/**
* Get all refs to an entity
*
* @param string $key Entity ref key
* @return Ref[]
*/
public function getRefs($key)
{
$current = $this->worker_pool->execute(new Command('retrieve_index', ['key' => $key]));
array_walk($current, function (&$item) {
$item = Ref::fromString($item);
});
return $current;
}
