Added a hint about the file path

Toflar · Toflar · commit 0e3d337e5e1e · 2017-09-01T15:05:35.000+02:00
diff --git a/doc/symfony-cache-configuration.rst b/doc/symfony-cache-configuration.rst
@@ -30,6 +30,8 @@ Using the trait
 Your ``AppCache`` needs to implement ``CacheInvalidation`` and use the
 trait ``FOS\HttpCache\SymfonyCache\EventDispatchingHttpCache``::
 
+    // app/AppCache.php
+
     use FOS\HttpCache\SymfonyCache\CacheInvalidation;
     use FOS\HttpCache\SymfonyCache\EventDispatchingHttpCache;
     use Symfony\Component\HttpFoundation\Request;
