//virtual Int_t AddTrack(const AliVParticle *t) = 0;
virtual Int_t GetNumberOfTracks() const = 0;
virtual Int_t GetNumberOfV0s() const = 0;
+ virtual Int_t GetNumberOfCascades() const = 0;
// Primary vertex
virtual const AliVVertex *GetPrimaryVertex() const {return 0x0;}