private synchronized void rootWindowClosing(WindowEvent evt) {
        // Notify to all the debuggers to stop debugging
        for (EnhancedDebugger debugger : debuggers) {
            debugger.cancel();
        }
        // Release any reference to the debuggers
        debuggers.clear();
        // Release the default instance
        instance = null;
        frame = null;
        notifyAll();
    }
private synchronized void rootWindowClosing ( WindowEvent evt ) { for ( EnhancedDebugger debugger : debuggers ) { debugger . cancel ( ) ; } debuggers . clear ( ) ; instance = null ; frame = null ; notifyAll ( ) ; }
Notification that the root window is closing. Stop listening for received and
transmitted packets in all the debugged connections.

@param evt the event that indicates that the root window is closing