docs: def update_col(self, column_name, series):
          """
          Add or replace a column in the underlying DataFrame.
  
          Parameters
          ----------
          column_name : str
              Column to add or replace.
          series : pandas.Series or sequence
              Column data.
  
          """
          logger.debug('updating column {!r} in table {!r}'.format(
              column_name, self.name))
          self.local[column_name] = series