src/transformers/models/vit_hybrid/modeling_vit_hybrid.py/ViTHybridAttention/__init__
class ViTHybridAttention:    def __init__(self, config: ViTHybridConfig) -> None:
        super().__init__()
        self.attention = ViTHybridSelfAttention(config)
        self.output = ViTHybridSelfOutput(config)
        self.pruned_heads = set()