getComponentAttributeValueAndRemoveIfPresent(HeadingTag::LEVEL); if ($level !== null) { $tag->addClassName(StyleAttribute::addComboStrapSuffix("outline-section")); $tag->addClassName(StyleAttribute::addComboStrapSuffix("outline-level-$level")); } return $tag->toHtmlEnterTag("section"); } public static function renderExitXhtml(): string { return ''; } }