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diff --git a/web/core/lib/Drupal/Core/Entity/RevisionableStorageInterface.php b/web/core/lib/Drupal/Core/Entity/RevisionableStorageInterface.php
new file mode 100644
index 000000000..d23808b1b
--- /dev/null
+++ b/web/core/lib/Drupal/Core/Entity/RevisionableStorageInterface.php
@@ -0,0 +1,68 @@
+<?php
+
+namespace Drupal\Core\Entity;
+
+/**
+ * A storage that supports revisionable entity types.
+ */
+interface RevisionableStorageInterface {
+
+  /**
+   * Creates a new revision starting off from the specified entity object.
+   *
+   * @param \Drupal\Core\Entity\EntityInterface|\Drupal\Core\Entity\RevisionableInterface $entity
+   *   The revisionable entity object being modified.
+   * @param bool $default
+   *   (optional) Whether the new revision should be marked as default. Defaults
+   *   to TRUE.
+   *
+   * @return \Drupal\Core\Entity\EntityInterface|\Drupal\Core\Entity\RevisionableInterface
+   *   A new entity revision object.
+   */
+  public function createRevision(RevisionableInterface $entity, $default = TRUE);
+
+  /**
+   * Loads a specific entity revision.
+   *
+   * @param int $revision_id
+   *   The revision ID.
+   *
+   * @return \Drupal\Core\Entity\EntityInterface|null
+   *   The specified entity revision or NULL if not found.
+   */
+  public function loadRevision($revision_id);
+
+  /**
+   * Loads multiple entity revisions.
+   *
+   * @param array $revision_ids
+   *   An array of revision IDs to load.
+   *
+   * @return \Drupal\Core\Entity\EntityInterface[]
+   *   An array of entity revisions keyed by their revision ID, or an empty
+   *   array if none found.
+   */
+  public function loadMultipleRevisions(array $revision_ids);
+
+  /**
+   * Deletes a specific entity revision.
+   *
+   * A revision can only be deleted if it's not the currently active one.
+   *
+   * @param int $revision_id
+   *   The revision ID.
+   */
+  public function deleteRevision($revision_id);
+
+  /**
+   * Returns the latest revision identifier for an entity.
+   *
+   * @param int|string $entity_id
+   *   The entity identifier.
+   *
+   * @return int|string|null
+   *   The latest revision identifier or NULL if no revision could be found.
+   */
+  public function getLatestRevisionId($entity_id);
+
+}