*/
public void notifyListeners(final PlotChangeEvent event) {
final Object[] listeners = this.listenerList.getListeners();
for (int i = 0; i < listeners.length; i++) {
final PlotChangeListener listener = (PlotChangeListener) listeners[i];
listener.plotChanged(event);
}
}
/**
* Unregisters an object for notification of changes to the plot.