InDet::RobustTrackingGeometryBuilder Node1 InDet::RobustTrackingGeometry Builder - m_layerBuilders + RobustTrackingGeometryBuilder() + ~RobustTrackingGeometryBuilder() + initialize() + trackingGeometry() + geometrySignature() Node2 extends< InDet::RobustTracking GeometryBuilderImpl, Trk ::IGeometryBuilder > Node2->Node1 Node3 PublicToolHandle< Trk ::ILayerBuilder > Node3->Node1 -m_beamPipeBuilder