how to add custom action for selected ids in WhiteOctoberAdminBundle

gistfile1.php

<?php

class ArticleAdmin extends DoctrineORMAdmin
{
    protected function configure()
    {
        // this clouse will be called 
        $batchActions['approve'] = function($selected, $container, $batchAction) {
            var_dump($selected);
        };

        $batchCollection = new BatchActionCollection();
        $batchCollection->get('batch')->setOption('actions', $batchActions);

        $this
            ->setName('Articles')
            ->setDataClass('Rj\\BlogBundle\\Entity\Article')
            ->addFields(array('title', 'authorName', 'creationTime'))
            ->addAction($batchCollection)

            // you need jquery enabled for the plugin. in my case it is done in layout
            ->setBaseTemplate('CoreBundle:Layout:default.html.twig')
            ->setActionOption('doctrine.orm.list', 'batch', true)
            ->setActionOption('doctrine.orm.list', 'batch_actions', array('approve' => 'Approve'))
        ;
    }
}