src/transformers/models/bridgetower/modeling_bridgetower.py/BridgeTowerForMaskedLM/__init__
class BridgeTowerForMaskedLM:    def __init__(self, config):
        super().__init__(config)

        self.bridgetower = BridgeTowerModel(config)
        self.mlm_score = BridgeTowerMLMHead(config)

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