registerArgument('value', 'mixed', 'The variable being checked', true); } /** * @param array $arguments * @param \Closure $renderChildrenClosure * @param RenderingContextInterface $renderingContext * @return bool */ public static function renderStatic( array $arguments, \Closure $renderChildrenClosure, RenderingContextInterface $renderingContext ): bool { return is_array($arguments['value']); } }