title: Messenger with multiple buses
body: <p>I have multiple buses </p>
  
  <pre><code>framework:
      messenger:
          default_bus: messenger.bus.command
          buses:
              messenger.bus.command: ~
              messenger.bus.query: ~
  </code></pre>
  
  <p>In my unit tests I have something like that</p>
  
  <pre><code>$this-&gt;commandBus = static::$container-&gt;get('messenger.bus.command');
  </code></pre>
  
  <p>I get </p>
  
  <blockquote>
    <p>Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException:
    The "messenger.bus.command" service or alias has been removed or
    inlined when the container was compiled. You should either make it
    public, or stop using the container directly and use dependency
    injection instead.</p>
  </blockquote>
  
  <p>How to fix it? Thanks.</p>