def unmonitor(self, target):
        """ Stop monitoring the online status of a user. Returns whether or not the server supports monitoring. """
        if 'monitor-notify' in self._capabilities and self.is_monitoring(target):
            yield from self.rawmsg('MONITOR', '-', target)
            self._monitoring.remove(target)
            return True
        else:
            return False
Stop monitoring the online status of a user. Returns whether or not the server supports monitoring.