e>

 <p>
 An observer method is a non-abstract method of a managed bean class or session bean class (or of an extension). An observer
 method may be either static or non-static. If the bean is a session bean, the observer method must be either a business
 method of the EJB or a static method of the bean class.
 </p>

 <p>
 Each observer method must have exactly one event parameter, of the same type as the event type it observes. Event qualifiers
 may be declared by annotating the event parameter. When searc