void GetNTeor(Int_t layer, const AliITSclusterV2* cl, Float_t theta, Float_t phi, Float_t &ny, Float_t &nz);
Int_t GetError(Int_t layer, const AliITSclusterV2*cl, Float_t theta, Float_t phi, Float_t expQ, Float_t &erry, Float_t &errz);
Double_t GetPredictedChi2MI(AliITStrackV2* track, const AliITSclusterV2 *cluster,Int_t layer);
void GetNTeor(Int_t layer, const AliITSclusterV2* cl, Float_t theta, Float_t phi, Float_t &ny, Float_t &nz);
Int_t GetError(Int_t layer, const AliITSclusterV2*cl, Float_t theta, Float_t phi, Float_t expQ, Float_t &erry, Float_t &errz);
Double_t GetPredictedChi2MI(AliITStrackV2* track, const AliITSclusterV2 *cluster,Int_t layer);