diff --git a/core/themes/engines/twig/twig.engine b/core/themes/engines/twig/twig.engine
index e937f95..30c5d36 100644
--- a/core/themes/engines/twig/twig.engine
+++ b/core/themes/engines/twig/twig.engine
@@ -117,3 +117,29 @@ function twig_render_template($template_file, array $variables) {
   // This output has already been rendered and is therefore considered safe.
   return Markup::create(implode('', $output));
 }
+
+/**
+ * Removes child elements from a copy of the original array.
+ *
+ * Creates a copy of the renderable array and removes child elements by key
+ * specified through filter's arguments. The copy can be printed without these
+ * elements. The original renderable array is still available and can be used
+ * to print child elements in their entirety in the twig template.
+ *
+ * @param array|object $element
+ *   The parent renderable array to exclude the child items.
+ * @param string[] $args, ...
+ *   The string keys of $element to prevent printing.
+ *
+ * @return array
+ *   The filtered renderable array.
+ *
+ * @deprecated in Drupal 8.0.x and will be removed before 9.0.0. Use
+ *   \Drupal\Core\Template\TwigExtension::withoutFilter() instead.
+ */
+function twig_without($element) {
+  /** @var \Drupal\Core\Template\TwigExtension $extension */
+  $extension = \Drupal::service('twig.extension');
+
+  return call_user_func_array([$extension, 'withoutFilter'], func_get_args());
+}