code: def routers_updated(self, context, routers):
          
          LOG.debug('Got routers updated notification :%s', routers)
          if routers:
              # This is needed for backward compatibility
              if isinstance(routers[0], dict):
                  routers = [router['id'] for router in routers]
              self._update_updated_routers_cache(routers)
docs: Deal with routers modification and creation RPC message.