This method level annotation can be used to decorate a Java method that wishes to be called when a web socket session
 is closing.
 
The method may only take the following parameters:-
- optional 
Sessionparameter - optional 
CloseReasonparameter - Zero to n String parameters annotated with the 
jakarta.websocket.server.PathParamannotation. 
 The parameters may appear in any order. See Endpoint.onClose(jakarta.websocket.Session, jakarta.websocket.CloseReason) for more details on how the session parameter
 may be used during method calls annotated with this annotation.