MuonExperimental::Gx2Fitter< propagator_t, traj_t > Node1 MuonExperimental::Gx2Fitter < propagator_t, traj_t > - m_propagator - kInvalid + Gx2Fitter() + fit() - logger() Node2 std::unique_ptr< const Logger > + ptr + operator->() Node2->Node1 -m_actorLogger -m_addToSumLogger -m_logger