code: def test_pickle(self):
      for proto in range(2, pickle.HIGHEST_PROTOCOL + 1):
          roundtripped = pickle.loads(
              pickle.dumps(dispatched_one_arg, protocol=proto)
          )
          assert_(roundtripped is dispatched_one_arg)
  
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 1 for calling the TestArrayFunctionDispatch obj's underlying member method code with example usage: obj.test_pickle() without return types