def network_route_exists?(network, nat_server_ip)
      routes = routes_show()
      matchdata = routes.match(route_regex(network, nat_server_ip))
      matchdata != nil
    end
def network_route_exists?(network, nat_server_ip)
      routes = routes_show()
      matchdata = routes.match(route_regex(network, nat_server_ip))
      matchdata != nil
    end
Is a route defined to network via NAT "router"?

 === Parameters
 network(String):: target network in CIDR notation
 nat_server_ip(String):: the IP address of the NAT "router"

 === Return
 result(Boolean):: true if route exists, else false