binder.addAll(
bindSelectionOf(btnOneDirectoryOnly).to(factory.newBooleanPreference(FILES_IN_ONE_DIRECTORY_ONLY)),
bindSelectionOf(btnMultipleDirectories).to(factory.newBooleanPreference(FILES_IN_MULTIPLE_DIRECTORIES))
);
final Preference<String> directoryPaths = factory.newStringPreference(DIRECTORY_PATHS);
binder.add(new Binding() {
@Override public void applyPreferenceValueToTarget() {
setDirectoryPaths(directoryPaths.value());
}
@Override public void applyDefaultPreferenceValueToTarget() {