code: def _test_calls(self, xp):
      x_data = xp.arange(12).astype(numpy.float32).reshape((2, 6))
      x = chainer.Variable(x_data)
      self.linear(x)
      self.linear(x_data + 1)
      self.linear(x_data.reshape((2, 3, 2)))
  
imports: import unittest
  import chainer
  from chainer import cuda
  from chainer import testing
  from chainer.testing import attr
  from chainer.testing import condition
  import numpy
  from chainerrl.links import noisy_linear
label_desc: Use image node_id 2 for calling the TestFactorizedNoisyLinear obj's underlying member method code with example usage: obj._test_calls(xp) without return types