Introduced for Tapestry 5.3, contains new methods to provide access to annotations on the class,
and on methods of the class. In rare cases, the same annotation type will appear on the service interface
and on the class (or method implementation in the class); the implementation annotation always
has precedence over the interface annotation.
Returns the service implementation associated with this service. When creating the proxies
for the service interface, the implementation of the service interface methods will
receive the annotations of the corresponding method in the service interface.