code: def delete_fusion_layer(self, adapter_names: Union[List, str]):
      adapter_names = (
          adapter_names
          if isinstance(adapter_names, str)
          else ",".join(adapter_names)
      )
      if adapter_names in self.adapter_fusion_layer:
          del self.adapter_fusion_layer[adapter_names]
  
imports: from typing import Dict, List, Mapping, NamedTuple, Optional, Union
  import torch
  from torch import nn
  from ..composition import AdapterCompositionBlock, Average, BatchSplit, Fuse, Parallel, Split, Stack, adjust_tensors_for_parallel
  from ..configuration import BnConfig
  from ..context import ForwardContext
  from .adapter_layer_base import ComposableAdapterLayerBase
  from .modeling import Adapter, BertFusion, ParallelAdapter
label_desc: Use image node_id 7 for calling the BottleneckLayer obj's underlying member method code with example usage: obj.delete_fusion_layer(adapter_names) without return types