src/transformers/models/mbart/modeling_tf_mbart.py/TFMBartForConditionalGeneration/prepare_decoder_input_ids_from_labels
class TFMBartForConditionalGeneration:    def prepare_decoder_input_ids_from_labels(self, labels: tf.Tensor):
        return shift_tokens_right(labels, self.config.pad_token_id)