lwtDev::LightweightNNException Node1 lwtDev::LightweightNNException   + LightweightNNException() Node4 lwtDev::NNConfigurationException   + NNConfigurationException() Node1->Node4 Node5 lwtDev::NNEvaluationException   + NNEvaluationException() Node1->Node5 Node2 std::logic_error     Node2->Node1 Node3 std::exception     Node3->Node2 Node6 lwtDev::OutputRankException   + OutputRankException() Node5->Node6