code: def likelihood_cls(self):
      return likelihood_cls
  
imports: import unittest
  import torch
  import gpytorch
  from gpytorch.test.variational_test_case import VariationalTestCase
label_desc: Use image node_id 3 for calling the TestBatchDecoupledVariationalGP obj's underlying member method code with example usage: obj.likelihood_cls() and returns: likelihood_cls