Method CreatePageFormat

src/data/sparse_page_source.h:234–237

 public:
  auto CreatePageFormat(BatchParam const&) const {
    std::unique_ptr<FormatT> fmt{::xgboost::data::CreatePageFormat<S>("raw")};
    return fmt;
  }
  static void DestroyPage(std::shared_ptr<S>* page) { page->reset(); }
};