code: def cache(subsection):
      """
      Retrieves or initializes a cache for a specific subsection.
  
      Parameters:
          subsection (str): The subsection identifier for the cache.
  
      Returns:
          dict: The cache data for the specified subsection.
      """
  
      global cache_data
  
      if cache_data is None:
          with cache_lock:
              if cache_data is None:
                  if not os.path.isfile(cache_filename):
                      cache_data = {}
                  else:
                      try:
                          with open(
                              cache_filename, "r", encoding="utf8"
                          ) as file:
                              cache_data = json.load(file)
                      except Exception:
                          os.replace(
                              cache_filename,
                              os.path.join(
                                  script_path, "tmp", "cache.json"
                              ),
                          )
                          print(
                              "[ERROR] issue occurred while trying to read cache.json, move current cache to tmp/cache.json and create new cache"
                          )
                          cache_data = {}
  
      s = cache_data.get(subsection, {})
      cache_data[subsection] = s
  
      return s
  
file_path: stable-diffusion-webui/modules/cache.py
imports: import json
  import os
  import os.path
  import threading
  import time
  from modules.paths import data_path, script_path
label_desc: Use image node_id 2 for calling a global function with example usage: cache(subsection) and returns: s