Double_t CalculateTrackLikelihood(AliTRDseedV1 *tracklets, Double_t *chi2);
Int_t ImproveSeedQuality(AliTRDtrackingChamber **stack, AliTRDseedV1 *tracklet);
static Float_t CalculateReferenceX(AliTRDseedV1 *tracklets);
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+ void ResetSeedTB();
Float_t GetChi2Y(AliTRDseedV1 *tracklets) const;
Float_t GetChi2Z(AliTRDseedV1 *tracklets) const;
static Double_t fgTopologicQA[kNConfigs]; // Topologic quality
Double_t fTrackQuality[kMaxTracksStack]; // Track quality
Int_t fSeedLayer[kMaxTracksStack]; // Seed layer
+ AliTRDchamberTimeBin *fSeedTB[kNSeedPlanes]; // seeding time bin planes
Int_t fSieveSeeding; //! Seeding iterator
static Int_t fgNTimeBins; // Timebins per plane in track prolongation