There is no API reference for the new `ModelTrainer`. A search for ModelTrainer turns up nothing. <img width="823" height="529" alt="Image" src="https://github.com/user-attachments/assets/c08065b8-5282-4860-a28e-ab1a673b4ca1" /> --- (Searches for other classes e.g. `LLMAsJudgeEvaluator` produce results.) <img width="835" height="457" alt="Image" src="https://github.com/user-attachments/assets/5222f4a5-8a9f-4eaf-893c-6714bb524c27" />