MuonVal::MuonTPMetaDataAlg::SimMetaData Node1 MuonVal::MuonTPMetaDataAlg ::SimMetaData + mc_channel + prw_channel + prw_lumi + tot_events + proc_events + sum_w + sum_w_squared + variation_number + has_book_keeper + warned + ~SimMetaData() + SimMetaData() + operator<() Node2 std::string Node2->Node1 +weight_name Node3 std::basic_string< char > Node3->Node2