code: def test_variable(self):
      x = chainer.Variable(self.data)
      ret = functions.broadcast_to(x, self.shape)
      self.assertIs(x, ret)
  
imports: import unittest
  import numpy
  import chainer
  from chainer.backends import cuda
  from chainer import functions
  from chainer import gradient_check
  from chainer import testing
  from chainer.testing import attr
  from chainer.utils import type_check
  import chainerx
label_desc: Use image node_id 3 for calling the TestBroadcastToSkip obj's underlying member method code with example usage: obj.test_variable() without return types