code: def _predict(self, item, add_one=False):
      if add_one:
          return {"x": item.x + 1}
      return item
  
file_path: modelkit/tests/test_auto_testing.py
imports: from typing import Dict
  import pydantic
  import pytest
  from modelkit.core.model import AsyncModel, Model
  from modelkit.testing import modellibrary_auto_test, modellibrary_fixture
label_desc: Use image node_id 1 for calling the TestableModel obj's underlying member method code with example usage: obj._predict(item, add_one) and returns: item, dict