node_name);
    }

    // Change all usage node to use the original node instead.
    Node* original_node = iter->second;
    std::vector<const Edge*> control_edges;
    std::vector<OutEdgeInfo> data_edges;
    for (auto e : n->out_edges()) {
      if (e->IsControlEdge()) {
        control_edges.push_back(e);
      } else {
        data_edges.push_back({e->dst(), e->src_output(), e->dst_input()});