Method CreateReader

src/data/sparse_page_source.h:202–205

  }

  std::unique_ptr<ReaderT> CreateReader(StringView name, std::uint64_t offset,
                                        std::uint64_t length) const {
    return std::make_unique<common::PrivateMmapConstStream>(std::string{name}, offset, length);
  }
};

template <typename S, template <typename> typename F>