Method WriteMetadata

cpp/src/arrow/flight/client.cc:464–472

  }

  Status WriteMetadata(std::shared_ptr<Buffer> app_metadata) override {
    FlightPayload payload;
    payload.app_metadata = app_metadata;
    ARROW_ASSIGN_OR_RAISE(auto success, stream_->WriteData(payload));
    if (!success) {
      return Close();
    }
    return Status::OK();
  }

  Status WriteWithMetadata(const RecordBatch& batch,
                           std::shared_ptr<Buffer> app_metadata) override {