code: def routers_updated(self, context, routers, operation=None, data=None,
                          shuffle_agents=False):
          
          if routers:
              self._notification(context, 'routers_updated', routers, operation,
                                 shuffle_agents)
docs: Notify cfg agents about configuration changes to routers.
  
          This includes operations performed on the router like when a
          router interface is added or removed.