Trk::IVertexSelectionTool Node1 Trk::IVertexSelectionTool + ~IVertexSelectionTool() + findVertexInContainer() + interfaceID() Node3 Trk::TruthVertexSelectionTool - m_mcEventCollectionKey + initialize() + finalize() + TruthVertexSelectionTool() + ~TruthVertexSelectionTool() + findVertexInContainer() Node1->Node3 Node2 IAlgTool Node2->Node1