def list_input_outputs(self, cname):
        return [n for n in self.pred[cname]
                             if self.out_degree(n)>1]
Return a list of names of input or state nodes that are used
dataset/ETHPy150Open OpenMDAO/OpenMDAO-Framework/openmdao.main/src/openmdao/main/depgraph.py/DependencyGraph.list_input_outputs