Trk::TwoTracks Node1 Trk::TwoTracks + TwoTracks() + TwoTracks() + TwoTracks() + ~TwoTracks() + getFirstPerigee() + getSecondPerigee() + setFirstPerigee() + setSecondPerigee() Node2 std::pair< const Perigee *, const Perigee * > Node2->Node1