title: Equivalent to @XmlElement.required in @XmlPath in EclipseLink MOXy
body: <p>How to implement <code>@XmlElement.required</code> flag using <code>@XmlPath</code> annotation in <a href="http://www.eclipse.org/eclipselink/moxy.php" rel="nofollow"><strong>EclipseLink MOXy</strong></a> 2.4.1 version?</p>