code: def _GetTable(self):
      
      result = []
      # Avoid the global lookup cost on each iteration.
      lstr = str
      for row in self._table:
        result.append(
            '%s\n' %
            self.separator.join(lstr(v) for v in row))
  
      return ''.join(result)
docs: Returns table, with column headers and separators.
  
      Returns:
        The whole table including headers as a string. Each row is
        joined by a newline and each entry by self.separator.