code: def get_test_data_indices(self):
      if not self.test_data_indices:
          return SINGLE_TEST_DATUM_IDX
      return self.test_data_indices
  
imports: import math
  import numpy
  import torch
  from torch.distributions.utils import logits_to_probs
  from pyro.distributions.util import broadcast_shape
label_desc: Use image node_id 4 for calling the Fixture obj's underlying member method code with example usage: obj.get_test_data_indices() and returns: self, SINGLE_TEST_DATUM_IDX