/**
* @param int|null $timestampMax
* @return mixed
*/
public function pop($timestampMax = null)
{
$timestampMax = null !== $timestampMax ? (int) $timestampMax : null;
if (null !== $timestampMax) {
$result = $this->_adapter->popDelayed($this->_key, $timestampMax);
$value = array_map('unserialize', $result);
} else {
$result = $this->_adapter->pop($this->getKey());
$value = unserialize($result);
}
return $value;
}
