code: def _skip_chainerx_unsupported_dtype(self):
      supported_dtypes = chainerx.testing.dtypes.all_dtypes
      if (
          self.in_type.__name__ not in supported_dtypes
          or self.out_type.__name__ not in supported_dtypes
      ):
          raise unittest.SkipTest(
              "ChainerX does not support either of {} or {} dtypes".format(
                  self.in_type.__name__, self.out_type.__name__
              )
          )
  
imports: import unittest
  import numpy
  import chainer
  from chainer import functions
  from chainer import testing
  from chainer.testing import attr
  import chainerx
label_desc: Use image node_id 1 for calling the TestCast obj's underlying member method code with example usage: obj._skip_chainerx_unsupported_dtype() without return types