* @see org.eclipse.ui.preferences.IWorkingCopyManager#applyChanges()
*/
public void applyChanges() throws BackingStoreException {
for (Iterator i = workingCopies.values().iterator(); i.hasNext();) {
WorkingCopyPreferences prefs = (WorkingCopyPreferences) i.next();
if (prefs.nodeExists(EMPTY_STRING))
prefs.flush();
}
}
}