code: func (ncc *SeesawNCC) IPVSUpdateDestination(dst *ncctypes.IPVSDestination, out *int) error {
  	ipvsMutex.Lock()
  	defer ipvsMutex.Unlock()
  	return ipvs.UpdateDestination(*dst.Service, *dst.Destination)
  }
docs: // IPVSUpdateDestination updates the specified destination in the IPVS table.