code: def mock_function2():
      return 2
  
imports: import unittest
  from pathlib import Path
  from typing import Any, Dict, List
  from transfer_nlp.plugins.config import CallableInstantiationError, ExperimentConfig, LoopInConfigError, UnknownPluginException, UnknownReferenceError, register_plugin
label_desc: Use image node_id 3 for calling a global function with example usage: mock_function2() and returns: int