/**
* {@inheritdoc}
*/
public function __wakeup()
{
parent::__wakeup();
// Initialize static caches.
$this->parents = array();
$this->parentsAll = array();
$this->children = array();
$this->treeChildren = array();
$this->treeParents = array();
$this->treeTerms = array();
$this->trees = array();
}