docs: def normalize(self):
          """
          :return: Sanitized table data.
          :rtype: tabledata.TableData
          """
  
          logger.debug("normalize: {}".format(type(self).__name__))
  
          normalize_headers = self._normalize_headers()
  
          return TableData(
              self.__normalize_table_name(),
              normalize_headers,
              self._normalize_rows(normalize_headers),
              dp_extractor=self._tabledata.dp_extractor,
              type_hints=self._type_hints,
          )