Trailers: update list of auto attachable units

To update the trailers-units association list, use the command resource/update_trailer_units:

svc=resource/update_trailer_units&params={"itemId":<long>,
					  "units":[<long>]}

Parameters

Name Description
itemId resource ID
units array of units IDs

Response

{
	"trlrun":[<long>]	/* array of auto attachable units */
}