code: def _check(self, xp):
      self.assertIsInstance(self.link, chainer.Link)
      self.assertEqual(self.link.xp, xp)
  
      outputs = self.link("ignored", -1, "inputs", 1.0)
  
      if isinstance(self.outputs, tuple):
          originals = self.outputs
          outputs = outputs
      else:
          originals = (self.outputs,)
          outputs = (outputs,)
  
      self.assertEqual(len(originals), len(outputs))
  
      for orig, out in zip(originals, outputs):
          self.assertIsInstance(out, chainer.Variable)
          self.assertEqual(out.shape, orig.shape)
          self.assertEqual(out.dtype, orig.dtype)
  
          self.assertEqual(
              chainer.backends.cuda.get_array_module(out.array), xp
          )
          out.to_cpu()
          np.testing.assert_equal(out.array, orig)
  
file_path: chainercv/tests/utils_tests/testing_tests/test_constant_stub_link.py
imports: import numpy
  import unittest
  import chainer
  from chainer import testing
  from chainer.testing import attr
  from chainercv.utils import ConstantStubLink
label_desc: Use image node_id 2 for calling the TestConstantStubLink obj's underlying member method code with example usage: obj._check(xp) without return types