code: def test_ifftn_load(self, xp, dtype):
      return self._test_load_helper(xp, dtype, "ifftn")
  
imports: import contextlib
  import string
  import sys
  import tempfile
  from unittest import mock
  import numpy
  import pytest
  import cupy
  from cupy import testing
label_desc: Use image node_id 3 for calling the TestNdCallbacks obj's underlying member method code with example usage: obj.test_ifftn_load(xp, dtype) and returns: self