void DisplayEvent(Int_t,Int_t)const; //Display event
static Int_t Nparticles(Int_t iPid,Int_t iEventN,AliRunLoader *pRunLoader); //counts total number of particle with iPid
void PrintTracks (Int_t iEvent=0); //prints a list of tracks for a given event
- void CheckPR ()const; //utility-> run staff for stack ??????
void ReadESD(Int_t iEventN, Int_t iChamber)const;
void DrawRing(TVector3 entrance,TVector3 vectorTrack,Double_t thetaCer)const;