egammaMonitoring::IHistograms Node1 egammaMonitoring::IHistograms # m_rootHistSvc + IHistograms() + IHistograms() + initializePlots() + fill() + fill() + ~IHistograms() Node2 std::string Node2->Node1 #m_folder #m_name #m_title Node4 std::map< std::string, TH1D * > Node2->Node4 +keys Node3 std::basic_string< char > Node3->Node2 Node4->Node1 +histoMap Node5 TH1D + GetBinContent() + SetBinContent() Node5->Node4 +elements