protected function _commandDialog(KControllerToolbarCommand $command)
    {
        $command->append(array(
            'href'	  => ''
        ))->append(array(
            'attribs' => array(
                'href'  => $command->href,
                'data-k-modal'   => array('type' => 'iframe')
            )
        ));

        $command->attribs['data-k-modal'] = json_encode($command->attribs['data-k-modal']);
    }