code: def test_not_implemented(self):
      class MyArray:
          def __array_function__(self, func, types, args, kwargs):
              return NotImplemented
  
      array = MyArray()
      with assert_raises_regex(TypeError, "no implementation found"):
          dispatched_one_arg(array)
  
imports: import inspect
  import sys
  import os
  import tempfile
  from io import StringIO
  from unittest import mock
  import pickle
  import pytest
  import numpy
  from numpy.testing import assert_, assert_equal, assert_raises, assert_raises_regex
  from numpy._core.overrides import _get_implementing_args, array_function_dispatch, verify_matching_signatures
label_desc: Use image node_id 4 for calling the TestArrayFunctionDispatch obj's underlying member method code with example usage: obj.test_not_implemented() and returns: NotImplemented