code: def test_pass(self, xp, dtype):
      def func():
          pass
  
      return func
  
imports: import threading
  import unittest
  from unittest import mock
  import pytest
  import cupy
  from cupy import testing
  from cupy_tests.core_tests.fusion_tests import fusion_utils
label_desc: Use image node_id 1 for calling the TestReturnNone obj's underlying member method code with example usage: obj.test_pass(xp, dtype) and returns: func