diff --git a/core/lib/Drupal/Core/Entity/ContentEntityStorageBase.php b/core/lib/Drupal/Core/Entity/ContentEntityStorageBase.php
index 204351e..355f92b 100644
--- a/core/lib/Drupal/Core/Entity/ContentEntityStorageBase.php
+++ b/core/lib/Drupal/Core/Entity/ContentEntityStorageBase.php
@@ -347,8 +347,12 @@ public function delete(array $entities) {
    *
    * @return \Drupal\Core\Entity\EntityInterface[]
    *   The specified entity revisions or empty array if none found.
+   *
+   * @internal
+   *   https://www.drupal.org/node/1730874 This method is internal until we
+   *   decide to add it to \Drupal\Core\Entity\EntityStorageInterface.
    */
-  protected function loadMultipleRevisions(array $revision_ids) {
+  public function loadMultipleRevisions(array $revision_ids) {
     $revisions = [];
     foreach ($revision_ids as $revision_id) {
       $revisions[$revision_id] = $this->loadRevision($revision_id);
diff --git a/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorage.php b/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorage.php
index a68ea0d..35145b2 100644
--- a/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorage.php
+++ b/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorage.php
@@ -440,12 +440,12 @@ protected function getFromStorage(array $ids = NULL) {
   /**
    * {@inheritdoc}
    */
-  protected function loadMultipleRevisions(array $revision_ids) {
+  public function loadMultipleRevisions(array $revision_ids) {
     $revisions = $this->doLoadMutlipleRevisions($revision_ids);
 
     if ($revisions) {
       // The hooks are invoked keyed by entity ID so we have to do one by one.
-      foreach ($revisions as &$revision) {
+      foreach ($revisions as $revision) {
         $data = [$revision->id() => $revision];
         $this->invokeStorageLoadHook($data);
         $this->postLoad($data);
@@ -458,9 +458,8 @@ protected function loadMultipleRevisions(array $revision_ids) {
   /**
    * Gets multiple entity revisions from the storage.
    *
-   * @param array|null $revision_ids
-   *   If not empty, return entities that match these IDs. Return all entities
-   *   when NULL.
+   * @param array $revision_ids
+   *   Return entities that match these IDs.
    *
    * @return \Drupal\Core\Entity\ContentEntityInterface[]
    *   Array of entity revisions from the storage.
@@ -468,13 +467,11 @@ protected function loadMultipleRevisions(array $revision_ids) {
   protected function doLoadMutlipleRevisions(array $revision_ids) {
     $revisions = array();
 
-    if (!empty($revision_ids)) {
-      // Sanitize IDs. Before feeding ID array into buildQuery, check whether
-      // it is empty as this would load all entities.
-      $revision_ids = $this->cleanIds($revision_ids, 'revision');
-    }
+    // Sanitize IDs. Before feeding ID array into buildQuery, check whether
+    // it is empty as this would load all entities.
+    $revision_ids = $this->cleanIds($revision_ids, 'revision');
 
-    if ($revision_ids === NULL || $revision_ids) {
+    if (!empty($revision_ids)) {
       // Build and execute the query.
       $query_result = $this->buildQuery(NULL, FALSE, $revision_ids)->execute();
       $records = $query_result->fetchAllAssoc($this->revisionKey);
@@ -708,7 +705,7 @@ protected function buildPropertyQuery(QueryInterface $entity_query, array $value
    * @param $revision_id
    *   The ID of the revision to load, or FALSE if this query is asking for the
    *   most current revision(s) and $revision_ids is not provided instead.
-   * @param $revision_ids
+   * @param array $revision_ids
    *   Revision IDs to load.
    *
    * @return \Drupal\Core\Database\Query\Select