title: Gaufrette use Service Adapter
body: <p>I use KnpGaufrette Bundle and I'd like to use the service adapter.# </p>
  
  <p><a href="https://github.com/KnpLabs/KnpGaufretteBundle/blob/master/Resources/docs/adapters/service.md" rel="nofollow noreferrer">https://github.com/KnpLabs/KnpGaufretteBundle/blob/master/Resources/docs/adapters/service.md</a></p>
  
  <pre><code>app/config/config.yml
  knp_gaufrette:
      adapters:
          foo:
              service:
                  id:     my.adapter.service
  </code></pre>
  
  <p>But I'dont know how to start to create my own gaufrette adapter (my.adapter.service)in my projet. Can you please give me an hint.</p>
  
  <p>Thanks</p>