, //no need to make another ObjectName
                                                             currentRegistration.listener,
                                                             (NotificationFilter) getObject(currentRegistration.filter, null, converter),
                                                             getObject(currentRegistration.handback, null, converter),
                                                             converter);
              } else {
                  // Remove the notification listener from the Target-Client Manager through EventAdmin
                  MBeanRoutedNotificationHelper helper = MBeanRoutedNotificationHelper.getMBeanRoutedNotificationHelper();
                  helper.removeRoutedServerNotificationListener(nti,
                                                                currentRegistration.listener,
                                                                (NotificationFilter) getObject(currentRegistration.filter, null, converter),
                                                                getObject(currentRegistration.handback, null, converter),
                                                                converter);
              }
              //Remove from local list (through iterator)
              notificationsIter.remove();
  
              //Clean up library
              removeObject(currentRegistration.filter);
              removeObject(currentRegistration.handback);
          }
      }
docs: Remove the appropriate server notifications from our list