[#6905] rewrite code example to cover the setter

xabbuh · xabbuh · commit 430f932e4ac0 · 2016-09-21T18:53:01.000+02:00
diff --git a/service_container/optional_dependencies.rst b/service_container/optional_dependencies.rst
@@ -120,10 +120,10 @@ call if the service exists and remove the method call if it does not:
         ));
 
 In YAML, the special ``@?`` syntax tells the service container that the dependency
-is optional. Of course, the ``NewsletterManager`` must also be rewritten to
-allow for an optional dependency::
+is optional. Of course, the ``NewsletterManager`` must also be rewritten by
+adding a ``setMailer()`` method::
 
-        public function __construct(Mailer $mailer = null)
+        public function setMailer(Mailer $mailer)
         {
             // ...
         }

Original file line number	Diff line number	Diff line change
`@@ -120,10 +120,10 @@ call if the service exists and remove the method call if it does not:`
`120`	`120`	`));`
`121`	`121`
`122`	`122`	In YAML, the special ``@?`` syntax tells the service container that the dependency
`123`		-is optional. Of course, the ``NewsletterManager`` must 648A also be rewritten to
`124`		`-allow for an optional dependency::`
	`123`	+is optional. Of course, the ``NewsletterManager`` must also be rewritten by
	`124`	+adding a ``setMailer()`` method::
`125`	`125`
`126`		`- public function __construct(Mailer $mailer = null)`
	`126`	`+ public function setMailer(Mailer $mailer)`
`127`	`127`	`{`
`128`	`128`	`// ...`
`129`	`129`	`}`