ioredis: how expire key with callback

var Redis        = require('ioredis');
redis = new Redis();

var key = 'expire_test';
var content ='content'
var timeout = 10;

redis.multi()
.set(key, content)
.expire(key, timeout, function(){
  console.log('out');
})
.exec(function(err) {
  if(err) {
    console.error("Failed to publish EXPIRE EVENT for " + content);
    console.error(err);
    return;
  }
});

like this?

.expire(key, timeout, function(){
  console.log('out');
})