symfony/symfony-docs — pull request #2160 by richardmiller (2013-01-20 20:19:43+00:00)
Title: Moving registering extension above loading config in DI code sample

| Q | A
| ------------------- | ---
| Doc fix? | yes
| New docs? | no
| Applies to | all

As it was an exception would have been thrown with the example as no extension would have been registered to process the config when is it was loaded.