code: func (points *PointsIndex) Remove(id string) {
  	if prevPoint, ok := points.currentPosition[id]; ok {
  		set := points.index.GetEntryAt(prevPoint).(set)
  		set.Remove(prevPoint.Id())
  		delete(points.currentPosition, prevPoint.Id())
  	}
  }
docs: // Remove removes a point from the index.