src/transformers/models/dpt/modeling_dpt.py/DPTViTAttention/__init__
class DPTViTAttention:    def __init__(self, config: DPTConfig) -> None:
        super().__init__()
        self.attention = DPTViTSelfAttention(config)
        self.output = DPTViTSelfOutput(config)
        self.pruned_heads = set()