def encode_to_stream(self, value, stream, nested):
    raise NotImplementedError
Testing the undefined_url view.
dataset/ETHPy150Open GoogleCloudPlatform/DataflowPythonSDK/google/cloud/dataflow/coders/coder_impl.py/CoderImpl.encode_to_stream--crossover with--dataset/ETHPy150Open caktus/django-treenav/treenav/tests/test_views.py/TreeNavViewTestCase.test_undefined_url