code: def get_cached_placeholder_output(parent_object, placeholder_name):
      
      if not PlaceholderRenderingPipe.may_cache_placeholders():
          return None
  
      language_code = get_parent_language_code(parent_object)
      cache_key = get_placeholder_cache_key_for_parent(parent_object, placeholder_name, language_code)
      return cache.get(cache_key)
docs: Return cached output for a placeholder, if available.
      This avoids fetching the Placeholder object.