src/transformers/models/mobilebert/modeling_mobilebert.py/MobileBertForNextSentencePrediction/__init__
class MobileBertForNextSentencePrediction:    def __init__(self, config):
        super().__init__(config)

        self.mobilebert = MobileBertModel(config)
        self.cls = MobileBertOnlyNSPHead(config)

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