code: def __register_fully_extracted_warc_file(self, warc_url):
          
          with open(self.__log_pathname_fully_extracted_warcs, 'a') as log_file:
              log_file.write(warc_url + '\n')
docs: Saves the URL warc_url in the log file for fully extracted WARC URLs
          :param warc_url:
          :return: