code: def __getitem__(
      self,
      gcs_requester_pays_configuration: MaybeGCSRequesterPaysConfiguration,
  ) -> FS:
      frozen_key = self._freeze_key(gcs_requester_pays_configuration)
      fs = self._dict.get(frozen_key)
      if fs is None:
          if gcs_requester_pays_configuration is None:
              kwargs = self._default_kwargs
          else:
              kwargs = {
                  "gcs_kwargs": {
                      "gcs_requester_pays_configuration": gcs_requester_pays_configuration
                  }
              }
          fs = self._fs_constructor(**kwargs)
          self._dict[frozen_key] = fs
      return fs
  
imports: from typing import Any, Dict, FrozenSet, Optional, Tuple, Type, TypeVar, Union, Generic
  from hailtop.aiocloud.aiogoogle import GCSRequesterPaysConfiguration
label_desc: Use image node_id 2 for calling the GCSRequesterPaysFSCache obj's underlying member method code with example usage: obj.__getitem__(gcs_requester_pays_configuration) and returns: fs