Flow3 redirect process

/**
 *
 * @param \TYPO3\Flow\Persistence\QueryResultInterface $items
 * @return void
 */
public function indexAction(\TYPO3\Flow\Persistence\QueryResultInterface $items = NULL)
{
    $items = ($items ? $items : $this->itemRepository->findAll());
    $this->view->assign('items', $items);
}


public function searchAction() {
    [...]
    // $items is type of \TYPO3\Flow\Persistence\QueryResultInterface
    $this->redirect('index', NULL, NULL, array('items' => $items));
}