[DependencyInjection] Show how to get $myService

Author: tacman

service_container/service_subscribers_locators.rst

@@ -467,6 +467,8 @@ will share identical locators among all the services referencing them::
             // ...
             'logger' => new Reference('logger'),
         ];
+        
+        $myService = $container->findDefinition(MyService::class);
 
         $myService->addArgument(ServiceLocatorTagPass::register($container, $locateableServices));
     }