Muon::IMuonTrackTruthTool Node1 Muon::IMuonTrackTruthTool + match() + match() + createTruthTree() + getTruth() + getTruth() + getTruth() + getTruth() + getMother() + getAncestor() + getInitial() + getNumberOfScatters() + interfaceID() Node2 IAlgTool Node2->Node1