/**
* Get meta value
* If field is cloneable, value is saved as a single entry in DB
* Otherwise value is saved as multiple entries (for backward compatibility)
*
* @see "save" method for better understanding
*
* @param $post_id
* @param $saved
* @param $field
*
* @return array
*/
static function meta($post_id, $saved, $field)
{
if (isset($field['parent']) && $field['parent']) {
$post = get_post($post_id);
return $post->post_parent;
}
return parent::meta($post_id, $saved, $field);
}