src/transformers/models/pegasus/modeling_tf_pegasus.py/TFPegasusForConditionalGeneration/prepare_decoder_input_ids_from_labels
class TFPegasusForConditionalGeneration:    def prepare_decoder_input_ids_from_labels(self, labels: tf.Tensor):
        return shift_tokens_right(labels, self.config.pad_token_id, self.config.decoder_start_token_id)