protected function addImageStyle()
    {
        $this->controlAccess('image_style_add');

        if ($this->image_style->add($this->getSubmitted())) {
            $this->redirect('admin/settings/imagestyle', $this->text('Image style has been added'), 'success');
        }

        $this->redirect('', $this->text('Image style has not been added'), 'warning');
    }