code: def data(self, classifier_data):
      return classifier_data
  
imports: from unittest.mock import Mock
  import numpy
  import pytest
  import torch
  from scipy.special import expit
  from sklearn.base import clone
  from torch import nn
  from skorch.tests.conftest import INFERENCE_METHODS
label_desc: Use image node_id 1 for calling the TestNeuralNet obj's underlying member method code with example usage: obj.data(classifier_data) and returns: classifier_data