Method num_nodes

tensorflow/lite/core/subgraph.cc:134–136

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