/**
* @param $key
* @param callable $closure
* @param int $ttl
* @return Key
*/
public function __invoke($key, \Closure $closure, $ttl = 86400)
{
$keyObj = new Key($this->predis, $key);
$keyObj->setKeyPrefix($this->keyPrefix);
$keyObj->setTtl($ttl);
$keyObj->setClosure($closure);
$keyObj->setOnHit($this->onHit);
$keyObj->setOnMiss($this->onMiss);
$keyObj->setEnabled($this->enabled);
return $keyObj;
}