// add MCS in missing chambers if any
currentChamber = trackParamAtCluster->GetClusterPtr()->GetChamberId();
while (currentChamber < expectedChamber) {
// extrapolation to the missing chamber (update the propagator)
AliMUONTrackExtrap::ExtrapToZCov(trackParamAtCluster, AliMUONConstants::DefaultChamberZ(expectedChamber),
// add MCS in missing chambers if any
currentChamber = trackParamAtCluster->GetClusterPtr()->GetChamberId();
while (currentChamber < expectedChamber) {
// extrapolation to the missing chamber (update the propagator)
AliMUONTrackExtrap::ExtrapToZCov(trackParamAtCluster, AliMUONConstants::DefaultChamberZ(expectedChamber),