code: function handle_res (self, res) {
  	//debug.log('handle_res()...');
  
  	debug.assert(self).is('object');
  	debug.assert(res).is('object');
  	debug.assert(res.client).is('object');
  
  	let client = res.client;
  
  	debug.assert(client.query).is('function');
  
  	let conn = {
  		"query": nr_nfbind("nor-pg:query", client.query.bind(client)),
  		"done": res.done,
  		"client": client
  	};
  
  	self._conn = conn;
  
  	// Pass NOTIFY to clients
  	if (is.func(self.emit)) {
  		debug.assert(self._notification_listener).is('function');
  		client.on('notification', self._notification_listener);
  	}
  
  	return self;
  }
docs: `res` will have properties client and done from pg.connect()
  
  @param self
  @param res
  @returns {*}