src/transformers/models/bridgetower/modeling_bridgetower.py/BridgeTowerAttention/__init__
class BridgeTowerAttention:    def __init__(self, config, position_embedding_type=None):
        super().__init__()
        self.self = BridgeTowerSelfAttention(config, position_embedding_type=position_embedding_type)
        self.output = BridgeTowerSelfOutput(config)
        self.pruned_heads = set()