Graphical Class Hierarchy Node0 CounterBase Node1 CounterAlgorithm Node0->Node1 Node3 CounterChain Node0->Node3 Node4 CounterGlobal Node0->Node4 Node5 CounterROS Node0->Node5 Node6 CounterSequence Node0->Node6 Node7 CounterThread Node0->Node7 Node2 CounterAlgorithmClass Node1->Node2