Trk::IVertexMapper Node1 Trk::IVertexMapper + DeclareInterfaceID() + ~IVertexMapper() + mapToLocal() Node3 Trk::VertexMapper - m_trackingGeometry - m_trackingGeometryName + VertexMapper() + ~VertexMapper() + initialize() + finalize() + mapToLocal() + handle() - updateTrackingGeometry() - trackingGeometry() Node1->Node3 Node2 IAlgTool Node2->Node1