Method Count

cpp/src/arrow/csv/reader.cc:1166–1169

        row_count_(0) {}

  Future<int64_t> Count() {
    auto self = shared_from_this();
    return Init(self).Then([self]() { return self->DoCount(self); });
  }

 private:
  Future<> Init(const std::shared_ptr<CSVRowCounter>& self) {