class_docstr: Class to replace UUID with str instance and hex attribute.
class_docstr_tok: ["Class","to","replace","UUID","with","str","instance","and","hex","attribute","."]
code: def hex(self):
      return str(self)
  
file_path: lightning-flash/tests/conftest.py
imports: import os
  import pathlib
  import shutil
  import pytest
  import torch
  from flash.core.serve.decorators import uuid4
  from flash.core.utilities.imports import _TOPIC_SERVE_AVAILABLE, _TORCHVISION_AVAILABLE
  from pytest_mock import MockerFixture
label_desc: Use image node_id 1 for calling the UUID_String obj's underlying member method code with example usage: obj.hex() and returns: str