@Nullable
private static <S> ArtifactPropertiesState serializeProperties(
ArtifactPropertiesProvider provider, ArtifactProperties<S> properties) {
final ArtifactPropertiesState state = new ArtifactPropertiesState();
state.setId(provider.getId());
final Element options = new Element("options");
XmlSerializer.serializeInto(
properties.getState(), options, new SkipDefaultValuesSerializationFilters());
if (options.getContent().isEmpty() && options.getAttributes().isEmpty()) return null;
state.setOptions(options);
return state;
}
