code: func (points *PointsIndex) Get(id string) Point {
  	if point, ok := points.currentPosition[id]; ok {
  		// first it gets the set of the currentPosition and then gets the point from the set
  		// this is done so it triggers expiration on expiringSet, and returns nil if a point has expired
  		if result, resultOk := points.index.GetEntryAt(point).(set).Get(id); resultOk {
  			return result.(Point)
  		}
  	}
  	return nil
  }
docs: // Get gets a point from the index given an id.