code: def test_value(self, input_param, img, expected_value):
      result = MeanEnsemble(**input_param)(img)
      assert_allclose(result, expected_value)
  
file_path: MONAI/tests/test_mean_ensemble.py
imports: from __future__ import annotations
  import unittest
  import numpy
  import torch
  from parameterized import parameterized
  from monai.transforms import MeanEnsemble
  from tests.utils import TEST_NDARRAYS, assert_allclose
label_desc: Use image node_id 1 for calling the TestMeanEnsemble obj's underlying member method code with example usage: obj.test_value(input_param, img, expected_value) without return types