ActsTrk::ATLASUncalibSourceLinkSurfaceAccessor Node1 ActsTrk::ATLASUncalibSource LinkSurfaceAccessor - m_actsTrackingGeometry + ATLASUncalibSourceLinkSurface Accessor() + operator()() Node2 ActsTrk::DetectorElement ToActsGeometryIdMap + makeValue() + getValue() Node2->Node1 -m_detectorElementToGeometry IdMap Node3 std::unordered_map < ActsTrk::DetectorElement Key, Acts::GeometryIdentifier > Node3->Node2 Node4 K Node4->Node3 +keys Node5 T Node5->Node3 +elements