private void valueChanged(boolean on, boolean store) {
private void valueChanged(final boolean on, boolean store) {
	private void valueChanged(boolean on, boolean store) {		setChecked(on);		if (on)			fViewer.setSorter(fSorter);		else			fViewer.setSorter(null);		if (store)			JavaPlugin.getDefault().getPreferenceStore().setValue(fPreferenceKey, on);	}