Prado\Data\SqlMap\Configuration\TParameterProperty::__sleep PHP Метод

    public function __sleep()
    {
        $exprops = array();
        $cn = 'TParameterProperty';
        if ($this->_typeHandler === null) {
            $exprops[] = "{$cn}_typeHandler";
        }
        if ($this->_type === null) {
            $exprops[] = "{$cn}_type";
        }
        if ($this->_column === null) {
            $exprops[] = "{$cn}_column";
        }
        if ($this->_dbType === null) {
            $exprops[] = "{$cn}_dbType";
        }
        if ($this->_property === null) {
            $exprops[] = "{$cn}_property";
        }
        if ($this->_nullValue === null) {
            $exprops[] = "{$cn}_nullValue";
        }
        return array_diff(parent::__sleep(), $exprops);
    }