Method RollbackOneIter

src/c_api.cpp:252–255

    
    
  void RollbackOneIter() {
    std::lock_guard<std::mutex> lock(mutex_);
    boosting_->RollbackOneIter();
  }

  void PredictSingleRow(int num_iteration, int predict_type, int ncol,
               std::function<std::vector<std::pair<int, double>>(int row_idx)> get_row_fun,