private:
AliGoodTracksPP(const TString& infilename = TString("good_tracks_tpc")); //constructor
- ~AliGoodTracksPP(); //dctor
+ virtual ~AliGoodTracksPP(); //dctor
const GoodTrack& GetTrack(Int_t event, Int_t n) const; //returns reference to the nth good track in event "event"