/**
* Implement the hook that is called when a property changes (from Wire)
*
* Alert the $pagefiles of the change
*
*/
public function ___changed($what)
{
if (in_array($what, array('description', 'tags', 'file'))) {
$this->set('modified', time());
$this->pagefiles->trackChange('item');
}
parent::___changed($what);
}
