clarify the possible class/interface of the cache

xabbuh · xabbuh · commit 40273745ceca · 2019-05-08T11:57:35.000+02:00
When the fallback cache pool is returned (on PHP 5.6, HHVM, or when
Opcache is disabled), the configured service can be any implementation
of the CacheItemPoolInterface.
diff --git a/src/Symfony/Bundle/FrameworkBundle/Resources/config/serializer.xml b/src/Symfony/Bundle/FrameworkBundle/Resources/config/serializer.xml
@@ -82,7 +82,7 @@
             <tag name="kernel.cache_warmer" />
         </service>
 
-        <service id="serializer.mapping.cache.symfony" class="Symfony\Component\Cache\Adapter\PhpArrayAdapter">
+        <service id="serializer.mapping.cache.symfony" class="Psr\Cache\CacheItemPoolInterface">
             <factory class="Symfony\Component\Cache\Adapter\PhpArrayAdapter" method="create" />
             <argument>%serializer.mapping.cache.file%</argument>
             <argument type="service" id="cache.serializer" />
