def METHOD_NAME(self):
    '''Get a low-level session object or create one if needed'''
    if not self._session:
        if self.config.debug_mode:
            boto3.set_stream_logger(level=log.DEBUG)
        self._session = boto3.METHOD_NAME.Session(
            region_name=self.region_name, **self.session_cfg)
    return self._session