code: def test_image_to_text(self):
      io = gr.load("models/nlpconnect/vit-gpt2-image-captioning")
      try:
          output = io("gradio/test_data/lion.jpg")
          assert isinstance(output, str)
      except TooManyRequestsError:
          pass
  
imports: import os
  import tempfile
  import textwrap
  import warnings
  from pathlib import Path
  from unittest.mock import MagicMock, patch
  import pytest
  from fastapi.testclient import TestClient
  from gradio_client import media_data
  from huggingface_hub import HfFolder
  import gradio
  from gradio.context import Context
  from gradio.exceptions import GradioVersionIncompatibleError, InvalidApiNameError
  from gradio.external import TooManyRequestsError, cols_to_rows, get_tabular_examples
label_desc: Use image node_id 24 for calling the TestLoadInterface obj's underlying member method code with example usage: obj.test_image_to_text() without return types