Add more specific typehint for EntityStorageInterface::loadMultiple() (#827)

* Add more specific typehint for EntityStorageInterface::loadMultiple()

* Add stub for ::resetCache() as well.

* Add return type for reset cache and make both method with explicit typehints

---------

Co-authored-by: Matt Glaman <[email protected]>

Author: Niklan

stubs/Drupal/Core/Entity/EntityStorageInterface.stub

@@ -4,4 +4,15 @@ namespace Drupal\Core\Entity;
 
 interface EntityStorageInterface {
 
+  /**
+   * @param array<int|string>|null $ids
+   * @return \Drupal\Core\Entity\EntityInterface[]
+   */
+  public function loadMultiple(?array $ids = NULL): array;
+
+  /**
+   * @param array<int|string>|null $ids
+   */
+  public function resetCache(?array $ids = NULL): void;
+
 }