code: def _predict_batch(self, items, **_):
      return callback_func(items)
  
file_path: modelkit/tests/test_batching.py
imports: import asyncio
  import pytest
  from modelkit.core.model import AsyncModel, Model
label_desc: Use image node_id 1 for calling the SomeModel obj's underlying member method code with example usage: obj._predict_batch(items) and returns: callback_func