Method Seek

cpp/src/arrow/filesystem/gcsfs.cc:312–318

from Seekable

  // from Seekable
  Status Seek(int64_t position) override {
    if (closed()) return Status::Invalid("Cannot seek in a closed file");
    ARROW_ASSIGN_OR_RAISE(
        stream_, factory_(gcs::Generation(metadata_.generation()), gcs::ReadRange(),
                          gcs::ReadFromOffset(position)));
    return Status::OK();
  }

 private:
  Status InitializeStream() const {