code: def test_empty_value_is_serializable(self):
      self.assertTrue(
          json_format_compat.is_serializable_value(struct_pb2.Value())
      )
  
file_path: tensorboard/tensorboard/plugins/hparams/json_format_compat_test.py
imports: from absl.testing import absltest
  from google.protobuf import struct_pb2
  from tensorboard.plugins.hparams import json_format_compat
label_desc: Use image node_id 2 for calling the TestCase obj's underlying member method code with example usage: obj.test_empty_value_is_serializable() without return types