src/transformers/models/qdqbert/modeling_qdqbert.py/QDQBertForNextSentencePrediction/__init__
class QDQBertForNextSentencePrediction:    def __init__(self, config):
        super().__init__(config)

        self.bert = QDQBertModel(config)
        self.cls = QDQBertOnlyNSPHead(config)

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