def METHOD_NAME(self) -> MIMEMultipart:
    message = MIMEMultipart('alternative')
    message['Subject'] = self.subject
    message['From'] = self.sender
    message['To'] = self.recipient
    part1 = MIMEText(self.text, 'plain')
    part2 = MIMEText(self.html, 'html')
    message.attach(part1)
    message.attach(part2)
    return message