Method set_num_rows

cpp/src/parquet/metadata.cc:2016–2018

int64_t RowGroupMetaDataBuilder::num_rows() { return impl_->num_rows(); }

void RowGroupMetaDataBuilder::set_num_rows(int64_t num_rows) {
  impl_->set_num_rows(num_rows);
}

void RowGroupMetaDataBuilder::Finish(int64_t total_bytes_written,
                                     int16_t row_group_ordinal) {