Muon::MuonValidationTrackParticleBlock Node1 Muon::MuonValidationTrack ParticleBlock + pt + p + eta + phi + truth + MuonValidationTrackParticle Block() Node2 Muon::MuonValidationBlockBase + intBlocks + unsignedIntBlocks + floatBlocks + subBlocks + ~MuonValidationBlockBase() + addBlock() + addBlock() + addBlock() + addBlock() + init() + clear() Node2->Node1