InDet::RobustTrackingGeometryBuilder Node1 InDet::RobustTrackingGeometry Builder - m_beamPipeBuilder - m_layerBuilders + RobustTrackingGeometryBuilder() + ~RobustTrackingGeometryBuilder() + initialize() + trackingGeometry() + geometrySignature() Node2 extends< InDet::RobustTracking GeometryBuilderImpl, Trk ::IGeometryBuilder > Node2->Node1