IJetHistoVarTool Node1 IJetHistoVarTool + ~IJetHistoVarTool() + value() + variable() + describe() + interfaceID() Node3 JetHistoVarTool - m_v - m_name - m_type - m_index - m_scale + JetHistoVarTool() + ~JetHistoVarTool() + initialize() + value() + variable() + describe() Node1->Node3 Node2 IAlgTool Node2->Node1