code: def test_as_bytes(self, input_args, expected_output):
      self.assertEqual(
          example_serializer._as_bytes(input_args), expected_output
      )
  
imports: from absl.testing import parameterized
  import numpy
  import tensorflow
  from tensorflow_datasets import testing
  from tensorflow_datasets.core import example_serializer
  from tensorflow_datasets.core.features import feature
  from tensorflow_datasets.core.utils import py_utils
label_desc: Use image node_id 1 for calling the AsBytesTest obj's underlying member method code with example usage: obj.test_as_bytes(input_args, expected_output) without return types