code: func destinationFlagsToString(fwdMethod uint32) string {
  	var value string
  
  	switch fwdMethod {
  	case ipvs.ConnectionFlagMasq:
  		value = "nat"
  		// *flags =
  	case ipvs.ConnectionFlagTunnel:
  		value = "tunnel"
  	default:
  		// Default is Direct Routing
  		value = "route"
  	}
  
  	return value
  }
docs: //MarshalJSON ...