code: def test_copyto_where_multigpu_raises_6(self, dtype):
      self._check_copyto_where_multigpu_raises(dtype, 6)
  
imports: import itertools
  import warnings
  import numpy
  import pytest
  import cupy
  from cupy import cuda
  from cupy import testing
label_desc: Use image node_id 15 for calling the TestBasic obj's underlying member method code with example usage: obj.test_copyto_where_multigpu_raises_6(dtype) without return types