Updated Drupal to 8.6. This goes with the following updates because it's possible...

[yaffs-website] / web / core / lib / Drupal / Core / Cache / MemoryCache / MemoryCacheInterface.php

diff --git a/web/core/lib/Drupal/Core/Cache/MemoryCache/MemoryCacheInterface.php b/web/core/lib/Drupal/Core/Cache/MemoryCache/MemoryCacheInterface.php
new file mode 100644 (file)
index 0000000..c794ea1
--- /dev/null
+++ b/web/core/lib/Drupal/Core/Cache/MemoryCache/MemoryCacheInterface.php
@@ -0,0 +1,18 @@
+<?php
+
+namespace Drupal\Core\Cache\MemoryCache;
+
+use Drupal\Core\Cache\CacheBackendInterface;
+use Drupal\Core\Cache\CacheTagsInvalidatorInterface;
+
+/**
+ * Defines an interface for memory cache implementations.
+ *
+ * This has additional requirements over CacheBackendInterface and
+ * CacheTagsInvalidatorInterface. Objects stored must be the same instance when
+ * retrieved from cache, so that this can be used as a replacement for protected
+ * properties and similar.
+ *
+ * @ingroup cache
+ */
+interface MemoryCacheInterface extends CacheBackendInterface, CacheTagsInvalidatorInterface {}