stopIndexesAtNextDestination property
The ArcGISRoute.stops index values relating to the upcoming destination/arrival.
If there are coincident stops and the RouteTracker.skipCoincidentStops = true this will return a list with multiple index values. When there are no coincident stops or the RouteTracker.skipCoincidentStops = false this will return a list with just a single index value. This list can be used to relate a destination/arrival to the stops in the ArcGISRoute.stops array.