.. seealso:: :attr:`text`

def text(self, text):
        '''
        .. seealso:: :attr:`text`
        '''

        if text:
            if not isinstance(text, str):
                text = _pformat(text)
            text += '\n\n'
            self.m(
                'add text to mail',
                more=dict(len=len(text))
            )
            self.__message.attach(_MIMEText(text, 'plain', 'UTF-8'))