src/transformers/models/mobilebert/modeling_mobilebert.py/MobileBertForPreTraining/__init__
class MobileBertForPreTraining:    def __init__(self, config):
        super().__init__(config)
        self.mobilebert = MobileBertModel(config)
        self.cls = MobileBertPreTrainingHeads(config)

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