question: static boolean isRefreshNotificationRegistered ( NotificationListener client , RefreshNotificationType type ) { boolean isRegistered = false ; Map < RefreshNotificationType , Integer > notifications = null ; synchronized ( refreshClients ) { notifications = ( Map < RefreshNotificationType , Integer > ) refreshClients . get ( client ) ; } if ( notifications != null ) { Integer timerNotificationId = notifications . get ( type ) ; if ( timerNotificationId != null ) { isRegistered = true ; } } return isRegistered ; }
target:  Verifies a refresh notification for the specified client MBean. If notification is not registered, then returns a false