code: def _convert_update_row(row):
      
      after_values = row['after_values']  # type: dict
      before_values = row['before_values']  # type: dict
      values = after_values
      return {
          'values': values,
          'updated_values': _get_updated_values(before_values, after_values)
      }
docs: Convert a row for update event
  
      Args:
          row (dict): event row data