src/transformers/models/mbart/modeling_mbart.py/MBartForSequenceClassification/__init__
class MBartForSequenceClassification:    def __init__(self, config: MBartConfig, **kwargs):
        super().__init__(config, **kwargs)
        self.model = MBartModel(config)
        self.classification_head = MBartClassificationHead(
            config.d_model,
            config.d_model,
            config.num_labels,
            config.classifier_dropout,
        )

        # Initialize weights and apply final processing
        self.post_init()