title: How to dispatch a Job to a specific queue in Lumen 5.5
body: <p>In standard a job I use this method to dispatch a Job:</p>
  
  <pre><code>dispatch(new PurchaseJob($trxId, $method, $params));
  </code></pre>
  
  <p>Next I want to dispatch another Job to send email, but I want to split it to another separate queue.
  From what I read on Laravel 5.5 docs I could do this:</p>
  
  <pre><code>SendEmailJob::dispatch($userEmail)-&gt;onQueue('send_email');
  </code></pre>
  
  <p>But it does not seems to work on Lumen 5.5.</p>
  
  <p>What could I do to make this work or is there any other method that are not stated in the docs?</p>