code: def test_training_iteration_batch_data(self):
      # We need different batch sizes than the superclass
      return self.test_training_iteration(
          model_batch_shape=self.batch_shape,
          inducing_batch_shape=self.batch_shape,
          expected_batch_shape=(self.batch_shape),
      )
  
imports: import unittest
  import torch
  import gpytorch
  from gpytorch.test.variational_test_case import VariationalTestCase
label_desc: Use image node_id 12 for calling the TestVNNGP obj's underlying member method code with example usage: obj.test_training_iteration_batch_data() and returns: self