code: def find_in_index(
      identifier: str,
      model_name: str,
      adapter_config: Optional[dict] = None,
      strict: bool = False,
      index_file: str = None,
  ) -> Optional[str]:
      identifier = identifier.strip()
      # identifiers of form "@<org>/<file>" are unique and can be retrieved directly
      match = re.match(r"@(\S+)\/(\S+)", identifier)
      if match:
          return ADAPTER_HUB_ADAPTER_ENTRY_JSON.format(
              match.group(1), match.group(2)
          )
  
      if not index_file:
          index_file = download_cached(
              ADAPTER_HUB_INDEX_FILE.format(model_name)
          )
      if not index_file:
          raise EnvironmentError(
              "Unable to load adapter hub index file. The file might be temporarily unavailable."
          )
      with open(index_file, "r") as f:
          adapter_index = json.load(f)
      # split into <task>/<subtask>@<org>
      task, subtask, org = _split_identifier(identifier)
      # find all entries for this task and subtask
      entries = list(_dict_extract(adapter_index, task, subtask))
      if not entries:
          # we found no matching entry
          return None
      elif len(entries) == 1:
          index_entry = entries[0]
      else:
          # there are multiple possible options for this identifier
          raise ValueError(
              "Found multiple possible adapters matching '{}'.".format(
                  identifier
              )
          )
      # go on with searching a matching adapter_config hash in the task entry
      if adapter_config:
          config_hash = get_adapter_config_hash(adapter_config)
          if config_hash in index_entry:
              # now match the org if given
              hub_entry = _get_matching_version(
                  index_entry[config_hash], org
              )
              if hub_entry:
                  logger.info(
                      "Found matching adapter at: {}".format(hub_entry)
                  )
              return hub_entry
      # if we're here, no matching config is available or no config was given
      if not adapter_config or not strict:
          if "default" in index_entry:
              logger.info(
                  "No exactly matching adapter config found for this specifier, falling back to default."
              )
              return index_entry["default"]
          # there's only one possible config and we allow matches with different configs
          elif len(index_entry) == 1:
              logger.info(
                  "Only one configuration available for this adapter, using default."
              )
              config_entry = list(index_entry.values())[0]
              return _get_matching_version(config_entry, org)
      raise ValueError(
          "No adapter '{}' found for the current model or configuration.".format(
              identifier
          )
      )
  
imports: import ast
  import fnmatch
  import hashlib
  import inspect
  import io
  import json
  import logging
  import os
  import re
  import shutil
  import tarfile
  import tempfile
  from collections.abc import Mapping
  from contextlib import contextmanager
  from dataclasses import dataclass
  from enum import Enum
  from functools import partial
  from os.path import basename, isdir, isfile, join
  from pathlib import Path
  from typing import Callable, Dict, List, Optional, Tuple, Union
  from urllib.parse import urlparse
  from zipfile import ZipFile, is_zipfile
  import torch
  import requests
  from filelock import FileLock
  from huggingface_hub import HfApi, HfFolder, snapshot_download
  from huggingface_hub.file_download import http_get, url_to_filename
  from huggingface_hub.utils import EntryNotFoundError, RepositoryNotFoundError, RevisionNotFoundError, hf_raise_for_status
  from requests.exceptions import HTTPError
  from transformers.utils import http_user_agent, is_remote_url
  from transformers.utils.hub import torch_cache_home
  from .None import __version__
  from .context import ForwardContext
label_desc: Use image node_id 12 for calling a global function with example usage: find_in_index(identifier, model_name, adapter_config, strict, index_file) and returns: ADAPTER_HUB_ADAPTER_ENTRY_JSON, None, hub_entry, index_entry, _get_matching_version