// This is to avoid multiple producers.
    std::vector<OutEdgeInfo> out_edge_info;
    out_edge_info.reserve(n->out_edges().size());
    for (auto edge : n->out_edges()) {
      out_edge_info.push_back(
          {edge->dst(), edge->src_output(), edge->dst_input()});
    }
    g->RemoveNode(n);
    for (const OutEdgeInfo& edge : out_edge_info) {
      if (edge.dst_input == Graph::kControlSlot) {

          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()});