code: def get_app(self) -> tornado.web.Application:
      return tornado.web.Application(
          [(f"{MOCK_ENDPOINT}/(.*)", MediaFileHandler, {"path": ""})]
      )
  
file_path: streamlit/lib/tests/streamlit/web/server/media_file_handler_test.py
imports: from unittest import mock
  from unittest.mock import MagicMock
  import tornado.testing
  import tornado.web
  from parameterized import parameterized
  from typing_extensions import Final
  from streamlit.runtime.media_file_manager import MediaFileManager
  from streamlit.runtime.memory_media_file_storage import MemoryMediaFileStorage
  from streamlit.web.server.media_file_handler import MediaFileHandler
label_desc: Use image node_id 2 for calling the MediaFileHandlerTest obj's underlying member method code with example usage: obj.get_app() and returns: tornado