title: JAXB what should be returned from `beforeMarshal(Marshaller)` method?
body: <p>First of all, I'm not talking about <a href="http://docs.oracle.com/javaee/5/api/javax/xml/bind/Marshaller.Listener.html" rel="nofollow">Marshaller#Listener</a>.
  I'm talking about those <code>class defined</code> event callbacks.</p>
  
  <p>Can anybody tell me what should be returned from <code>boolean beforeMarshal(Marshaller)</code> method?</p>
  
  <pre class="lang-java prettyprint-override"><code>/**
   * Where is apidocs for this method?
   * What should I return for this?
   */
  boolean beforeMarshal(Marshaller marshaller);
  </code></pre>
  
  <p>I mean, anyway, to use this method for converting <code>JPA's Long @Id to JAXB's String @XmlID</code> <strong>with JAXB-RI</strong> and <strong>without MOXy</strong>.</p>
  
  <p>[edited]
  a <code>void</code> version seems working though. is this just an documentation problem?</p>