Prado\Data\SqlMap\Statements\TSqlMapObjectCollectionTree::__sleep PHP Метод

    public function __sleep()
    {
        $exprops = array();
        $cn = __CLASS__;
        if (!count($this->_tree)) {
            $exprops[] = "{$cn}_tree";
        }
        if (!count($this->_entries)) {
            $exprops[] = "{$cn}_entries";
        }
        if (!count($this->_list)) {
            $exprops[] = "{$cn}_list";
        }
        return array_diff(parent::__sleep(), $exprops);
    }