code: def retrieve_and_parse_document(fid: str) -> Optional[Any]:
      
      document, status_code, ex = fetch_document(fid, extra_headers={'accept': 'application/activity+json'})
      if document:
          document = json.loads(decode_if_bytes(document))
          entities = message_to_objects(document, fid)
          if entities:
              return entities[0]
docs: Retrieve remote document by ID and return the entity.