$pc = ProductsController::getInstance();
	$pc->forceCleanUpHolds(PARSEDATEINSECONDS);
GIVES ERROR!


class ProductsController {

	static private $db;
	static private $instance = null;

	private function __construct() {
		$this->db = Dbo::getInstance();
	}

	static public function getInstance() {
		if(self::$instance == null){
			self::$instance = new self;
		}
		return self::$instance;
	}