src/main/java/org/jivesoftware/smack/debugger/LiteDebugger.java
public void rootWindowClosing(WindowEvent evt) {
        connection.removePacketListener(listener);
        ((ObservableReader) reader).removeReaderListener(readerListener);
        ((ObservableWriter) writer).removeWriterListener(writerListener);
    }
public void rootWindowClosing(WindowEvent evt) {
        connection.removePacketListener(listener);
        ((ObservableReader) reader).removeReaderListener(readerListener);
        ((ObservableWriter) writer).removeWriterListener(writerListener);
    }
Notification that the root window is closing. Stop listening for received
and transmitted packets.

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