code: def to_bigquery_fields(self, name_case=DdlParseBase.NAME_CASE.original):
          
  
          return self._columns.to_bigquery_fields(name_case)
docs: Generate BigQuery JSON fields define
  
          :param name_case: name case type
              * DdlParse.NAME_CASE.original : Return to no convert
              * DdlParse.NAME_CASE.lower : Return to lower
              * DdlParse.NAME_CASE.upper : Return to upper
  
          :return: BigQuery JSON fields define