'Notify provider updated security groups.'

def security_groups_provider_updated(self, context, devices_to_update=None):

    cctxt = self.client.prepare(version=self.SG_RPC_VERSION, topic=self._get_security_group_topic(), fanout=True)
    cctxt.cast(context, 'security_groups_provider_updated', devices_to_update=devices_to_update)
