MuonGM::DblQ00Wmdt::WMDT Node1 MuonGM::DblQ00Wmdt ::WMDT + version + iw + x0 + laymdt + tubpit + tubrad + tubsta + tubdea + tubwal Node2 std::string Node2->Node1 +typ Node3 std::basic_string< char > Node3->Node2 Node4 std::array< float, 4 > + elements Node4->Node1 +tubxco +tubyco