Method InitializeStream

cpp/src/arrow/filesystem/gcsfs.cc:321–327

 private:
  Status InitializeStream() const {
    if (!stream_) {
      ARROW_ASSIGN_OR_RAISE(stream_, factory_(gcs::Generation(metadata_.generation()),
                                              gcs::ReadRange(), gcs::ReadFromOffset()));
    }
    return Status::OK();
  }
  InputStreamFactory factory_;
  gcs::ObjectMetadata metadata_;
  std::shared_ptr<GcsInputStream> mutable stream_;