}
}
Control control = fProviderControls.get(id);
if (control == null) {
control = prefs.createControl(fGroup);
if (control == null) {
final String message = PreferencesMessages.FoldingConfigurationBlock_info_no_preferences;
control = new ErrorPreferences(message).createControl(fGroup);
} else {
fProviderControls.put(id, control);