src/transformers/models/funnel/modeling_funnel.py/FunnelDecoder/__init__
class FunnelDecoder:    def __init__(self, config: FunnelConfig) -> None:
        super().__init__()
        self.config = config
        self.attention_structure = FunnelAttentionStructure(config)
        self.layers = nn.ModuleList([FunnelLayer(config, 0) for _ in range(config.num_decoder_layers)])