code: def get_adapter(self, adapter_name: str):
      if adapter_name in self.adapters:
          return self.adapters[adapter_name]
      else:
          return None
  
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 10 for calling the BottleneckLayer obj's underlying member method code with example usage: obj.get_adapter(adapter_name) and returns: self, None