code: @InternalApi
    public Row createRowFromProto(com.google.bigtable.v2.Row row) {
      RowBuilder<Row> builder = createRowBuilder();
      builder.startRow(row.getKey());
  
      for (Family family : row.getFamiliesList()) {
        for (Column column : family.getColumnsList()) {
          for (Cell cell : column.getCellsList()) {
            builder.startCell(
                family.getName(),
                column.getQualifier(),
                cell.getTimestampMicros(),
                cell.getLabelsList(),
                cell.getValue().size());
            builder.cellValue(cell.getValue());
            builder.finishCell();
          }
        }
      }
  
      return builder.finishRow();
    }
docs: Helper to convert a proto Row to a model Row.
  
  <p>For internal use only.