code: def test_nan_value_is_not_serializable(self):
      self.assertFalse(
          json_format_compat.is_serializable_value(
              struct_pb2.Value(number_value=float("nan"))
          )
      )
  
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 3 for calling the TestCase obj's underlying member method code with example usage: obj.test_nan_value_is_not_serializable() without return types