title: Custom Jackson serializer of resteasy client
body: <p>Is it possible to register a custom Jackson JSON serializer for the resteasy client?</p>
  
  <p>I've tried to do something like:</p>
  
  <pre><code>ResteasyClient client = new ResteasyClientBuilder()
              .register(new CustomSerializer())
              .build();
  </code></pre>
  
  <p>But it didn't work. Any ideas?</p>