protected AuthorizationService getAuthorizationService() {
        SecurityService securityService = securityServiceRef.getService();
        return (securityService != null) ? securityService.getAuthorizationService() : null;
    }
protected AuthorizationService getAuthorizationService ( ) { SecurityService securityService = securityServiceRef . getService ( ) ; return ( securityService != null ) ? securityService . getAuthorizationService ( ) : null ; }
@return the Authz service; or null if no authz service is available.