ServiceFeature</code> annotation annotated with
 this annotation MUST contain an
 <code>enabled</code> property of type
 <code>boolean</code> with a default value of <code>true</code>.
 <p>
 JAX-WS defines the following
 <code>WebServiceFeature</code> annotations (<code>Addressing</code>,
 <code>MTOM</code>, <code>RespectBinding</code>), however, an implementation
 may define vendors specific annotations for other features.
 <p>
 Annotations annotated with <code>WebServiceFeatureAnnotation</code> MUST
 have