Int_t GetSector(Double_t alpha) const;
Int_t GetStack(const AliExternalTrackParam *paramOut) const;
Double_t GetExtZ(const AliExternalTrackParam *paramIn) const;
Int_t GetSector(Double_t alpha) const;
Int_t GetStack(const AliExternalTrackParam *paramOut) const;
Double_t GetExtZ(const AliExternalTrackParam *paramIn) const;