code: def assertIsNotAFeature(self, label, example):
      self.assertNotIn(label, example.features.feature)
  
file_path: deepvariant/deepvariant/dv_utils_using_clif_test.py
imports: from unittest import mock
  from absl.testing import absltest
  from absl.testing import parameterized
  import tensorflow
  from deepvariant import dv_utils
  from deepvariant import dv_utils_using_clif
  from third_party.nucleus.protos import variants_pb2
label_desc: Use image node_id 5 for calling the DVUtilsUsingClifTest obj's underlying member method code with example usage: obj.assertIsNotAFeature(label, example) without return types