class AliITStrackV2: public AliKalmanTrack

 Conversion ESD track -> ITS track.
 If c==kTRUE, create the ITS track out of the constrained params.

 Reset the array of attached clusters.

 Update track params

Copy constructor

 This function compares tracks according to the their curvature

This function propagates a track to the minimal distance from the origin

 This function calculates a predicted chi2 increment.

This function propagates a track

  Propagates the track to a reference plane x=xToGo in n steps.
  These n steps are only used to take into account the curvature.
  The material is calculated with TGeo. (L.Gaudichet)

This function updates track parameters

 This function is for debugging purpose only

This function propagates a track

Double_t bz=GetBz();
if (!AliExternalTrackParam::Propagate(alp,xk,bz)) return kFALSE;

This function improves angular track parameters

Store the initail track parameters

 This function calculates dE/dX within the "low" and "up" cuts.
 Origin: Boris Batyunya, JINR, Boris.Batiounia@cern.ch
 Updated: F. Prino 8-June-2009

 The cluster order is: SDD-1, SDD-2, SSD-1, SSD-2

 Substitute the state of the track (p_{k|k},C_{k|k}) at the k-th measumerent by its
 smoothed value from the k-th measurement + measurement at the vertex.
 Account for the MS on nMS layers at x-postions xlMS with x/x0 = x2X0MS
 p_{k|kv} = p_{k|k} + C_{k|k}*D^Tr_{k+1} B^{-1}_{k+1} ( vtx - D_{k+1}*p_{k|k})
 C_{k|kv} = C_{k|k}*( I - D^Tr_{k+1} B^{-1}_{k+1} D_{k+1} C^Tr_{k|k})

 where D_{k} = H_{k} F_{k} with H being the matrix converting the tracks parameters
 to measurements m_{k} = H_{k} p_{k} and F_{k} the matrix propagating the track between the
 the point k-1 and k:  p_{k|k-1} = F_{k} p_{k-1|k-1}

 B_{k+1} = V_{k+1} + H_{k+1} C_{k+1|k} H^Tr_{k+1} with V_{k+1} being the error of the measurment
 at point k+1 (i.e. vertex), and C_{k+1|k} - error matrix extrapolated from k-th measurement to
 k+1 (vtx) and accounting for the MS inbetween

 H = {{1,0,0,0,0},{0,1,0,0,0}}

 This function stores dEdx sample corrected for the track segment length
 Origin: Boris Batyunya, JINR, Boris.Batiounia@cern.ch

 This function encodes in the module number also the status of cluster association
 "status" can have the following values:
 1 "found" (cluster is associated),
 2 "dead" (module is dead from OCDB),
 3 "skipped" (module or layer forced to be skipped),
 4 "outinz" (track out of z acceptance),
 5 "nocls" (no clusters in the road),
 6 "norefit" (cluster rejected during refit)
 7 "deadzspd" (holes in z in SPD)
 WARNING: THIS METHOD HAS TO BE SYNCHRONIZED WITH AliESDtrack::GetITSModuleIndexInfo()!

 This function encodes in the module number also the status of cluster association
 "status" can have the following values:
 1 "found" (cluster is associated),
 2 "dead" (module is dead from OCDB),
 3 "skipped" (module or layer forced to be skipped),
 4 "outinz" (track out of z acceptance),
 5 "nocls" (no clusters in the road),
 6 "norefit" (cluster rejected during refit),
 7 "deadzspd" (holes in z in SPD)
 Also given are the coordinates of the crossing point of track and module
 (in the local module ref. system)
 WARNING: THIS METHOD HAS TO BE SYNCHRONIZED WITH AliESDtrack::GetITSModuleIndexInfo()!

 deprecated: use CorrectForMeanMaterial instead