That's it! Thanks to the ``AppBundle\`` line and ``resource`` key below it,all

classesin the ``src/AppBundle/Service`` directory (and a few other directories)

will automatically be added to the container.

That's it! Thanks to the ``AppBundle\`` line and ``resource`` key below it,a service

will be registered for each classin the ``src/AppBundle/Service`` directory (and

the other directories listed).

Each service's "key" is its class name. You can use it immediately inside your controller::

That's it! The container will *automatically* know to pass the ``logger`` service

when instantiating the ``MessageGenerator``? How does it know to do this?

when instantiating the ``MessageGenerator``. How does it know to do this?

:doc:`Autowiring</service_container/autowiring>`. The key is the ``LoggerInterface``

type-hint in your ``__construct()`` method and the ``autowire: true`` config in

``services.yml``. When you type-hint an argument, the container will automatically

find the matching service. If it can't or there is anyambuiguity, you'll see a clear

find the matching service. If it can't or there is anyambiguity, you'll see a clear

exception suggesting how to fix it.

Be sure to read more about:doc:`autowiring</service_container/autowiring>`.