code: def test_void_and_structured_with_subarray(self, casting):
      # test case corresponding to gh-19325
      dtype = np.dtype([("foo", "<f4", (3, 2))])
      expected = casting == "unsafe"
      assert np.can_cast("V4", dtype, casting=casting) == expected
      assert np.can_cast(dtype, "V4", casting=casting) == expected
  
imports: import pytest
  import textwrap
  import enum
  import random
  import ctypes
  import numpy
  from numpy.lib.stride_tricks import as_strided
  from numpy.testing import assert_array_equal
  from numpy.core._multiarray_umath import _get_castingimpl
label_desc: Use image node_id 16 for calling the TestCasting obj's underlying member method code with example usage: obj.test_void_and_structured_with_subarray(casting) without return types