protected function render_head_link_stylesheet()
 {
     parent::render_head_link_stylesheet();
     HTMLTags_LinkRenderer::render_style_sheet_link('/styles/exception-page.css');
 }
 protected function render_head_link_stylesheet()
 {
     parent::render_head_link_stylesheet();
     HTMLTags_LinkRenderer::render_style_sheet_link('/styles/mailing-list-sign-up.css');
 }