public override void OnVisitEnd(Com.Gimbal.Android.Visit visit)
 {
     Log.Info(TAG, "OnVisitEnd Exited place: " + visit.Place.Name + "Entrance date: "
              + visit.ArrivalTimeInMillis.FromUnixTime().GetValueOrDefault().ToString("O")
              + "Exit date:"
              + visit.DepartureTimeInMillis.FromUnixTime().GetValueOrDefault().ToString("O"));
 }
        public override void OnVisitStart(Com.Gimbal.Android.Visit visit)
        {
            Log.Info(TAG, "Entered place: " + visit.Place.Name + "Entrance date: " + visit.ArrivalTimeInMillis.FromUnixTime().GetValueOrDefault().ToString("O"));
            RegionEvent enter = new RegionEvent(visit.Place.Identifier, SOURCE, RegionEvent.BoundaryEventEnter);

            UrbanAirship.UAirship.Shared().Analytics.AddEvent(enter);
        }