code: func ConvertTracker(request *http.Request, tracker remoteworkitem.Tracker) *app.Tracker {
  	trackerStringType := remoteworkitem.APIStringTypeTrackers
  	selfURL := rest.AbsoluteURL(request, app.TrackerHref(tracker.ID))
  	t := &app.Tracker{
  		Type: trackerStringType,
  		ID:   &tracker.ID,
  		Attributes: &app.TrackerAttributes{
  			URL:  tracker.URL,
  			Type: tracker.Type,
  		},
  		Links: &app.GenericLinks{
  			Self: &selfURL,
  		},
  	}
  	return t
  }
docs: // ConvertTracker converts from internal to external REST representation