Muon::MuonValidationTruthBlock Node1 Muon::MuonValidationTruth Block + pdg + barcode + beta + MuonValidationTruthBlock() + fill() Node2 Muon::MuonValidationBlockBase + intBlocks + unsignedIntBlocks + floatBlocks + subBlocks + ~MuonValidationBlockBase() + addBlock() + addBlock() + addBlock() + addBlock() + init() + clear() Node2->Node1