feat(info): progress on type advantages/disadvantages

Author: Guikingone

service_container/injection_types.rst

@@ -322,6 +322,11 @@ which allow the container to return the newly created service:
         $container->register('app.newsletter_manager', NewsletterManager::class)
             ->addMethodCall('withMailer', [new Reference('mailer')], true);
 
+.. note::
+
+    This type of injection require that you add a `@return static` docblock in order
+    to be capable of understanding the method usage.
+
 This approach is useful if you need to configure your service according to your needs, 
 so, what are the advantages?
 
@@ -338,3 +343,12 @@ so, what are the advantages?
 
 * As the method automatically receive and set the attribute value,
   you couldn't obtain the newly created service without this dependency.
+
+The disadvantages are:
+
+* As the `@return static` docblock is required by the container to
+  understand that the method return a cloned object, you can
+  found that adding docblock for a single method isn't adapted.
+
+* As a new object is created once the method is called,
+  you can found hard to debug and test your code.