33   this->DirectedGraph = nullptr;  in vtkMutableGraphHelper()
55   this->DirectedGraph = vtkMutableDirectedGraph::SafeDownCast(this->InternalGraph);  in SetGraph()
57   if (!this->DirectedGraph && !this->UndirectedGraph)  in SetGraph()
76   if (this->DirectedGraph)  in AddVertex()
78     return this->DirectedGraph->AddVertex();  in AddVertex()
93   if (this->DirectedGraph)  in AddEdge()
95     return this->DirectedGraph->AddEdge(u, v);  in AddEdge()
110   if (this->DirectedGraph)  in AddGraphEdge()
112     return this->DirectedGraph->AddGraphEdge(u, v);  in AddGraphEdge()
127   if (this->DirectedGraph)  in RemoveVertex()
129     return this->DirectedGraph->RemoveVertex(v);  in RemoveVertex()
144   if (this->DirectedGraph)  in RemoveVertices()
146     return this->DirectedGraph->RemoveVertices(verts);  in RemoveVertices()
161   if (this->DirectedGraph)  in RemoveEdge()
163     return this->DirectedGraph->RemoveEdge(e);  in RemoveEdge()
178   if (this->DirectedGraph)  in RemoveEdges()
180     return this->DirectedGraph->RemoveEdges(edges);  in RemoveEdges()