* and will be called in sequence during model building.
 * <p>
 * Example usage:
 * <pre>
 * public class CustomModelTransformer implements ModelTransformer {
 *     public Model transformEffectiveModel(Model model) throws ModelTransformerException {
 *         // Add a custom property to all models
 *         model.getProperties().put("custom.timestamp", System.currentTimeMillis());
 *         return model;
 *     }