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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def last_ehlo_response(self, response: SMTPResponse) -> None: """ When setting the last EHLO response, parse the message for supported extensions and auth methods. """

        extensions, auth_methods = parse_esmtp_extensions(response.message)
        self._last_ehlo_response = response
        self.esmtp_extensions = extensions
        self.server_auth_methods = auth_methods
        self.supports_esmtp = True