title: How to access an autowired Controller like an Service
body: <p>I have a controller <code>ContactController</code> that is registered as an service.</p>
  <pre><code>  CoreBundle\Controller\:
      resource: '../../Controller/'
      tags: ['controller.service_arguments']
  </code></pre>
  <p>When I try to access the ContactController, I get the following error message:</p>
  <blockquote>
  <p>Service &quot;ContactBundle\Controller\ContactController&quot; not found: even though it exists in the app's container, the container inside &quot;App\Controller\AppController&quot; is a smaller service locator that only knows about the &quot;doctrine&quot;, &quot;form.factory&quot;, &quot;http_kernel&quot;, &quot;parameter_bag&quot;, &quot;request_stack&quot;, &quot;router&quot;, &quot;security.authorization_checker&quot;, &quot;security.csrf.token_manager&quot;, &quot;security.token_storage&quot;, &quot;session&quot; and &quot;twig&quot; services. Try using dependency injection instead.</p>
  </blockquote>
  <p>How can I access this service?</p>