code: def _load(self) -> None:
      self.model = "a cool model"
  
file_path: traintool/tests/test_model_wrapper.py
imports: from fastapi.testclient import TestClient
  import numpy
  from traintool.model_wrapper import ModelWrapper
label_desc: Use image node_id 2 for calling the DummyWrapper obj's underlying member method code with example usage: obj._load() without return types