code: def add_static_route(self, gateway, destination, network=None):
          
          routing_node_gateway = RoutingNodeGateway(gateway,
              destinations=destination)     
          return self._add_gateway_node('router', routing_node_gateway, network)
docs: Add a static route to this route table. Destination can be any element
          type supported in the routing table such as a Group of network members.
          Since a static route gateway needs to be on the same network as the
          interface, provide a value for `network` if an interface has multiple
          addresses on different networks.
          ::
  
              >>> engine = Engine('ve-1')
              >>> itf = engine.routing.get(0)
              >>> itf.add_static_route(
                      gateway=Router('tmprouter'),
                      destination=[Group('routegroup')])
          
          :param Element gateway: gateway for this route (Router, Host)
          :param Element destination: destination network/s for this route.
          :type destination: list(Host, Router, ..)
          :raises ModificationAborted: Change must be made at the interface level
          :raises UpdateElementFailed: failure to update routing table
          :return: Status of whether the route table was updated
          :rtype: bool