public function resetPreviewsAction()
    {
        /* @var $cssPreview \Grid\Customize\Service\CssPreview */
        $cssPreview = $this->getServiceLocator()
                           ->get( 'Grid\Customize\Service\CssPreview' );

        foreach ( $cssPreview->getPreviews() as $url )
        {
            @ unlink( 'public' . $url );
        }

        $cssPreview->unsetPreviews();

        $this->messenger()
             ->add( 'customize.preview.reset',
                    'customize', Message::LEVEL_INFO );

        return $this->redirect()
                    ->toUrl( '/' );
    }