code: def test_fantasy_call_batch_inducing(self):
      return self.test_fantasy_call(
          model_batch_shape=(torch.Size([3]) + self.batch_shape),
          data_batch_shape=self.batch_shape,
          inducing_batch_shape=(torch.Size([3]) + self.batch_shape),
          expected_batch_shape=(torch.Size([3]) + self.batch_shape),
      )
  
imports: from abc import abstractproperty
  from unittest.mock import MagicMock, patch
  import linear_operator
  import torch
  import gpytorch
  from .base_test_case import BaseTestCase
label_desc: Use image node_id 21 for calling the VariationalTestCase obj's underlying member method code with example usage: obj.test_fantasy_call_batch_inducing() and returns: self