Error when running layers/test_layer.py

At line 44:
```bash
hidden_states, outputs = model.generate(**{'input_ids':inputs.input_ids, 'max_new_tokens':64})
```
There's an error: ValueError: not enough values to unpack (expected 2, got 1). I guess it means that model.generate( ) will only have one output, which is `outputs`, and can not get `hidden_states`. I'm wondering how to fix this issue. Thank you very much!

Start with layers/test_layer.py at line 44 and inspect the return contract of model.generate, focusing on why the assignment expects two values while the call returns one. Run the script after determining the intended outputs; done means the unpacking error is resolved and the layer test completes.

Written by the indexing model from the issue text.