virtual void TrackVertexPosition(TLorentzVector& position) const;
virtual void TrackVertexMomentum(TLorentzVector& momentum) const;
virtual Float_t TrackStep() const;
virtual void TrackVertexPosition(TLorentzVector& position) const;
virtual void TrackVertexMomentum(TLorentzVector& momentum) const;
virtual Float_t TrackStep() const;