code: def __getitem__(self, key: Union[str, int]) -> EnclaveClient:  # type: ignore
      if isinstance(key, int):
          return self.create_client(enclave=self.online_enclaves[key])
      else:
          on = self.online_enclaves
          for enclave in on:
              if enclave["name"] == key:
                  return self.create_client(enclave=enclave)
      raise KeyError(f"Invalid key: {key} for {on}")
  
imports: from __future__ import annotations
  from concurrent import futures
  from typing import Any
  from typing import Dict
  from typing import List
  from typing import Optional
  from typing import TYPE_CHECKING
  from typing import Tuple
  from typing import Union
  import pandas
  import requests
  from ..service.metadata.node_metadata import NodeMetadataJSON
  from ..service.network.network_service import NodePeer
  from ..service.response import SyftException
  from ..types.grid_url import GridURL
  from ..util.constants import DEFAULT_TIMEOUT
  from ..util.logger import error
  from ..util.logger import warning
  from .enclave_client import EnclaveClient
label_desc: Use image node_id 6 for calling the EnclaveRegistry obj's underlying member method code with example usage: obj.__getitem__(key) and returns: self, self