  const TfLiteNode& node(size_t index) const override {
    int node_index = subgraph_->execution_plan()[index];
    return subgraph_->nodes_and_registration()[node_index].first;
  }
  const TfLiteNode& node(size_t index) const override {
    int node_index = subgraph_->execution_plan()[index];
    return subgraph_->nodes_and_registration()[node_index].first;
  }