code: def test_deepspeed_engine_is_steppable(engine):
      """Test that the ``DeepSpeedEngine`` conforms to the Steppable API.
  
      If this fails, then optimization will be broken for DeepSpeed.
  
      """
      assert isinstance(engine, Steppable)
  
file_path: pytorch-lightning/tests/tests_fabric/plugins/precision/test_deepspeed.py
imports: from unittest import mock
  from unittest.mock import Mock
  import pytest
  import torch
  from lightning.fabric.plugins.precision.deepspeed import DeepSpeedPrecision
  from lightning.fabric.utilities.types import Steppable
  from tests_fabric.helpers.runif import RunIf
label_desc: Use image node_id 3 for calling a global function with example usage: test_deepspeed_engine_is_steppable(engine) without return types