make method to get data out of a module

internal/module/udp-multicast.go

@@ -126,3 +126,14 @@ func (um *UDPMulticast) Output(ctx context.Context, payload any) error {
 func (um *UDPMulticast) Stop() {
 	um.cancel()
 }
+
+func (um *UDPMulticast) Get(key string) (any, error) {
+	switch key {
+	case "ip":
+		return um.Addr.IP.String(), nil
+	case "port":
+		return um.Addr.Port, nil
+	default:
+		return nil, errors.New("net.udp.multicast key not found")
+	}
+}