'Raise events for node purge notifications.'

def _handle_event_purge(self, msg):

    node = msg['pubsub_event']['purge']['node']
    event_name = self.node_event_map.get(node, None)
    self.xmpp.event('pubsub_purge', msg)
    if event_name:
        self.xmpp.event(('%s_purge' % event_name), msg)
