diff --git a/core/includes/common.inc b/core/includes/common.inc
index 67b1812..d6575c8 100644
--- a/core/includes/common.inc
+++ b/core/includes/common.inc
@@ -854,6 +854,7 @@ function drupal_pre_render_links($element) {
  *   'renderer' service instead.
  *
  * @see \Drupal\Core\Render\RendererInterface::renderRoot()
+ * @see https://www.drupal.org/node/2912696
  */
 function drupal_render_root(&$elements) {
   return \Drupal::service('renderer')->renderRoot($elements);
@@ -866,6 +867,7 @@ function drupal_render_root(&$elements) {
  *   'renderer' service instead.
  *
  * @see \Drupal\Core\Render\RendererInterface::render()
+ * @see https://www.drupal.org/node/2912696
  */
 function drupal_render(&$elements, $is_recursive_call = FALSE) {
   return \Drupal::service('renderer')->render($elements, $is_recursive_call);