code: def test_init_from_exp(self):
      c = init_class_from_exp(
          "monai.transforms.LoadImaged(keys='image')"
      )
      assert c
  
file_path: MONAILabel/tests/unit/utils/test_class_utils.py
imports: import os
  import unittest
  import monailabel.interfaces
  import monailabel.transform.post
  from monailabel.utils.others.class_utils import class_args_to_exp, get_class_names, get_class_of_subclass_from_file, init_class_from_exp
label_desc: Use image node_id 3 for calling the MyTestCase obj's underlying member method code with example usage: obj.test_init_from_exp() without return types