diff --git a/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorage.php b/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorage.php
index 910e870..275e539 100644
--- a/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorage.php
+++ b/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorage.php
@@ -1723,6 +1723,8 @@ public function countFieldData($storage_definition, $as_bool = FALSE) {
    *
    * @deprecated in Drupal 8.5.x, will be removed before Drupal 9.0.0. Use
    *   \Drupal\Core\Field\FieldStorageDefinitionInterface::isDeleted() instead.
+   *
+   * @see https://www.drupal.org/node/2907785
    */
   protected function storageDefinitionIsDeleted(FieldStorageDefinitionInterface $storage_definition) {
     return $storage_definition->isDeleted();