Muon::MuonValidationTrackBlock Node1 Muon::MuonValidationTrack Block + trkid + MuonValidationTrackBlock() + fill() Node2 Muon::MuonValidationBlockBase + intBlocks + unsignedIntBlocks + floatBlocks + subBlocks + ~MuonValidationBlockBase() + addBlock() + addBlock() + addBlock() + addBlock() + init() + clear() Node2->Node1