Trk::basePropagator Node1 Trk::basePropagator + basePropagator() + ~basePropagator() + Propagate() + checkTarget() Node2 Trk::VKalExtPropagator - m_extrapolator - m_vkalFitSvc + VKalExtPropagator() + ~VKalExtPropagator() + Propagate() + checkTarget() + setPropagator() + myExtrapWithMatUpdate() + myExtrapToLine() + myExtrapNeutral() + myxAODFstPntOnTrk() - Protection() Node1->Node2