diff --git b/core/lib/Drupal/Core/Entity/EntityTypeBundleInfoInterface.php a/core/lib/Drupal/Core/Entity/EntityTypeBundleInfoInterface.php
index 3fbddec..5da66fc 100644
--- b/core/lib/Drupal/Core/Entity/EntityTypeBundleInfoInterface.php
+++ a/core/lib/Drupal/Core/Entity/EntityTypeBundleInfoInterface.php
@@ -3,12 +3,12 @@
 namespace Drupal\Core\Entity;
 
 /**
- * Provides entity type bundle information.
+ * Provides an interface for an entity type bundle info.
  */
 interface EntityTypeBundleInfoInterface {
 
   /**
-   * Gets the bundle info of all entity types.
+   * Get the bundle info of all entity types.
    *
    * @return array[]
    *   Keys are entity type IDs. Values are arrays of which keys are bundle
@@ -38,7 +38,7 @@ public function getAllBundleInfo();
   public function getBundleInfo($entity_type);
 
   /**
-   * Clears cached bundle information.
+   * Clears static and persistent bundles.
    */
   public function clearCachedBundles();