code: def quote_identifier(self, string):
          
          if "." in string:
              parts = list(map(self.quote_single_identifier, string.split(".")))
  
              return ".".join(parts)
  
          return self.quote_single_identifier(string)
docs: Quotes a string so that it can be safely used as a table or column name,
          even if it is a reserved word of the platform. This also detects identifier
          chains separated by dot and quotes them independently.
  
          :param string: The identifier name to be quoted.
          :type string: str
  
          :return: The quoted identifier string.
          :rtype: str