code: def test_packbits_order(self):
      for bo in ["big", "little"]:
          self.check_packbits([0], bitorder=bo)
          self.check_packbits([1], bitorder=bo)
          self.check_packbits([0, 1], bitorder=bo)
          self.check_packbits([1, 0, 1, 1, 0, 1, 1, 1], bitorder=bo)
          self.check_packbits([1, 0, 1, 1, 0, 1, 1, 1, 1], bitorder=bo)
          self.check_packbits(
              numpy.arange(24).reshape((2, 3, 4)) % 2, bitorder=bo
          )
  
file_path: cupy/tests/cupy_tests/binary_tests/test_packing.py
imports: import numpy
  import unittest
  import pytest
  import cupy
  from cupy import testing
label_desc: Use image node_id 4 for calling the TestPacking obj's underlying member method code with example usage: obj.test_packbits_order() without return types