<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:

def _accept_as_blank(self, url_info: URLInfo):
        '''Mark the URL as OK in the pool.'''
        _logger.debug(__('Got empty robots.txt for {0}.', url_info.url))
        self._robots_txt_pool.load_robots_txt(url_info, '')