egammaMonitoring::TrackHistograms Node1 egammaMonitoring::TrackHistograms + profileMap + initializePlots() + fill() + fill() + IHistograms() + IHistograms() Node2 egammaMonitoring::IHistograms + histoMap # m_name # m_title # m_folder # m_rootHistSvc + IHistograms() + IHistograms() + initializePlots() + fill() + fill() + ~IHistograms() Node2->Node1