<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def up_to_date(self):
 """ Returns True if plugin posts are up to date Determined by self.updated and conf.GOSCALE_POSTS_UPDATE_FREQUENCY """

#        return False
        if not self.updated:
            return False
        return (utils.get_datetime_now() - self.updated).seconds < conf.GOSCALE_POSTS_UPDATE_FREQUENCY