code: def test_class_method(self):
      experiment = {"my_object": {"_name": "from_example_alias_name"}}
      e = ExperimentConfig(experiment)
      self.assertEqual(e["my_object"].param, 1)
  
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 5 for calling the RegistryTest obj's underlying member method code with example usage: obj.test_class_method() without return types