src/transformers/modeling_utils.py/PreTrainedModel/get_output_embeddings
class PreTrainedModel:    def get_output_embeddings(self) -> nn.Module:
        """
        Returns the model's output embeddings.

        Returns:
            :obj:`nn.Module`: A torch module mapping hidden states to vocabulary.
        """
        return None  # Overwrite for models with output embeddings