code: def get_wsgi_app() -> Optional[dev_server.LitServerType]:
      """Returns a LitApp instance for consumption by gunicorn."""
      FLAGS.set_default("server_type", "external")
      FLAGS.set_default("demo_mode", True)
      # Parse flags without calling app.run(main), to avoid conflict with
      # gunicorn command line flags.
      unused = flags.FLAGS(sys.argv, known_only=True)
      if unused:
          logging.info(
              "simple_pytorch_demo:get_wsgi_app() called with unused "
              "args: %s",
              unused,
          )
      return main([])
  
imports: from collections.abc import Sequence
  import sys
  from typing import Optional
  from absl import app
  from absl import flags
  from absl import logging
  from lit_nlp import dev_server
  from lit_nlp import server_flags
  from lit_nlp.api import model
  from lit_nlp.api import types
  from lit_nlp.examples.datasets import glue
  from lit_nlp.lib import file_cache
  from lit_nlp.lib import utils
  import torch
  import transformers
label_desc: Use image node_id 2 for calling a global function with example usage: get_wsgi_app() and returns: main