code: def test_callable_combinefn_in_process(self):
      sum_fn = _SumCombineFn()
      self.assertEqual(sum_fn(list(range(4))), 6)
  
file_path: model-analysis/tensorflow_model_analysis/experimental/lazytf/core_test.py
imports: from absl.testing import absltest
  import apache_beam
  from apache_beam.testing import util
  from tensorflow_model_analysis.experimental.lazytf import core
label_desc: Use image node_id 1 for calling the CoreTest obj's underlying member method code with example usage: obj.test_callable_combinefn_in_process() without return types