MuonGM::DblQ00Wtgc::WTGC Node1 MuonGM::DblQ00Wtgc ::WTGC + version + jsta + nbevol + x0 + widchb + fwirch + fwixch Node2 std::array< std::string, 9 > Node2->Node1 +allname Node3 std::string Node3->Node2 +elements Node4 std::basic_string< char > Node4->Node3