code: def predict_step(self, state: State, data: torch.Tensor) -> None:
      return
  
file_path: tnt/tests/framework/test_unit.py
imports: import unittest
  from typing import Iterator
  import torch
  from torchtnt.framework._test_utils import get_dummy_train_state
  from torchtnt.framework.state import State
  from torchtnt.framework.unit import EvalUnit, PredictUnit, TrainUnit
label_desc: Use image node_id 4 for calling the TestUnit obj's underlying member method code with example usage: obj.predict_step(state, data) without return types