(self, name, value)
Given the header name and the value from the model, return the value
        to be returned to the application program that is requesting that
        header.  The value passed in by the email package may contain
        surrogateescaped binary data if the lines were parsed by a BytesParser.
        The returned value should not contain any surrogateescaped data.
Given the header name and the value from the model, return the value
        to be returned to the application program that is requesting that
        header.  The value passed in by the email package may contain
        surrogateescaped binary data if the lines were parsed by a BytesParser.
        The returned value should not contain any surrogateescaped data.
Given the header name and the value from the model return the value to be returned to the application program that is requesting that header . The value passed in by the email package may contain surrogateescaped binary data if the lines were parsed by a BytesParser . The returned value should not contain any surrogateescaped data .
def header_fetch_parse(self, name, value):
        """Given the header name and the value from the model, return the value
        to be returned to the application program that is requesting that
        header.  The value passed in by the email package may contain
        surrogateescaped binary data if the lines were parsed by a BytesParser.
        The returned value should not contain any surrogateescaped data.

        """
        raise NotImplementedError
def header_fetch_parse ( self , name , value ) : raise NotImplementedError