public function deleteAction()
    {
        $themeId = $this->getEvent()->getRouteMatch()->getParam('themeId');
        $theme = $this->getAdminThemeService()->findById($themeId);
        $title = $theme->getTitle();
        $this->getAdminThemeService()->remove($theme);
        $this->flashMessenger()->addMessage('The theme "'.$title.'"has been deleted');

        return $this->redirect()->toRoute('admin/playgrounddesign_themeadmin');
    }