title: Configure Jersey in Helidon MP
body: <p>I'd like to set the configuration property <code>org.glassfish.jersey.server.ServerProperties.UNWRAP_COMPLETION_STAGE_IN_WRITER_ENABLE</code> of Jersey to <code>true</code>.</p>
  <p>I've read the <a href="https://helidon.io/docs/latest/#/mp/jaxrs/02_server-configuration" rel="nofollow noreferrer">Helidon documentation about configuring the server</a> and tried to add the following to my <code>microprofile-config.properties</code>:</p>
  <pre><code>jersey.config.server.unwrap.completion.stage.writer.enable=true
  </code></pre>
  <p>But it looks like it is not accepted. How do I correctly set a configuration property for Jersey in Helidon MP?</p>